QUADTECH/QUADTECH Sentry 10, 20, 30 Plus Instruction QUADTECH

User Manual: QUADTECH/QUADTECH Sentry 10, 20, 30 Plus Instruction

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Sentry Plus Series

Hipot Testers

Instruction Manual

Form 150697/A4

QuadTech, Inc., 2003

5 Clock Tower Place, 210 East

Maynard, Massachusetts, U.S.A. 01754

January 2005

Telephone: 978-461-2100

Sales: 800-253-1230

Facsimile: 978-461-4295

Website: www.quadtech.com

The material in this manual is for informational purposes only and is subject to change, without notice.

QuadTech assumes no responsibility for any error or for consequential damages that may result from the

misinterpretation of any procedures in this publication.

WARNING

Potentially dangerous voltages may be present on front and rear panel terminals. Follow all warnings in

this manual when operating or servicing this instrument. Dangerous levels of energy may be stored in

capacitive devices tested by this unit. Always make sure the high voltage indicator is not on when

connecting or disconnecting the device under test.

Product will be marked with this symbol (ISO#3864) when it is necessary for the user to refer to

the instruction manual in order to prevent injury or equipment damage.

Product marked with this symbol (IEC417) indicates presence of direct current.

Product will be marked with this symbol (ISO#3864) when voltages in excess of 1000V are

present.

Page 2 of 85

Page 3 of 85

Contents

Warranty ............................................................................................................5

Specifications ............................................................................................................7

Accessories ............................................................................................................11

Safety Precautions....................................................................................................13

Condensed Operating Instructions ........................................................................15

Introduction - Section 1

1.1 Unpacking and Inspection..............................................................................21

1.2 Product Overview ..........................................................................................21

1.3 Controls and Indicators..................................................................................22

1.3.1 Front Panel Controls and Indicators .................................................22

1.3.2 Rear Panel Controls and Connectors ................................................23

1.4 Installation .....................................................................................................24

1.4.1 Dimensions ........................................................................................24

1.4.2 Instrument Positioning.......................................................................24

1.4.3 Power Requirements ..........................................................................24

1.4.4 Safety Inspection................................................................................25

Operation - Section 2

2.1 Terms and Conventions .................................................................................27

2.2 Start-Up..........................................................................................................31

2.3 Programming Electrical Safety Tests.............................................................31

2.4 Programming a Ground Continuity Test .......................................................35

2.5 Programming an AC Hipot Test ....................................................................37

2.6 Programming a DC Hipot Test ......................................................................39

2.7 Programming an Insulation Resistance (IR) Test .........................................41

2.8 Programming a Pause (PA) in Test Sequence ..............................................43

2.9 Storing a Test Setup ......................................................................................45

2.10 Programming a Multi-Step Test.....................................................................47

2.11 PRESET Test Parameters .............................................................................48

2.11.1 AC-V FREQ ......................................................................................48

2.11.2 Software AGC ...................................................................................48

2.11.3 WV AUTO RANGE .........................................................................48

2.11.4 IR AUTO RANGE ............................................................................49

2.11.5 GFI ....................................................................................................49

2.11.6 FAIL RESTART ...............................................................................49

2.12 Instrument Offset ..........................................................................................50

2.13 Connection To Device Under Test ................................................................53

2.14 Measurement Procedure.................................................................................54

Page 4 of 85

Contents (Continued)

2.15 MENU Parameters ........................................................................................56

2.15.1 MEMORY Function .........................................................................57

2.15.2 SYSTEM Function ............................................................................59

2.15.2.1 CONTRAST ...................................................................59

2.15.2.2 BUZZER VOLUME .......................................................59

2.15.2.3 EN 50191 ........................................................................59

2.15.2.4 DC 50V AGC ..................................................................60

2.15.3 OPTION Function .............................................................................60

2.15.4 CALIBRATION Function ................................................................60

2.15.5 KEY LOCK Function .......................................................................61

2.15.6 CHANGE PASSWORD Function ....................................................63

2.15.7 ERROR LOG Function .....................................................................65

2.15.8 ABOUT Function ..............................................................................65

Interface - Section 3

3.1 Remote ..........................................................................................................67

3.2 G16 International Power Strip .......................................................................70

3.3 S07 Power Entry Adapter Cable ...................................................................71

3.4 S03 Corded Product Adapter ........................................................................72

3.5 S05 Foot Switch ............................................................................................73

3.6 S08 Gun Probe ..............................................................................................74

3.7 S50 Plus Ground Bond Tester .......................................................................75

Service & Calibration - Section 4

4.1 General...........................................................................................................77

4.2 Instrument Return ..........................................................................................77

4.3 Calibration......................................................................................................77

4.3.1 Calibration Parameters.......................................................................78

4.3.2 Enable Calibration ............................................................................79

4.3.3 AC Voltage Calibration .....................................................................80

4.3.4 DC Voltage Calibration .....................................................................80

4.3.5 IR Voltage Calibration.......................................................................81

4.3.6 AC Current Calibration......................................................................82

4.3.7 DC Current Calibration......................................................................83

4.3.8 ARC Calibration ................................................................................84

4.3.9 IR Resistor Calibration .....................................................................84

4.3.10 Ground Continuity Calibration .........................................................85

4.3.11 Contrast Calibration ..........................................................................85

4.3.12 Finalize Calibration ...........................................................................85

Page 5 of 85

Warranty

QuadTech warrants that Products are free from defects in material and workmanship and, when

properly used, will perform in accordance with QuadTech’s applicable published specifications.

If within one (1) year after original shipment it is found not to meet this standard, it will be

repaired, or at the option of QuadTech, replaced at no charge when returned to a QuadTech

service facility.

Changes in the Product not approved by QuadTech shall void this warranty.

QuadTech shall not be liable for any indirect, special or consequential damages, even if

notice has been given of the possibility of such damages.

This warranty is in lieu of all other warranties, expressed or implied, including, but not

limited to any implied warranty or merchantability of fitness for a particular purpose.

SERVICE POLICY

QuadTech’s service policy is to maintain product repair capability for a period of at least five (5)

years after original shipment and to make this capability available at the then prevailing schedule

of charges.

Page 6 of 85

Page 7 of 85

Specifications

Dielectric Strength

Sentry 10, 20, & 30 Plus

AC Output Voltage: Range: 0.05 to 5kV AC, in 1V steps

Regulation: ± (1% of setting +5V)

Frequency: 50/60Hz selectable

Voltage Display: Accuracy: ± (1% of reading +5V)

Resolution: 1Volt

AC Current Display: Range: 0.001mA to 20mA AC, in 1µA steps

Accuracy: ± (1.5% of reading + 5 counts) (Total)

Sentry 20 & 30 Plus

DC Output Voltage: Range: 0.05 to 6kV DC, in 1V steps

Voltage Display: Accuracy: ± (1% of reading +5V)

Resolution: 1Volt

DC Current Display: Range: 0.0001mA to 5mA DC

Resolution: 0.1µA

Accuracy: ± (1.5% of reading + 5 counts)

Insulation Resistance

Sentry 30 Plus

Insulation Resistance: Voltage: 50 - 1000V DC in 1V steps

Accuracy: ± (1% of reading + 5V)

Range: 0.1MΩ - 50GΩ (voltage dependent)

Accuracy: 0.1MΩ - 1GΩ, ± (10% + 5counts) < 100V

0.1MΩ - 1GΩ, ± (7% + 5counts) < 500V

1MΩ - 1GΩ, ± (4% + 5counts) ≥ 500V

1GΩ - 10GΩ, ± (7% + 5counts) ≥ 500V

10GΩ - 50GΩ, ± (12% + 5counts) ≥ 500V

Page 8 of 85

Specifications (Continued)

Safety Features

Ground

Continuity Test: Programmable: 0.1Ω to 5.0Ω ±0.2Ω Accuracy, or OFF

Ground Fault

Interrupt (GFI): Shutdown of current imbalance when I > 0.5mA ±0.25mA, or OFF

In-Rush Current: DC Mode: Set detection limit: 0.5uA – 5mA in 0.0001mA increments

The programmable range for In-Rush current is dependent on the

programmed High Limit:

Range: High Limit: In-Rush:

1 0.1µA – 300µA 0.5µA – 300µA

2 0.301mA – 3.000mA 5µA – 3.000mA

3 3.01mA – 5.0mA 50µA – 5.0mA

Fast Output Cutoff: HV output voltage terminated <0.4mS after NG (Fail) result

Fast Discharge: <0.2s (Typical) Discharge of DUT upon termination of HV.

ARC Detection: Detection Current: Range: 1mA – 20mA AC and 5mA DC

Pulse Width: Minimum: 10µs

General Features

Time: Test*: 0.1sec – 999 sec, Continuous

Ramp: 0.1sec – 999 sec, OFF

Dwell: 0.1sec – 999 sec, OFF (DC & IR Mode only)

Fall: 0.1sec – 999 sec, OFF

* Test Time is limited ≤ 60seconds when the voltage and high current limit > 100VA.

* Test Time for IR is 0.3sec – 999sec, Continuous

Limits: HI/LO programmable during Test Time

LO can be set to OFF during Hipot Test

HI can be set to OFF during IR Test

Indication: Pass/fail LEDs, audible alarm

Remote Control: Inputs: START, STOP

Characteristics: 24V active low, Pulse width ≅20ms

Outputs: PASS, FAIL, UNDER TEST

Characteristics: Dry contact relay, Closed if true

115V, <100mA

Connector: 9 pin male D-series & Terminal Strip

Page 9 of 85

Specifications (Continued)

General Features

Setup Storage: 60 Memory Locations, 10 steps each

Standard

Interfaces: Remote I/O

Connectors: Front and Rear Connection

HV OUTPUT: Custom Banana Socket

RTN/LOW: Banana Socket

GC (Rear Only): Binding Post/Banana Socket

Front Panel 10 Digit Password with or without setup recall

Lockout: LED Display: LOCK

Mechanical: Bench Mount

Dimensions:(w x h x d): 10.50 x 4.50 x 14.25 inches

262.5 x 112.5 x 356.25 mm

Weight: 25.0 lbs (11.5 kg) net, 28 lbs (13.0 kg) shipping

Environmental: Specifications: 18°C to 28°C, 70% RH

Operating: 0°C to + 40

C, 80% RH

Storage: -10°C to + 60

C, 80% RH

Warm-up Time: 15 minutes

Power:

•

90 - 130V AC

•

50 or 60Hz

•

200 - 250V AC

•

300W max

Supplied:

•

Instruction Manual

•

Power Cable

•

Calibration Certificate

•

S02 Test Leads

•

Ground Continuity Lead

Safety Agency: CE, TUV

Ordering Description Catalog No.

Information: AC Hipot Tester Sentry 10 Plus

AC/DC Hipot Tester Sentry 20 Plus

AC/DC/IR Hipot Tester Sentry 30 Plus

Page 10 of 85

Page 11 of 85

Accessories

Accessories Included

Item Quantity QuadTech P/N

AC Power Cord 1 4200-0300

Power Line Fuse 3.15A 250V SB 1 520072

Power Line Fuse 1.6A 250V SB 1 520074

High Voltage Lead Set, 1m with alligator clips 1 S02

Ground Continuity Lead 1 700100

Instruction Manual 1 150697

Calibration Certificate 1 N/A

Accessories/Options Available

Item Quantity QuadTech P/N

High Voltage Lead Set, high & low, 1m (std. with unit) 1 S02

Corded Product Adaptor, 115V 1 S03

High Voltage Lead Set, high & low, 2m 1 S04

Foot Switch 1 S05

High Voltage Probe 1 S06

Power Entry Adaptor Cable 1 S07

Gun Probe 1 S08

High Voltage Lead, 1m, unterminated 1 S09

High Voltage Lead, 2m, unterminated 1 S10

Gun Probe with Remote Start 1 S11

Load Box, resistive 1 S12

Load Box, custom resistors 1 S14

Interconnection Cable to Sentry 50 Ground Bond Tester 1 S15

Ground Continuity Lead (standard with unit) 1 700100

International Power Strip 1 G16

Corded Product Adaptor, 240V 1 G25

Page 12 of 85

Page 13 of 85

Safety Precautions

WARNING

The Sentry Plus Series Hipot Tester can provide an output voltage as high as 6000V DC (5000V

AC) to the external device under test (DUT). Although the Sentry Plus unit is designed with full

attention to operator safety, serious hazards could occur if the instrument is used improperly and

these safety instructions are not followed.

1. The Sentry Plus unit is designed for operation with its chassis connected to earth ground.

The instrument is shipped with a three-prong power cord to provide this connection to

ground. This power cord should only be plugged in to a receptacle that provides earth

ground. Serious injury can result if the Sentry Plus is not connected to earth ground.

2. Tightly connect cable(s) to the (blue) RTN/LOW terminal. If this is not done, the

DUT’s casing can be charged to the high voltage test level and serious injury or electrical

shock hazards could result if the DUT is touched.

3. Never touch the metal of the High Voltage probe directly. Touch only the insulated parts

of the lead(s).

4. Never touch the test leads, test fixture or DUT in any manner (this includes insulation on

all wires and clips) when the high voltage is applied and the red DANGER light is ON.

5. Before turning on the Sentry Plus unit, make sure there is no device (DUT) or fixture

connected to the test leads.

6. After each test, press the [STOP] (red) button for safety if there is any concern that HV

may still be applied to the output terminals.

7. When the red DANGER LED is lit or flashing, NEVER touch the device under test, the

lead wires or the output terminals.

8. Before touching the test lead wires or output terminals make sure:

a) The red [STOP] button has been pressed

b) The red DANGER LED is OFF.

9. In the case of an emergency, turn OFF the POWER switch using a “hot stick” and

disconnect the AC power cord from the wall. DO NOT TOUCH THE Sentry Plus

INSTRUMENT.

10. If the DANGER LED does not go off when the [STOP] button is pressed, immediately

stop using the tester. It is possible that the output voltage is still being delivered

regardless of the TEST ON/OFF control signal.

11. When the Sentry Plus instrument is used in remote control mode, be extremely careful.

The High Voltage Output is being turned on and off with an external signal.

Page 14 of 85

Page 15 of 85

Condensed Operating Instructions

WARNING

High Voltage is applied to the white HV Output Terminal anytime the red DANGER LED is ON

or flashing. Always make sure the DANGER LED is OFF when connecting or disconnecting

the device under test (DUT).

General Information

The Sentry Plus Series Hipot Tester is a measuring instrument for direct readout of hipot output

voltage and leakage current and insulation resistance. The voltage applied to the device under

test is adjustable from 50V to 5kV AC and 50V to 6kV DC. The trip current limit is

programmable from 1uA to 20mA AC in 1uA steps and from 0.1uA to 5mA DC in 0.1uA steps.

The output voltage for Insulation Resistance tests is 50V to 1000V DC over a measurement

range of 100kΩ to 50GΩ.

Start-Up

The Sentry Plus Series unit can be operated from a power source between 90 and 250VAC at a

power line frequency of 50 or 60Hz. The standard Sentry Plus Series unit is shipped from

QuadTech with a 3.15A fuse in place for AC 90-130V operation. (A 1.6A fuse is included for

200-250V operation). The Sentry Plus unit is shipped with the line voltage selector set for 120V.

Refer to paragraph 1.4.3 for instructions on changing the fuse or line voltage selector.

Connect the Sentry Plus Series unit AC power cord to the source of proper voltage. Operate the

Sentry Plus Series instrument with its chassis connected to earth ground. The Sentry Plus

instrument is shipped with a three-prong power cord to provide this connection to ground. This

power cord should only be plugged into a receptacle that provides earth ground. Serious injury

may result if the Sentry Plus Series instrument is not connected to earth ground.

