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UltraTEV Plus2 Operating Manual

Product Code: UTP2

Version: 5

Date: October 2016

EA Technology UltraTEV Plus2 Operating Manual    2388L015 
   
Contents 
FCC Warning Statement ........................................................................................................................................................... 1 
IC Warning Statement ............................................................................................................................................................... 1 
What does the UltraTEV Plus² do? ...................................................................................................................... 2 
What’s in the Box? ........................................................................................................................................................ 3 
Important Information .............................................................................................................................................. 4 
Non-Intrusive Detection of Partial Discharge Activity ........................................................................... 5 
1 What is Partial Discharge? ................................................................................................. 5 
2 How can Partial Discharge be detected? .......................................................................... 5 
3 Airborne Ultrasonic Discharge Activity ............................................................................ 5 
4 Electromagnetic Discharge Activity .................................................................................. 6 
5 Cable Partial Discharge Activity ........................................................................................ 6 
Using the UltraTEV Plus² .......................................................................................................................................... 7 
1 Charging the UltraTEV Plus2 .............................................................................................. 8 
2 Turning the UltraTEV Plus² On/Off ................................................................................... 8 
3 Notification Bar .................................................................................................................. 9 
3.1 Temperature & Humidity ..................................................................................... 10 
4 Menu Bar ........................................................................................................................... 10 
5 Main Menu ........................................................................................................................ 11 
6 TEV/Cable PD Menu ......................................................................................................... 12 
6.1 Measure Screen .................................................................................................... 13 
6.2 Phase Plot ............................................................................................................. 14 
6.3 Waveform .............................................................................................................. 15 
6.4 Histogram ............................................................................................................. 16 
6.5 Interpretation ....................................................................................................... 17 
6.6 Noise Detection .................................................................................................... 19 
7 Ultrasonic Screen ............................................................................................................. 20 
7.1 Ultrasonic classification ....................................................................................... 21 
8 Context Menu ................................................................................................................... 22 
8.1 Audio output ........................................................................................................ 22 
8.2 Filters .................................................................................................................... 23 
8.3 Phase Reference ................................................................................................... 23 
9 Settings Screen................................................................................................................. 25 
9.1 System Settings .................................................................................................... 25 
9.2 Measurement Settings ......................................................................................... 27 
9.3 Network Settings .................................................................................................. 28 
9.4 About .................................................................................................................... 29 
9.5 In-field Firmware Upgrade ................................................................................... 29 
9.6 Reset All Settings ................................................................................................. 31 
10 File Browser ...................................................................................................................... 32 
11 Screenshot ........................................................................................................................ 33 
12 Function Check ................................................................................................................ 34 
Survey ............................................................................................................................................................................... 35 
1 Starting a Survey .............................................................................................................. 35 
2 Ad-hoc Measurement ....................................................................................................... 36 
3 Survey Metadata Forms ................................................................................................... 36 
4 Using Populated Lists ...................................................................................................... 38 

EA Technology UltraTEV Plus2 Operating Manual    2388L015 
   
5 Using the virtual keyboard .............................................................................................. 39 
6 Background Measurements ............................................................................................. 40 
7 Recording Data ................................................................................................................ 41 
7.1 TEV recorded data ................................................................................................ 41 
7.2 Cable PD recorded data ....................................................................................... 41 
7.3 Ultrasonic recorded data ..................................................................................... 41 
8 Viewing Survey Progress ................................................................................................. 42 
9 Completing a Survey ........................................................................................................ 42 
Reviewing Results ..................................................................................................................................................... 43 
1 Wi-Fi & USB Connection ................................................................................................... 43 
2 MicroSD Card & Data Zip Files ........................................................................................ 43 
3 Data Analysis Screens ...................................................................................................... 44 
3.1 TEV & Cable PD Analysis Screen ......................................................................... 45 
3.2 Ultrasonic Analysis ............................................................................................... 46 
Detecting Partial Discharge using the UltraTEV Plus² ........................................................................ 47 
1 TEV Measurement ............................................................................................................ 47 
1.1 Background Noise ................................................................................................ 47 
1.2 Measuring TEV ..................................................................................................... 48 
2 Cable PD Measurement ................................................................................................... 49 
2.1 Practical RFCT Connection Requirements .......................................................... 49 
2.2 Measuring PD in cables ....................................................................................... 49 
3 Ultrasonic Measurement ................................................................................................. 50 
3.1 Measuring Ultrasonic ........................................................................................... 50 
3.2 Measuring Ultrasonic with the UltraDish Accessory .......................................... 50 
3.3 Measuring Ultrasonic using the Flexi Probe sensor Accessory ........................ 52 
3.4 Ultrasonic Measurement using the Contact Probe Accessory .......................... 53 
3.5 Using the Ultrasonic Contact Probe .................................................................... 54 
3.6 Detection, Measurement and Localisation of the Partial Discharge ................ 55 
3.7 Mounting Practices .............................................................................................. 55 
3.8 Sources of Noise and Phantom Signals .............................................................. 57 
UltraTEV Plus² Specification ............................................................................................................................... 58 
TEV Measurements .......................................................................................................... 58 
Ultrasonic Measurements ................................................................................................ 58 
Cable PD Measurements .................................................................................................. 58 
Hardware .......................................................................................................................... 59 
Environmental .................................................................................................................. 59 
Dimensions ...................................................................................................................... 59 
Power Supplies ................................................................................................................. 59 
Battery Charger ................................................................................................................ 60 
Declaration of Conformity ................................................................................................................................... 61 
Maintenance ................................................................................................................................................................. 62 
Warranty Policy ........................................................................................................................................................... 62 
Calibration ..................................................................................................................................................................... 63 
Repair ............................................................................................................................................................................... 63 
Waste Electrical and Electronic Equipment Directive (WEEE) .......................................................... 63 
Continuous Improvement .................................................................................................................................... 63 
Contact Us ..................................................................................................................................................................... 64 
Record of Changes ................................................................................................................................................... 65 
 
 

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FCC Warning Statement

 This device complies with Part 15 of the FCC Rules.

Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and

(2) This device must accept any interference received, including interference that

may cause undesired operation.

 This equipment complies with FCC radiation exposure limits set forth for an

uncontrolled environment. End users must follow the specific operating instructions for

satisfying RF exposure compliance. This transmitter must not be co-located or operating

in conjunction with any other antenna or transmitter.

 Changes or modifications not expressly approved by the party responsible for

compliance could void the user's authority to operate the equipment

IC Warning Statement

Under Industry Canada regulations, this radio transmitter may only operate using an

antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry

Canada.

To reduce potential radio interference to other users, the antenna type and its gain

should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more

than that necessary for successful communication.

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is

subject to the following two conditions: (1) this device may not cause interference, and (2)

this device must accept any interference, including interference that may cause undesired

operation of the device.

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1. What does the UltraTEV Plus² do?

The UltraTEV Plus² is a versatile hand-held tool used to easily detect and classify Partial

Discharge (PD) in a wide range of electrical equipment.

The UltraTEV Plus² uses inbuilt TEV and Ultrasonic sensors and external accessories to

detect the presence of potentially damaging PD in switchgear, cables and overhead line

equipment.

The UltraTEV Plus² brings together three complementary sensor modes in a single hand

held instrument by regularly checking switchgear while it’s in service using the UltraTEV

Plus2, failure risks can be identified and action taken to avoid faults and downtime.

Algorithms and analysis capability built in to the UltraTEV Plus² provide vital insight,

classifying what you find to support the decisions you make and deliver the outcomes you

need. It’s never been simpler to interpret what you’re seeing and choose a course of action.

The UltraTEV Plus² records measurements at the touch of a button. Internal storage can be

used to provide access to historical data while you’re out in the field. Capturing what you’ve

measured allows you to see trends in the performance of your network.

