Input impedance, Common mode and normal mode rejection, Cross-talk rejection – Fluke 2625A User Manual

Page 157: Open thermocouple detect, Rtd inputs, Type

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Appendices

Specifications

A

A-5

Input Impedance

100 M

minimum in parallel with 150 pF maximum

Common Mode and Normal Mode Rejection

See Specifications, DC Voltage Inputs

Cross-Talk Rejection

Refer to Appendix D

Open Thermocouple Detect

Small ac signal injection and detection scheme before each measurement detects greater
than 1 to 4 k

as open. Performed on each channel unless defeated by computer

command.

RTD Inputs

Type

DIN/IEC 751, 100

e Platinum (385)

IEC 751, Amendment 1, 100

e

Platinum (IPTS-68)

RTD 4 Wire Accuracy* (±°C)

Temperature Resolution 18°C to 28°C 0°C to 60°C

(°C) Slow Fast 90 Day

Slow

1 Year

Slow

1 Year

Fast

1 Year

Slow

1 Year

Fast

-200.00 0.02 0.1 0.06 0.06 0.48 0.07 0.49

0.00 0.02 0.1 0.09 0.09 0.55 0.13 0.59

100.00 0.02 0.1 0.10 0.11 0.58 0.17 0.64

300.00 0.02 0.1 0.14 0.14 0.65 0.24 0.75

600.00 0.02 0.1 0.19 0.20 0.76 0.37 0.93

* Sensor inaccuracies are not included

IEC 751, Amendment 1, 100

e

Platinum (ITS-90)

RTD 4 Wire Accuracy* (±°C)

Temperature Resolution 18°C to 28°C 0°C to 60°C

(°C) Slow Fast 90 Day

Slow

1 Year

Slow

1 Year

Fast

1 Year

Slow

1 Year

Fast

-200.00 0.02 0.1 0.06 0.06 0.48 0.07 0.49

0.00 0.02 0.1 0.09 0.09 0.55 0.13 0.59

100.00 0.02 0.1 0.13 0.13 0.60 0.19 0.67

300.00 0.02 0.1 0.17 0.18 0.69 0.28 0.79

600.00 0.02 0.1 0.30 0.31 0.87 0.48 1.04

* Sensor inaccuracies are not included

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