12
2565 Precision Thermocouple Module
NOTE:
An Application Note for use of Tungsten-Rhenium and other
thermocouples is available at www.hartscientific.com.
This section explains the features and operation of the optional 2565 Precision
Thermocouple Module.
12.1
Description
The 2565 Precision Thermocouple Module is an add-on module that allows the
1560 to measure temperature with extreme accuracy using thermocouples. Two
thermocouples can be connected to the 2565 simultaneously and measured al-
ternately. The module’s unique clamping receptacles accept thermocouples ter-
minated with either bare wires or subminiature thermocouple plugs. Sensors
inside the receptacles measure temperature for precise automatic cold-junction
compensation. For even greater accuracy, the 2565 also allows you to use an
external cold-junction reference.
12.2
Specifications
Voltage range
0 to 100 mV
Voltage accuracy, one-year
1
0 to 50 mV
50 to 100 mV
0.002 mV
40 ppm of reading
Voltage accuracy, short-term
1,2
0 to 50 mV
50 to 100 mV
0.0015 mV
30 ppm of reading
Internal CJC accuracy
1
0.05°C (0.09°F)
Temperature accuracy, external CJC
1,3
Type E @ 800°C
Type J @ 1000°C
Type K @ 1200°C
Type N @ 1200°C
Type S @ 1400°C
Type T @ 300°C
Type Au/Pt @ 1000°C
±0.025°C (0.045°F)
±0.039°C (0.070°F)
±0.055°C (0.10°F)
±0.054°C (0.098°F)
±0.17°C (0.31°F)
±0.035°C (0.063°F)
±0.078°C (0.14°F)
Temperature accuracy, internal CJC
1,3
Type E @ 800°C
Type J @ 1000°C
Type K @ 1200°C
Type N @ 1200°C
Type S @ 1400°C
Type T @ 300°C
Type Au/Pt @ 1000°C
±0.065°C (0.12°F)
±0.083°C (0.15°F)
±0.10°C (0.18°F)
±0.090°C (0.16°F)
±0.19°C (0.35°F)
±0.070°C (0.13°F)
±0.092°C (0.17°F)
Voltage temperature coefficient
1
5 ppm/°C
(2.8 ppm/°F)
147
12 2565 Precision Thermocouple Module
Description