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2. What’s in the Box?

Part

Kit 1

Kit 2

Kit 3

Kit 2

Upgrade

Kit 3

Upgrade

UltraTEV Plus2

Mains

Charger

Car Charger

USB Lead

8GB MicroSD

& SD adapter

Neckband

Headphones

Ultrasonic

Contact Probe

Flexible

Microphone

Sensor

UltraDish

RFCT & Cable

Temperature

& Humidity

Sensor

Tough Carry

Case

X (T-Loc II)

X (T-Loc IV)

X (T-Loc II)

X (T-Loc IV)

For Spares and Accessories

For spares and accessories, please contact your local sales representative

or sales@eatechnology.com

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3. Important Information

 The UltraTEV Plus2 is designed for use at ground potential only.

 When testing electrical plant ensure that the metalwork is earthed

before taking any measurements.

 Maintain safety clearances between structures at high voltage and

the instrument, its probes and the operator at all times.

 RFCTs, connecting leads and test equipment do not provide

protection against high voltage.

 Under no circumstances are earth/ground connections to be

loosened, disconnected or otherwise altered to allow use of this

equipment.

 Adhere strictly to local safety procedures.

 Do not make measurements when there are electrical storms in the

vicinity.

 Do not make measurements immediately following the energisation

of a circuit.

 Do not disturb plant during measurements either mechanically (e.g.

by shaking or striking it), electrically (e.g. by increasing the voltage)

or physically (e.g. by applying heat).

 Do not operate the instrument or its accessories in an explosive

atmosphere.

 Mains supply voltages are present within the battery charger.

 This unit contains no user serviceable parts, always return to EA

Technology or your local distributor for service and repair.

 Care must be taken where work is performed in tight corners, where

the proximity of other earth planes will affect the reading. If

possible maintain a distance of more than 30cm from metal work

which runs perpendicular to the sensor faceplate.

For application information please contact:

product-support@eatechnology.com

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4. Non-Intrusive Detection of Partial Discharge

Activity

4.1 What is Partial Discharge?

Partial discharges are electrical discharges that do not completely bridge the insulation

between electrodes. The magnitude of these discharges is usually small, however they

cause progressive deterioration of insulation that may eventually lead to failure.

Non-intrusive partial discharge detection provides a means for identifying these potential

sources of insulation failure. If not detected the discharge may result in failure causing not

only in loss of supply to customers and damage to plant but could also endanger staff.

4.2 How can Partial Discharge be detected?

A partial discharge emits energy in various ways and produces a number of effects which

can be detected:

Electromagnetic:

 Radio

 Light

 Heat

Acoustic:

 Audio

 Ultrasonic

Gases:

 Ozone

 Nitrous oxides

The most practical techniques for non-intrusive testing are based on the detection of the

radio frequency part of the electromagnetic spectrum and ultrasonic emissions. The

UltraTEV Plus2 has specifically been developed to enable electromagnetic and ultrasonic

activity to be detected in a single simple to use instrument.

4.3 Airborne Ultrasonic Discharge Activity

Acoustic emissions from partial discharge activity occur over the whole acoustic spectrum.

Audible detection is possible but depends on the hearing ability of the individual. Using

an instrument to detect the ultrasonic part of the acoustic spectrum has several

advantages; instruments are more sensitive than the human ear, are not operator

dependent and are more directional when operating above the audible frequency.

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The most sensitive method of detection is using an airborne ultrasonic Microphone centred

at 40 kHz. This method is very successful at detecting partial discharge activity provided

there is an air passage between the source and the Microphone.

4.4 Electromagnetic Discharge Activity

When partial discharge activity occurs within high voltage switchgear, it generates

electromagnetic waves in the radio frequency range which can only escape from the inside

of the switchgear through openings in the metal casing. These openings may be air gaps

around covers, or gaskets, or other insulating components. When the electromagnetic

wave propagates outside the switchgear, it produces a Transient Earth Voltage (TEV) on the

metal casing of the switchgear. The Transient Earth Voltage (TEV) is only a few millivolts,

of short duration having a rise time of a few nanoseconds and can be detected non-

intrusively by placing a TEV probe on the outside of the earthed switchgear whilst the

switchgear is in service.

4.5 Cable Partial Discharge Activity

When a partial discharge event occurs in a cable, there will be a resulting current pulse

coupled onto the earthed sheath of the cable. These pulses will propagate away from the

discharge site in both directions. Once the pulse reaches a change in impedance at a cable

joint or termination, a partial reflection occurs. This results in the pulses travelling back

down the cable several times (depending on the cable length) as they decay away. The

current pulses can be detected non-intrusively using a Radio Frequency Current

Transformer (RFCT) sensor placed around the cable earth strap.

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5. Using the UltraTEV Plus²

The Temperature & Humidity and RFCT accessories plug into the Smart

Accessory Port. The UltraDish, Contact Probe and the Flexible Sensor plug

into the Ultrasonic Accessory Port

Smart

Accessory

Port

Right Button

Middle Button

Left Button

Home Button

Photo Sensor

microSD card slot

LED charging indicator

Audio out/headphone

socket

Ultrasonic

Accessory Port

Micro USB charging port

Ultrasonic Sensor

TEV sensor

Lanyard loop

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5.1 Charging the UltraTEV Plus2

The UltraTEV Plus² charges via the Micro USB port on the base of the instrument. The

UltraTEV Plus² can be charged from the supplied mains or in-car charger or from a standard

USB port.

The level of charge is indicated in the top right hand corner of the notification bar during

operation. During charging with the instrument switched off, the charge status is indicated

via the charging indicator LED on the base of the instrument.

 When the battery is being charged, the charging indicator turns Amber

 When the battery is fully charged, the charging indicator turns Green

For the quickest charging time, turn off the UltraTEV Plus2 instrument

during charging. Charging time is extended when connected to a USB port

compared to the mains charger.

The TEV/Cable PD and Ultrasonic measuring features are automatically

disabled when the instrument is being charged.

A fully-charged battery should provide approximately 6 hours of continuous

use while switched on and measuring. For practical purposes, a fully

charged battery should last a full day of surveying.

5.2 Turning the UltraTEV Plus² On/Off

Press and hold the Home Button for 1 second to turn on the UltraTEV Plus2.

The UltraTEV Plus2 will boot displaying the EA Technology logo before proceeding to the

main menu after a few seconds.

To turn off the UltraTEV Plus2, hold the Home button for 2 seconds, the screen will go

off and the instrument will power down.

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5.3 Notification Bar

The notification bar is used to display basic status information about the UltraTEV Plus2. It

displays information such as Temperature, Humidity, Battery Level and other system

information as shown below. Additional information such as icons depicting the type of

accessory plugged in are also displayed here.

The Phase Reference indicator will turn red when a phase lock hasn’t been

achieved

Below are other icons that could appear on the notification bar:

This icon indicates that the current audio source is TEV

This icon indicates that the current audio source is Ultrasonic

This icon indicates that the current audio source is the RFCT

This icon shows when a UltraDish has been connected to the UltraTEV Plus²

This icon shows when a RFCT has been connected to the UltraTEV Plus²

This icon shows when a Contact Probe has been connected to the UltraTEV Plus²

This icon shows when a Flexible Sensor has been connected to the UltraTEV Plus

This icon shows when the UltraTEV Plus² is charging

This icon is used to show when a Wi-Fi connection has been established

Battery Level

Indicator

Temperature &

Relative Humidity

Audio

Source

Time

Phase

Reference

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5.3.1 Temperature & Humidity

The temperature and relative humidity reading is displayed on the notification bar only after

connection of the sensor.

The temperature and relative humidity sensor pictured below is connected to the Smart Accessory

Port on the left hand side of the instrument. The connection of the accessory automatically starts

the data collection with the latest reading being displayed in the notification bar at the top left of

the screen.