Press the [POWER] button on the front panel to apply power. To switch the power off, press the

[POWER] button again or if measurements are to be made proceed with the Test Parameter

Setup in Table COI-1. The Sentry Plus Series instrument should warm up for 15 minutes prior to

use.

NOTE

Please read this instruction manual in its entirety before operating this instrument.

These condensed operating instructions are not a substitute for all the information provided in the

remainder of this manual.

NOTE

Refer to paragraphs 2.3 through 2.9 for a full description of programming test parameters and

instruction on how to store the test setup. Test parameters must be set before the Sentry Plus

Series instrument can be zeroed.

Page 16 of 85

Condensed Operating Instructions (Continued)

There are numerous menus within the Sentry Plus Series instruments. Familiarize yourself with

these menus prior to programming a test. Figure COI-1 illustrates the STAND BY display and

lists the functions that can be accessed by pressing the [F1] through [F4] keys.

"STAND BY" or "Power-Up" Display

Function of F1 - F4 Keys

To enter programming mode.

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

1.250kV

3.0s

15.00mA

FALL

RAMP

ARC

LOWAC

STEP 1/1

To view/change preset (initial) settings.

To view/change: memory, system, option,

cal., key lock, pw, error & about.

To view the programmed test setups and

access offset function.

PROGRAM MOREMENUPRESET

F3 F4F2F1

MODE: AC/DC/IR/GC/PA

STEP: 1-10

Soft AGC.

WV Auto Range

AC-V Freq. Memory

Calibration

Option

System

Change Password

Key Lock

Error Log

IR Auto Range

About

View Test Steps (Tabular Format)

OffsetStore

Delete

Recall

Buzzer Volume

Contrast

Multi-Link

High Limit

Voltage

EN 50191

DC 50V AGC

Ramp Time

Test Time

Low Limit

Fall Time

ARC Limit

In Rush Current

Manufacturer

Software version

(Need password to enter)

Insert

Delete

(Need password to enter)

Instrument

Status

GFI

FAIL Restart

MORE..

: OFF

Dwell Time

(DC)

(DC, IR)

Figure COI-1: Sentry Plus Series Menus

Page 17 of 85

Condensed Operating Instructions (Continued)

With the Sentry Plus Series instrument in “STAND BY” (or power-up display) status, follow the

steps in Table COI-1 to program an AC, DC, IR or GC test or insert a Pause in the test sequence.

Figure COI-2: “STAND BY” and PROGRAM Displays

"STAND BY"

DISPLAY

To enter programming mode.

Display

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.000kV

3.0s

0.500mA

FALL

RAMP

ARC

LOWACSTEP 1/1

To move highlighted box around

display to select parameter to change

To exit programming mode.

To toggle choices of highlighted box.

To change value in highlighted box.

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

FALL

RAMP

ARC

LOWACSTEP 1/1

VOLT

HIGH

TIME

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

I-RUS

FALL

RAMP

ARC

LOWDCSTEP 1/1

VOLT

HIGH

TIME

Display

To select test mode: AC/DC/IR/GC/PA

To view/change preset (initial)

test parameters.

To view/change system parameters:

memory, system, option, calibration, key

lock, password, error, & about.

To view the programmed test setups and

access offset function.

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

FALL

RAMP

HIGHIRSTEP 1/1

VOLT

LOW

TIME

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

LOW

GCSTEP 1/1

CURR

HIGH

DWELL

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

PASTEP 1/1

PAUSE

UNDER TEST SIGNAL

To select test mode: AC/DC/IR/GC/PA

Display

To select test mode: AC/DC/IR/GC/PA

OFF

PROGRAM MODE DISPLAYS

0.000kV

0.500mA

3.0s

0.000kV

0.500mA

3.0s

OFF

3.0s

1.0M

Ω

0.000kV

: 0.0A

1.0

Ω

3.0s

OFF

PAUSE MODE

OFFDWELL

DWELL : OFF

Page 18 of 85

Condensed Operating Instructions (Continued)

Table COI-1: Test Parameter Setup

Step Test Parameter AC Hipot DC Hipot IR GC Range

1 To enter

programming mode [F1] =

PROGRAM [F1] =

PROGRAM [F1] = PROGRAM

2 Select Test Step [F1] = UP

[F3] = NEXT [F1] = UP

[F3] = NEXT 1-10

3 Select Test Mode [F1] = UP

[F3] = NEXT [F1] = UP

[F3] = NEXT AC, DC, IR, GC, PA

4 Set Test Voltage

Set Current (GC)

[F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 0.05-5kV AC

0.05-6kV DC

0.05-1kV IR

0.1A GC

5 Set High Limit *

Set Low Limit (IR)

[F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 0.001-20mA AC

0.0001-5mA DC

0.1-50000MΩ IR

0, 0.1-5Ω GC

6 Set Test Time

Set Dwell (GC) ***

[F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 0, 0.1-999s AC

0, 0.1-999s DC

0, 0.1-999s IR

0.1-1s GC

7 Set Low Limit **

Set High Limit (IR)

[F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 0-20mA AC

0-5mA DC

0-50GΩ IR

0-5Ω GC

8 Set ARC Limit [F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 1-20mA AC

1-5mA DC

9 Set Ramp Time [F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 0-999s AC

0-999s DC

0-999s IR

10 Set Dwell Time*** [F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 0-999s DC

0-999s IR

11 Set Fall Time [F1] = INC.

[F3] = NEXT [F1] = INC.

[F3] = NEXT 0-999s AC

0-999s DC

0-999s IR

12 Set In-Rush Current [F1] = INC.

[F3] = NEXT 0, 0.5uA-5mA DC

13a To program next test

step OR [F1] = NEW

OR [F1] = NEW

OR Program next step

13b To exit

programming mode [F4] = EXIT [F4] = EXIT [F4] = EXIT Exit programming

* High limit decision is made throughout test time.

** Unit will make low limit decision at the end of test.

* ** Limits will be checked at end of dwell time.

Page 19 of 85

Condensed Operating Instructions (Continued)

Offset

After setting your test parameters, zero the Sentry Plus Series instrument by using the automatic

offset. With no device connected, connect the appropriate cable (or other fixture) into the

OUTPUT connectors. Refer to paragraph 2.13 cable connections based on test to be performed.

Return and HV test leads should not be connected together (open circuit) for AC and DC hipot

tests. Return and GC test leads should be connected (short circuit) for a GC test. There is no

offset in an IR test.

NOTE:

If Ground Continuity (GC) is turned ON when performing an offset, the continuity lead must be connected to the

return (RTN/LOW) terminal, otherwise turn the continuity test OFF.

Prior to performing the OFFSET function:

• Allow the instrument to warm up for 15 minutes.

• Connect the Test cables (or fixture) to the front panel OUTPUT and RTN/LOW connectors.

• Program the test steps.

With the instrument in STAND BY status:

• Press [F4] = MORE

• Press [F3] = OFFSET

• Follow instructions on display: i.e.: connect OPEN across OUTPUT terminal.

• Press green [START] button.

• Wait while instrument gets OFFSET value.

• The OFST block at the bottom of the display is now highlighted (back lit).

• Press [F4] = MORE to return to STAND BY status.

OPEN

When ready, press [START] to get offset values

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

PRESS START KEY TO GET OFFSET..

Please open the HV output terminal

No offset in IR mode.

Figure COI-3: Zero/Offset OPEN Configuration

Page 20 of 85

Condensed Operating Instructions (Continued)

Connection to Device under Test (DUT)

Figure COI-4 illustrates the connection of the Sentry Plus Series unit to a single DUT using the

S02 1-meter HV cable set that comes standard with the instrument. The custom white banana

plug/red alligator clip is connected between the OUTPUT terminal on the Sentry Plus Series unit

and the high side of the device under test. The black banana plug/alligator clip is connected

between the RTN/LOW terminal on the Sentry Plus Series unit to the low side of the DUT.

DUT

S02

Cable

Set

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

1.250kV

STEP 1/5

STAND BY OFST

0.500mA

3.0s

AC LOW: OFF

ARC: OFF

RAMP: OFF

FALL: OFF

PROGRAM

PRESET

RMT LOCK ERR

MORE..

COI-4: Connection to Device under Test

Measurement Mode

Turn [POWER] ON.

Allow Sentry Plus Series instrument a 15-minute warm up time.

Connect S02 Black ground cable to Sentry Plus Series unit RTN/LOW terminal

Connect S02 White/red HV cable to Sentry Plus Series unit OUTPUT terminal.

Press [F1] = PROGRAM and enter test parameters. When finished programming, press

[F4] = EXIT to return to STAND BY status.

Press [F4] = MORE to access Offset function. Press [F3] = OFFSET. Follow Offset

instructions. When Offset is complete, press [F4] = MORE to return to STAND BY.

Connect device under test (DUT) to test leads.

Press [START].

Record measurement.

10.

Press [STOP].

Introduction Page 21 of 85

Section 1: Introduction

1.1 Unpacking and Inspection

Inspect the shipping carton before opening. If damaged, contact the carrier agent immediately.

Inspect the Sentry Plus Series instrument for any damage. If the instrument appears damaged or

fails to meet specifications notify QuadTech (refer to instruction manual front cover) or its local

representative. Retain the original shipping carton and packing material for future use such as

returning the instrument for recalibration or service.

1.2 Product Overview

The Sentry Plus Series is available in three models, the 10, 20 and 30, all of which provide AC

Hipot testing capability. Additionally, the Sentry 20 & 30 Plus instruments provide DC Hipot

testing. The Sentry 30 Plus unit provides Insulation Resistance testing. The hipot test can be

programmed over a voltage range of 0.05 to 5kV AC and 0.05 to 6kV DC with a min/max

leakage current detection range of 0.001 to 20mA AC and 0.0001 to 5mA DC. Insulation

resistance measurements are possible to 50GΩ at programmable DC test voltages between 50

and 1000V. Each instrument comes standard with programmable ground continuity, internal

storage containing 60 memory locations (10 steps each) and a remote interface with start/stop

inputs & pass/fail outputs.

Figure 1-1: Sentry 30 Plus AC/DC/IR Hipot Tester

UL Requirements

The Sentry Plus Series instruments meet the requirements outlined by UL for Hipot Testers. The

Sentry Plus indicates the test potential (test voltage), has both visual and audible indication of

failure and the STOP switch must be manually pressed prior to another measurement being

made. The Sentry Plus Series instrument has a 100VA output [(5000V * 20mA) = 100VA]. The

Sentry Plus Series instrument also measures and displays the output voltage directly at the output

terminals during the test.

Page 22 of 85 Introduction

1.3 Controls and Indicators

1.3.1 Front Panel Controls and Indicators

Figure 1-2 illustrates the controls and indicators on the front panel of the Sentry Plus Series

AC/DC/IR Hipot Tester. Table 1-1 identifies them with description and function.

11 10 9

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

Figure 1-2: Sentry 30 Plus Front Panel Controls & Indicators

Table 1-1: Sentry 30 Plus Front Panel Controls & Indicators

Reference

Number

Figure 1-2

Name Type Function

1 Power Green Push Button Apply AC Power: 1=ON, 0=OFF

2 START Green Push Button Initiate Test: HV applied to OUTPUT terminal

3 STOP Red Push Button Stop Test: HV terminated at OUTPUT terminal

4 Display LCD Program Menu, Test Setup, Measurement Results,

Memory Contents, Calibration

5 F1, F2, F3

and F4 Gray Push Buttons Select Instrument Functions

Keys perform different functions under different menus.

Right side of display shows corresponding key function.

6 OUTPUT White Custom

Banana Socket High Voltage (Potential) Terminal

7 RTN/LOW Blue Banana Socket RTN: Low voltage reference terminal

LOW: Common ground reference terminal

8 DANGER Red LED When lit, high voltage is present at OUTPUT terminals

9 FAIL Red LED When lit, DUT judged as FAIL. Output voltage is

immediately cut off. Press [STOP] to disable FAIL LED

10 PASS Green LED When lit, DUT judged as PASS

11 UPDATE Recessed P-B Qualified Service Personnel Only

12 CAL Recessed P-B Enable/Disable Instrument Calibration

Introduction Page 23 of 85

1.3.2 Rear Panel Controls and Connectors

Figure 1-3 illustrates the controls and connectors on the rear panel of the Sentry Plus Series

AC/DC/IR Hipot Tester. Table 1-2 identifies them with description and function.

3254

10 9

HV OUTPUT

HIGH VOLTAGE

Max 5kVAC/6kVDC

RTN/LOW

CONT. CHECK OPTION

VOLTAGE SELECTOR

POLLUTION DEGREE 2

INS TALLA TION CA TEGORY I I

WA RNING: F OR CONTI NUED PROTECTI ON

AGAINST FIRE HAZARD, REPLACE ONLY WITH

THE SAME TYPE AND RATING OF FUSE AS

SPECIFIED FOR THE LINE VOLTAGE BEING

UTILIZED.

CAUTION: NO OPERATOR SERVICEABLE PARTS

INSIDE. REFER SERVICING TO QUALIFIED

PERSONNEL.

90V - 110V ~

216V - 250V ~

198V - 242V ~

108V - 132V ~

3.15AT

250V

1.6AT

250V

INTER

LOCK

COM

START

RESET

100V/120V/220V/240V~

50/60Hz 300W MAX

MODEL NO.

SERIAL NO.

FAN 50

C AUTO ON/OFF

Figure 1-3: Rear Panel Sentry Plus Series Instrument

Table 1-2: Sentry Plus Series Rear Panel Controls & Connectors

Reference #

Figure 1-3 Name Type Function

1 VOLTAGE

SELECTOR 2 Red 2-position

Slide Switches Select Voltage Level corresponding to AC Source

90V – 110V: 3.15A 250V Slow Blow

110V – 130V: 3.15A 250V Slow Blow

200V – 240V: 1.6A 250V Slow Blow

220V – 250V: 1.6A 250V Slow Blow

2 Remote Silver 9-pin

D-Type Connector Remote Connection: Inputs: Start, Reset

Outputs: Pass, Fail, Under Test

3 CONT CHK OPT. Black banana plug Connection for Ground Continuity Check

4 TUV CE Sticker Instrument Safety Agency Listing

5 Remote Black 5-screw

Terminal Strip Remote Connection: Start, Reset, Com, Interlock

6 Fan SF11580AT

115V 50/60Hz 0.10A Cool Unit: T≥50°C = ON, T<45°C = OFF

7 Ground Silver Banana Plug Instrument Chassis Ground Connection

8 AC Line Input Black 3-wire inlet

module & fuse holder Connection to AC power source

Fuse Drawer: 3.15A 250V or 1.6A 250V (see #1)

9 RTN/LOW Blue Banana Socket RTN: Low voltage reference terminal

LOW: Common ground reference terminal

10 HV OUTPUT White Custom

Banana Socket Rear panel High Voltage (Potential) Terminal

Page 24 of 85 Introduction

1.4 Installation

1.4.1 Dimensions

The Sentry Plus series unit is supplied in a bench configuration, i.e., in a cabinet with resilient

feet for placement on a table. Flip feet are provided under the front feet so that the Sentry Plus

instrument can be tilted up for convenient operator viewing.

4.50"

112.50mm

14.25"

356.25mm

10.50"

262.5mm

RTN/L OW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

QuadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

Figure 1-4: Sentry Plus Series Instrument Dimensions

1.4.2 Instrument Positioning

The Sentry Plus unit contains a graphic display for direct readout of measured parameters. The

optimum angle for viewing is slightly down and about 10 degrees either side of center. For

bench operation the front flip feet should always be used to angle the instrument up. In bench or

rack mount applications the instrument should be positioned with consideration for ample air

flow around the rear panel fan ventilation hole. An open space of at least 3 inches (75mm) is

recommended behind the rear panel. Testing should be performed on a non-conductive surface.

An ESD mat is not a recommended test platform.

