Fluke 2635A, 2625A, 2620A User Manual

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HYDRA

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DATA ACQUISITION UNIT

Data Acquisition

Detailed Specifications

2680A Series - NetDAQ® - Hydra Series

Models 2620A, 2620A/05, 2625A, 2635A

This document provides detailed
specifications for the Fluke
2680A Series, Hydra Series and
NetDAQ data acquisition products.
This is a supplement to the Fluke
Data Acquisition Tools brochure
(1267610). If you wish to
obtain a copy of this product
brochure you may call: in the
U.S.A., (800) 44-FLUKE; Canada,
[phone]; Europe, +31
(0) 40 2 678 200; other countries,
[phone], or contact your
local representative.

Hydra Series

Hydra Series

Channel capacity

Analog inputs: 21
Digital I/0 and alarm outputs:

12 total
Totalizer: 1

Power

90 to 264 Vac, 50 or 60 Hz
(<10W), or 9 to 16 Vdc (<4W)
(If both sources are applied
simultaneously, the greater of
ac or dc is used.) At 120 VAC the
equivalent DC voltage ~14.5V.

Temperature, humidity
(non-condensing)

Operating: 0°C to 28°C, ≤ 90%
RH;

28°C to 40°C,≤ 75% RH;
40°C to 60°C, ≤ 50% RH
Storage: -40°C to 75°C, 5% to
95% RH

Altitude

Operating: 2000 m
Storage: 12000 m

Voltage ratings

300 Vdc or Vac rms (channels
0,1,11); 150 Vdc or Vac rms (all
other inputs) IEC Overvoltage
Category II

Common mode voltage

300V dc or ac rms maximum
from any analog input (channel)
to earth provided that channel
to channel maximum voltage
ratings are observed

Standards

IEC1010, ANSI/ISA-S82.01-1994,
CSA-C22.2 No. 1010.1-92, and
EN61010-1:1993. Complies with
EN 50081-1, EN 50082-1, Vfg.
243/1991 and FCC-15B at the
Class B level, when shielded
cables are used.

Size

9.3 cm H x 21.6 cm

W x

31.2 cm D

Weight

3.0 kg

Interfaces

RS-232

connector: Nine pin male

(DB-9P)

signals: TX, RX, DTR, GND,

CTS,* DSR,* RTS*
modem
control: Full duplex
baud rate: 300, 600, 1200,

2400, 4800,

9600, 19.2k*,

38.4k*

data format: 8 data bits, no

parity, one stop

bit; or 7 data bits,

one parity bit, one

stop bit
parity: Odd, even, none
echo: On/Off
flow control: XON/XOFF, CTS*

* 2635A only

IEEE-488 (Optional, 2620A only)

Disables RS-232 interface while
in use.

Memory life

10 years minimum for real time
clock, setup configuration and
measurement data (from date of
manufacture)

2635A memory card

Type: SRAM type only; PCMCIA
compliant
Capacity: The chart below shows
Memory Card storage capacity in
scans for one data file. One scan
comprises date and time, read­ings from all defined analog input
channels, the status of the four
alarm outputs and eight digital
I/O, and the totalizer count.

Number of scans per card

Memory Channels in scan
Card size 4 10 20

256 kb 8900 4800 2710

512 kb 18250 9840 5560

1 Mb 36860 19860 11210

2 Mb 74110 39910 22550

4 Mb 149039 80251 45359

2625A data memory

Stores 2,047 scans

•

Stored with each scan: time

•

stamp, all defined analog input
channels, the staus of four
alarm outputs and eight digital
I/O, and the totalizer count

Memory life: 5 years minimum;

•

at 25°C

RTD (Pt 100)

Temp.
(°C) Slow Fast Slow Fast

-200°C 0.02 0.1 0.05 0.47
0°C 0.02 0.1 0.09 0.55
100°C 0.02 0.1 0.10 0.58
300°C 0.02 0.1 0.14 0.65
600°C 0.02 0.1 0.20 0.76

Range Slow Fast

15-900 Hz 0.01 Hz 0.1 Hz 0.05 + 2
9 kHz 0.1 Hz 1.0 Hz 0.05 + 1
90 kHz 1 Hz 10 Hz 0.05 + 1
900 kHz 10 Hz 100 Hz 0.05 + 1
1 MHz 100 Hz 1 kHz 0.05 + 1