In order to allow use of other optional accessories whilst still displaying a reference temperature the

final reading on removal of the sensor is persisted. Additional brackets around the measurement

demonstrate that this is a historic reading.

5.4 Menu Bar

The menu bar is located at the bottom of the screen. It displays icons that correlate to the

Left, Middle and Right Buttons. The icons on the Menu bar change depending on which

mode the UltraTEV Plus2 is in.

The Left button , Middle Button and Right Button can be pressed

to select the Main menu buttons respectively

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5.5 Main Menu

After powering up, the UltraTEV Plus2 will load up to the Main Menu as shown below.

The Home Button can be used to navigate back to the Main Menu at any

time.

The TEV icon on the main screen will change to a Cable PD icon

when a RFCT accessory is plugged in.

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5.6 TEV/Cable PD Menu

The TEV/Cable PD screen, selected via the top left icon on the Main Menu contains different

modes which can be used for the PD measurement.

The Interpretation option is only applicable when in TEV mode

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5.6.1 Measure Screen

The Measure mode is common to both TEV and Cable PD. This mode displays TEV readings

in dBmV (dB) or (if the RFCT accessory is connected) Cable PD readings in picoCoulombs

(pC).

To enter this mode, click the Measure icon .

 P/Cycle – Shows the pulses per cycle based on either a 50 or 60Hz mains

frequency.

 Severity – Shows the short term severity (calculated by multiplying TEV magnitude

(mV) by Pulses Per Cycle). When in Cable PD mode, this is calculated by Charge

(pC) multiplied by Pulses Per Cycle.

 Max dB – displays the maximum dB value registered by the UltraTEV Plus2 since the

screen was entered or paused/reset. This value is displayed in pC.

 Chart - The bar chart is used to show the amplitude of the current values being

read by the UltraTEV Plus2, from right to left.

 Noise Level – This displays the amplitude in dB of the background noise level.

To exit the TEV screen back to the main menu, press the Home button .

There is an option to record a reading, this can be done by either clicking the red record

icon on the screen or by pressing the Middle button . All recordings are stored within

a ‘survey’ detailed in a later section of this manual.

Pausing a reading can also be achieved by either presing the Right button or clicking on

the ‘Pause’ icon. Audio output is also muted during a pause operation. After pausing

the screen the measurment can be restarted by pressing the restart button.

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5.6.2 Phase Plot

The Phase Plot mode is common to both TEV and Cable PD. The upper section of the screen

shows measurement values as detailed previously under the ‘Measure Screen’. The lower

section contains a phase resolved intensity plot ‘Phase Plot’ of the measured activity.

The plot displays either TEV or Cable PD events’ phase angles (x-axis) against their

amplitude (y-axis). The colour scale represents the intensity (pulse count) at a given phase

angle and amplitude.

This option is useful for distinguishing between whether a measured PD activity is a

genuine discharge source or just noise. For example, genuine PD activity may manifest

itself as a stable phase resolved plot which will occur at the same position with respect to

phase angle cycle by cycle; whilst white noise will not be phase related occurring at irregular

positions on the phase plot.

The Pause and Record option is also available in this mode; Severity, Noise

Level and P/Cycle are calculated as described under the Measure Screen

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5.6.3 Waveform

The ‘Waveform’ mode is common to both TEV and Cable PD. When in Cable PD mode, values

will be displayed in mA, whilst in TEV mode they will be measured in dBmV as below.

To enter this mode, click the Waveform icon .

This mode displays a plot of a TEV or Cable PD activity as a function of time allowing an

instantaneous view of an activity’s amplitude with respect to time. This option can be used

to assist in distinguishing between genuine PD activity and noise. A Partial Discharge pulse

will normally manifest as a sharp fast rising edge pulse whilst noise is often slower and

less repeatable.

The Pause and Record option is also available in this mode as described

under the Measure Screen

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5.6.4 Histogram

This option (shown below) displays the number of events registered (y-axis) for a given

amplitude (x-axis). This measurement option is useful for determining if more than one

discharge source is present; two distinct groups of bars on this chart could mean there are

two sources of discharge at the respective dB (or pC) levels. The screen is also useful in

positively identifying a genuine source of PD and assessing its pulse rate when there is a

high pulse rate noise floor affecting the standard pulse per cycle calculation.

The Pause and Record option is also available in this mode; Severity, Noise

level and P/Cycle are calculated and as described under the Measure Screen

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5.6.5 Interpretation

The ‘Interpretation’ mode available for TEV readings only.

To enter this mode, click the Interpretation icon .

The interpretation screen provides a first pass summary of the switchgear’s condition by

taking into account both the magnitude and repetition rate of any detected pulses. The

guide distinguishes between noise, surface tracking and internal discharge providing an

indication of the suggested action.

This display is an easy to use software implementation of the TEV measurement

interpretation guide produced by EA Technology using decades of experience. The original

summary document giving an overview of the original guidelines for the interpretation of

TEV measurements is included on the next page.

The Interpretation screen is only available when in TEV mode

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5.6.6 Noise Detection

The UltraTEV Plus² incorporates a noise detection feature for TEV events. This feature continuously

monitors the background noise level during a TEV reading and alerts the user if the level is

approaching a point whereby the integrity of the reading may be adversely effected.

Noise is classed as any activity within the 3-80MHz band that is continuous in nature. These signals

are different to the short term events produced by TEV activity and can often mask the presence of

PD.

The UltraTEV Plus² report the noise level in dB below the main amplitude figure on each TEV

measurement screen. If this value reaches 10dB or above the unit displays a warning and prevents

the user continuing on the basic interpretation screen. This prevents the possibility of an incorrect

interpretation due to PD hidden within the background noise.

The remaining advanced screens, waveform, phase plot etc. will continue to function in the presence

of high background noise although it should be noted that the noise level may effect reported

amplitudes and count rates.

If the UTP² reports high background levels then attempts should be made to remove the source of

interference allowing the measurement to continue. Particularly frequent sources of interference

within indoor substations are electrical ballast florescent lighting, switch mode power supplies,

battery chargers and radio communication devices.

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5.7 Ultrasonic Screen

The Ultrasonic screen shows measurements taken using either the inbuilt Ultrasonic sensor

or the external Ultrasonic sensors (Contact Probe, Flexible Sensor or UltraDish) if

connected.

Ultrasonic magnitude is measured in dBµV and is displayed on the chart as phase angle (x-

axis) against amplitude (y-axis). The colour chart represents a key to show the intensity

(pulse count) at a given amplitude and phase angle.

This phase resolved plot can be used to further confirm the presence of a partial discharge

activity. In general PD activity will be displayed as a stable area which will occur at the same

to phase angle each cycle; whilst noise tends to be out of phase and occurs at irregular

positions on the phase plot.

The Pause and Record option is also available in this mode as described

under the Measure Screen

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5.7.1 Ultrasonic classification

The Ultrasonic display on the UltraTEV Plus² includes the output of EA Technology’s

proprietary ultrasonic classification algorithm. The algorithm processes measured

ultrasonic data in real time to give an indication whether the input data is a background

noise source or partial discharge activity.

The algorithm processes the data from the ultrasonic Microphone along with the phase

reference signal, and looks for patterns within the data stream which experts at EA

Technology have identified as typical indicators of partial discharge.

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5.8 Context Menu

Pressing the Left Button whilst in TEV, Cable PD or Ultrasonic modes brings up the Context

Menu as shown below. The Context Menu consists of a number of items with only those

relevant to the current mode of operation visible at any time. This mode allows commonly

used settings to be modified from within the measurement screen.

5.8.1 Audio output

The UltraTEV Plus² allows audio output of either Ultrasonic, TEV or Cable PD (dependent on

whether RFCT is connected or not) activity through the connection of external headphones.

The audio context menu allows control of the headphone output.

