Fluke 2638A Hydra Series Iii Data Sheet 3000 LiNK Tools. The Wireless Team.

2015-09-09

: Fluke Fluke-2638A-Hydra-Series-Iii-Data-Sheet-807963 fluke-2638a-hydra-series-iii-data-sheet-807963 fluke pdf

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Fluke 2638A

Hydra Series III

Data Acquisition System/

Digital Multimeter

Price-performance break-

through in a stand-alone

data acquisition system

The Fluke Hydra Series III continues the

Hydra Series legacy of precision, multi-

channel data acquisition. The new Series

III improves on Hydra’s industry-leading

thermocouple accuracy and adds a new

dimension to how you collect and view data

in a portable system.

DC measurement accuracy of 0.0024 %, basic 0.5 °C thermo-

couple accuracy, full-color display, easy-to-use menu system

and industrial safety ratings put the 2638A in a category of its

own as a precision data acquisition system. The dedicated 6.5

digit digital multimeter (DMM) mode provides additional utility

and value.

The 2638A is expandable from 22 to 66 channels of dif-

ferential analog inputs. A flexible, 22-channel Universal Input

Connector lets you connect and disconnect any type of input to

any channel, quickly and easily. Selectable inputs include dc

voltage, ac voltage, resistance, thermocouple, RTD, thermistor,

frequency and dc and ac current. You can also use the 2638A

with optional software and other Fluke data loggers to create

a flexible, customized data acquisition system with an almost

unlimited number of input channels.

Technical Data

2638A Hydra Series III features

at a glance

• DC accuracy of 0.0024 %

• Thermocouple accuracy of 0.5 °C

• Up to 66 universal differential isolated

inputs

• On-screen color trend graphing and

analysis

• Easy-to-use menu system for setup and

data management

• Input types: ac V, dc V, ac I, dc I, ther-

mocouple, PRT (2, 3, 4 w), thermistor,

resistance (2-4 w), frequency

• Multi-channel real-time data display

• 6.5-digit bench DMM function for front-

panel inputs

• Monitor function for real-time viewing and

charting between scans

• 20 on-board math channels

• One-button screen capture of chart or

data displays

• 45 channels/second basic dc scan rate

• Internal 57,000 scan/setup file memory

• USB flash drive support

• Data security features

• CAT II 300 V input safety rated

2 Fluke Corporation Fluke 2638A Hydra Series III Data Acquisition System/Digital Multimeter

Dedicated DMM function with graphing and statistics

Three slots hold

relay cards and

input modules;

22 channels

each slot

Blank panels

for unused

card bays

USB (virtual

serial port)

Totalizer, DIO, alarm outputs,

external trigger port

Power and fuse

selection for 100 V,

120 V, 220 V, 240 V

Power switch

Back-lit main function keys—always

lets you know your operating mode

and confirms recording status

Standard DMM style inputs—

for DMM channel with automatic

resetting overcurrent protection

Memory management for downloading

and moving data and setup folders

Five function keys support faster setup and operation

Stand by button pauses operations without losing accuracy

or data

USB support for easy

transfer of data and

setup files

Navigation keys

for fast, easy

selection

of information

LAN 10/100

Accurate industrial thermocouple measurements

The 2638A incorporates the Fluke patented Universal

Input Connector to bring more accuracy to thermo-

couple measurements than most other instruments in

its class. The Universal Input Connector supports 14

common thermocouple types. Temperature-focused

menu selections make the 2638A especially suitable

for temperature validation applications. If you need to

“zero” a large number of thermocouples to a known

reference temperature before starting a temperature

profiling or validation test, the 2638A will normalize

all readings to your reference channel at the push of a

button and store the offsets for reference in a sup-

porting data file. If you are conducting chamber tests,

heat treating tests under AMS guidelines, or validating

temperature devices under 21 CFR regulations, Hydra

Series III makes it that much easier to comply.