15 Hz-100 kHz 100 mV rms sine wave

100 kHz-300 kHz 150 mV rms sine wave

300 kHz-1 MHz 2V rms sine wave

Above 1 MHz not specified

Resolution

Frequency

Resolution

Sensitivity

Frequency Level

Accuracy

1,3

±°C

(4-Wire)

Accuracy

(Slow/Fast)

± (%+counts)

Measurement accuracy

1,4

, 3

σσ

σ, ±(%+V)

σσ

1,3

±(%+Ω)

1,2

σσ

σ, (± °C)

σσ

±(%+counts)

DC Voltage Accuracy1, 3

Range

90 mV* 1 µV10 µV.019% + 6 µV .024% + 6 µV .044% + 20 µV
300 mV 10 µV100 µV.018% + 20 µV .023% + 20 µV .040% + 0.2 mV

3V 100 µV1 mV .019% + 0.2 mV .024% + 0.2 mV .041% + 2 mV

30V 1 mV 10 mV .019% + 2 mV .024% + 2 mV .041% + 20 mV

300/150V 10 mV 100 mV .019% + 20 mV .024% + 20 mV .041% + 0.2V

Resistance Accuracy (4-wire)

300Ω 10 mΩ 100 mΩ 0.013% + 20 mΩ 0.014% + 20 mΩ 0.014% + 200 mΩ

3 kΩ 100 mΩ 1Ω 0.015% + 0.2Ω 0.016% + 0.2Ω 0.016% + 2Ω

30 kΩ 1Ω 10 Ω 0.013% + 2Ω 0.014% + 2Ω 0.014% + 20Ω

300 kΩ 10Ω 10 0Ω 0.020% + 20Ω 0.021% + 20Ω 0.021% + 0.2 kΩ

3 MΩ 10 0Ω 1 kΩ 0.059% + 0.2 kΩ 0.063% + 0.2 kΩ 0.063% + 2 kΩ

10 MΩ 1 kΩ 10 kΩ 0.168% + 2 kΩ 0.169% + 2 kΩ 0.709% + 20 kΩ

AC Voltage (True rms, ac coupled) Frequency Accuracy

300 mV 10 µV100 µV 50 Hz-150 Hz 0.3% + 15 0.3% + 4

3V 100 µV1 mV 150 Hz-10 kHz 0.16% + 15 0.16% + 4

30V 1 mV 10 mV 10 kHz-20 kHz 0.37% + 15 0.37% + 4

300/150V 10 mV 100 mV 20 kHz-50 kHz 1.9% + 20 1.9% + 4

Thermocouples

2635A ITS90 18 to 28°C0 to 60°C

Type Temp. (°C)

J -30°C to 150°C 0.37 0.39 0.80 0.57 1.02

K -25°C to 120°C 0.43 0.44 0.93 0.62 1.16

N -25°C to 120°C 0.53 0.55 1.22 0.67 1.39

E -25°C to 350°C 0.38 0.39 0.77 0.61 0.98

T0°C to 120°C 0.45 0.46 0.95 0.59 1.13

R 400°C to 1000°C 0.79 0.81 2.30 1.15 2.53

S1000°C to 1400°C 0.83 0.89 2.34 1.47 2.94

B1200°C to 1550°C 0.74 0.77 2.25 1.18 2.57

C 650°C to 1000°C 0.70 0.76 1.81 1.29 2.38

*2635A only
Note: The terms “slow” and “fast” in these tables refer to the minimum and maximum measurement
speed (Rdgs/s) as listed in the specifications for a specific model.

