IM CA71-E
4-9
Source
4
4.4 Sourcing Thermocouple (TC) Signals
4.4.1 When RJ Sensor Is Used
(Making Use of Reference Junction Compensation)
To calibrate a device with built-in reference junction temperature
compensation by sourcing a thermoelectromotive force with
the calibrator without using any external 0°C reference junction
compensation means, use the optional RJ sensor (P/N: B9108WA).
CAUTION
When sourcing thermocouple signals, the CA71 outputs a small DC voltage.
If the device under calibration has a switching power supply, its switching
noise may affect the CA71 output. Taking measures such as connecting the
device to ground can reduce its noise, resulting in less effect on the CA71.
(This caution also applies to the CA51.)
Step 1: Insert the RJ sensor into the R.J.INPUT connector of the
calibrator. Insert the sensor until the locking claw in the
bottom of the sensor connector locks with a click.
To unplug the sensor connector, unlock the connector by
gently pushing the locking claw.
Step 2: Using the function selector switch, select
.
Step 3: Using the
key, select the type of thermocouple.
Select the type from K, J, E, T, R, B, S, N, L and U.
The selected type of thermocouple is shown on the LCD.
Step 4: When the RJ sensor is connected, the calibrator goes into
the RJ ON status and the RJON symbol appears on the LCD.
4.4 Sourcing Thermocouple (TC) Signals
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