3 Fluke Corporation Fluke 2638A Hydra Series III Data Acquisition System/Digital Multimeter

Clear top case with embed-

ded channel numbers for easy

wiring identification

Electronic ID with serial

number and calibration date

reports to the 2638A

Dedicated low burden ac/dc

current channels

20 universal channels

and two dedicated low

burden current channels

(ac/dc) per module

Strain reliefs

to help

secure wiring

connections

Universal Input Connector

The Universal Input Connector

plugs into any open slot in the

2638A that contains a relay card.

The Universal Input Connector has

22 input channels (20 universal

inputs and 2 dedicated, low-burden

input current channels). Each input

connector contains a CJC (cold-

junction compensation) device,

which is calibrated at the factory.

The calibration date and input con-

nector serial number are programed

into the input connector and are

read by the 2638A when installed.

This information is saved in the test

setup data file, which is available

for review with any associated scan

data from a test setup. This feature

is a valuable form of traceability

if you are working in a regulated

industry.

Wiring a test or system setup

for 20 to 60 or more channels

can be time consuming. With the

inexpensive plug-in Universal

Input Connector, you can wire your

system once, quickly disconnect the

connector from your Hydra, then

reconnect the Hydra to another

input connector for use in a differ-

ent area.

Other data loggers require you

to wire your inputs directly to an

expensive “plug-in” active compo-

nent signal conditioning module.

If you need your instrument for

another test at another location,

you must remove your wiring or

use another expensive plug-in

signal conditioning module. With

Hydra Series III, all your signal

conditioning is inside the main-

frame, not in your input connector.

Using multiple low-cost Univer-

sal Input Connectors gives you the

flexibility to leave your input con-

nector at the test site, completely

wired, and ready to use. When you

need data from that site, simply

“plug in” and load your saved setup

file. It’s that simple!

Expandable channel capacity

Each 2638A has three slots in

the rear panel. Each slot can hold

a user accessible relay card and

a 22-channel Universal Input

Connector.

Three configurations are avail-

able, from 22 channels to 66

channels per mainframe. Select a

base model with 22 channels and

add 22-channel expansion kits

when needed. The low cost per

channel makes a 2638A a good

value for any budget.

Graphical color display with

easy-to-use menus

Never get lost again in a complex

menu tree while configuring chan-

nels or setting up a test. The large,

full color, thin film diode (TFD)

display enables the Hydra SeriesIII

to display comprehensive easy-to-

understand data and easy menu

navigation.

Back-lighted function keys quickly

confirm the active menu selection.

The “Record” key illuminates to

indicate when the 2638A is recording

data in scan, monitor or DMM mode.

You always have visible confirmation

when your data is being recorded.

Copy-and-paste channel func-

tions make repetitive channel setups

a simple task. Top-of-screen menu

bar headings always let you know

where you are in the setup process.

View your data with the push

of a button. Page through all chan-

nel data and alarms in a quick view

mode or scroll through channels and

channel statistics individually. Statis-

tics include rate of change, min, max,

standard deviation, average, sample

size and peak-to-peak information.

4 Fluke Corporation Fluke 2638A Hydra Series III Data Acquisition System/Digital Multimeter

Real-time data charting with

historical review

Chart the real-time data of up

to four channels at once. Simply

select your channels and view real

time charts of your measurements.

The chart will auto scale for best

fit of the displayed values. Zoom

in or out to view areas of inter-

est with the push of a button. A

history mode enables you to scroll

through previously collected data

within the scan file…all with-

out a PC and expensive charting

programs.

Language support

All displayed text in the menus

and data display area are trans-

lated to eight languages. You can

change the language under the

instrument setup area with the

push of a button. French, Span-

ish, Japanese, German, Korean,

English, Portuguese, Chinese and

Russian are all supported lan-

guages in the 2638A.

Screen capture function

With one key push on the front

panel, you can capture the screen

contents of the 2638A directly to

the USB drive in .jpg file format.

