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Step 2: Calibrate
Send a span signal to terminal 4 and 5 with correct polarity.
The span signal is 60 mV for thermocouple input, 1V for
0-1V input, 10V for 0-10V input and 20mA for 0-20 mA input.
Press
moment. If the display didn't blink, then the calibration fails.
Step 3: Calibrate
Setup the equipment according to the following diagram
for calibrating the cold junction compensation. Note that a
K type thermocouple must be used.
5520A
Calibrator
K-TC
The 5520A calibrator is configured as K type thermocouple output
with internal compensation. Send a 0.00 BC signal to the unit under
calibration.
The unit under calibration is powered in a still-air room with
25A3 BC
temperature
Press
for at least 4 seconds. The display will blink a moment.
If the display didn't blink, then the calibration fails.
Gain
of A to D converter.
for at least 4 seconds. The display will blink a
offset
of
cold junction
. Stay at least 20 minutes for warming up.
UM0L911C
.
Figure 5-2
Cold Junction
Calibration Setup
K+
4
5
K
Stay at least 20 minutes in still-
air room
room temperature 25 A 3 LC
L 9 1
45
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