Fluke Hydra Series II - Temperature Measurements (RTDs); Accuracy

Appendices
Specifications A
A-7
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 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 0.05 0.05 0.47 0.06 0.48
0.00 0.02 0.1 0.08 0.09 0.55 0.13 0.59
100.00 0.02 0.1 0.10 0.10 0.58 0.17 0.64
300.00 0.02 0.1 0.13 0.14 0.65 0.24 0.75
600.00 0.02 0.1 0.19 0.20 0.76 0.36 0.92
* Sensor inaccuracies are not included
Table A-8. Temperature Measurements - Accuracy (RTDs) (IEC751 Amendment 1) (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 0.11 0.11 0.53 0.12 0.54
0.00 0.02 0.1 0.09 0.09 0.55 0.13 0.59
100.00 0.02 0.1 0.11 0.11 0.59 0.18 0.65
300.00 0.02 0.1 0.19 0.20 0.70 0.30 0.81
600.00 0.02 0.1 0.44 0.45 1.01 0.61 1.17
* Sensor inaccuracies are not included