Capture trend chart results or

data displays for reports or just

closer review.

Two alarms per channel

Each channel can be set for two

alarm points: High-High, High-Low

or Low-Low, in any combination.

The 2638A then compares the set

points during each scan. An out-

of-range value is reported on the

main display and data files. You

can also assign any alarm point to

any of six TTL alarm outputs.

Math channels

Each channel measurement can

be set to scale and record your

measurement using mx+b gain

and offset calculations that are

available during your channel

setup menu. In addition, each

2638A mainframe has 20 internal

math channels with alarm set-

tings for more complex calculations

that record results to your data file

during each scan. Each channel

result can be used as a variable in

another math channel calculation.

DMM mode adds

functionality and value

The Hydra Series III is based on a

6.5 digit (22-bit) precision digital

multimeter measurement engine

with exceptional measurement

quality and resolution—so when

you are not using your Hydra to

collect multi-channel data, you can

use it as a precision digital mul-

timeter. Front-panel “DMM-style”

input jacks and dedicated DMM

menu selections enable you to

measure dc voltage, dc resistance,

ac voltage, ac resistance, Ohms,

frequency, and temperature (ther-

mocouples, RTDs and thermistors).

Record DMM measurements to a

separate DMM data file for later

viewing. The 2638A also displays

measurement statistics and graphs

measurements right on the main

display.

USB and internal memory

The Hydra Series III features 20mb

on-board memory for storing over

57,000 data records and con-

figuration files. In addition to this

large on-board memory, a built-in

USB port is available to collect

and store large files directly to a

USB flash drive. An on-board file

management menu makes moving

data files or configuration files

from internal or USB memory to

your PC easy.

Dedicated DMM functions.Real-time data charting with historical review.

5 Fluke Corporation Fluke 2638A Hydra Series III Data Acquisition System/Digital Multimeter

Memory management

The main panel memory key opens

a simple menu for managing data

files and setup files. If you want

to load a previously saved setup

file for a test, simply select your

file from either internal memory

or from a USB drive and you are

ready to start scanning. You can

easily move stored internal data

to a USB for PC analysis or move

setup files to another 2638A. With

Hydra Series III you have easy

access to data without the need for

a direct PC connection.

To help safeguard your test

data in the case of a power

outage, the 2638A has a menu

selection to resume scanning in

the same configuration immedi-

ately when power is restored. It is

just another way the 2638A works

with and protects your data.

Flexible triggers and

resolution

To begin a scan, you have several

options that can be set in your test

setup menu:

• External trigger

• Remote SCPI command

• Alarm trigger

• Time interval trigger

• Manual trigger initiated from

the front panel

Measurement resolution is at your

control with the 2638A. You can

choose between standard set-

tings of Fast, Medium or Slow (4.5,

5.5, 6.5 digits) for the resolution

you need. You can also select

custom measurement speeds on

individual channels to get the

accuracy and resolution to suit

your requirements.

Totalizer

A totalizer input located on the

rear panel provides a simple coun-

ter that records to the data file on

every scan. The totalizer count can

accumulate up to 1,048,575 counts

and be reset from the front panel

or remote command.

Channel statistics

Each channel’s measurement

statistics can be viewed at any

time. During scanning, monitor-

ing or in DMM mode, you have

rate-of-change (per minute and

per second), standard deviation,

minimum, maximum, peak-to-

peak, and average—all available at

the touch of a button.

Connectivity

USB (virtual serial port) and LAN

interface connections are avail-

able for easy connection to your

company network or direct to you

PC. Use Fluke DAQ application

software for the 2638A or develop

your own interface with the stan-

dard SCPI command set, or use our

Lab View driver or Indusoft Web

Studio to support your specific

application needs.

Category II international

safety ratings

The Hydra Series III is the only

general purpose portable data

acquisition system with an IEC

Category II safety rating to help

protect you and your operators

when making real-world measure-

ments on machinery in industrial

areas. Other data loggers that are

not clearly rated for these types

of category measurements should

be reviewed before being used

for industrial measurement. Fluke

takes your safety and your mea-

surements seriously.