1.4.3 Power Requirements

The Sentry Plus instrument can be operated from a power source of 90 to 132V AC or 198 to

250V AC. Power connection is via the rear panel through a standard receptacle. Before

connecting the 3-wire power cord between the unit and AC power source, make sure the voltage

selection switches on the rear panel (Figure 1-5) are in accordance with the power source being

used. For a 90-132V source, use a 3.15A 250V fuse. For a 198-250V source, use a 1.6A 250V

fuse. Always use an outlet that has a properly connected protection ground.

Introduction Page 25 of 85

WARNING

MAKE SURE THE UNIT HAS BEEN DISCONNECTED FROM ITS AC POWER SOURCE

FOR AT LEAST FIVE MINUTES BEFORE PROCEEDING.

Procedure For Changing A Sentry Plus Series Fuse

Remove the fuse drawer, by pressing the black tab located at the center of the extended

fuse drawer, just below the 3-prong receptacle, and pull outward.

Once the fuse drawer has been removed from the instrument slide out the fuse from the holder

and replace. Make sure the new fuse is of the proper rating. Note that the fuse drawer can also

be used to store a spare fuse.

Install the fuse drawer back in the inlet module by pushing in until it locks securely in place.

Figure 1-5: Close-Up of Sentry Plus Series Rear Panel

1.4.4 Safety Inspection

Before operating the instrument inspect the power inlet module on the rear of the Sentry Plus to

ensure that the properly rated fuse is in place, otherwise damage to the unit is possible. Make

sure that the voltage selector switches are set in accordance with the power source in use. Refer

to paragraph 1.4.3 and Figure 1-5.

The Sentry Plus instrument is shipped with a standard U.S. power cord, QuadTech P/N 4200-

0300 (with Belden SPH-386 socket or equivalent, and a 3-wire plug conforming to IEC 320).

Make sure the instrument is only used with these cables (or other approved international cord

set) to ensure that the instrument is provided with connection to protective earth ground.

The surrounding environment should be free from excessive dust to prevent contamination of

electronic circuits. The surrounding environment should also be free from excessive vibration.

Do not expose the Sentry Plus instrument to direct sunlight, extreme temperature or humidity

variations, or corrosive chemicals.

100V/120V/220V/240V~

50/60Hz 300W MAX

VOLTAGE SELECTOR

90V - 110V ~

216V - 250V ~

198V - 242V ~

108V - 132V ~

3.15AT

250V

1.6AT

250V

FUSE Drawer

Operation Page 27 of 85

Section 2: Operation

2.1 Terms and Conventions

Table 2-1: Measurement Unit Prefixes

Multiple Scientific Engineering Symbol

1000000000000000 1015 Peta P

1000000000000 1012 Tera T

1000000000 109 Giga G

1000000 106 Mega M

1000 103 Kilo k

.001 10-3 milli m

.000001 10-6 micro u

.000000001 10-9 nano n

.000000000001 10-12 pico p

.000000000000001 10-15 femto f

ARCing: Sparking or ‘flashing over’ caused by a breakdown of electrical

insulation.

Current:

AC: Alternating Current. AC is an electrical current that has one

polarity during part of the cycle and the opposing polarity during

the other part of the cycle. Residential electricity is AC.

DC: Direct Current. Non-reversing polarity. The movement of charge

is in one direction. Used to describe both current and voltage.

Batteries supply direct current (DC).

Charging Current: An insulated product exhibits the basic characteristics of a

capacitor. Application of a voltage across the insulation causes a

current to flow as the capacitor charges. This current

instantaneously rises to a high value as voltage is applied then

exponentially decays to zero as the DUT becomes fully charged.

Charging current decays to zero much faster than dielectric

absorption.

Page 28 of 85 Operation

Dielectric Absorption: The physical phenomenon in which insulation appears to absorb

and retain an electrical charge slowly over time. Apply a voltage

to a capacitor for an extended period of time. Then quickly

discharge it to zero voltage. Leave the capacitor open circuited

for a period of time then connect a voltmeter to it and measure the

residual voltage. The residual voltage is caused by the dielectric

absorption of the capacitor.

Dielectric Strength: The ratio between the voltage at which breakdown of the insulating

material occurs and the distance between the two points subject to

the applied voltage.

Dielectric Withstand Test: This is the most common electrical safety test performed. A high

voltage (either AC or DC) is applied to determine if a breakdown

will occur in the insulation of the DUT. Dielectric Withstand is

also referred to as a hipot (high potential) test.

Discharge: The act of draining off an electrical charge to ground. Devices that

retain charge should be discharged after an IR test or DC hipot test.

DUT: Device Under Test. (i.e. the product being tested).

Frequency: The rate at which current or voltage reverses polarity and then

back again completing a full cycle, measured in Hertz (Hz) or

cycles/second. AC Line Frequency = 50/60 Hz.

Ground:

Ground: The base reference from which voltages are measured, nominally

the same potential as the earth. Ground is also the side of a circuit

that is at the same potential as the base reference.

Ground Bond Test: Test to verify that all conductive parts of a product that are

exposed to user contact are connected to the power line ground.

The ground bond test verifies the integrity of the ground

connection using a high current AC signal with current level as

high as 30Amps. Ground bond provides a better simulation of how

a product will perform under an actual fault condition.

Ground Continuity: Test to verify that all conductive parts of a product that are

exposed to user contact are connected to the power line ground.

GC Test normally performed with a low current DC signal that

checks to ensure the ground connection has a resistance of <1Ω.

Operation Page 29 of 85

Insulation Resistance: Measures the total resistance between any two points separated by

electrical insulation. The IR test determines how effective the

dielectric (insulation) is in resisting the flow of electrical current.

Interface:

IEEE-488: General Purpose Interface Bus (GPIB). GPIB is an industry

standard definition of a Parallel bus connection for the purpose of

communicating data between devices.

RS232: An industry standard definition for a Serial line communication

link or port.

Scanner: An electronic device designed to switch or matrix signals.

Leakage Current (LC):

Leakage Current: The residual flow of current that flows through the insulation after

a high voltage has been applied for a period of time. The leakage

current is equal to the applied voltage divided by the insulation

resistance. Leakage current is the main measured value for AC

hipot and DC hipot.

Applied Part LC Test: A line leakage current test that measures the current that would

flow from, to or between applied parts such as sensor and patient

leads. This test is the most complicated and time-consuming line

leakage test.

Earth LC Test: The most important and most common of the line leakage tests.

Earth leakage current is basically the current flowing back through

the ground conductor on the power cord. It is measured by

opening the ground conductor, inserting a circuit with the

simulated impedance of the human body then measuring the

voltage across part of the circuit with a true RMS voltmeter.

Enclosure LC Test: A line leakage test that measures the current that flows through the

human body if the body had touched the enclosure of the DUT.

Line LC Test: A line voltage leakage current test simulates the effect of a person

touching exposed metal parts of a product and detects whether or

not the leakage current that flows through the person’s body

remains below a safe level. Apply power to the product being

tested, then measure the leakage current from any exposed metal

on the chassis of the product under a fault conditions such as “no

ground”. A special circuit is used to simulate the impedance of the

human body.

Page 30 of 85 Operation

Limits:

High Limit: The upper value for a test to be considered a pass. If the measured

value is higher than the high limit the test is considered a fail. In

hipot, leakage current and ground bond test modes a high limit is

required.

Low Limit: The lower value for a test to be considered a pass. If the measured

value is lower than the low limit the test is considered a fail. In

insulation resistance test mode a low limit is required. In an AC or

DC Hipot test, the low limit FAIL decision occurs at the end of the

programmed test time.

Mode: The test to be performed such as: AC Hipot (AC), DC Hipot (DC),

Insulation Resistance (IR), Ground Continuity (GC) or Pause (PA).

Step: The order in which the tests will be performed. For example if

step 1 is a ground continuity test, step 2 an AC hipot and step 3 an

insulation resistance measurement then when the START button is

pressed, the Sentry will perform a GC test followed by an AC test

then an IR test.

Test Time:

Ramp: The period of time for the voltage to climb to programmed level.

Dwell: The period of time for the voltage to settle at programmed level.

Test: The period of time that the voltage is applied to the DUT.

Fall: The period of time for the voltage to decrease back to 0.

Test Current:

Real Current: The resistive current component of the device under test. The

resistive component is attributed to the resistance of the device’s

insulation.

Total Current: A measure of the resistive and reactive current components of the

device under test. The reactive component is attributed to the

capacitive or inductive components of the circuit

Total Current

Reactive

(Capacitive)

Current

Component

Real

(Resistive)

Current

Component

Total Current "A"

Total Current "B"

"A" "B"

Real "B"

Total "B"

Real "A"

Reactive "B"

Total "A"

Reactive "A"

100

200 > 100% Change

101

100

100 >

> 1% Change

0% Change

Operation Page 31 of 85

2.2 Startup

Check to make sure the Red Voltage Selector Switches on the rear panel agree with the power

source available. Depending on the power source the switch positions should be in the up or

down positions as shown in Figure 1-5 (Close-Up of Sentry Plus Series Rear Panel).

WARNING

NEVER TOUCH THE TEST LEADS IN ANY MANNER (this includes insulation on all wires and clips) when

HIGH VOLTAGE IS APPLIED and red DANGER LED is ON.

USE ALL PRECAUTIONS NECESSARY TO AVOID TOUCHING THE DEVICE UNDER TEST WHEN THE

RED DANGER LED IS ON OR FLASHING.

Connect the instrument power cord to the source of proper voltage. The instrument is to be

used only with three-wire grounded outlets.

Power is applied to the Sentry Plus Series instrument by pressing the green [POWER] switch on

the front panel to the ON (1 position). The Sentry Plus Series unit should warm up for a period

of at least 15 minutes prior to use.

WARNING

DO NOT TURN INSTRUMENT POWER ON OR OFF WITH TEST DEVICES CONNECTED.

2.3 Programming Electrical Safety Tests

The Sentry Plus Series instrument is capable of performing the tests listed in Table 2-2. A

single-step test can be performed on a device and is programmed as described in paragraphs 2.4

– 2.8. When the device under test requires a multi-step test the order of test precedence is

important. Refer to paragraph 2.9 for test setup store/recall instructions and to paragraph 2.10 for

instructions on programming a multi-step test.

Table 2-2: Sentry Plus Series Electrical Safety Tests

Test Software

Designation Programming

Instructions

Paragraph

Sentry Plus Series

Instrument

Ground Continuity GC 2.4 10, 20, 30

AC Hipot AC 2.5 10, 20, 30

DC Hipot DC 2.6 20, 30

Insulation Resistance IR 2.7 30

Pause PA 2.8 10, 20, 30

Storing a Test Setup 2.9 10, 20, 30

Multi-Step 2.10 10, 20, 30

NOTE:

This manual is set up so if you follow the instructions in paragraphs 2.4 through 2.9 and you will

have programmed a 5-step test setup and stored it to memory location 1.

Page 32 of 85 Operation

Function keys of the STAND BY Display

The function keys on the right hand side of the display allow the operator to access the numerous

menus imbedded within the Sentry Plus Series instrument software. Familiarize yourself with

these menus prior to programming a test. Figure 2-1 illustrates the STAND BY display and lists

the functions that can be accessed by pressing the [F1] through [F4] keys.

"STAND BY" or "Power-Up" Display

Function of F1 - F4 Keys

To enter programming mode.

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

1.250kV

3.0s

15.00mA

FALL

RAMP

ARC

LOWAC

STEP 1/1

To view/change preset (initial) settings.

To view/change: memory, system, option,

cal., key lock, pw, error & about.

To view the programmed test setups and

access offset function.

PROGRAM MOREMENUPRESET

F3 F4F2F1

MODE: AC/DC/IR/GC/PA

STEP: 1-10

Soft AGC.

WV Auto Range

AC-V Freq. Memory

Calibration

Option

System

Change Password

Key Lock

Error Log

IR Auto Range

About

View Test Steps (Tabular Format)

OffsetStore

Delete

Recall

Buzzer Volume

Contrast

Multi-Link

High Limit

Voltage

EN 50191

DC 50V AGC

Ramp Time

Test Time

Low Limit

Fall Time

ARC Limit

In Rush Current

Manufacturer

Software version

(Need password to enter)

Insert

Delete

(Need password to enter)

Instrument

Status

GFI

FAIL Restart

MORE..

: OFF

Dwell Time

(DC)

(DC, IR)

Figure 2-1: STAND BY Function Key Menus

Operation Page 33 of 85

POWER UP and STAND BY Displays

The Sentry Plus Series instruments have multiple menus or displays that may seem confusing at

first glance. In an attempt to clarify the numerous functions of the software, this instruction

manual will illustrate these displays in a (hopefully) logical format. The function keys (F1, F2,

F3 & F4) perform different tasks depending upon the menu currently shown on the display.

Figure 2-2 illustrates the instrument display when the instrument is initially turned on.

Figure 2-2: Power-Up Display

After 3 seconds, the instrument display reverts to the STAND BY display as illustrated in Figure

2-3. The box in the lower left hand corner denotes the instrument status.

Figure 2-3: STAND BY Display

To access the programming function of the Sentry Plus Series instrument in the STAND BY

menu, press the [F1] key (PROGRAM). Once in the PROGRAM display, select the test step

then the test mode (AC, DC, IR, GC or PA). Paragraphs 2.4 - 2.8 illustrate how to program the

specific parameters of each of the 5 tests.

NOTE

This manual is set up so if you follow the instructions in paragraphs 2.4-2.9 you will have programmed a 5-step test

(GC, AC, DC, IR and PA) and saved to memory location 1.

To enter programming mode.

To view/change preset (initial)

test parameters.

To view/change system parameters:

memory, system, option, calibration, key

lock, password, error, & about.

To view the programmed test setups and

access offset function.

Instrument Status Remote

Status

On/Off

Front

Panel

Lock Out

Status

On/Off

Offset

Status

On/Off

Error

Status

On/Off

When box is highlighted (back lit),

the function is

ON.

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

1.250kV

3.0s

15.00mA

FALL: OFF

RAMP: OFF

ARC : OFF

LOW : OFFAC

STEP 1/1

Function

F1 - F4 Keys

Test

Settings

Test Mode

AC, DC, IR,

GC or PA

Test Step 1/x

x = 1-10

Test Voltage (kV)

Test Time (sec)

Test Current (mA)

Memory

Location Mx

x = 1-60

STAND BY

EXIT

RMT ERROFSTLOCKWAIT 3s

Function of F1 - F4 KeysSoftware

Memory

Line Frequency

Calibration

Model #

SENTRY PLUS 30 VERSION X.XX

Power Up Display: Instrument Initialization

DATA MEMORY CHECK

CALIBRATION DATA

AC LINE FREQUENCY

PASS

60 Hz

Page 34 of 85 Operation

PROGRAM Mode Displays

Figure 2-4 illustrates each program mode display for quick reference. The box in the lower left

hand corner denotes the instrument status. For clarity, a green arrow (!) is used to denote

which function key (F1 – F4) is pressed to get to the next display screen.

Figure 2-4: STAND BY & PROGRAM Mode Displays

"STAND BY"

DISPLAY

To enter programming mode.

Display

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.000kV

3.0s

0.500mA

FALL

RAMP

ARC

LOWACSTEP 1/1

To move highlighted box around

display to select parameter to change

To exit programming mode.

To toggle choices of highlighted box.

To change value in highlighted box.

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

FALL

RAMP

ARC

LOWACSTEP 1/1

VOLT

HIGH

TIME

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

I-RUS

FALL

RAMP

ARC

LOWDCSTEP 1/1

VOLT

HIGH

TIME

Display

To select test mode: AC/DC/IR/GC/PA

To view/change preset (initial)

test parameters.

To view/change system parameters:

memory, system, option, calibration, key

lock, password, error, & about.

