Fluke Hydra Series II User Manual page 219

Input Impedance
100 MΩ minimum in parallel with 150 pF maximum
Common Mode and Normal Mode Rejection
See the specifications for dc voltage measurements.
Cross-Talk Rejection
Refer to Appendix B.
Open Thermocouple Detect
Small ac signal injection and detection scheme before each measurement detects greater
than 1 to 4 kΩ as open. Performed on each channel unless defeated by computer
command
Temperature Measurements (RTDs)
Accuracy
See Table A-7, A-8 and A-9.
Table A-7. Temperature Measurements - Accuracy (RTDs) (IEC751 Amendment 2) (ITS-90)
RTD
Temperature Resolution
(°C) Slow
-200.00 0.02
0.00 0.02
100.00 0.02
300.00 0.02
600.00 0.02
* Sensor inaccuracies are not included
Table A-8. Temperature Measurements - Accuracy (RTDs) (IEC751 Amendment 1) (ITS-90)
RTD
Temperature
(°C) Slow
-200.00
0.00
100.00
300.00
600.00
* Sensor inaccuracies are not included
4-Wire Accuracy* (±°C)
Fast 90 Day
Slow
0.1 0.05
0.1 0.08
0.1 0.10
0.1 0.13
0.1 0.19
Resolution
Fast 90 Day
Slow
0.02 0.1 0.11
0.02 0.1 0.09
0.02 0.1 0.11
0.02 0.1 0.19
0.02 0.1 0.44
18°C to 28°C
1 Year 1 Year
Slow Fast
0.05 0.47
0.09 0.55
0.10 0.58
0.14 0.65
0.20 0.76
4-Wire Accuracy* (±°C)
18°C to 28°C
1 Year 1 Year
Slow Fast
0.11 0.53
0.09 0.55
0.11 0.59
0.20 0.70
0.45 1.01
Appendices
Specifications
0°C to 60°C
1 Year 1 Year
Slow Fast
0.06 0.48
0.13 0.59
0.17 0.64
0.24 0.75
0.36 0.92
0°C to 60°C
1 Year 1
Slow Year
Fast
0.12 0.54
0.13 0.59
0.18 0.65
0.30 0.81
0.61 1.17
A
A-7