A note on measurement safety

An instrument’s safety ratings should always

be reviewed before performing any electrical

measurement. Data loggers should not be an

exception to that rule.

It is sometimes mistakenly assumed that a

high voltage input specification on a data logger

makes it safe to use on or near industrial equip-

ment or to monitor mains power. This is not

always the case. The Fluke Hydra Series III was

designed specifically to meet stringent CAT II

safety standards.

CAT I

6 Fluke Corporation Fluke 2638A Hydra Series III Data Acquisition System/Digital Multimeter

Data security

If you use your 2638A in a regu-

lated industry, you will appreciate

the data traceability feature option

in the instrument setup menu. This

two level (administrator/authorized

user) system allows an administra-

tor to assign up to five authorized

users. The system provides an

authenticated record of the opera-

tor of any recorded data. Both

setup files and resulting data files

contain the authorized user ID and

timestamp. Guest users may use

an existing secured setup file but

cannot make changes, and any

resulting data file carries the non-

traceable label of “Guest.”

Calibration

The 2638A comes with a factory

test report showing all points

measured during the manufactur-

ing phase. Accredited calibration

certificates are available when

specified at the time of order.

Calibration of the 2638A is

straightforward and only requires a

password to access the calibration

menu from the front panel. The

2638A can be calibrated manually

following the internal menu or

by using automated procedures

with Fluke Calibration MET/CAL®

Calibration Management Software.

Built-in relay maintenance

counter

The key to the isolation and

accuracy of the 2638A in part

comes from the use of high-quality

switching relays inside the unit.

Because these relays do deterio-

rate with extended use, the 2638A

has a maximum relay counter for

each installed relay board. This

will assist a user in anticipating

when replacing the relay board

may be advisable.

Need a large system data

collection network? No

problem!

Need a 200 or 2,000 channel

system? Fluke DAQ application

software (2680A-APSW) makes

it easy to seamlessly collect

data from multiple channels and

mainframes. Version 6.0 or later of

this powerful application software

links all Fluke data acquisition

products (NetDAQ® Networked

Data Acquisition Unit, 2680 Series

Data Acquisition Systems and

Hydra III) into small or large data

collection systems.

If you want to build your own

system, use our LabView driv-

ers. Or use Fluke DAQ software

with the Indusoft WebStudio

HMI software platform to create

a customized, graphical process-

and-communication-interface with

Fluke data acquisition products.

Trend Link Software

extends system capabilities

Optional Trend Link software is

a comprehensive and powerful

trend plotting software package.

It allows you to access, view and

analyze tremendous amounts of

historical and real time data in

a trending or chart recorder-like

display. With Trend Link software,

you can zoom in on points of inter-

est in your data, or zoom out to

display a wide overview of long-

term trends.

Service and CarePlans

The 2638A Hydra Series III ships

with a standard one-year war-

ranty. Extended service plans

for up to four additional years of

coverage (Silver CarePlans) and

annual calibration and repair

services with expedited handling

(Gold CarePlans) are also available

in most countries.

Need a large system data collection network? No problem!

Optional Trend Link software

7 Fluke Corporation Fluke 2638A Hydra Series III Data Acquisition System/Digital Multimeter

Measurement specifications

Accuracy specifications generally are valid for 6.5 digit

resolution mode (unless otherwise noted) after a mini-

mum of one-hour warm-up, and within an operating

temperature range of 18 °C to 28 °C. Derating applies

with a fast sample rate and for operating tempera-

tures outside the limited range. Twenty-four-hour

specifications are relative to calibration standards and

assume a controlled electromagnetic environment per

EN 61326. The confidence level for accuracy specifica-

tions is 95 % within one year of calibration (unless

otherwise noted).