To view the programmed test setups and

access offset function.

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

FALL

RAMP

HIGHIRSTEP 1/1

VOLT

LOW

TIME

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

LOW

GCSTEP 1/1

CURR

HIGH

DWELL

DOWN

EXIT

RMT ERROFSTLOCKSELECT MODE

PASTEP 1/1

PAUSE

UNDER TEST SIGNAL

To select test mode: AC/DC/IR/GC/PA

Display

To select test mode: AC/DC/IR/GC/PA

OFF

PROGRAM MODE DISPLAYS

0.000kV

0.500mA

3.0s

0.000kV

0.500mA

3.0s

OFF

3.0s

1.0M

Ω

0.000kV

: 0.0A

1.0

Ω

3.0s

OFF

PAUSE MODE

OFFDWELL

DWELL : OFF

Operation Page 35 of 85

2.4 Programming a Ground Continuity Test

This test is applicable to the Sentry 10, 20 and 30 Plus instruments. A Ground Continuity (GC)

test is usually done first to verify the ground connection before high voltage is applied in the AC

& DC Hipot tests. With the instrument in ‘stand-by’ status, press [F1] = PROGRAM. The AC

test mode programming screen is displayed. Follow the green arrows (!) on the right side of

this diagram to program the individual GC test parameters.

Continue on Next Page.

Set

Current

DOWN

EXIT

RMT ERROFSTLOCKSelect Mode

LOWGCSTEP 1/1

CURR:

HIGH:

DWELL:

0.0 A

1.0

Ω

0.3 s

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.1A

LOWGCSTEP 1/1

CURR:

HIGH:

DWELL:

0.0A

1.0

Ω

0.3s

To select Mode = GC

To move highlighted box to CURR.

Set

HIGH

Resistance Limit

To set current to 0.1A

To move highlighted box to HIGH.

OFF

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.1 - 5

Ω

LOWGCSTEP 1/1

CURR:

HIGH:

DWELL:

0.1A

1.0

Ω

0.3s

To set High resistance limit:

0.1 - 5

Ω

in 0.1

Ω

increments.

OFF

Select

Mode

To move highlighted box to DWELL.

In STAND BY:

Press [F1] =

PROGRAM

To move highlighted box to AC.

MORE..

EXIT

RMT ERROFSTLOCKVoltage is 0

FALL

RAMP

ARC

LOWACSTEP:

VOLT:

HIGH:

TIME:

0.000 kV

0.500 mA

3.0 s

OFF

1/1

Page 36 of 85 Operation

Programming a GC Test (continued):

END GC Test Programming. After selecting the LOW resistance limit, one can either press

[F1] = NEW to change the step number in the highlighted box (1-10) and start programming

STEP 2-10 OR one can press [F4] = EXIT to exit programming function and return to STAND

BY status.

For this example, press [F1] = NEW and proceed to program step 2 as an AC Hipot Test (¶ 2.5).

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 5

Ω

LOWGCSTEP 1/1

CURR:

HIGH:

DWELL:

0.1A

1.2

Ω

0.5s

[F1]

: Program Step 2

[F4] : Exit Program Mode

To move highlighted box to STEP.

exit

programming mode and return

to STAND BY status.

OFF

Set

DWELL

Time

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.1 - 1s

LOWGCSTEP 1/1

CURR:

HIGH:

DWELL:

0.1A

1.2

Ω

0.3s

Set

LOW

Resistance Limit

To set Dwell time:

0.1 - 1s in 0.1s increments

OFF:

To move highlighted box to LOW.

To set Low resistance limit:

0 - 5

Ω

in 0.1

Ω

increments.

To go to Step 2.

NEW

MORE..

EXIT

RMT ERROFSTLOCK1 - 10

LOWGCSTEP:

CURR:

HIGH:

DWELL:

0.1A

1.2

Ω

0.5s

0.3

Ω

:1/1

Operation Page 37 of 85

2.5 Programming an AC Hipot Test

This test is applicable to the Sentry 10, 20 and 30 Plus instruments. With the instrument in

‘stand-by’ status, press [F1] = PROGRAM. If continuing the 5-step example from ¶2.4, you are

already in program mode and on the AC test mode page. Follow the green arrows (!) on the

right side of this diagram to program the individual AC hipot test parameters.

Continue on next page.

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.05 - 5kV

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

Select

Test Mode

Set

Test Voltage

Set

High Current

Limit

To set high current limit:

0.001 - 20mA in .001mA increments

To move highlighted box to HIGH.

To move highlighted box to TIME.

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.001 - 20mA

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

INC.

DEC.

EXIT

ENTER

RMT ERROFSTLOCK0, 0.1 - 999s

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 20mA 0 = OFF

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

To set test time:

0, 0.1 - 999s in 0.1s increments

To move highlighted box to LOW.

Set

Test Time

To move highlighted box to ARC.

To set low current limit:

0 - 20mA in 0.01mA increments

To set test voltage:

0.05 - 5kV in .001kV increments

OFF

To move highlighted box to VOLT

Set MODE = AC

DOWN

EXIT

RMT ERROFSTLOCKSelect Mode

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

OFF

[F1] = New

Program

Step 2 = AC

To move highlighted box around

display to select parameter to change

To exit programming mode.

To delete or insert a test step.

To change value in highlighted box.

FIRST

MORE..

EXIT

RMT ERROFSTLOCKVoltage is 0

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

OFF

0.000kV:

0.500mA

3.0s

0.500mA

0.000kV

0.000kV:

: 0.500mA

3.0s

2.750kV

0.500mA

3.0s

15.00mA

2.750kV

Set

Low Current

Limit

2.750kV

10.0s

15.00mA

Test time = 0

then continuous

voltage until STOP

is pressed.

Page 38 of 85 Operation

Programming an AC Hipot Test (continued)

END AC Hipot Test Programming. After selecting the FALL Time, one can either press [F1]

= NEW to change the step number in the highlighted box (1-10) and start programming STEP 3-

10, OR one can press [F4] = EXIT to exit programming function and return to STAND BY

status.

For this example, press [F1] = NEW and proceed to program step 3 as a DC Hipot Test (¶ 2.6).

Set

Arc Limit

Set arc current limit:

1-20mA in 0.1mA increments

To move highlighted box to RAMP.

INC.

DEC.

EXIT

RMT ERROFSTLOCK1 - 20mA 0 = OFF

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

FALL

RAMP

ARC

LOWACSTEP 2/2

VOLT

HIGH

TIME

To set Ramp Time:

0 - 999s in 0.1s increments

To move highlighted box to FALL.

Set

Ramp Time

To move highlighted box to STEP.

To set Fall Time:

0 - 999s in 0.1s increments

Set

Fall Time

NEW

MORE..

EXIT

RMT ERROFSTLOCK1 - 10

FALL

RAMP

ARC

LOWACSTEP

VOLT

HIGH

TIME

2.750kV

To set next test step = 3

3.00mA

OFF

3.00mA

OFF

3.0s

OFF

3.00mA

3.0s

OFF

3.00mA

exit

programming mode and return

to STAND BY status.

2.750kV

15.00mA

10.0s

2.750kV

15.00mA

10.0s

2.750kV

15.00mA

10.0s

15.00mA

2/2

Set

Test Step

[F1]

: Program Step 3

[F4] : Exit Program Mode

Operation Page 39 of 85

2.6 Programming a DC Hipot Test

This test is applicable to the Sentry 20 and 30 Plus instruments. With the instrument in ‘stand-

by’ status, press [F1] = PROGRAM. If continuing the 5-step example from ¶2.5, you are already

in program mode and on the AC test mode page. The example illustrated herein shows a GC test

as Step 1, an AC test as Step 2 and how to program a DC test in Step 3. Follow the green arrows

(!) on the right side of this diagram to program the individual DC hipot test parameters.

Continue on next page.

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.05 - 6kV

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME

Select

Test Mode

Set

Test Voltage

Set

High Current

Limit

To set high current limit:

0.0001 - 5mA in .001mA increments

To move highlighted box to HIGH.

To move highlighted box to TIME.

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.0001 - 5mA

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME

INC.

DEC.

EXIT

ENTER

RMT ERROFSTLOCK0, 0.1 - 999s

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 5mA 0 = OFF

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TEST

To set test time:

0, 0.1 - 999s in 0.1s increments

To move highlighted box to LOW.

Set

Test Time

To move highlighted box to ARC.

To set low current limit:

0 - 5mA in 0.001mA increments

To set test voltage:

0.05 - 6kV in .001kV increments

OFF

To move highlighted box to VOLT

Set MODE = DC

DOWN

EXIT

RMT ERROFSTLOCKSelect Mode

FALL

RAMP

ARC

LOWACSTEP 3/3

VOLT

HIGH

TIME

OFF

[F1] = New

Program

Step 3 = DC

To move highlighted box around

display to select parameter to change

To exit programming mode.

To delete or insert a test step.

To change value in highlighted box.

FIRST

MORE..

EXIT

RMT ERROFSTLOCKVoltage is 0

FALL

RAMP

ARC

LOWACSTEP 3/3

VOLT

HIGH

TIME

OFF

0.000kV:

0.500mA

3.0s

0.500mA

0.000kV

0.000kV:

: 0.500mA

3.0s

2.500kV

0.500mA

3.0s

2.999mA

2.500kV

Set

Low Current

Limit

2.500kV

5.0s

2.999mA

OFF:I-RUS

I-RUS

I-RUS :

: OFFDWELL

DWELL :

OFF

OFFDWELL

DWELL :

OFF

Page 40 of 85 Operation

Programming an DC Hipot Test (Continued)

END DC Hipot Test Programming. After selecting the I-RUSH limit, press [F1] = NEW to change the step

number in the highlighted box (1-10) and start programming STEP 4-10, OR press [F4] = EXIT to exit

programming function and return to STAND BY status.

For this example, press [F1] = NEW and proceed to program step 4 as an IR Test (¶ 2.7).

NOTE: The In-Rush current range is dependent on the programmed High Limit. Refer to Safety Features in the

Specifications section, page 8.

Set

Arc Limit

Set arc current limit:

1-5mA in 0.1mA increments

To move highlighted box to RAMP.

INC.

DEC.

EXIT

RMT ERROFSTLOCK1 - 5mA 0 = OFF

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME

0.015mA

OFF

OFF:

2.500kV

2.999mA

5.0s

:I-RUS OFF

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME To move highlighted box to I-RUS.

To set Fall Time:

0 - 999s in 0.1s increments

Set

Fall Time

NEW

MORE..

EXIT

RMT ERROFSTLOCK1 - 10

FALL

RAMP

ARC

LOWDCSTEP

VOLT

HIGH

TIME

2.500kV

To set next test step = 4

OFF

3.0s

OFF

0.015mA

3.0s

OFF

0.015mA

exit

programming mode and return

to STAND BY status.

5.0s

2.500kV

2.999mA

5.0s

2.999mA

3/3

Set

Test Step

[F1]

: Program Step 4

[F4] : Exit Program Mode

Set

I-Rus Limit

Set in-rush current limit:

0, 0.5uA -5mA

in 0.001mA increments

To move highlighted box to STEP.

INC.

DEC.

EXIT

RMT ERROFSTLOCK0, 0.5uA-5mA 0 = OFF

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME

0.015mA

OFF

3.0s

3.0s:

2.500kV

2.999mA

5.0s

I-RUS

:I-RUS OFF

OFF

I-RUS : OFF

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME

To set Ramp Time:

0 - 999s in 0.1s increments

To move highlighted box to DWELL.

Set

Ramp Time

OFF

0.015mA

2.500kV

2.999mA

5.0s

OFFI-RUS

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

FALL

RAMP

ARC

LOWDCSTEP 3/3

VOLT

HIGH

TIME

To set Dwell Time:

0 - 999s in 0.1s increments

To move highlighted box to FALL.

Set

Dwell Time

OFF

0.015mA

2.500kV

2.999mA

5.0s

OFFI-RUS :

DWELL :

OFF

DWELL

OFF

3.0s

DWELL 3.0s

3.0sDWELL

Operation Page 41 of 85

NOTE: In-Rush Current

The In-Rush current limit for the DC hipot test is a low limit which is monitored during initial charging of the device

under test. When activated (other than Off), current below the programmed value is considered to be a Fail

condition. This current monitoring is generally used to check that the charging current to the device exceeds a

specified value (> programmed limit), thus ensuring that the device is properly connected to the tester.

2.7 Programming an IR (Insulation Resistance) Test

This test is applicable to the Sentry 30 Plus instrument. With the instrument in ‘stand-by’ status,

press [F1] = PROGRAM. If continuing the 5-step example from ¶2.6, you are already in

program mode and on the AC test mode page. This example shows a GC test as Step1, an AC

test as Step 2, a DC test as Step 3 and how to program an IR test in Step 4. Follow the green

arrows (!) on the right side of this diagram to program the individual IR test parameters.

Continue on next page.

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.05 - 1kV

RAMP

HIGHIRSTEP 4/4

VOLT

LOW

TIME

Select

Test Mode

Set

Test Voltage

Set

Low

Resistance

Limit

To set low resistance limit:

0.1M - 50G

Ω

in 0.1M

Ω

increments

To move highlighted box to LOW.

To move highlighted box to TIME.

INC.

DEC.

EXIT

RMT ERROFSTLOCK0.1M

Ω

- 50G

Ω

RAMP

HIGHIRSTEP 4/4

VOLT

LOW

TIME

INC.

DEC.

EXIT

RMT ERROFSTLOCK0, 0.1 - 999s

RAMP

HIGHIRSTEP 4/4

VOLT

LOW

TIME

To set dwell time:

0, 0.1 -999s in 0.1s increments

To move highlighted box to HIGH.

Set

Test Time

To set test voltage:

0.05 - 1kV in 0.001kV increments

OFF

To move highlighted box to VOLT

DOWN

EXIT

RMT ERROFSTLOCKSelect Mode

RAMP

ARC

LOWACSTEP 4/4

VOLT

HIGH

TIME

OFF

[F1] = NEW

Program

Step 4 = IR

To move highlighted box to MODE.

To exit programming mode.

To delete or insert a test step.

To change value of highlighted box.

FIRST

MORE..

EXIT

RMT ERROFSTLOCKVoltage is 0

RAMP

ARC

LOWACSTEP

VOLT

HIGH

TIME

OFF

0.000kV:

3.0s

0.500mA

4/4

0.000kV

0.500mA

3.0s

FALL OFF:

FALL OFF

: 0.000kV

3.0s

1.0M

Ω

OFF

FALL :

: 0.750kV

1.0M

Ω

3.0s

OFFFALL

3.0s

1.5M

Ω

0.750kV

Set MODE = IR

FALL OFF:

DWELL OFF

OFF

DWELL :

OFFDWELL

Page 42 of 85 Operation

Programming an IR (Insulation Resistance) Test (Continued)

END IR Test Programming. After selecting the FALL Time, one can either press [F1] = NEW

to change the step number in the highlighted box (1-10) and start programming STEP 5-10, OR

one can press [F4] = EXIT to exit programming function and return to STAND BY status.

For this example, press [F1] = NEW and proceed to program step 5 as a PAUSE (¶ 2.8).

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 50G

Ω

0 = OFF

RAMP

HIGHIRSTEP 4/4

VOLT

LOW

TIME To move highlighted box to RAMP.

To set high resistance limit:

0 - 50G

Ω

in 0.1M

Ω

increments

(from programmed low limit to 50G

Ω

)

OFF

Set

High

Resistance

Limit

FALL OFF

:0.750kV

1.5M

Ω

5.0s

INC.

DEC.

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

RAMP

HIGHIRSTEP 4/4

VOLT

LOW

TIME

Set

Fall Time

Set

Test Step

To move highlighted box to STEP.