To modify the current audio settings click on the Audio icon . Within this sub menu the

audio output (TEV, Cable PD or Ultrasonic) can be selected, note this selection will persist

across modes.

To turn off the audio output toggle the Mute Button, the toggle icon will turn green to

indicate the Mute mode has been activated.

The volume of the audio output can also be modified by adjusting the slider to the desired

level as shown above.

The Context Menu contents is context specific; its contents will differ for

each measurement mode

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5.8.2 Filters

Select the filter icon to change the filter properties; this option is only enabled when

in Cable PD Measurement Mode and enables noise to be filtered from the cable PD

measurement.

Select the desired filter properties, a tick should appear when a selection has been (shown

above).

 No Filter – This option passes all frequency types.

 500 kHz High Pass – This option activates a high pass filter that passes all

frequencies from 500kHz and above.

 1.8 MHz High Pass – This option activates a high pass filter that passes all

frequencies from 1.8 MHz and above.

5.8.3 Phase Reference

Select the icon on the context menu to access the phase reference settings page. This

allows the source of the phase reference for the UltraTEV Plus² to be selected from the

following options:

 Photo – This option selects the Photo-sensor located on the front upper section of

the UltraTEV Plus² as the source of the Phase reference. The Photo-sensor requires

line of sight to a mains frequency light source such as a fluorescent fitting.

 E field – This option selects the in-built E-field sensor as the source of Phase

reference. The sensor detects the phase reference from the stray electric field

within the substation.

 Manual – Allows the user to manually adjust the phase reference.

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The current status of the phase reference is indicated by the colour of the phase readout.

A red phase display indicates that a phase lock has not been achieved. A continous red

phase display would neccesitate the change of mode.

When in Manual Mode the Right and Left buttons can be used to increase or decrease

the phase reference respectively. Once the desired value has been reached, press the

middle button to store as shown below.

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5.9 Settings Screen

To access the settings page, click the Settings icon on the Main Menu and the screen

shown below will be displayed.

5.9.1 System Settings

 Key Beep – allows the turning ON/OFF of the audible beeps when any of the

buttons are pressed. The button toggles to a green colour when Key Beep is

activated.

 Display Brightness – click on this to change the intensity of the backlight.

Keeping the backlight to a minimal level will improve battery life

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 Language – select this option to change the UltraTEV Plus² display language.

 Time/Date – select this option to change the Time and Date settings on the

UltraTEV Plus². The time zone can also be changed here as shown below.

 Auto Shutdown – this option can be used to Enable/Disable the Auto shutdown

feature of the UltraTEV Plus². After a defined period of inactivity, the UltraTEV Plus²

will shut itself down to conserve power. The inactivity period can also be changed

here as shown below.

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5.9.2 Measurement Settings

The Alarm Mode can be toggled on and off in this option. When the Alarm mode is activated,

the inbuilt beeper of the UltraTEV Plus² will be activated whenever the set Red threshold

level has been exceeded. In addition to this, threshold levels (Red and Amber levels) for the

various measurement features of the UltraTEV Plus² can be modified here together with the

line frequency.

The Ultrasonic only contains a Red Level threshold setting

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5.9.3 Network Settings

This section allows the setting of the Wi-Fi feature of the UltraTEV Plus².

The Wi-Fi functionality can be switched on/off using the toggle button shown above. Select

‘Network Connect’ above to connect it to a Wi-Fi network.

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Using the on-screen keyboard, enter the Wi-Fi password and then the Middle Button to

save the network.

The connection status of the UltraTEV Plus² can be viewed by selecting ‘Network Status’.

5.9.4 About

The about screen displays a summary of the UltraTEV Plus² components including both

hardware and software version numbers. The display also provides details of EA

Technology’s dedicated Product Support team should any further information be required.

5.9.5 In-field Firmware Upgrade

Through the ‘About’ screen, the firmware of the UltraTEV Plus² can be updated. To access

the firmware update screen press the update icon .

The UltraTEV Plus² can be updated in the field from an update file loaded onto the MicroSD

card. Please check with Product Support for any available update files. To use this feature

the image will initially need to be copied from the distribution media to the ‘updates’ folder

on the MicroSD card. An SD to MicroSD adapter is supplied for use with laptops or PCs

which have an in built SD card reader.

To book the UltraTEV Plus² in for calibration ahead of its recommended

due date, please contact Product support :

Email: product-support@eatechnology.com

Tel: +44 (0)151 347 2293

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To install a firmware update from the MicroSD card, press the “Check MicroSD for Update”

button on the above screen. The MicroSD card will be checked for any available updates,

and details populated on the display as shown below. To install the update found, press

the tick icon on the right of the menu bar and await the process to complete.

An update can only be installed if the instrument is plugged into the mains charger to avoid

any unwanted shutdown due to low battery whilst performing the update process. Once

installed, the instrument must be restarted to run the latest update.

To check you have the most current software version or if you need

assistance in updating your instrument, please contact product support

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5.9.6 Reset All Settings

This option can be used to reset the UltraTEV Plus² back to the default settings. Upon

pressing the option a notification will appear asking for the action to be confirmed.

Once confirmed the follow settings will be reset back to their default state:

 Key Beep Enable

 Display Brightness

 Language

 Auto Shutdown Enable

 Auto Shutdown Time

 Line Frequency

 TEV Red and Amber Measurement Thresholds

 Ultrasonic Red Threshold

 Cable PD Thresholds

 Wi-Fi enable

Any Wi-Fi networks previously connected to and their login credentials will be preserved,

and will not be cleared with the above.

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5.10 File Browser

The File Browser screen can be used to manage files and folders stored on the UltraTEV Plus²’s

microSD card. To access the file browser, click File icon on the Home screen.

Upon opening the File Browser, the contents at the root of the memory card will be displayed.

Selecting a folder, represented by the folder icon , will cause it to be highlighted within the File

Browser. The contents of the folder can then be displayed by pressing the icon or the physical

button below it on the instrument. A folder can be deleted by pressing the icon or the physical

button below it.

Selecting a folder, represented by the file icon , will cause it to be highlighted within the File

Browser. Information regarding the file such as size, date modified and time modified can then be

displayed by pressing the icon or the physical button below it on the instrument. A file can be

deleted by pressing the icon or the physical button below it.

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5.11 Screenshot

The UltraTEV Plus² allows the user to capture an image of the screen at any time. To initiate a capture

press both the left and right hand buttons simultaneously for two seconds.

Once capture completes a pop up window will appear providing the opportunity to rename the file

from the default as shown below. Selecting the tick in the bottom left hand corner of the image

stores the file to the removable microSD Card. The files are stored at \data and can be verified

through the file browser

To view the saved image the microSD card must be removed from the UltraTEV Plus² and connected

to a PC or similar device. Once connected the screenshots may be viewed by navigating to \data and

opening the relevant .png file.

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5.12 Function Check

The UltraTEV Plus²’s function checker is designed to allow users to verify the functionality of their

instrument using in built test sources. The Function Check display option can be used to toggle

these inbuilt test sources. To launch the Function Check display press the Function Check icon

on the Home screen.

To test a given function, for example, the TEV function, toggle on the TEV test source. Navigate to

any of the TEV measurement displays which should display TEV activity. Multiple test sources can

also be toggled and checked.

Please note that this option is not in any form a calibration check.

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6. Survey

The Survey mode of the UltraTEV Plus² is a powerful yet easy way to collect and store data

from a range of assets. Data from TEV, Cable PD or Ultrasonic measurement modes can be

recorded and stored with corresponding metadata linking the data and its associated

context.

All data recorded on the UltraTEV Plus² takes the form of a survey in order to give the data

context and a common structure for use when analysing the data offline.

6.1 Starting a Survey

There are two ways to start a survey; either by going through the Survey display off the

home menu, or by starting a data capture from any measurement screen.

