Chapter 5 Calibration; Figure 5.2 Cold Junction Calibration Setup - Brainchild C21 User Manual

5520A 5520A
Calibrator Calibrator
K-TC
Figure 5.2 Figure 5.2
Cold Junction Calibration Setup Cold Junction Calibration Setup
The 5520A calibrator is configured as K type thermocouple output The 5520A calibrator is configured as K type thermocouple output
with internal compensation. Send a 0.00 C signal to the unit under with internal compensation. Send a 0.00 C signal to the unit under
calibration. calibration.
The unit under calibration is powered in a still-air room with
temperature 25 3 C. Stay at least 20 minutes for warming
up. Perform step 1 stated above, then press scroll key until
the display shows
40.00.
Press scroll key for at least 5 seconds. The display will blink a
moment and a new value is obtained . Otherwise , if the
display didn't blink or if the obtained value is equal to -5.00 or
40.00, then the calibration fails.
Perform step 7 to calibrate
*
if required.
Step 7. Step 7. Setup the equipments same as step 6. The unit under
calibration is powered in a still-air room with temperature
A B A B
3 C. 3 C.
calibrator source is set at 0.00 C with internal compensation
mode.
A B
Stay at least 20 minutes for warming up . The
UM0C911C
C21 C91
K+
9
10
K
Stay at least 20 minutes in still- Stay at least 20 minutes in still-
air room air room
room temperature 25 room temperature 25
L L
. Press up/down key to obtain
gain gain of cold junction cold junction
B
4
5
A A L L
3 C 3 C
compensation
50 50
58