NEW

MORE ..

EXIT

RMT ERROFSTLOCK1 - 10

RAMP

HIGHIRSTEP

VOLT

LOW

TIME

To set fall time:

0 - 999s in 0.1s increments

1.250G

Ω

3.0s

1.250G

Ω

3.0s

:FALL OFF

: 0.750kV

5.0s

1.5M

Ω

3.0sFALL :

: 0.750kV

1.5M

Ω

5.0s

4/4

[F1]

: Program Step 5

[F4] : Exit Program Mode

To set next test step = 5

exit

programming mode and return

to STAND BY status.

Select

Ramp Time

To move highlighted box to DWELL.

DOWN

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

FALL

RAMP

HIGHIRSTEP 4/4

VOLT

LOW

TIME

OFF

1.250G

Ω

0.750kV

1.5M

Ω

5.0s

To set ramp time:

0 - 999s in 0.1s increments

Select

Dwell Time

To move highlighted box to FALL.

DOWN

EXIT

RMT ERROFSTLOCK0 - 999s 0 = OFF

FALL

RAMP

HIGHIRSTEP 4/4

VOLT

LOW

TIME

OFF

1.250G

Ω

:0.750kV

1.5M

Ω

5.0s

To set ramp time:

0 - 999s in 0.1s increments

OFF

DWELL

DWELL :

DWELL

3.0s

3.0s:DWELL

DWELL : 3.0s

Operation Page 43 of 85

2.8 Programming a Pause in Test Sequence

“PAUSE” is a mode selection that allows a test sequence to be stopped while test leads are

changed or other operations performed. A 15-character user programmable message will be

displayed on the screen when in PAUSE mode and the test will continue when the [START]

button is pressed or when START is initiated via remote I/O. The Under Test relay on the

remote I/O can also be cycled during PAUSE if required. During the test sequence when

PAUSE is encountered the tester stops, displays PAUSE and 15-character message until START

button is pressed again (or START is initiated via remote I/O).

This mode is applicable to the Sentry 10, 20 and 30 Plus instruments. With the instrument in

‘stand-by’ status, press [F1] = PROGRAM. If continuing the 5-step example from ¶2.7, you are

already in program mode and on the AC test mode page. This example shows a GC test as

Step1, an AC test as Step 2, a DC test as Step 3, an IR test as Step 4 and finally how to program

a Pause as Step5. Follow the green arrows (!) on the right side of this diagram to program the

individual Pause mode parameters. Enter a message (length 1-15 characters) for the operator.

Continued on Next Page.

Select

Test Mode

To move highlighted box to

PAUSE

DOWN

EXIT

RMT ERROFSTLOCKSelect Mode

RAMP

ARC

LOWACSTEP 5/5

VOLT

HIGH

OFF

[F1] = NEW

Program

Step 5 = PA

To move highlighted box to MODE.

To exit programming mode.

To delete or insert a test step.

To change value of highlighted box.

FIRST

MORE..

EXIT

RMT ERROFSTLOCKVoltage is 0

RAMP

ARC

LOWACSTEP

VOLT

HIGH

TIME

OFF

0.000kV:

3.0s

0.500mA

5/5

0.000kV

0.500mA

FALL OFF:

Set MODE = PA

DOWN

CANCEL

NEXT C.

RMT ERROFSTLOCK1 - 15 CHAR.

PASTEP 5/5

PAUSE

UNDER TEST SIGNAL

Enter

Pause

Message

To enter message:

1 - 15 characters: * + , - . /

0 -9 and A - Z

:PAUSE MODE

OFF

DOWN

CANCEL

RMT ERROFSTLOCK1 - 15 CHAR.

PASTEP 5/5

PAUSE

UNDER TEST SIGNAL

Enter

Pause

Message

To move highlighted box to UNDER.

To move cusor to next character.

:CHANGE-DUT

OFF

To erase message.

FALL OFF:

:TIME 3.0s

Page 44 of 85 Operation

Programming a PAUSE in test sequence (continued):

Set

Test Signal

To set test signal:

OFF or ON

To move highlighted box to STEP.

INC.

DEC.

EXIT

RMT ERROFSTLOCKOFF / ON

PASTEP 5/5

PAUSE

UNDER TEST SIGNAL

INC.

DEC.

EXIT

RMT ERROFSTLOCK1 - 10

PASTEP

PAUSE

UNDER TEST SIGNAL

To set next test step

Exit

Program

Mode

: CHANGE-DUT

OFF

CHANGE-DUT

5/5

exit

programming mode and return

to STAND BY status.

END PA Mode Programming. For the sake of this 5-step example, after selecting the UNDER

TEST SIGNAL ON or OFF, press [F4] = EXIT to exit programming function and return to

STAND BY status.

Operation Page 45 of 85

2.9 Storing a Test Setup

NOTE:

Instrument PRESET values can be programmed and stored for your specific test setup. Therefore

before storing your tests, program the preset values. Refer to p 2.11 for PRESET programming

information.

To store the previous example of the programmed 5-step test, with the instrument in ‘STAND

BY’ status, press [F3] = MENU to access the memory function.

In MENU with the highlighted box around MEMORY, press [F3] = SELECT to enter the

memory function.

Press [F1] = STORE to access the store function. Press [F2] = DOWN to move highlighted box

to the memory location (1-60) in which you wish to store this test setup. Press [F3] = SELECT

to accept location number.

LAST

DOWN

EXIT

SELECT

RMT ERROFSTLOCKSELECT FUNC.

2MEMORY

KEY LOCK

CALIBRATION

OPTION

SYSTEM

To enter programming mode.

To view/change preset (initial) test

parameters.

To view/change system parameters:

memory, system, option, calibration, key

lock, password, error, & about.

To view the programmed test setups and

access offset function.

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGCSTEP 1/5 0.3

Ω

STAND BY

Display

To enter MEMORY function.

Return to STAND BY display.

To toggle through MENU functions.

STORE

RECALL

RETURN

DELETE

RMT ERROFSTLOCKSELECT FUNC.

2(0 STEPS)

(0 STEPS)

To store a test setup in memory

location 1-60

MEMORY

Return to MENU display.

Delete test in highlighted location.

Recall test in highlighted location.

LAST

DOWN

RETURN

SELECT

RMT ERROFSTLOCKSEL. MEMORY

2(0 STEPS)

(0 STEPS)

To move highlighted box to

memory location 60

To select highlighted memory

location and store previously

programmed test setup

Select

LOCATION

To toggle through memory

locations 1-60

Page 46 of 85 Operation

To label the selected location, press [F1] = UP (and/or [F2] = DOWN) to enter a combination

alpha-numeric name for this test setup. Press [F3] = NEXT C. after each digit to accept that digit

and move on to the next. The name can be up to 10 characters long. When finished entering the

name, press [F3] = ENTER two times.

The display will prompt: STORE TO #? Press [F1] = YES to accept storage to that memory

location # or [F2] = NO to reject storage. Press [F4] = RETURN once to return to “MENU”

display. Press [F4] a second time to return to “STAND BY” display.

The MEMORY RECALL and DELETE functions work the same way as STORE. When the

instrument returns to STAND BY status there will be a tag “Mxx” in the upper left hand corner

of the display to indicate which memory location is in use (displayed).

DOWN

CANCEL

NEXT C.

RMT ERROFSTLOCKSELECT FUNC.

2(0 STEPS) _

(0 STEPS)

To enter an alpha-numeric character

LABEL

Test Setup

Accept entered character and move

on to next character

To enter an alpha-numeric character

DOWN

CANCEL

NEXT C.

RMT ERROFSTLOCKSEL. MEMORY

2(0 STEPS)

123

(0 STEPS)

Press 2 Times to exit LABEL

function

Exit

Label

Function

YES

RMT ERROFSTLOCK

2(0 STEPS) 123

(0 STEPS)

STORE TO 1?

Confirm

STORE

Store test setup to location #1

STORE

RECALL

RETURN

DELETE

RMT ERROFSTLOCKSELECT FUNC.

2(5 STEPS) 123

(0 STEPS)

MEMORY

Return to MENU display.

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGC

1/5M01 0.3

Ω

STAND BY

Display with

Memory ID

Operation Page 47 of 85

2.10 Programming a Multi-Step Test

Paragraphs 2.4, 2.5, 2.6, 2.7 and 2.8 illustrate the programming of a 5-step test (GC, AC, DC, IR

& PA). To program a multiple step test, power-up the Sentry Plus Series instrument so the

‘Stand By’ display is shown (Figure 2-2). Press [F1] = PROGRAM and enter the test

parameters for the first test (GC). After specifying LOW resistance limit, press [F3] = NEXT and

[F1] = NEW to enter test parameters for the second test (AC). At this time, do NOT press [F4] =

EXIT because this will exit you from programming mode. After specifying FALL time for the

second test press [F3] = NEXT to continue entering test parameters for the third test (DC).

Continue this process for up to 10 steps. When finished entering desired number of test steps,

press [F4] = EXIT to exit programming mode and return to Stand By status.

In Stand By status, to view the test steps just programmed press [F4] = MORE. Figure 2-4

illustrates the Stand By display and resultant test steps display if the programming example in

paragraphs 2.4-2.8 was followed.

Figure 2-4: View Programmed Test Setups

EXIT

RMT ERROFSTLOCKSTAND BY

OUTPUT

0.1A

2.750kV

2.500kV

1.2

Ω

15.00mA

2.999mA

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGC1/5M01 0.3

Ω

STAND BY

with

Memory ID

Test

Steps

M01

MEASURE RESULT

OFFSET

PA 0.750kV

OFF 1.5M

Ω

------------

Continuing with the 5-step example, press [F4] = MORE to view

the 5 test steps (GC, AC, DC, IR & PA) stored to location 1.

Page 48 of 85 Operation

2.11 PRESET Test Parameters

A number of initial parameters or default conditions may be programmed and stored as the

‘power-up’ conditions. On the Sentry Plus Series instruments, this function is labeled PRESET

and is accessible on the STAND BY display.

The PRESET values are stored with each programmed test. Therefore each memory location

may have different PRESET values. It is important to set the PRESET values prior to storing a

test program.

Table 2-3 lists the Sentry Plus Series PRESET test parameters including parameter range and

initial (default) value.

Table 2-3: PRESET Test Parameters

Parameter Range Initial

(Default)

Value

Description

AC-V FREQ. 50 or 60Hz 60Hz Set frequency for AC Hipot test

SOFT. AGC ON or OFF ON Set software automatic gain control function

ON or OFF

WV AUTO RANGE ON or OFF OFF Set hipot auto range function ON or OFF

IR AUTO RANGE ON or OFF ON Set resistance auto range function ON or OFF

GFI ON or OFF ON Set ground fault interrupt to trip at 0.5mA

FAIL RESTART ON or OFF OFF Fail continue steps

2.11.1 AC-V FREQ.

The AC-V Frequency setting allows the user to select the line frequency for the AC hipot test.

The range of AC-V Freq. is 50 or 60Hz and the instrument default setting is 60Hz.

2.11.2 SOFTWARE AGC

The Software Automatic Gain Control (SOFT AGC) setting allows the option of correcting the

output voltage when ON. This is satisfactory when measuring resistors but under special

circumstances when measuring large capacitive devices it is best to select Software AGC OFF.

The default value is ON.

2.11.3 WV AUTO RANGE

The WV Auto Range setting allows the option of using the full scale current range (ON) or using

the user programmed maximum current limit (OFF) during a withstand voltage (hipot) test. The

low current range (3mA full scale) results in increased measurement resolution. The default

value of WV Auto Range is OFF.

Operation Page 49 of 85

2.11.4 IR AUTO RANGE

The IR Auto Range setting allows the option of using the full scale current range (ON) or using

the user programmed maximum current limit (OFF). To increase measurement resolution in IR

mode, select IR Auto Range ON. To increase measurement speed in IR mode, select IR Auto

Range OFF. The instrument default value for IR Auto Range is ON.

2.11.5 GFI

The Ground Fault Interrupt (GFI) function can be programmed ON or OFF and the instrument

default setting is ON. When GFI is activated, the ground fault interrupt circuit detects leakage

current to ground. If the leakage is >0.5mA, the high voltage will be shut down in less than

0.5ms.

NOTE:

When using the Sentry Plus instrument with the Sentry 50 Ground Bond Tester,

GFI must be turned OFF.

2.11.6 FAIL RESTART

The FAIL RESTART function can be programmed ON or OFF and the instrument default setting

is OFF. When the Fail Restart function is turned ON, the Sentry Plus instrument does not

require the STOP button to be pressed to restart the test. This mode is typically used in

conjunction with the remote I/O connections to automatically restart the test when a failure

occurs. This can be done by connecting one Fail contact (pin 8) to the Start contact (pin 5) and

the other Fail contact (pin 9) to the COM contact (pin 3).

Page 50 of 85 Operation

2.12 Instrument Offset

The Sentry Plus Series instrument provides automatic offset for lead and/or fixture effects.

During the offset process a correction is made (subtracted out) as the result of the measured

current with no DUT attached. For maximum measurement accuracy it is recommended that the

OFFSET function be performed on the Sentry Plus Series instrument after power up, any time

the test parameters are changed and any time the test leads or fixture is changed. Return and HV

test leads should not be connected together (open circuit) for AC and DC hipot tests. Return and

GC test leads should be connected (short circuit) for a GC test. There is no offset in an IR test.

Once the Offset function is turned ON for a specific program, it can be stored in memory with

that program. If the program parameters are changed the offset function will automatically turn

OFF and the offset function will be need to be performed again to get the new offset value. It

will then need to be restored in memory.

Prior to performing the OFFSET function:

•

Allow the instrument to warm up for 15 minutes.

•

Connect the Test cables (or fixture) to the OUTPUT and RTN/LOW connectors.

•

Program the test steps.

With the instrument in STAND BY status:

•

Press [F4] = MORE

•

Press [F3] = OFFSET

•

Follow instructions on display: i.e.: connect OPEN across OUTPUT terminal.

•

Press green [START] button.

•

Wait while instrument gets OFFSET value.

•

The OFST block at the bottom of the display is now highlighted (back lit).

•

Press [F4] = MORE to return to STAND BY status.

•

To undo the OFFSET function:

•

Press [F3] = OFFSET

•

Follow prompt on display: “Turn off the offset function?”

•

Press [F3] = ENTER to turn off OFFSET function.

•

The OFST block at the bottom of the display is not highlighted now.

The following formulas apply to the offset function:

Measured Total Current Offset Total Current

100mA:

Display Current Measured Total Current Offset Total Current-=

Display Current

For Offset Current > 100mA:

For Offset Current

Operation Page 51 of 85

OFFSET Function

There is no offset in the IR or PA modes. Using the pre-programmed example from paragraphs

2.4-2.8 of the GC, AC, DC, IR & PA 5-step test the resultant error and correction is illustrated

herein.

After PASS Screen, press [STOP] and screen reverts to STAND BY display.

Continue on Next Page.

GET

OFFSET

To GET OFFSET values

[F4]

To return to STAND BY status

To enter OFFSET function.

START

MORE..

OFFSET

RMT ERROFSTLOCKSTAND BY

-------------

OUTPUT

2.750kV 15.00mA

2AC

2.500kV

0.750kV 1.5M

Ω

2.999mA

-------------

M01 MEASURE RESULT

0.1A

CHANGE-DUT

1.2

Ω

-------------

CANCEL

PRESS TEST KEY TO GET OFFSET..

RMT ERROFSTLOCK

PLEASE OPEN THE HV

OUTPUT TERMINAL.

NO OFFSET IN IR MODE.

MORE..

PRESS TEST KEY TO CONTINUE..

RMT ERROFSTLOCK

PAUSE: CHANGE-DUT

UNDER TEST SIGNAL: OFF

M01 5/5 PA

U.T.S = OFF

MORE..