Survey Icon

Pressing the Survey icon on the Main menu will display the Survey Mode display. This

display allows users to start, stop and view the progress of a survey.

To start a survey, press ‘Start Survey’ on the display. Doing this will show two options to

select from; “Select Workflow” or “Skip Workflow”. Workflows are a pre-populated

description of the measurements to be undertaken as part of a substation survey. A

workflow consists of information regarding the assets and the specific measurements per

asset that are to be performed.

To select a workflow file, press the “Select Workflow” option and then select the file from

the list. Once selected the Survey metadata fields contained within the Workflow file will be

displayed in a series of forms with any pre-populated information.

To perform a survey without a workflow, press the “Skip Workflow” button. Similarly to the

Workflow route, a series of forms will be displayed with fields about the substation,

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switchgear and conditions. The form field can be populated using the inbuilt virtual

keyboard or a drop down list of available options.

6.2 Ad-hoc Measurement

If a survey is not in progress when the record button is pressed in any of the TEV, Cable PD

or Ultrasonic measurement screens the data is still captured. On completion of the record,

the default survey information fields are displayed to capture the measurement context

data. This data is the same as entered when starting a survey through the menu icon. Once

this information has been entered, survey mode stays active ready for further data to be

recorded and added to the survey.

6.3 Survey Metadata Forms

As mentioned in the previous section, each survey requires the input of information about

the substation the survey is being conducted in. Some fields have populated lists of values

to select from, with each having the option to override by inputting a custom value, others

allow only virtual keyboard input and a select few have special behaviours.

Navigation through the forms is done using the left and right buttons on the menu bar or

using the corresponding physical buttons. The last form to be populated is indicated by

the right hand button on the menu bar changing to become a tick icon. Pressing this will

close the last form, save the entered information and return to the home menu ready to

start recording data.

If a workflow is not being used, the default form fields used are set out below along with

their behaviour:

Form

Name

Job

Field

Description

Behaviour

Job Number

The job number of the survey, used by

many users to link a survey to a contract

or package of work

Pressing the input field will show

the virtual keyboard

The Notification bar changes from blue to green to indicate a survey is

currently running as shown above

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Form

Name

Substation

Field

Description

Behaviour

Name

Name of the substation being surveyed

Pressing the input field will show

the virtual keyboard

Type

Type of the substation being surveyed

Pressing the input field will show a

populated list of substation types,

with the option to enter a custom

value using the virtual keyboard

Form

Name

Switchgear

Field

Description

Behaviour

Manufacturer

Manufacturer name of the switchgear

being surveyed

Pressing the input field will show a

populated list of switchgear

manufacturers, with the option to

enter a custom value using the

virtual keyboard

Type

The type of switchgear being surveyed

Pressing the input field will show a

populated list of switchgear types

with the option to enter a custom

value using the virtual keyboard

Installation

Date

Installation date of the switchgear

Pressing the input field will show a

date selector to input the

switchgear installation date

Rated

Voltage

The rated voltage of the switchgear

Pressing the input field will show a

populated list of voltages with the

option to enter a custom value

using the virtual keyboard

Operating

Voltage

The operating voltage of the switchgear

Pressing the input field will show a

populated list of voltages with the

option to enter a custom value

using the virtual keyboard

Busbar

Insulation

The insulation material of the

switchgear's busbar

Pressing the input field will show a

populated list of busbar insulation

materials with the option to enter a

custom value using the virtual

keyboard

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Form

Name

Conditions

Field

Description

Behaviour

Background

Metal

Background metalwork TEV value

Pressing the input field will cause a

background TEV measurement to

be performed

Background

Air

Background Air TEV value

Pressing the input field will cause a

background TEV measurement to

be performed

Temperature

Temperature as read by the Temperature

and Humidity Sensor

Pressing the input field will cause it

to be populated with the current

Temperature. The Temperature &

Humidity sensor must be connected

to do this.

Humidity

Humidity as read by the Temperature and

Humidity Sensor

Pressing the input field will cause it

to be populated with the current

Humidity. The Temperature &

Humidity sensor must be connected

to do this.

6.4 Using Populated Lists

Populated lists used in many of the above fields will look like that of below.

The list can be scrolled by dragging the list up and down using a finger or stylus. Selecting

an item is done by pressing an item then pressing the tick in the menu bar. If the “Other…”

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option is selected a virtual keyboard prompt will be displayed for custom input. If the cross

in the menu bar is pressed, the list will be closed and no input recorded.

6.5 Using the virtual keyboard

The virtual keyboard allows custom text to be input. Characters can be input using the

buttons on the layout, with additional characters and numbers available through the “123”

button. To accept the input text as input to the field, press the tick button on the menu

bar, to cancel, press the cross on the menu bar of the Left button.

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6.6 Background Measurements

The background measurements fields on the survey metadata forms have special

behaviour, pressing the input field triggers the UltraTEV Plus² to start measuring the TEV

level for a ten second period. Following this, the average measurement for the period is

stored. When performing the Background Metal measurement, the TEV plate of the UltraTEV

Plus² should be held against an unearthed piece of metalwork in the substation not

connected to the switchgear. The Background Air measurement requires holding the

instrument in free space in order to get an ambient reading.

The background temperature and humidity is taken directly from the current measurement

by the temperature sensor. Please note that the sensor needs to be connected to the

UltraTEV Plus² device.

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6.7 Recording Data

Once a survey has been started data can be recorded from any TEV, Cable PD or Ultrasonic

displays. The same data is recorded for TEV or Cable PD independent of which TEV/Cable

PD screen is currently displayed. To record data, simply press the record icon visible on the

menu bar, which will then start a 10 second period of data capture.

Different data is recorded for the different measurement modes as summarised below:

6.7.1 TEV recorded data

When recording data in any of the TEV modes, the following data is recorded and stored:

 Event data including phase angle, cycle count, amplitude, pulse width and rise time

 TEV Waveforms

6.7.2 Cable PD recorded data

When recording data in any of the Cable PD modes, the following data is recorded and

stored:

 Event data including integral, pulse width and rise time

 Cable PD Waveforms

6.7.3 Ultrasonic recorded data

When recording data in Ultrasonic measurement modes, the following data is recorded and

stored:

 Raw Ultrasonic audio

 Heterodyned Ultrasonic audio

 Processed Ultrasonic audio

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6.8 Viewing Survey Progress

The progress of a survey can be viewed at by navigating to the Survey menu then pressing

‘View Progress’. The view progress display shows a top view of a switchgear panel with

the different components making up a panel separated out. Each component shows the

total number of measurements taken on that component against the number of expected

measurements. The expected measurements are only applicable to surveys which are

following a workflow, which sets out the measurements that should be taken as part of that

survey. Using the left and right buttons on the menu bar, other panels within the survey’s

progress can be viewed.

Pressing any component on the panel view will display details of the measurements on that

component, including the measurement location, sub-location and average measurement

values.

6.9 Completing a Survey

A survey can be completed at any time by going to the Survey Menu and pressing the “Stop

Survey” button. Upon completing a survey, a summary of the survey is written to the survey

directory and the entire directory is archived into a zip file for safe keeping. If a large

amount of data has been recorded, archiving the data can take up to a minute. Once

archiving is complete the notification bar will return to its blue colour indicating that a

survey is now no longer in progress.

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7. Reviewing Results

Data collected during Survey mode or though ad-hoc recording is stored on the UltraTEV

Plus²’s MicroSD card. To facilitate viewing of the data the UltraTEV Plus² provides three

methods of connection:

 Wi-Fi – Allows a direct connection from the UltraTEV Plus² to a Wi-Fi enabled PC or

tablet.

 USB – Direct connection from the UltraTEV Plus² to a Windows based machine.

 Removal of the MicroSD card for viewing on a Windows/Linux/ Mac OS X based

machine.

