3.3 Measuring Temperature
3.3-1 Using Thermocouples
The calibrator supports the following
thermocouple types: B, C, E, J, K, L,
N, R, S, T, U, BP, and XK. The
characteristics of all the types are
described in Specifications section.
The calibrator also has a Cold
Junction Compensation (CJC)
function. Normally this function should be ON and the actual temperature of
the thermocouple will be measured. With CJC OFF, the calibrator will
measure the difference between the thermocouple at the junction and at its
TC input terminal.
Note: CJC off mode should only be used when calibration is being done
using an external ice bath.
To use the thermocouple to measure temperature, follow these steps:
1. Attach the thermocouple leads to the TC miniplug, and insert the plug
into the input/output of the calibrator, as in Figure 7.
Note: For best accuracy wait 2 to 5 minutes for the temperature between
the miniplug and the calibrator to stabilize before any measurements are
taken.
2. Switch to lower display from Main Menu.
3. Select TC from the primary parameters. Choose [IN] in the input/output
control, and than the thermocouple type from the sensor types. The
temperature unit may also be changed from Celsius to Fahrenheit.
The calibrator can also measure the mV of a Thermocouple, which can be
used along with a table in case the corresponding TC type is not supported
by the calibrator. To do so, proceed as above and choose mV from sensor
types.
Figure 7. Measuring Temperature Using Thermocouple Terminals
13
Note: The TC wire
used must match the
thermocouple type
being calibrated.
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