RMT ERR

OFST

LOCK

PAUSE: CHANGE-DUT

UNDER TEST SIGNAL: OFF

M01 5/5 PA

PASS

OFFSET

VALUES

MORE..

RMT ERROFSTLOCKU.T.S = OFF

PASS

OUTPUT

2.753kV 0.07mA

2AC

2.499kV

0.750kV 1.5M

Ω

0.002mA PASS

PASS

M01 MEASURE RESULT

0.1A

CHANGE-DUT

0.1

Ω

SKIPPED

"STAND BY"

Display

with

Memory ID

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGCSTEP 1/5

To access OFFSET function.

0.3

Ω

M01 :

START

Page 52 of 85 Operation

Offset (continued)

To turn to Offset function OFF, and return to STAND BY status, follow the screens herein.

End Offset Function.

MORE..

RMT ERROFSTLOCKPASS

-------

OUTPUT

2.753kV 0.07mA

2AC

2.499kV

0.750kV 1.5M

Ω

0.002mA -------

-------

M01 MEASURE RESULT

0.1A

CHANGE-DUT

0.1

Ω

-------

MORE..

OFFSET

RMT ERR

OFST

LOCKPASS

--------

OUTPUT

2.750kV 15.00mA

2AC

2.500kV

0.750kV 1.5M

Ω

2.999mA --------

--------

M01 MEASURE RESULT

0.1A

CHANGE-DUT

1.2

Ω

--------

[F4]

[F3]

CANCEL

RMT ERR

OFST

LOCK

PLEASE OPEN THE H.V.

OUTPUT TERMINAL.

NO OFFSET IN IR MODE.

M01 5/5 PA

OFF

[F4]

-------

Go to STAND BY page

Go to Results page

Turn Offset OFF

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGCSTEP 1/5 0.3

Ω

M01 :

[F4]

5-Steps Programmed

Offset OFF

Ready to Test

PROGRAM

PRESET

MORE..

RMT ERR

OFST

LOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGC1/5 0.3

Ω

M01 :

[F4]

5-Steps Programmed

Offset ON

Ready to Test

Turn select

Offset function

OFFSET

Operation Page 53 of 85

2.13 Connection to Device under Test

Figure 2-5 illustrates the connection of the Sentry Plus Series unit to a single DUT using the S02

1-meter HV cable set that comes standard with the instrument. The custom white banana

plug/red alligator clip is connected between the OUTPUT terminal on the Sentry Plus Series unit

and the high side of the device under test. The black banana plug/alligator clip is connected

between the RTN/LOW terminal on the Sentry Plus Series unit to the low side of the DUT.

DUT

S02

Cable

Set

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

1.250kV

STEP 1/5

STAND BY OFST

0.500mA

3.0s

AC LOW: OFF

ARC: OFF

RAMP: OFF

FALL: OFF

PROGRAM

PRESET

RMT LOCK ERR

MORE..

Figure 2-5: S02 Cable Connection

Refer to paragraphs 3.2 through 3.7 for the description and illustration of the connection of

several QuadTech accessories to the Sentry Plus Series instrument.

Page 54 of 85 Operation

2.14 Measurement Procedure

Before a measurement is made verify the following:

Sentry Plus Series instrument [POWER] ON.

15-minute warm-up.

Test parameters programmed and shown on STAND BY display.

Test cables or fixture connected.

Offset Function initiated.

Device under test connected.

The operator has the option of performing a test at power-up conditions (test conditions at which

the instrument was last powered down) or recalling one of 60 stored test setups. Refer to

paragraphs 2.4 – 2.9 for test programming and storage/recall instructions.

To initiate a test:

•

Press [STOP] to make sure instrument is in STAND BY status.

•

Press [START]. DANGER led flashes. Status window shows UNDER TEST.

•

The test voltage is shut off when all test steps are completed,

•

OR when a test result is judged a FAIL per programmed test limits,

•

OR when the [STOP] button is pressed.

•

Press [STOP] at any time to terminate the output voltage and stop the test.

The Sentry Plus Series instrument judges the measurement value as GOOD or NO GOOD. A

GOOD judgment means the DUT passed all programmed steps. Upon completion of the test the

output voltage is terminated and the display shows PASS. The rear panel PASS signal is

functional and the buzzer sounds (if not turned OFF in SYSTEM parameters under MENU).

If a multiple step test is running and one step in the sequence fails, the Sentry Plus instrument

will not continue with the remaining steps

If the measurement value of the test (or any one step of the test) does not meet programmed

limits, the DUT is judged as NO GOOD, the display will show FAIL and the buzzer will sound

until the [STOP] button is pressed. The [STOP] button may be pressed at any time to terminate

the output voltage and stop the test.

Operation Page 55 of 85

Error Messages (FAIL result)

When the measurement value was judged NO GOOD and FAIL is shown on the display, an error

message denoting the test result will be shown on the display also. Table 2-4 lists the possible

error messages for a NO GOOD/FAIL judgment.

Table 2-4: Error Messages

Error Message Description

HIGH FAIL Measured value (current or resistance) is over the programmed high limit.

LOW FAIL Measured value (current or resistance) is below the programmed low limit.

ARC FAIL Current arc is over the programmed high limit.

I/O FAIL Hardware Current Limit exceeded. Check DUT for short.

VOLTAGE OVER Voltage reading is greater than the hardware allowable # of digits.

CURRENT OVER Current reading is greater than the hardware allowable # of digits.

GFI TRIPPED Ground Fault Interrupt is No Good.

NO OUTPUT Output is too Low. (Try increasing test time)

INRUSH FAIL Charging Current is over limit. (Check test fixture)

MEMORY FULL Greater than 60 tests/slot have been stored.

Page 56 of 85 Operation

2.15 MENU Parameters

With the Sentry Plus Series instrument in STAND BY status, press [F3] = MENU to access

programmable instrument parameters. The MENU display contains the Memory, System,

Option, Calibration, Key Lock, Change Password, Error Log and About functions. Table 2-5

lists these functions with description and default values.

Table 2-5: MENU Parameters

MENU # Parameter Function

1 MEMORY Store, Recall or Delete a test setup from

instrument memory

2 SYSTEM Change display contrast

Change beeper volume

Enable EN 50191 Current limit

Enable DC 50V AGC

3 OPTION Multi-Link function, currently unavailable

4 CALIBRATION Enter instrument calibration routine

Qualified service personnel only.

5 KEY LOCK Lock out front panel program access.

6 CHANGE PASSWORD Change key lock (user) password.

7 ERROR LOG View status of error queue.

8 ABOUT Instrument Information

Manufacturer, software version, etc

Figure 2-6: Menu Display

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGCSTEP 1/5M01 OFF:

STAND BY

EXIT

RMT ERROFSTLOCKSTAND BY

MENU SELECT

MEMORY

SYSTEM

OPTION

CALIBRATION

KEY LOCK

LAST

DOWN

EXIT

RMT ERROFSTLOCKSTAND BY

MENU SELECT

CHANGE PASSWORD

ERROR LOG

ABOUT

MEMORY

SYSTEM

LAST

DOWN

Press F2 = "DOWN" 5 times to

view complete menu choices

Press F3 = "MENU"

To set/change preset parameters

Operation Page 57 of 85

2.15.1 MEMORY

Within the MEMORY function is the ability to STORE, RECALL or DELETE test setups, preset

parameters and offset values. There are 60 memory locations available and a single location may

contain 1-10 steps. The total memory array is 60 and the instrument uses up to 10 locations to

run the test(s). If a 3-step test is programmed then the instrument uses 3 additional steps to run

the test. Therefore five 10-step sequences, fifty-nine 1-step sequences or a combination therein

could be programmed. If more than 50 locations are stored, then the Sentry Plus will prompt

“memory full” when the store function is accessed again.

Figure 2-7: Memory Function

YES

RMT ERROFSTLOCK

2(0 STEPS)

(0 STEPS)

STORE TO 1?

Confirm

STORE

Store test setup to location #1

STORE

RECALL

RETURN

DELETE

RMT ERROFSTLOCKSELECT FUNC.

2(5 STEPS) 123

(0 STEPS)

MEMORY

Return to MENU display.

LAST

DOWN

RETURN

SELECT

RMT ERROFSTLOCKSEL. MEMORY

2(0 STEPS)

(0 STEPS)

To move highlighted box to

memory location 60

To select highlighted memory

location and store previously

programmed test setup

Select

LOCATION

To toggle through memory

locations 1-60

LAST

DOWN

EXIT

SELECT

RMT ERROFSTLOCKSELECT FUNC.

2MEMORY

KEY LOCK

CALIBRATION

OPTION

SYSTEM

To enter MEMORY function.

Return to STAND BY display.

To move to #8, About.

To toggle through MENU functions.

STORE

RECALL

RETURN

DELETE

RMT ERROFSTLOCKSELECT FUNC.

2(0 STEPS)

(0 STEPS)

To store a test setup in memory

location 1-60

MEMORY

Return to MENU display.

Delete test in highlighted location.

Recall test in highlighted location.

DOWN

CANCEL

NEXT C.

RMT ERROFSTLOCKSEL. MEMORY

2(0 STEPS)

123

(0 STEPS)

Press 2 Times to exit LABEL

function

LABEL

Page 58 of 85 Operation

To Recall a Test Setup:

With the Sentry Plus instrument in Stand By status:

Press [F3] = MENU.

Press [F3] = SELECT to select MEMORY from the menu parameters list.

Press [F2] = RECALL to select the recall function.

Press [F1] = LAST or [F2] = DOWN to toggle through the test steps.

When the highlighted box is around the test step you want (3. 3 steps),

Press [F3] = SELECT.

The Sentry Plus instrument will prompt: “Recall From 3?”

Press [F1] = YES to recall the test setup or [F2] = NO to select another test setup.

Press [F4] = RETURN to go back to the MENU display.

Press [F4] = EXIT to return the instrument to STAND BY status.

When the Sentry Plus has Key Lock turned ON, the user has the option to lock out recall or

allow for programs to be recalled. If Recall is allowed when Key Lock is ON, then the Recall

function is accessible from the Stand By Menu. This lets the operator recall a memory location

without having to navigate through the menu system.

To Recall with Key Lock ON in STAND BY status:

Press [F2] = RECALL

Press [F1] = LAST or [F2] = DOWN to toggle through test setups.

When the desired test setup is highlighted (backlit):

Press [F3] = SELECT and you will automatically return to STAND BY status.

To DELETE a Test Setup:

With the Sentry Plus instrument in Stand By status:

Press [F3] = MENU.

Press [F3] = SELECT to select MEMORY from the menu parameters list.

Press [F3] = DELETE to select the delete function.

Press [F1] = LAST or [F2] = DOWN to toggle through the test steps.

When the highlighted box is around the test step you want (3. 3 steps),

Press [F3] = SELECT.

The Sentry Plus instrument will prompt: “Delete From 3?”

Press [F1] = YES to delete the test setup or [F2] = NO to select another test setup.

Press [F4] = RETURN to go back to the MENU display.

Press [F4] = EXIT to return the instrument to STAND BY status.

KEY LOCK

RECALL

MORE..

RMT ERROFST

LOCK

STAND BY

0.1A

0.5s

1.2

Ω

LOWGC1/5M01 0.3

Ω

STAND BY

To change Key Lock Status to OFF

To recall test setup from Memory

Operation Page 59 of 85

2.15.2 SYSTEM

Within the SYSTEM function are four programmable parameters: Contrast, Beeper Volume,

EN50191 and DC 50V AGC. With the instrument in Stand By status, access these system

parameters by pressing [F3] = MENU. Press [F2] = DOWN to move the highlighted box to

SYSTEM.

2.15.2.1 CONTRAST

The CONTRAST parameter adjusts the brightness of the LCD display. The range is 1-15 with

15 being the brightest and 1 being the darkest. The initial default setting is 7.

2.15.2.2 BEEPER VOLUME

The BEEPER VOLUME can be adjusted from L (low) to M (medium) to H (high, loud) or it can

be turned OFF. The initial default setting is H (a loud pitch).

2.15.2.3 EN50191

The EN50191 function sets the maximum leakage current at 3mA AC or 5mA DC in accordance

with the European standard. When EN50191 is ON, the Sentry Plus Series instrument will

terminate the voltage at the output terminals when the leakage current exceeds 3mA AC or 5mA

DC. The EN 50191 function can be set ON or OFF and the initial setting is OFF.

RETURN

RMT ERROFSTLOCK1 - 15

SYSTEM NEXT

2CONTRAST

BUZZER VOLUME

EN 50191

DC 50V AGC

INC.

DEC.

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGCSTEP 1/5M01 0.3

Ω

STAND BY

EXIT

RMT ERROFSTLOCKSELECT FUNC.

MENU SELECT

MEMORY

SYSTEM

OPTION

CALIBRATION

KEY LOCK

LAST

DOWN

Press F2 = "DOWN" to move

highlighted box to SYSTEM

Press F3 = "MENU"

To change instrument parameters

Press F3 = "SELECT" to enter

SYSTEM parameters

OFF

Press F1 = "INC." to increase

brightness of display

Press F2 = "DEC." to decrease

brightness of display

Press F3 = "NEXT" to move

highlighted box to Buzzer Volume

Press F4 = "RETURN" to go back

to MENU display

Page 60 of 85 Operation

EN50191 (The Erection and Operation of Electrical Test Installations) specifies safety guidelines

for both the test equipment and stations used in production lines, laboratories, test houses and

other test environments. The 3mA AC/5mA DC leakage current limit is just one electrical safety

measure in attempting to specify ‘full protection from live parts’ for the operator and the DUT.

2.15.2.4 DC 50V AGC

The Automatic Gain Control (AGC) circuit is used to keep the output signal of a circuit constant

as the amplitude of the input signal varies. So when the DC 50V AGC function is ON, the output

voltage is held constant at 50V for a DC hipot test. The DC 50V AGC function can be set ON or

OFF and the initial default setting is ON. This applies to a programmed voltage of 50V only.

NOTE:

Only in highly specialized applications should the DC 50V AGC function be set to OFF. The default value is ON

because in normal test modes, it is necessary to keep the output signal constant as the amplitude of the input signal

varies to obtain stable results.

2.15.3 OPTION

Within the OPTION function is the multi-link parameter. The multi-link function is not available

in the current software version. This option may be available in future software updates.

2.15.4 CALIBRATION

The CALIBRATION function requires a password to enter the instrument routine. Only

qualified service personnel with NIST traceable standards should perform instrument calibration.

Refer to paragraph 4.3 for the full Sentry Plus Series calibration procedure.

Operation Page 61 of 85

2.15.5 KEY LOCK

To lock out the PROGRAM, PRESET and MENU functions of the Sentry Plus Series instrument

use the KEY LOCK function in the MENU parameters. The initial instrument setting is OFF. To

activate the KEY LOCK function with the instrument in STAND BY status:

•

Press [F3] = MENU

•

Press [F2] = DOWN until KEY LOCK is backlit.

•

Press [F3] = SELECT

•

Display prompts ‘USER PASSWORD’

•

Press [A] [A] [A] [A] [ENTER]

•

NOTE: AAAA is the default password. If password has been changed use the new

password.

RETURN

RMT ERROFSTLOCK1 - 10 CHAR.

KEYLOCK ENTER

KEY LOCK

USER PASSWORD

xxxx

Press F1 = "A" to input password

character

Press F2 = "B" to input password

character

Press F3 = "ENTER" to enter

whole password

Press F4 = "RETURN" to go back

to MENU display

EXIT

RMT ERROFSTLOCKSELECT FUNC.