Resolution Slow Fast

Slow Fast 90 days 1 year 1 year

20 Hz-50 Hz 1.43% + 15 1.43% + 4

50 kHz-100 kHz 5.0% + 50 5.0% + 10

5

90 days 1 year 1 year 1 year 1 year

slow slow fast slow fast

-100°C to -30°C 0.42 0.43 0.91 0.55 1.08

150°C to 760°C 0.44 0.48 0.94 0.88 1.38

-100°C to -25°C 0.52 0.53 1.13 0.65 1.31

120°C to 1000°C 0.61 0.68 1.38 1.28 2.03

1000°C to 1372°C 0.89 0.98 1.87 1.85 2.79

-100°C to -25°C 0.62 0.63 1.44 0.75 1.61

120°C to 410°C 0.47 0.49 1.08 0.69 1.28

410°C to 1300°C 0.70 0.78 1.52 1.45 2.23

-100°C to -25°C 0.44 0.46 0.91 0.57 1.09

350°C to 650°C 0.39 0.43 0.82 0.80 1.23

650°C to 1000°C 0.50 0.56 1.05 1.11 1.63

-150°C to 0°C 0.68 0.69 1.50 0.82 1.71

120°C to 400°C 0.36 0.39 0.78 0.61 1.02
250°C to 400°C 0.83 0.85 2.47 1.02 2.66

1000°C to 1767°C 0.96 1.05 2.59 1.85 3.42

250°C to 1000°C 0.88 0.89 2.60 1.26 2.80

1400°C to 1767°C1.07 1.17 2.96 2.03 3.84

600°C to 1200°C1.111.12 3.53 1.27 3.69

1550°C to 1820°C 0.82 0.89 2.35 1.43 2.90

0°C to 150°C 0.72 0.73 1.90 0.86 2.08

150°C to 650°C 0.62 0.64 1.62 0.99 1.94

1000°C to 1800°C1.121.25 2.86 2.38 4.04

18 00°C to 2316°C1.86 2.08 4.61 4.06 6.66

Accuracy

2 Fluke Corporation Data Acquisition Full Line Specifications

Measurement accuracy cont.

Thermocouples

B1200 to 1550 0.74 0.77 2.25 1.18 2.57

C 650 to 1000 0.70 0.76 1.81 1.29 2.38

1000 to 1800 1.12 1.25 2.86 2.38 4.04

1

Total instrument accuracy for 1 year following calibration (unless otherwise stated). Ambient
operating temperature 18°-28°C (unless otherwise stated). Includes A/D errors, linearization
conformity, initial calibration error, isothermality errors, and reference junction conformity.
(Sensor inaccuracies not included.) Relative humidity up to 90% non-condensing (except up
to 70% for the 300 kΩ, 3 MΩ, and 10 MΩ ranges).

2

Sine wave inputs >2000 counts (slow), >200 counts (fast). Accuracies for crest factor ≤2.0.

3

DIN/IEC 751 only, 4-wire configurations.

4

Resolution is 0.1°C or 0.1°F over the useful range of base metal thermocouples (J, K, T, E, N) and

0.2° resolution for types R, S, B, and C, with slow scan. Fast scan resolution =1°C or F.

5

Open thermocouple detection is performed on each thermocouple channel unless defeated by
computer command. IPTS 68 specifications are published in the user manual.

5

600 to 1200 1.11 1.12 3.53 1.27 3.69

1550 to 1820 0.82 0.89 2.35 1.43 2.90

0 to 150 0.72 0.73 1.90 0.86 2.08

150 to 650 0.62 0.64 1.62 0.99 1.94

18 00 to 2316 1.86 2.08 4.61 4.06 6.66

Accuracy

18 to 28°C0 to 60°C

1,4

σσ

, 3

σ, (± °C)

σσ

Front panel input

DCV, ACV, (300V maximum)
resistance, frequency. Use any
of the Fluke TL Series of test
leads. (One set of TL70 test
leads included with Hydra)

Common mode rejection

AC: ≥120 dB (50/60 Hz, ± 0.1%
max 1 kΩ source imbalance)
DC: ≥120 dB

Normal mode rejection

53 dB (60 Hz, ± 0.1%)
47 dB (50 Hz, ±0.1%)

Scan speed

Slow: 4 readings/second nominal
Fast: 18 readings/second nomi-

nal

(1.5

readings/sec

ond for ACV

and Ω inputs nominal)

Analog to digital converter

Dual Slope type, linear to 17 bits

Totalizing inputs

DC coupled, non-isolated,
max + 30V, min -4V

Max count: 65,535
Minimum signal: 2V peak
Threshold: 1.4V
Rate: 0-5 kHz (debounce off)
Hysteresis: 500 mV
Input debouncing: None or

