Measurement
3-9
IM CA500-01EN
3
Input Terminal
Set whether to use the TC-A terminal (dedicated thermocouple mini plug) or TC-B terminal.
If you select TC-A, you cannot use an external RJ sensor (sold separately).
When using the TC-B, we recommend that you use the included binding post (99045).
Turning Reference Junction Compensation (RJC) On and Off
When using the TC-B terminal (banana terminal), set whether to perform RJC (ON/OFF).
ON: If an external RJ sensor is connected, the external RJ sensor is used to perform
reference junction compensation.
If an external RJ sensor is not connected, the internal RJ sensor is used to perform
reference junction compensation.
OFF: Reference junction compensation is not performed.
When the TC-A terminal is used, the internal temperature sensor is always used to perform
reference junction compensation.
Note
• The internal RJ sensor measures the temperature of the instrument’s terminal.
• When the temperature inside the instrument is high, wait for the temperature to decrease before use.
• For the external RJ sensor, use the 90080 RJ sensor, sold separately.
Burnout
When burnout detection is turned on, the instrument detects burnouts in the thermocouple circuit
and displays “B.OUT (Burnout)” on the screen.
Temperature Scale
You can select from the following temperature scales.
IPTS-68: The international temperature scale standard of 1968
ITS-90: The international temperature scale standard of 1990
Notes about Measurement
If you perform a temperature measurement or temperature source using an RJC immediately after
using loop power or simulating 20 mA, the measured value or source value may be affected by the
temperature rise inside the instrument. Wait for the temperature inside instrument to stabilize before
using it.
3.4 Temperature Measurement Using Thermocouples
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