MENU SELECT

MEMORY

SYSTEM

OPTION

CALIBRATION

KEY LOCK

DOWN

Press F2 = "DOWN" to move

highlighted box to KEY LOCK

Press F3 = "SELECT" to enter

KEY LOCK function

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGCSTEP 1/5M01 0.3

Ω

STAND BY

Press F3 = "MENU"

To change instrument parameters

Page 62 of 85 Operation

KEY LOCK (continued)

•

Display prompts ‘RECALL LOCK?’

•

NOTE: This means: “Do you want to lock out the ability to recall memory locations?”

•

Press [F1] = YES to select KEY LOCK ON.

•

NOTE: Selecting YES disallows the recalling of programmed tests from memory.

•

The LOCK block at bottom of display is backlit.

•

Press [F4] = EXIT to return to STAND BY status.

To disable the KEY LOCK function, repeat above steps (note: there is no confirmation page

“Recall Lock?”).

RMT ERROFSTLOCKYES / NO

KEYLOCK

KEY LOCK ON!

RECALL LOCK?

YES

CANCEL

Press F1 = "YES" to turn ON key

lock function

Press F2 = "NO" to turn OFF key

lock function

Press F4 = "CANCEL" to go back

to MENU display

EXIT

RMT ERROFST

LOCK

SELECT FUNC.

MENU SELECT

MEMORY

SYSTEM

OPTION

CALIBRATION

KEYLOCK

DOWN

Press F4 = "EXIT" to go back to

STAND BY display

KEY LOCK

RECALL

MORE..

RMT ERROFST

LOCK

STAND BY

0.1A

0.5s

1.2

Ω

LOWGC1/5M01 0.3

Ω

STAND BY

To change Key Lock Status to OFF

To recall test setup from Memory

Operation Page 63 of 85

2.15.6 CHANGE PASSWORD

The Sentry Plus Series instruments have a password function for locking out the front panel so

that the instrument PRESET settings and PROGRAM function are disabled. The CHANGE

PASSWORD function applies to the initial instrument password. The password is comprised of

“A” or “B” characters and can be 1-10 characters in length. To activate the CHANGE

PASSWORD function with the instrument in STAND BY status:

•

Press [F3] = MENU

•

Press [F2] = DOWN until CHANGE PASSWORD is backlit.

•

Press [F3] = SELECT

•

Display prompts ‘ USER PASSWORD’

•

Press [A] [A] [A] [A] [ENTER]

RETURN

RMT ERROFSTLOCK1 - 10 CHAR.

PASSWORD ENTER

CHANGE PASSWORD

USER PASSWORD

xxxx

Press F1 = "A" to input password

character

Press F2 = "B" to input password

character

Press F3 = "ENTER" to enter

whole password

Press F4 = "RETURN" to go back

to MENU display

PROGRAM

PRESET

MORE..

RMT ERROFSTLOCKSTAND BY

0.1A

0.5s

1.2

Ω

LOWGCSTEP 1/5M01 0.3

Ω

STAND BY

Press F3 = "MENU"

To change instrument parameters

EXIT

RMT ERROFSTLOCKSELECT FUNC.

MENU SELECT

PASSWORD

ERROR LOG

ABOUT

MEMORY

SYSTEM

DOWN

Press F3 = "SELECT" to enter

PASSWORD function

EXIT

RMT ERROFSTLOCKSELECT FUNC.

MENU SELECT

MEMORY

SYSTEM

OPTION

CALIBRATION

KEYLOCK

DOWN

Press F2 = "DOWN" to move

highlighted box to PASSWORD

Page 64 of 85 Operation

•

Display prompts ‘NEW PASSWORD’

•

Press [B] [B] [B] [B] [ENTER]

•

Display prompts ‘CONFIRM’

•

Press [B] [B] [B] [B] [ENTER]

•

Display prompts ‘CHANGE PASSWORD OK’.

•

Press [F4] = RETURN to exit password function and return to MENU display.

•

Press [F4] = EXIT to go to STAND BY display.

RMT ERROFSTLOCK1 - 10 CHAR.

PASSWORD

CHANGE PASSWORD

NEW PASSWORD

xxxx

ENTER

Press F1 = "A" to input password

character

Press F2 = "B" to input password

character

Press F3 = "ENTER" to enter

whole password

RMT ERROFSTLOCK1 - 10 CHAR.

PASSWORD

CHANGE PASSWORD

CONFIRM

xxxx

ENTER

Press F1 = "A" to input password

character

Press F2 = "B" to input password

character

Press F3 = "ENTER" to enter

whole password

RMT ERROFSTLOCK

PASSWORD CHANGE PASSWORD OK!

RETURN

Press F4 = "RETURN" to go back

to MENU display

Operation Page 65 of 85

2.15.7 ERROR LOG

The Sentry Plus Series instruments have an Error Log to track invalid remote commands. The

remote interface is not available at this time.

2.15.8 ABOUT

The Sentry Plus Series instruments have a parameter labeled ‘About’. This parameter lists the

instrument manufacturer, software version and date. To view the contents of ABOUT with the

instrument in STAND BY status:

•

Press [F3] = MENU

•

Press [F2] = DOWN until ABOUT is backlit.

•

Press [F3] = SELECT

•

Display lists the contents of ABOUT.

Figure 2-8: ABOUT Display

RETURN

RMT ERROFSTLOCKABOUT

Sentry 30 Plus VERSION X.XX

http://www.quadtech.com

QuadTech Inc.

Return to MENU

ABOUT

Display

Interface Page 67 of 85

Section 3: Interface

3.1 Remote

A 9-pin D-Series remote control connector is located on the rear panel of the Sentry Plus Series

instrument. There is a black 5 screw terminal strip for the remote input signals: START,

RESET, COM and INTERLOCK. Inputs require a contact closure. Figure 3-1 illustrates the

Remote terminal strip connector and 9-pin D-Series connector.

Before connecting the instrument to its power source, the interlock function on the rear panel

remote connector (terminal strip) must be properly utilized. This is an important safety feature

for the protection of the operator. When the INTERLOCK jumper is removed, there is no high

voltage at the OUTPUT. Therefore, to initiate a test make sure the interlock jumper is in place.

Figure 3-1: Sentry Plus Series Remote Connectors

The Sentry Plus Series instrument has three output signals on the rear panel. The UNDER TEST

relay is closed during a test. The PASS relay is closed when the DUT is judged GOOD. The

FAIL relay is closed when the DUT is judged NO GOOD. These relays are rated for voltage up

to 115VAC and current <100mA.

5-screw Remote Terminal Strip

9-pin D-Series Remote Connector

INTER

LOCK

COM

START

RESET

START

RESET

UNDER

TEST

FAILPASS

Page 68 of 85 Interface

Figures 3-2 and 3-3 illustrate possible remote control connections to the Sentry Plus Series

terminal strip. Use extreme care when using a remote control connection as the High Voltage

Output is being turned ON and OFF with an external signal.

Figure 3-2: Single Control of START or RESET

Figure 3-3: Continuous Control of RESET

Figure 3-4: Logic Components as Control Circuit

Figure 3-4 illustrates the usage of logic components (transistor, FET or couplers) as a control

circuit. To use this system to control the circuit, the low signal current must be

≤

2mA and the

input signal’s active time must be

20ms. The relay switch in Figure 3-2 or the coupler control

in Figure 3-4 uses the component’s contact for the control action, not both. This can effectively

prevent operation interference however be observant of interference induced by measurement

settings.

START and RESET terminals have unregulated 24VDC present. To initiate a test connect the

START and COM terminals. The input time duration is approximately 20milliseconds. The

above input circuits are not isolated from other internal circuits. To terminate a test connect the

RESET and COM terminals.

INTER

LOCK

COM

START

RESET

INTER

LOCK

COM

START

RESET

INTER

LOCK

COM

START

RESET

START

RESET

COM

Ic'

Photocoupler ON

20ms

Interface Page 69 of 85

Figure 3-5 illustrates the timing diagram for the Sentry Plus Series instruments under a PASS

condition and a FAIL condition.

Figure 3-5: Sentry Plus Series Timing Diagram

OPEN

START

UNDER

TEST

PASS

180ms

0.5ms

180ms

PASS CONDITION FAIL CONDITION

OPEN

FAIL

RESET

0.5ms

OPEN

INTERLOCK

COM

Page 70 of 85 Interface

3.2 G16 International Power Strip

The Sentry Plus Series instruments can be connected to the G16 International Power Strip as

illustrated in Figure 3-6 for safety testing of many European corded products.

*Australia *United Kingdom *Denmark

*North America *Norway *Finland

*Sweden *Germany *Netherlands

*Austria *Switzerland *Italy

Connect the three G-16 ground connectors to the Sentry Plus RTN/LOW terminal.

Note: there is a second RTN/LOW terminal on the rear of the Sentry instrument.

Connect the white banana plug to the Sentry Plus OUTPUT terminal.

Plug DUT’s AC power cord into corresponding module on G16 power strip.

Figure 3-6: G16 International Power Strip Connection to Sentry 30 Plus

G16 International Power Strip

Black

Banana

Plug

RTN

Green

Lug

RTN

Green/

Yellow

Lug

RTN

or RTN

on Rear

Panel

White

Custom

Banana

Plug

OUTPUT

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

QuadTech

AUSTRALIA UNITED KINGDOM DENMARK NORTH AMERICA

NORWAY FINLAND

SWEDEN

SWITZERLAND ITALY

GERMANY

AUSTRIA NETHERLANDS

Sentry 30 Plus Hipot Tester

Interface Page 71 of 85

3.3 S07 Power Entry Adapter Cable

The S07 Power Entry Adapter Cable is a 3-wire AC inlet receptacle for precise testing of corded

products. The S07 cable is connected to the Sentry Plus Series instrument via a two-lead set.

Remove DUT’s power cord form its AC inlet module.

Plug S07 Power entry adapter into DUT’s AC inlet module.

Connect the white custom banana plug to the Sentry Plus OUTPUT terminal. Connect

black banana plug with retaining bracket to the Sentry Plus RTN/LOW terminal.

For GC test, connect GC Lead (700100) to rear Sentry Cont Check terminal and metal on

case of DUT.

Figure 3-7 illustrates this connection of the S07 cable to a Sentry 30 Plus instrument.

Black

Banana

Plug with

Retaining

Bracket

RTN/LOW

Custom

White

Banana

Plug

OUTPUT

S07

Power Entry

Adapter

DUT

(Monitor)

Plug S07 Adapter into

DUT's AC inlet module

Remove DUT's power

cord

from AC inlet module

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

HV OUTPUT

HIGH VOLTAGE

Max 5kVAC/6kVDC

RTN/LOW

CONT. CHECK OPTION

VOLTAGE SELECTOR

POLL UTION DEGRE E 2

INSTALLATION CATEGORY II

WA RNING: F OR CONTINUED P ROTECTION

AGAI NST FI RE HAZARD, REPLAC E ONLY W ITH

THE SAME TYPE AND RATING OF FUSE AS

SPECIFIED FOR THE LINE VOLTAGE BEING

UTILIZED.

CAUTI ON: NO OPE RATOR SERVI CEABL E PARTS

INSIDE. REFER SERVICING TO QUALIFIED

PERS ONNEL.

90V - 110V ~

216V - 250V ~

198V - 242V ~

108V - 132V ~

3.15AT

250V

1.6AT

250V

INTER

LOCK

COM

START

RESE T

100V/120V/220V/240V~

50/60Hz 300W MAX

MODEL NO.

SERIAL NO.

FAN 50

C AUTO ON/OFF

Ground Continuity Connection

REAR Sentry Plus Instrument

Hipot

Connection

Figure 3-7: S07 Power Entry Adapter Cable

Page 72 of 85 Interface

3.4 S03 Corded Product Adapter (115V)

The S03 Corded Product Adapter is a 3-prong electrical outlet box to facilitate testing of corded

products. The S03 cable is connected to the Sentry Plus Series instrument via a two-lead set.

Connect the black banana plug to the Sentry Plus RTN/LOW.

Connect the white banana plug to the Sentry Plus OUTPUT terminal.

Plug the DUT’s 3-wire power cord into the S03 corded product adapter.

For GC test, connect GC Lead (700100) to rear Sentry Cont Check terminal and metal on

case of DUT.

Figure 3-8 illustrates this connection of the S03 cable to a Sentry 30 Plus instrument.

S03 Corded

Product Adapter

Custom

White

Banana

Plug

OUTPUT

Black

Banana

Plug

RTN/LOW

DUT (Monitor)

DUT plugged into

S03 Adapter

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

HV OUTPUT

HIGH VOLTAGE

Max 5kVAC/6kVDC

RTN/LOW

CONT. CHECK OPTION

VOLTAGE SELECTOR

POLLUTION DEGREE 2

INS TALLATI ON CATEGORY II

WA RNING: F OR CONTINUED PROTECTION

AGAINST FIRE HAZARD, REPLACE ONLY WITH

THE SAME TYPE AND RATING OF FUSE AS

SPECIFIED FOR THE LINE VOLTAGE BEING

UTILIZED.

CAUTION: NO OPERATOR SERVICEABLE PARTS

INSIDE. REFER SERVICING TO QUALIFIED

PERSONNEL.

90V - 110V ~

216V - 250V ~

198V - 242V ~

108V - 132V ~

3.15AT

250V

1.6AT

250V

INTER

LOCK

COM

START

RESET

100V/120V/220V/240V~

50/60Hz 300W MAX

MODEL NO.

SERIAL NO.

FAN 50

C AUTO ON/OFF

Hipot

Connection

Ground Continuity Connection

DO NOT TOUCH WHILE UNDER TEST

QuadTech

MAX. VOLTAGE

5kVAC

6kVDC

20A 125V

Figure 3-8: S03 Corded Product Adapter

Interface Page 73 of 85

3.5 S05 Foot Switch

The S05 Foot Switch provides hands-free remote testing capability. The spade leads on the S05

Foot Switch are connected (screwed) to the terminal strip on the rear panel of the Sentry Plus

Series instrument.

Connect (screw) the white wire/spade connector to the START terminal.

Connect (screw) the red wire/spade connector to the COM terminal.

Figure 3-9 illustrates this connection of the S05 Foot Switch to a Sentry 30 Plus instrument.

S05 Foot Switch

White

Wire &

Spade

Terminal

Strip:

START

Red

Wire &

Spade

Terminal

Strip:

COM

Terminal Strip rear of Sentry 30 Plus

HV OUTPUT

HIGH VOLTAGE

Max 5kVAC/6kVDC

RTN/LOW

CONT. CHECK OPTION

VOLTAGE SELECTOR

POLLUTION DEGREE 2

INSTA LLATI ON CATEGORY I I

WARNI NG: FOR C ONTINUED P ROTECTION

AGAINST FIRE HAZARD, REPLACE ONLY WITH

THE SAME TYPE AND RATING OF FUSE AS

SPECIFIED FOR THE LINE VOLTAGE BEING

UTILIZED.

CAUTION: NO OPERATOR SERVICEABLE PARTS

INSIDE. REFER SERVICING TO QUALIFIED

PERSONNE L.

90V - 110V ~

216V - 250V ~

198V - 242V ~

108V - 132V ~

3.15AT

250V

1.6AT

250V

INTER

LOCK

COM

START

RESET

100V/120V/220V/240V~

50/60Hz 300W MAX

MODEL NO.

SERIAL NO.

FAN 50

C AUTO ON/OFF

Figure 3-9: S05 Foot Switch

Page 74 of 85 Interface

3.6 S08 Gun Probe

The S08 Gun Probe provides fast testing capability with pinpoint control. Use the black lead of

the S02 Lead Set with the S08 Gun Probe.

Connect the S02 black banana plug to the Sentry Plus RTN/LOW terminal.

Connect the S02 black alligator clip to the low side of the DUT.

Connect the white banana plug to the Sentry Plus OUTPUT terminal.

Figure 3-10 illustrates this connection of the S08 probe to a Sentry 30 Plus unit.

