Spectrum Controls 1769sc-IF8u - Manual (Page 77)

Appendix A: Specifications: 67
Thermocouple Type B +/- 0.7 °C
Thermocouple Type C +/- 0.2 °C
Millivolt Inputs +/- 3 uV
Voltage Inputs +/- 150 mV
Current Inputs +/- 0.3 uA
RTD/Resistance
Platinum 385
+/- 0.02 °C
Platinum 3916 +/- 0.02 °C
Copper +/- 0.1 °C
Nickel +/- 0.01 °C
Nickel-Iron +/- 0.01 °C
0-150 ohm +/- 5 mΩ
0-1000 ohm +/- 15 mΩ
0-3000 ohm +/- 50 mΩ
Temp. Coefficient Temperature compensation done by periodic calibration.
Data formats Eng units, Eng units X10, Scaled for PID, Prop. Counts, Percent of Full Scale
Input Filter 10 Hz, 50 Hz, 60 Hz, 250 Hz, 500 Hz, 1kHz
Channel Update Time
Single Channel Min Voltage/Current/RTD/Resistance input: 7 ms with 1 kHz filter, no cal
Thermocouple input: 14 ms with 1 kHz filter, no cal
Single Channel Max Voltage/Current/RTD/Resistance input: 303 ms with 10 Hz filter, no cal
Thermocouple input: 606 ms with 10 Hz filter, no cal
8 Channel Min Voltage/Current/RTD/Resistance inputs only: 56 ms with 1 kHz filter, no cal
Thermocouple or mixed inputs: 63 ms with 1 kHz filter, no cal
8 Channel Max Voltage/Current/RTD/Resistance inputs only: 2424 ms with 10 Hz filter, no cal
Thermocouple or mixed inputs: 2727 ms with 10 Hz filter, no cal
Open Circuit Detection Time 7 ms – 2.1 seconds*
*Open circuit detection time is equal to the channel update time
Input Over-voltage Protection +/- 30 VDC Continuous
Input Over-Current Protection +/- 28 mA DC Continuous
Isolation
Channel to Rack 707 VDC for 1 minute Optical & magnetic
Channel to Channel +/-10V
Cable Impedance 25 ohms maximum for specified accuracy.
Input Protection Voltage Mode +/- 30VDC continuous
Max Current input is limited due to input impedance (28mA max)
Power Requirements
Internal rack +5V 150 mA maximum
Internal rack +24V 45 mA maximum
Fusing None
1
These accuracies were measured without CJC compensation.
2
To determine the overall accuracy, you must add the CJC
accuracy to each thermocouple type. For example, if you are using
a J thermocouple you would need to add ±3 degrees C, which
calculates to ±3.6 degrees C overall. To improve accuracy, use a
remote terminal block configuration. For more details refer to
chapter 2.