Scan rate Fast 45 channels per second max (0.03 seconds per channel, depending on function and range)

Medium 16 channels per second (0.1 seconds per channel)

Slow 2 channels per second (0.5 seconds per channel)

Custom Selectable from 0.2 NPLC to 200 NPLC

Display resolution 4.5 to 6.5 digits, depending on function and sample rate

Specifications

DC voltage

Maximum input 300 V

Common mode rejection 140 db at 50 Hz or 60 Hz ±0.1 % (1k Ω imbalance)

Normal mode rejection 60 db for NPLC of 1 or greater and power-line frequency ±0.1 %

Measurement method Multi-ramp A/D

A/D linearity 2 ppm of measurement + 1 ppm of range

Input bias current 30 pA at 25 °C

DC voltage input characteristics

Range Resolution Measurement rate/Resolution Input impedance

Fast

4.5 digits

Medium

5.5 digits

Slow

6.5 digits

100 mV 100.0000 mV 10 µV 1 µV 0.1 µV 10 MΩ or >10 GΩ[1]

1 V 1.000000 V 100 µV 10 µV 1 µV 10 MΩ or >10 GΩ[1]

10 V 10.00000 V 1 mV 100 µV 10 µV 10 MΩ or >10 GΩ[1]

100 V 100.0000 V 10 mV 1 mV 100 µV 10 MΩ ±1%

300 V 300.000 V 100 mV 10 mV 1 mV 10 MΩ ±1%

[1] 10 MΩ is default input impedance.

DC voltage accuracy

Accuracy is given as ± (% measurement + % of range).

Range 24 hour (23 ±1 °C) 90 days (23 ±5 °C) 1 year (23 ±5 °C) T.C./ °C outside

18 °C to 28 °C

100 mV 0.0025 + 0.003 0.0025 + 0.0035 0.0037 + 0.0035 0.0005 + 0.0005

1 V 0.0018 + 0.0006 0.0018 + 0.0007 0.0025 + 0.0007 0.0005 + 0.0001

10 V 0.0013 + 0.0004 0.0018 + 0.0005 0.0024 + 0.0005 0.0005 + 0.0001

100 V 0.0018 + 0.0006 0.0027 + 0.0006 0.0038 + 0.0006 0.0005 + 0.0001

300 V 0.0018 + 0.002 0.0031 + 0.002 0.0041 + 0.002 0.0005 + 0.0003

8 Fluke Corporation Fluke 2638A Hydra Series III Data Acquisition System/Digital Multimeter

AC voltage

AC voltage speciﬁcations are for ac sine wave signals >5 % of range. For inputs from 1 % to 5 % of range and <50 kHz,

add an additional error of 0.1 % of range.

Maximum input Front panel: 300 V rms or 425 V peak; Rear inputs: 150 V CAT II; 250 V peak

Measurement method AC-coupled true-rms. Measures the ac component of input with up to 300 V dc bias on any range

AC ﬁlter

bandwidth

Slow 20 Hz

Fast 200 Hz

Maximum crest factor 5:1 at full scale

AC voltage input characteristics

Range Resolution Measurement rate/resolution Input impedance

Fast

4.5 digits

Medium

5.5 digits

Slow

6.5 digits

100 mV 100.0000 mV 10 µV 1 µV 0.1 µV 1 MΩ ±2 % shunted

by 150 pF

1 V 1.000000 V 100 µV 10 µV 1 µV

10 V 10.00000 V 1 mV 100 µV 10 µV

100 V 100.0000 V 10 mV 1 mV 100 µV

300 V 300.000 V 100 mV 10 mV 1 mV

AC voltage accuracy

Accuracy is given as ± (% measurement + % of range).

Range Frequency 24 hour (23 ±1 °C) 90 days (23 ±5 °C) 1 year (23 ±5 °C) T.C./°C outside

18 °C to 28 °C

100 mV 20 Hz to 20 kHz 0.1 + 0.05 0.11 + 0.05 0.11 + 0.05 0.01 + 0.005