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140 AII 330 00
Thermocouple/Millivolt Module Specifications
The following table shows the specifications for the Thermocouple/Millivolt module.
Number of Channels
8 IN
TC Types and Ranges
Types J K E T S R B
Ranges (° C) -210 ... +760
-270 ... +1370
-270 ... +1000
-270 ... +400
-50 ... +1665
-50 ... +1665
+130 ... +1820
Millivolt Ranges
-100 mV ... +100 mV*
-25 mV ... +25 mV*
*Open circuit detect can be disabled on these ranges
TC Circuit Resistance/Max
Source Resistance
200 ohms max for rated accuracy
Input Impedance
>1M ohms
Input Filter
Single low pass @ nominal 20 Hz. Plus notch filter at 50/60
Hz
Normal Noise Rejection
120 dB min @ 50 or 60 Hz
Cold Junction Compensation
(CJC)
Internal CJC operates 0 ... 60° C (errors are included in the
accuracy specification). The connector door must be
closed. Remote CJC can be implemented by connecting
the TC (which monitors the external junction block
temperature) to channel 1. Types J, K, and T are
recommended for best accuracy.
Resolution
TC Ranges
Choice of: 1 degree C (Default) 0.1 degree C 1 degree F
0.1 degree F
Millivolt Ranges
+/- 100 mV range, 3.05 microvolts (16 bits)
+/- 25 mV range, 0.76 microvolts (16 bits)
TC Absolute Accuracy (see Note 1)
Types J, K, E, T (see Note 2)
+/- 2° C +/- 0.1% of reading
Types S, R, B (see Note 3)
+/- 4° C +/- 0.1% of reading
Millivolt Absolute Accuracy
@ 25° C
+/- 20 microvolts +/- 0.1% of reading
Accuracy Drift w/ Temperature 0.15 microvolts/° C + 0.0015% of reading/° C max.
Isolation
530
Channel to Channel
None
Channel to Bus
1780 VAC @ 47-63 Hz or 2500 VDC for 1 min.
35010516 05/2010