7.1 Wi-Fi & USB Connection

The UltraTEV Plus² provides an inbuilt web server to support data management and

analysis. Once connected the UltraTEV Plus² home page can be reached by navigating to

192.168.10.1 in a web browser such as Google Chrome, Mozilla Firefox or Microsoft

Edge/Internet Explorer.

The home page, shown below displays a list of all Surveys stored on the UltraTEV Plus²’s

MicroSD Card.

The index of surveys on the UltraTEV Plus² can be used to quickly identify the site of interest

allowing the user to navigate either directly to the data analysis (view button) or to

download a zip file (compressed folder) containing the raw data (download button).

Clicking the view button takes the user to the data analysis screens detailed overleaf.

7.2 MicroSD Card & Data Zip Files

An alternative method of viewing the data held on the UltraTEV Plus² is by direct file access.

This can either be from a previously downloaded data zip as above or by accessing the

MicroSD card directly.

To directly access the MicroSD card ensure the UltraTEV Plus² is powered down, then locate

the MicroSD card at the base of the instrument and gently push on the card to eject it.

The MicroSD card will contain a separate .zip file (compressed folder) for each survey and

ad-hoc measurement undertaken. Inside each folder there is an html page named

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‘index.html’. Extracting the zip file and then opening the ‘index.html’ file inside this folder

will direct you to the analysis pages.

7.3 Data Analysis Screens

The UltraTEV Plus2 has a web interface for analysing data captured by the instrument. These

analysis pages can be accessed through a web browser or downloaded for offline analysis

as detailed above.

Following selection of ‘View’ on the landing page, or opening of an ‘index.html’ file from

the decompressed zip folder, a new page will appear with a visualisation of the switchgear

surveyed.

The overview or ‘index’ page provides diagrammatic representation of the switchgear

surveyed along with an icon detailing each measurement. An overview of the metadata

entered during the substation visit is included on the left hand side of the page. This data

includes substation information such as site name and switchgear information such as

manufacturer, voltage etc. Below the metadata on the left hand side of the page a

‘download survey summary’ button is available. When pressed this button downloads a

Comma Separated Variable (CSV) file containing an overview of the survey results.

The measurement icon shown below are positioned on the panels as per the location

entered during the site survey. Clicking any of the available measurements on a panel

component will open the analysis page for the corresponding measurement.

- TEV

- Cable PD

- Ultrasonic

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7.3.1 TEV & Cable PD Analysis Screen

Both TEV and Cable PD recorded data share the same suite of analysis screens. Once a TEV

or Cable PD measurement has been selected from the index page a new tab will open in

the browser displaying the analysis page corresponding to the measurement selected.

Multiple individual analysis pages can be opened simultaneously in this way to aid

comparison.

The TEV and Cable PD analysis pages both have metadata regarding the current

measurement on the left side of the page, with another button beneath to download the

raw dataset for each graph to CSV. The chart displayed on each page can be changed

between Waveform, Histogram and Phase Resolved by clicking the tabs in the upper right

hand corner.

Both Phase Resolved and Waveform graphs are able to be zoomed by clicking and dragging

on the graph area; the original zoom level can be returned to by clicking the respective

graphing tab in the upper right hand corner. Hovering the mouse over a point/bar on each

respective graph will produce a tooltip with information regarding that event. On the Phase

Resolved graph a legend can be seen on the upper right of the graph area, indicating the

scaling of colours for each point.

When the Waveforms tab is opened, a new control will appear beneath the metadata on the

left. The ‘Waveform Control’ section allows navigation through the waveforms collected

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using the up/down arrows next to the waveform number. The ‘Show All’ button can be

used to show all waveforms on the same graph.

7.3.2 Ultrasonic Analysis

Once an ‘Ultrasonic’ measurement has been selected on the index page, a new tab will

open in the browser with the analysis page corresponding to the measurement selected.

The metadata section will be displayed to the left side of the page, and the ‘Play’ button

aligned with the ‘Heterodyned Ultrasonic’ label can be used to listen to or download the

.wav file (browser dependent). If the browser does open the file and begin to play it, right

click the player and select ‘Save file as’ to save the file.

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8. Detecting Partial Discharge using the UltraTEV

Plus²

Due to the tri-sensor capability, the UltraTEV Plus² is able to detect Partial Discharge activity

on the surface of insulation using Ultrasonic detection, internal to insulation by measuring

TEV signals and in cables and cable accessories using the RFCT accessory.

This section covers how to use the UltraTEV Plus² to detect PD activity using the three

sensor technologies.

8.1 TEV Measurement

TEV measurements are performed using the TEV sensor embedded into the front face of

the instrument.

8.1.1 Background Noise

Electromagnetic signals from sources outside the switchgear can also produce voltages on

the outside of the switchgear. These electromagnetic sources can come from a multitude

of sources such as overhead line insulators, transformer bushings and strong radio signals.

These sources will produce equivalent signals on metalwork which is not electrically

connected to the switchgear such as metal substation doors or fencing. Measuring the

interference levels on these surface before taking readings from the switchgear will help

allow identification of PD over background noise.

TEV measurements cannot be taken with the RFCT accessory connected to

the instrument

If the background noise is less than 10dB then the UltraTEV Plus² pulse

counter is not incremented and will read zero

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8.1.2 Measuring TEV

Switch on the UltraTEV Plus² and wait until home menu is displayed. Press the TEV icon on

the home menu then choose which TEV display is required. The ‘Interpretation’ display is

recommend for first pass with the advanced functionality of the other modes being utilised

to further inform the user once a signal is detected.

To take a measurement, hold the TEV sensor squarely against the metalwork of the asset

under test as shown overleaf. Any readings will be displayed on the screen with the

interpretation message adjusted to take account of the reading’s amplitude and pulses per

cycle. Please note that the readings will not remain on the screen once the TEV sensor has

been removed from the metalwork.

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8.2 Cable PD Measurement

To perform Cable PD measurements, the RFCT accessory needs to be connected to the

UltraTEV Plus². The RFCT connects to the Smart accessory port found on the left hand side

of the instrument.

8.2.1 Practical RFCT Connection Requirements

Using the RFCT for online PD tests on medium voltage power cables requires direct access

to the earth bonding strap. If present the split core radio frequency current transformer

RFCT can simply be clamped around the earth cable. This method can be used on-line

without disconnecting cables or switching off supplies to customers.

With XLPE cable installations the user can normally get access to the cable earth strap or

the core of the cables. The earth strap can be looped out of the termination box to give

better access. With PILC (Paper Insulated Lead Covered) cables difficulty may arise attaching

the RFCT as the cable earth and switchgear earth can be bonded together. This is more

usual on older PILC cables using compound filled cable boxes.

8.2.2 Measuring PD in cables

Switch on the UltraTEV Plus² and wait until home menu is displayed. If the conditions set

out above are met, install the RFCT around the earth strap of the cable under test. Proceed

to connect the fitted RFCT to the UltraTEV Plus² using the supplied cable; connect the BNC

to the RFCT and the LEMO™ connector into the Smart accessory port as shown below. The

home menu on the UltraTEV Plus² will now display a Cable PD icon in place of the usual

TEV icon.

EA Technology RFCTs are designed to be installed by suitably competent

operators on cable earth/ground straps which are suitably and efficiently

connected to earth/ground to maintain safety.

RFCTs, connecting leads and test equipment do not provide protection

against high voltage.

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RFCTs, connecting leads and test equipment do not provide protection

against high voltage. Ensure that the accessory is only connected to cables

at earth potential.

Press the Cable PD icon on the home menu and proceed to press on the Measure option.

The screen will display a bar graph of the measured PD values in picocoulombs (pC). To

obtain a further insight into the discharge activity on a cable, select the ‘Phase Plot’ option

on the Cable PD screen. This screen provides a phase resolved reading of Cable PD activity

within the cable under test.