S08

GUN PROBE

Custom

White

Banana

Plug

OUTPUT

++++

----

Rack

DUTs

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

Use S02 Lead:

Black Banana Plug

to RTN/LOW

Figure 3-10: S08 Gun Probe connected to Sentry 30 Plus Hipot Tester

Interface Page 75 of 85

3.7 S50 Plus Ground Bond Tester

The Sentry Plus Series instrument can be connected to the Sentry 50 Plus Ground Bond Tester

for high current ground testing between chassis and power cord ground. The output current is

programmable from 1A to 30A AC in 0.01A increments and resistance can be measured over the

range 0.1m

Ω

to 510m

Ω

. The rear panels of the Sentry Plus Series instrument and Sentry 50 Plus

instrument are connected via the S15 9-pin interconnection cable. Figure 3-11 illustrates the

front panel connections of the two instruments. NOTE: GFI must be turned OFF on the Sentry

Plus unit when it is used with the Sentry 50 Plus instrument.

Banana/Banana CableSentry 30 Plus AC/DC/IR Hipot Tester

S50 Plus Ground Bond Tester

RTN/LOW

OUTPUT

DANGERPASS FAIL

START

STOP

Sentry 30 Plus AC/DC/IR Hipot Tester

uadTech

CAUTION

Max 5kVAC

6kVDC

CAL UPDATE

RTN/LOW

DANGER

PASS FAIL

START

STOP

Sentry 50 Plus GROUND BOND TESTER

HIGH

CURRENT

uadTech

DRIVE SENSESENSE

G15

Banana to

Alligator

Cable

DUT

(Monitor) G13

Corded

Product

Adaptor

DO NOT TOUCH WHILE

UNDER TEST

QuadTech

MAX.

VOLTAGE

5kVAC

6kVDC

20A 125

DUT

plugged into

G13

Figure 3-11: Guardian 1030S & Sentry 50 Plus Connection

Service & Calibration Page 77 of 85

Section 4: Service & Calibration

4.1 General

Our warranty (at the front of this manual) attests to the quality of materials and workmanship in

out products. If malfunction should be suspected, or other information desired, applications

engineers are available for technical assistance. Applications assistance is available in the U.S.

by calling (978) 461-2100 and asking for Applications Support. For support outside of the

United States please contact your local QuadTech Distributor. Service/Calibration and

Distributor information is also available online.

4.2 Instrument Return

Before returning an instrument to QuadTech for service please call our Customer Care Center

(CCC) at 800-253-1230 for Return Material Authorization (RMA). It will be necessary to

include a Purchase Order Number to insure expedient processing, although units found to be in

warranty will be repaired at no-charge. For any questions on repair costs or shipping instructions

please contact our CCC Department at the afore-mentioned number. To safeguard an instrument

during storage and shipping, please use packaging that is adequate to protect it from damage, i.e.

equivalent to the original packaging, and mark the box “Delicate Electronic Instrument”. Return

material should be sent freight prepaid to:

QuadTech, Inc.

5 Clock Tower Place, 210 East

Maynard, Massachusetts 01754

Attention: RMA#

Shipments sent collect cannot be accepted.

4.3 Calibration

Calibration of the Sentry Plus Series instruments is recommended on an annual basis. If the unit

is returned to QuadTech for factory calibration, refer to paragraph 4.2 for RMA and shipping

instructions. Using the calibration procedure in paragraph 4.3.1, the Sentry Plus Series

instrument may be calibrated by a qualified service person IF traceable calibration equipment

and standards are available. The instrument should be powered up for a minimum of 30

minutes prior to calibration to ensure maximum stability.

Page 78 of 85 Service & Calibration

Table 4-1: Calibration Equipment

Equipment Requirements Equipment Requirements

AC/DC High Voltage Voltmeter Measure: 0 to 6kV, 0.1% accuracy 250kΩ Res. Std 1200V, 5mA, 5W; 1250V 7mA

AC/DC Current Meter Measure: 0 to 40mA, 0.1% accuracy 100kΩ Res. Std 400V, 4mA, 50W; 1200V 12mA

1GΩ Resistance Standard 250V 80kΩ Res. Std 1200V, 15mA, 100W

100MΩ Resistance Standard 500V 1Ω Resistor 0.1A

10MΩ Resistance Standard 1200V, 0.12mA, 0.25W; 500V; 1kV 3Ω Resistor 0.1A

500kΩ Resistance Standard 1200V, 2.4mA, 0.25W

4.3.1 Calibration Parameters

Table 4-2 contains the calibration parameters for the Sentry Plus Series instruments. All tests

points are not required for each of the instruments (10 Plus, 20 Plus & 30 Plus).

Table 4-2: Calibration Parameters

PRODUCT TEST RANGE CAL. POINT

Voltage Calibration

10/20/30 CAL ACV 5kV OFST 0.050kV

10/20/30 CAL ACV 5kV FULL 4.000kV

20/30 CAL DCV 6kV OFST 0.050kV

20/30 CAL DCV 6kV FULL 4.000kV

30 CAL IR 1kV OFST 0.050kV

30 CAL IR 1kV FULL 1.000kV

Current Calibration

10/20/30 CAL ACA 3mA OFST 0.12mA / 10MΩ

10/20/30 CAL ACA 3mA FULL 2.4mA / 500kΩ

10/20/30 CAL ACA 15mA OFST 2.4mA / 500kΩ

10/20/30 CAL ACA 15mA FULL 12mA / 100kΩ

20/30 CAL DCA 3mA OFST 0.12mA / 10MΩ

20/30 CAL DCA 3mA FULL 2.4mA / 500kΩ

20/30 CAL DCA 5mA OFST

2.4mA / 500kΩ

20/30 CAL DCA 5mA FULL

4.8mA / 250kΩ

WAC & WDC Arcing Calibration

10/20/30 CAL AC ARC 15mA Arc 7.00mA

20/30 CAL DC ARC 5mA Arc 5.00mA

IR Resistance Calibration

30 CAL IRR Range1

1000MΩ Range 1 1000M = 1.00GΩ

30 CAL IRR Range2

100MΩ Range 2 100.0MΩ

30 CAL IRR Range3

10MΩ Range 3 10.0MΩ

30 CAL IRR Range4

10MΩ Range 4 10.0MΩ

Ground Continuity Calibration

10/20/30 CAL GC 1Ω OFST 1Ω

10/20/30 CAL GC 3Ω FULL 3Ω

Contrast Calibration

10/20/30 CAL CONTRAST 11 11 13

Service & Calibration Page 79 of 85

4.3.2 Enable Calibration

The instrument should be powered up for a minimum of 30 minutes prior to calibration to

ensure maximum stability. With the Sentry Plus Series instrument in standby status ([STOP]

button previously pressed and no warning lights flashing) remove the Calibration seal over the

hole labeled “CAL’ on the front panel and push the recessed switch to the IN position.

The unit is in STAND BY status.

Press [F3] = MENU.

Press [F2] = DOWN three times until CALIBRATION is highlighted (backlit).

Press [F3] = SELECT to choose calibration function.

Display will prompt for a password.

Press [A] [A] [A] [B] [ENTER]

Cal Step 1: ‘ACV 5kV Offset (50V)’ is displayed on the screen.

NOTE

The ‘Calibration is OFF’ display may occur if the CAL recessed switch has not been pressed IN

prior to entering Calibration function.

Figure 4-1: Calibration Password Prompt

NOTE:

When in the Calibration Routine:

Pressing [UP] or [DOWN] scrolls through the calibration steps.

Pressing [START] initiates the calibration of the particular step

Pressing [INC.] or [DEC.] adjusts the Standard Value

Pressing [ENTER] accepts the calibration value.

Pressing [STOP] completes calibration of the particular step.

Page 80 of 85 Service & Calibration

4.3.3 AC Voltage Calibration

Connect the OUTPUT terminal of the Sentry Plus Series unit to the input terminal of the AC/DC

high voltage meter. Connect the RTN/LOW terminal of the Sentry Plus to the GND terminal of

the voltmeter. Set the voltmeter to AC and 2kV range.

Cal Step 1: ‘ACV 5kV Offset (50V)’

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “ACV Offset” display (incorporating new cal value).

Press [F1] = UP to go to Cal Step 2: ‘ACV 5kV Full (4kV)’. Change voltmeter range to 20kV.

Press [STOP] to return instrument to steady state.

Press [START] to get full value

Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “ACV Full” display (incorporating new cal value).

4.3.4 DC Voltage Calibration (DCV)

Change the setting on the Valhalla voltmeter to DC and 2kV range. DC calibration is applicable

to the Sentry 20 Plus and Sentry 30 Plus instruments.

Press [F1] = UP to go to Cal Step 3: ‘DCV 6kV Offset (50V)’.

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “DCV Offset” display (incorporating new cal value).

Press [F1] = UP to go to Cal Step 4: ‘DCV 6kV Full (4kV)’. Change voltmeter range to 20kV.

Press [STOP] to return instrument to steady state.

Press [START] to get full value.

Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “DCV Full” display (incorporating new cal value).

Service & Calibration Page 81 of 85

4.3.5 IR Voltage Calibration (IRV)

Keep the setting on the Valhalla voltmeter at DC and 2kV range. IR calibration is applicable to

the Sentry 30 Plus instrument.

Press [F1] = UP to go to Cal Step 5: ‘IRV 1kV Offset (50V)’.

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “IRV Offset” display (incorporating new cal value).

Press [F1] = UP to go to Cal Step 6: ‘IRV 1kV Full (1kV)’. Change voltmeter range to 20kV.

Press [STOP] to return instrument to steady state.

Press [START] to get full value.

Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “IRV Full” display (incorporating new cal value).

Page 82 of 85 Service & Calibration

4.3.6 AC Current Calibration (ACA)

Connect the OUTPUT terminal of the Sentry Plus Series instrument to a resistance box or

resistance standard. Connect an AC/DC current meter in series between the resistance load

(box/standard) and the RTN/LOW terminal of the Sentry Plus instrument. Table 4-3 lists the

resistance loads necessary for the current calibration steps.

Table 4-3: Resistance Loads

Mode Step # Voltage Calibration

Point Resistance

(Load)

ACA CAL 7 1200 V 0.12mA 10MΩ

ACA CAL 8 1200 V 2.4mA full 500kΩ

ACA CAL9 1200 V 2.4mA 500kΩ

ACA CAL 10 1200 V 12mA 100kΩ

DCA CAL 11 1200 V 0.12mA 10MΩ

DCA CAL 12 1200 V 2.4mA full 500kΩ

DCA CAL 13 1200 V 2.4mA 500kΩ

DCA CAL 14 1200 V 4.8mA 250kΩ

Press [F1] = UP to go to Cal Step 7: ‘ACA 3mA Offset (0.12mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “ACA 3mA Offset” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 8: ‘ACA 3mA Full (2.4mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get full value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “ACA 3mA Full” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 9: ‘ACA 15mA Offset (2.4mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “ACA 30mA Offset” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 10: ‘ACA 15mA Full (12mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get full value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “ACA 30mA Full” display (incorporating the new cal value).

Service & Calibration Page 83 of 85

4.3.7 DC Current Calibration

Connect the OUTPUT terminal of the Sentry Plus Series instrument to a resistance box or

resistance standard. Connect an AC/DC current meter in series between the resistance load

(box/standard) and the RTN/LOW terminal of the Sentry Plus instrument.

Press [F1] = UP to go to Cal Step 11: ‘DCA 3mA Offset (0.12mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “DCA 3mA Offset” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 12: ‘DCA 3mA Full (2.5mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get full value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “DCA 3mA Full” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 13: ‘DCA 5mA Offset (2.4mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “DCA 15mA Offset” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 14: ‘DCA 5mA Full (4.8mA)’.

Press [STOP] to return instrument to steady state.

Press [START] to get full value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.

Press [ENTER] to accept reading.

Sentry Plus reverts to “DCA 15mA Full” display (incorporating the new cal value).

Page 84 of 85 Service & Calibration

4.3.8 ARC Calibration

ARC calibration is part of the calibration routine but it is not performed on the Sentry Plus

instruments. ARC Calibration is set at the factory. To by-pass these two steps:

Press [F1] = UP to go to Cal Step 15: ‘AC ARC 15mA (7mA)’. BY-PASS

Press [F1] = UP to go to Cal Step 16: ‘DC ARC 5mA (5mA)’. BY-PASS

4.3.9 IR Resistor Calibration (IRR)

Connect the resistance load (per Table 4-2) between the Sentry Plus instrument’s OUTPUT

terminal and RTN/LOW terminal.

Press [F1] = UP to go to Cal Step 17: ‘IRR Range1 (1G

Ω

)’.

Press [STOP] to return instrument to steady state.

Press [START] to get range1 value.

Press [F1] = INC or [F2] = DEC until the Splus display reads the same as certified load value.

Press [ENTER] to accept reading.

Sentry Plus reverts to “IRR Range1” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 18: ‘IRR Range2 (100M

Ω

)’.

Press [STOP] to return instrument to steady state.

Press [START] to get range2 value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as certified load value.

Press [ENTER] to accept reading.

Sentry Plus reverts to “IRR Range2” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 19: ‘IRR Range3 (10M

Ω

)’.

Press [STOP] to return instrument to steady state.

Press [START] to get range3 value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as certified load value.

Press [ENTER] to accept reading.

Sentry Plus reverts to “IRR Range3” display (incorporating the new cal value).

Press [F1] = UP to go to Cal Step 20: ‘IRR Range4 (10M

Ω

)’.

Press [STOP] to return instrument to steady state.

Press [START] to get range4 value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as certified load value.

Press [ENTER] to accept reading.

Sentry Plus reverts to “IRR Range4” display (incorporating the new cal value).

Service & Calibration Page 85 of 85

4.3.10 Ground Continuity Calibration

GC 5

Ω

ΩΩ

Ω

Offset (1

Ω

ΩΩ

Ω

)

Connect a 1

Ω

load resistor between the Sentry Plus instrument’s rear panel RTN/LOW terminal

and Ground Continuity Option terminal.

Press [F1] = UP to go to Cal Step 21: ‘GC 5

Ω

Offset (1

Ω

)’.

Press [STOP] to return instrument to steady state.

Press [START] to get offset value.

Press [F1] = INC or [F2] = DEC until the Splus display reads the same as certified load value.

Press [ENTER] to accept reading.

Sentry Plus reverts to “GC 5

Ω

Offset” display (incorporating the new cal value).

GC 5

Ω

ΩΩ

Ω

Full (3

Ω

ΩΩ

Ω

)

Connect a 3

Ω

load resistor between the Sentry Plus instrument’s rear panel RTN/LOW terminal

and Ground Continuity Option terminal.

Press [F1] = UP to go to Cal Step 22: ‘GC 5

Ω

Full (3

Ω

)’.

Press [STOP] to return instrument to steady state.

Press [START] to get full value.

Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as certified load value.

Press [ENTER] to accept reading.

Sentry Plus reverts to “GC 5

Ω

Full” display (incorporating the new cal value).

4.3.11 Contrast Calibration

This calibration step is by-passed. If setup is selected, the display contrast will be set to a level

of 7. Display contrast can be adjusted as specified in paragraph 2.15.2.1.

4.3.12 Finalize Calibration

When all calibration steps are complete:

Press [F4] = EXIT

Release the [CAL] enable switch to the OUT position using the tip of a small screwdriver.

1. Press [F2] = DOWN three times.

2. Press [F3] = SELECT

3. Display prompts: ‘PASSWORD’.

4. Press [A] [A] [A] [A] [ENTER]

5. Display prompts: ‘Select Software Calibration?’

6. Press [F1] = ON to set Calibration Values ON.

QUADTECH/QUADTECH Sentry 10, 20, 30 Plus Instruction QUADTECH

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