1.66 ms

Digital inputs

Threshold: 1.4V
Hysteresis: 500 mV
Maximum input: +30V,

min -4V; non-isolated

Digital/Alarm outputs

The open collector output lines
are non-isolated, TTL compat­ible with the following logic
levels:

Logical “zero” output:

0.8V max | out = -1.0 mA
(1 LSTTL load equivalent)

1.8V max, | out = -20 mA

3.25V max, | out = -50 mA

Logical “one” output:

Output voltage depends on
external load

3.8V min, | out = 0.05 mA

(1 LSTTL load equivalent)

Trigger input

Minimum pulse: 5 µs
Maximum latency: 100 ms
Repeatability: 1 ms
Input “High”: 2.0V min, 7.0V max
Input “Low”: -0.6V min, 0.8V max

Non-isolated, contact closure
and TTL compatible

Clock

Accurate to within 1 minute/
month for 0°C to 50°C range

Calibration

Calibration is performed closed­case via software, eliminating
troublesome mechanical adjust­ments. This improves opera­tional reliability by avoiding the
drift caused by vibration, tem­perature, and humidity on con­ventional calibration controls.

Alarms associations

Configured
from 0123 0123 4 567

Front panel ch0 ch1 ch2 ch3 digital inputs ch4 ch5 ch6 ch7

Computer ch0 ch1 ch2 ch3

Alarm outputs Digital I/O

(Fixed) ch8 ch9 ch10 ch11

ch12 ch13 ch14 ch15

ch16/20 ch17 ch18 ch19

(Fixed) Each Digital I/O may be randomly assigned as a digital

input, status output, or alarm output (associated with any
input channel or channels), except ch 0-3

Data Acquisition Full Line Specifications Fluke Corporation 3

2640A

100, 50, 6 readings/second

•

18 bit A/D resolves 0.3 µV

•

and .02°C
300V maximum measurement

•

input
Built-in signal conditioning

•

Real time on-board clock

•

-20 to 60°C (-4 to 140°F) oper-

•

ating temperature

2645A

1000, 200, 48 readings/second

•

16 bit A/D resolves 3 µV

•

and 0.2°C
50V maximum measurement

•

input
Built-in signal conditioning

•

Real time on-board clock

•

-20 to 60°C (-4 to 140°F)

•

operating temperature

NetDAQ® Series

Models 2640A and 2645A

NetDAQ Series

Channel capacity

Analog inputs: 20
Computed channels: 10
Digital I/O and alarm outputs:

8 total
Totalizer: 1

Math functions

In addition to its 20 analog input
channels, each NetDAQ unit sup­ports 10 computed channels.
Calculations include: addition,
subtraction, multiplication, divi­sion, log, natural log, exponent,
square root, absolute value, inte­ger function, and average.

Measurement speed (2640A)

Slow: 6 readings/second nominal
Medium: 41 (50 Hz), 48 (60 Hz)

readings/sec
Fast: 143
nominal (5
VAC nominal, 140
secon
ings/sec

ond nominal

readings/sec

readings/sec

d on 300Ω range, 37

ond on 3 MΩ range)

ond

ond for

readings/

read-

Measurement speed (2645A)

Slow: 45 (50 Hz), 54 (60 Hz)
readings/sec
Medium: 200
nominal
Fast: 1000
nominal (5
VAC nominal, 370
sec

ond on 300Ω range, 44

readings/sec

Analog to digital converter

2640A: Multi-slope type, linear
to 18 bits
2645A: Multi-slope type, linear
to 16 bits

Common mode rejection

2640A:

AC: ≥120 dB (50/60 Hz, ±0.1%
max 1kΩ source imbalance)
DC: ≥120 dB

2645A:

AC: ≥100 dB (50/60 Hz, ±0.1%
max 1kΩ source imbalance)
DC: ≥100 dB

ond nominal

readings/sec

readings/sec
readings/sec

readings/

ond on 3 MΩ range)

ond

ond
ond for

Normal mode rejection

50 dB @ 50/60 Hz, ± 0.1%

Common mode voltage
maximum

2640A: 300 VDC or VAC rms
(channels 1,11); 150 VDC or
VAC rms (all other channels)
2645A: 50 VDC or 30 VAC rms
(all channels)

4 Fluke Corporation Data Acquisition Full Line Specifications