8.3 Ultrasonic Measurement

The UltraTEV Plus² is equipped with a built-in ultrasonic sensor which can be used to detect

the acoustic emissions of surface partial discharge activity. External ultrasonic sensors are

also available to use with the UltraTEV Plus² allowing use in outdoor compounds, on sealed

assets or in hard to reach places. When taking airborne ultrasonic readings the sensor

should not touch the asset or plant being investigated.

8.3.1 Measuring Ultrasonic

Switch on the UltraTEV Plus² and wait until home menu is displayed. Proceed to plug in the

supplied Headphones; select the Ultrasonic icon on the main menu. The screen will now

display a phase resolved plot of ultrasonic activity.

Ultrasonic activity above the background level may be significant. Genuine discharge can

be identified by a crackling sound (like a sizzling frying pan) in the headphones or by phase

related groups on phase plot. Further confidence of a detection can be obtained by the

classification algorithm output displayed on the top left of the screen.

8.3.2 Measuring Ultrasonic with the UltraDish Accessory

The UltraDish provides a means of detecting discharge sources at a distance. It comprises

a transparent parabolic reflector that focuses the ultrasonic sound on to a sensor mounted

at the focus point of the reflector. The UltraDish gives an effective increase in gain

compared to the built in sensor allowing discharges to be detected at much greater

distances such as insulator strings on overhead assets.

To use an UltraDish the connector must be plugged in to the Ultrasonic sensor input on

the side of the UltraTEV Plus². The UltraDish is aimed at the point of interest with either

the optical sight or by switching on the laser pointer with the button on the handle.

The UltraTEV Plus² defaults the built-in ultrasonic sensor if no accessory is

plugged into the Ultrasonic Accessory port

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Due to the gain of the UltraDish, readings taken with the UltraDish cannot

be compared to readings taken with the Internal Sensor, the Flexible Sensor

or the Contact Probe.

This accessory is available with the Kit 3 package. To discuss procuring this

accessory please contact the product support team via email:

product-support@eatechnology.com

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8.3.3 Measuring Ultrasonic using the Flexi Probe sensor Accessory

The Flexible Sensor provides a means of reaching inaccessible parts on the switchgear. The

sensor is mounted at the end of a flexible goose-neck which allows the angle of the sensor

to the handle to be adjusted. This allows the user to make measurements where it would

be difficult to use the built in sensor and still be able to read the display.

To use a Flexible Sensor the connector must be plugged into the external sensor input on

the Ultrasonic Accessory port of the UltraTEV Plus². To avoid damage to the socket or

connector ensure that the red dots are lined up before attempting to plug in the Flexible

Sensor. The Flexible Sensor is used in the same manner as the Internal Sensor.

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8.3.4 Ultrasonic Measurement using the Contact Probe Accessory

The Ultrasonic Contact Probe is provided to enable discharges to be detected in enclosed

areas where there is no direct air path from the discharge source to the sensor. The Probe

connects to the external sensor connector and is clamped on to the area of interest using

the magnets surrounding the sensor plate. To avoid damage to the socket or connector

ensure that the red dots are lined up before attempting to plug in the Ultrasonic Contact

Probe. The probe will detect discharge sources inside the enclosed area by detecting the

energy transmitted to the enclosure. Care must be taken to eliminate other sources that

could cause the signals from discharges to be masked, e.g. accidental movement of the

probe itself or strong vibration on the panel.

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8.3.5 Using the Ultrasonic Contact Probe

The Ultrasonic Contact Probe should be used if there is not a direct path between the PD

source and instrument sensor as shown in the second image below. However, it must not

be used if the tank containing the expected PD source is separated with another layer

(shown in the third image). In cases where there is a direct air path between the source of

PD and the instrument, an airborne sensor should be used as shown in the first image

below. Due to the physics of ultrasound, in most cases using an airborne sensor may offer

better sensitivity than that obtained using the Ultrasonic Contact Probe.

1) Ultrasonic signal can propagate through the air path. The Ultrasonic Contact

Probe can be used; however, better results may be obtained using the airborne

sensor.

2) No available air gaps - using an Ultrasonic Contact Probe is the best practice.

3) There is no access to the tank containing PD source, neither the airborne sensor

nor the Ultrasonic Contact Probe will provide a valid reading.

Surface PD

Contact

Sensor Head (stainless steel)

Aluminium Body

Cable Socket

Asset surface or measurement point

(Where the Ultrasonic Contact Probe is attached)

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8.3.6 Detection, Measurement and Localisation of the Partial Discharge

Detection of the Partial Discharge using the Ultrasonic Contact Probe is based on the PD

pattern recognition carried out by operators. The audio signature of a Partial Discharge

detected by the Contact Probe is similar to those obtained using airborne sensors. Special

care has to be taken to distinguish phantom signals from genuine signals caused by surface

PD.

Due to the differing propagation paths of the ultrasonic signals, measurements carried out

using the Ultrasonic Contact Probe cannot be compared against measurements carried out

using airborne sensors. In general signals detected by the Contact Probe are smaller as a

result of the physical properties of the asset and propagation path. Comparisons between

two measurements should only be made on assets of the same type using the same

configuration of the Contact Probe.

8.3.7 Mounting Practices

The Ultrasonic Contact Probe was designed to provide sufficient sensitivity to allow it to be

used to detect low level ultrasonic sources.

The image below shows scenarios where the Ultrasonic Contact Probe is mounted

ineffectively to the asset enclosure. Any air gap between Sensor Head and measurement

point will effectively attenuate signals to a level where even strong discharges will not be

detected. Therefore before any permanent or temporary installation, the Sensor Head and

asset surface need to be cleaned of any loose or unstable material. If the assets surface is

very rough and uneven this will create air gaps which will result in poor contact between

the Sensor Head and the asset.

1) Dust ingress between Ultrasonic Contact Probe Sensor Head and the asset surface

2) A rough or uneven surface will drastically decrease the amount of signal being

transferred to the Sensor Head

The images below show the correct way of mounting the Ultrasonic Contact Probe to the

asset in order to take a valid measurement. Ideally the Ultrasonic Contact Probe will be

attached to a relatively flat surface using its magnetic clamp. This will eliminate any

phantom noises which are described in the section below.

The second image shows a case where the surface is very rough and uneven. One of the

following couplants may be used:-

 Water based – suitable for quick measurement offers very good coupling.

 Oil based – suitable for long term monitoring as the oil will not evaporate quickly.

Contact

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 Solid state – suitable for long term monitoring but does not offer as good coupling

as oil based.

 Use of existing stickers on the switchgear such as ‘danger’ notices

The last image shows the application of pressure to the Ultrasonic Contact Probe against

the asset under investigation. This can improve the signal transfer and increases its

detection abilities. Please note, when the instrument dB values are read for comparison

purposes, always use the same type of the sensor, in the same position as previously used.

The asset measuring point can be marked on the plant item to facilitate easy location in

future.

1) Relatively flat and smooth surface

2) Using suitable couplant in the case of a rough surface

3) Carefully pressing the Ultrasonic Contact Probe towards the asset to increase

coupling may eliminate the need to use a couplant

Contact

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8.3.8 Sources of Noise and Phantom Signals

The following images present some examples of how unwanted signals may be introduced

during the PD detection process when using the Ultrasonic Contact Probe. These can be

categorised as sources of noise and sources of phantom PD signals. The difference between

the two is that noise decreases our detection capabilities by masking the PD signal, whereas

phantom signals may be confused as a PD source.

The first image shows that when the UCP is kept in the hand during measurements, even

tiny movements of the hand can introduce significant noise to measurements through

surface noise. In cases where it is necessary to hold the Ultrasonic Contact Probe during

measurements (e.g. pushing the sensor to obtain more signal or non-magnetic asset

enclosure), a coupling fluid may help to reduce this type of noise.

