Channel Configuration; Compatible Thermocouple Sensors; Accuracy; Thermocouple Measurement Accuracy - Measurement Computing TC-32 User Manual

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TC-32 User's Guide
When thermocouple sensors are connected to different common mode voltages, the channels with
Note 2:
floating thermocouples sensors will be biased to approximately the average value of the applied
common mode voltages. Each of the applied common mode voltages must then be less than or equal to
the average common mode voltage ±1.40 V or [CMV
Measurement sensitivity is the smallest change in temperature that can be detected.
Note 3:

Channel configuration

Sensor Category
Thermocouple
Channel configuration is stored on EEPROM external to the isolated microcontroller by the firmware
Note 4:
whenever any item is modified. Modification is performed by commands issued from an external
application, and the configuration is made non-volatile through the use of the EEPROM.

Compatible thermocouple sensors

Parameter
Thermocouple

Accuracy

Thermocouple measurement accuracy

Table 4. Thermocouple accuracy specifications, including CJC measurement error. All specifications are (±).
Sensor Sensor
Type Temperature
(°C)
–210
J 0
1200
–210
K 0
1372
–50
S 250
1768
–50
R 250
1768
250
B 700
1820
–200
E 0
1000
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Table 2. Channel configuration specification
Condition
J, K, S, R, B, E, T, N
Table 3. Compatible sensor type specifications
Specification
J: –210 °C to 1200 °C
K: –270 °C to 1372 °C
R: –50 °C to 1768 °C
S: –50 °C to 1768 °C
T: –270 °C to 400 °C
N: –270 °C to 1300 °C
E: –270 °C to 1000 °C
B: 0 °C to 1820 °C
Accuracy Error Accuracy Error
Maximum (°C), Typical (°C),
15°C to 35°C 15°C to 35°C
1.965 0.910
0.787 0.361
0.752 0.371
2.295 1.061
0.821 0.376
1.029 0.504
2.467 1.111
1.835 0.825
0.893 0.361
2.609 1.174
1.862 0.837
0.754 0.305
2.450 1.090
0.937 0.424
0.610 0.300
1.754 0.811
0.775 0.355
0.657 0.323
19
≤ (CMV
±1.4 V)].
applied average
Specification
32 differential channels
Accuracy Error
Maximum (°C),
0°C to 45°C
2.167
0.816
1.148
2.520
0.852
1.560
2.655
1.961
1.519
2.810
1.992
1.346
2.707
1.136
1.056
1.933
0.806
0.989
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Specifications
Accuracy Error
Typical (°C),
0°C to 45°C
0.989
0.375
0.508
1.152
0.392
0.688
1.223
0.904
0.590
1.293
0.918
0.520
1.254
0.520
0.467
0.880
0.369
0.437