Any vibrations of the asset surface caused for example by rain in outdoor assets or vibration

of transformers may cause phantom signals. In such cases the audible signal may be appear

exactly the same as a genuine PD source. These two examples are illustrated in the second

and third images.

1) Shaking Ultrasonic Contact Probe, e.g. when held in the hand

2) Rain in outdoor assets

3) Vibration (including transformers) of asset enclosure where the Ultrasonic Contact

Probe is attached

Contact

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9. UltraTEV Plus² Specification

TEV Measurements

Sensor: Capacitive

Measurement Range: 0 – 60 dBmV

Measurement Bandwidth: 3 – 80 MHz

Resolution: 1dB

Accuracy: ±1dB

Max Number of Pulses/Cycle: 1953 at 50Hz or 1627 at 60Hz

Min Level for Pulse Count: 10 dBmV

Ultrasonic Measurements

Sensor: Ultrasonic Microphone

Measurement Range: -7dBµV to 68 dBµV

Resolution: 1dB

Accuracy: ±1dB

Transducer Sensitivity: -65dB (0dB = 1volt/µbar RMS SPL)

Transducer Centre Frequency: 40 kHz

Transducer Diameter: 16mm

Cable PD Measurements

Sensor: Radio Frequency Current Transformer

Measurement Range: 100 – 100 000 pC

Measurement Bandwidth: 41 MHz

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Hardware

Enclosure: Self-coloured vacuum formed plastic case

Screen: 3.5” TFT Touchscreen

LED Backlight

640 x 480 Resolution

Indicators: Charging indicator LED

Controls: 4 x Push-Buttons

Connectors: Micro USB connection port

MicroSD Slot

2 x Accessory connection ports

Headphones: 3.5mm jack; Min. 8 ohms

Environmental

Operating Temperature: -20 - 50 °C

Humidity: 0 - 90 % RH non-condensing

IP Rating: 54

Dimensions

Size: 201mm x 76mm x 34mm

Weight: 0.44kg

Power Supplies

Internal Batteries: 3.7V, 6.6Ah rechargeable Lithium-Ion

Typical Operating Time: Approx. 8 hours

Battery Conservation: Automatic shutdown after 5 minutes of inactivity

(configurable)

Charging Time: Approx. 6 hours

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Battery Charger

Rated Voltage: 100 – 240 AC

Frequency: 50 - 60Hz

Charger Output Current: 2 A

Battery Charging Current: 1.8A @ 5V nominal

Dimensions: 61.89mm x 39mm x 32.3mm

Weight: 65g (approx.)

Operating Temperature: 0 - 40°C

Operating Humidity: 20% – 85%

Storage Humidity: 5% – 95%

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10. Declaration of Conformity

Manufacturers Name: EA Technology Ltd

Manufacturers Address: Capenhurst Technology Park

Capenhurst

Chester

CH1 6ES

Type of Equipment: UltraTEV Plus²

Model Number: UTP2

I hereby declare that the equipment specified above is tested to and conforms with the

essential radio test suites included in the following standards:

Standard

Issue Date

ETSI EN 300 328-2

V1.8.1 April 2012

ETSI EN 302 291-1

V.1.1.1 July 2005

and therefore complies with the essential requirements and provisions of the R&TTE

directive 1995/5/EC of the European Parliament and of the council of 9th March 1999 on

radio equipment and Telecommunications Terminal Equipment and the mutual recognition

of their conformity and the requirements of Annex III (conformity assessment procedure

referred to in article 10(4)).

Robert Davis

Chief Executive Officer

EA Technology Ltd

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11. Maintenance

No attempt should be made to gain access to the internal circuitry of the UltraTEV Plus², or

its accessories. Advice should be sought from the manufacturer, or the supplier, if any

doubt exists over the equipment's performance or operation.

Avoid storage in damp and humid conditions and do not subject it to temperature

extremes, excessive vibration or shocks. Do not stand on the case of the UltraTEV Plus².

12. Warranty Policy

What Does the Warranty Policy Cover?

EA Technology products and accessories are warranted against defects in material and

workmanship for twelve months from the date of despatch from our premises.

During the warranty period, EA Technology will, at its option, either repair or replace

products, parts or accessories which prove defective.

What is Not Covered by the Warranty Policy?

The following are not covered: damage caused by accident, misuse, abuse, product

modification or neglect; damage resulting from failure to follow instructions contained in

your operating manual; damage resulting from the performance of repairs by someone not

authorised by EA Technology.

Warranty Policy for Repairs

Repaired products are warranted against defects in workmanship and materials for a

period of six months, or the remainder of the original warranty period, whichever is

greater.

product-support@eatechnology.com

+44 (0)151 347 2293

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13. Calibration

Calibration interval: 12 months

Your application may require a different calibration interval dependant on the frequency of

use. The calibration interval should begin on the date the UltraTEV Plus² is placed in

service.

14. Repair

For information on repairs

product-support@eatechnology.com

15. Waste Electrical and Electronic Equipment

Directive (WEEE)

EA Technology is a member of an approved compliance scheme as defined by the WEEE

directive. When an EA Technology product reaches the end of its operational life, it must

be recycled by a licensed waste management operator, or returned to EA Technology for

recycling.

16. Continuous Improvement

EA Technology has a policy of continual product development and enhancement.

Consequently, there may be minor variations in specifications or operation that are not

covered in this operating manual.

Every effort has been made to ensure that the information provided in this operating

manual is accurate at the time of going to print.

If any errors or omissions are noticed, please notify

product-support@eatechnology.com

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17. Contact Us

Head Office

EA Technology Ltd

Capenhurst Technology Park

Chester, UK, CH1 6ES

Tel: +44 (0)151 339 4181

For details of our international offices and distributors, please visit our website:

www.eatechnology.com/contact-us

Sales

Email: sales@eatechnology.com

Freephone: 0800 027 7243 (UK only)

Product Support

Email: product-support@eatechnology.com

Freephone: 0800 032 6657 (UK only)

Tel: +44 (0)151 347 2293

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18. Record of Changes

Date

Version

Author(s)

Notes

15th April 2016

2388L011

Gareth Devine

First Issue

20th April 2016

2388L012

Gareth Devine

Second Issue

27th May 2016

2388L013

Gareth Devine

Third Issue

25th August 2016

2388L014

Gareth Devine,

Sion Hughes

Fourth Issue

07th October 2016

2388L015

Gareth Devine

Fifth Issue

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electronic, mechanical, photocopied, recorded or otherwise, or stored in any retrieval system of any nature

without the written permission of the copyright holder.

EA Technology Limited, Capenhurst Technology Park, Capenhurst, Chester, CH1 6ES, UK

Tel: +44 (0)151 339 4181 Fax: +44 (0)151 347 2404

http://www.eatechnology.com

Registered in England number 256631

www.eatechnology.com

Main reception: +44(0) 151 339 4181

EA Technology, Capenhurst Technology Park,

Capenhurst, Chester, CH1 6ES, United Kingdom

www.eatechnology.com

Main reception: +44(0) 151 339 4181

EA Technology, Capenhurst Technology Park,

Capenhurst, Chester, CH1 6ES, United Kingdom

Global Footprint

We provide products, services and support for customers in 90 countries, through our offices in

Australia, China, Europe, Singapore, UAE and USA, together with more than 40 distribution partners.

Our Expertise

We provide world-leading asset management solutions for power plant and networks.

Our customers include electricity generation, transmission and distribution companies, together

with major power plant operators in the private and public sectors.

 Our products, services, management systems and knowledge enable customers to:

 Prevent outages

 Assess the condition of assets

 Understand why assets fail

 Optimise network operations

 Make smarter investment decisions

 Build smarter grids

 Achieve the latest standards

 Develop their power skills

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