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Step 4: Calibrate
Setup the equipment same as step 3. The unit under
calibration is power in a still-air room with temperature 50A3
BC. Stay at least 20 minutes for warming up. The calibrator
source is set at 0.00 BC with internal compensation mode.
Press
moment. If the display didn't blink, then the calibration fails.
Step 5: Calibrate
Send a 100 ohms signal to terminal 3, 4 and 5 according to
Figure 5-3
100 ohms
Press
moment. If the display didn't blink, then the calibration fails.
Step 6: Calibrate
Change the ohm's value of the calibrator to 300 ohms. Press
for at least 4 seconds. The display will blink a moment.
If the display didn't blink, then the calibration fails.
Input modification
*
voltage
1. Remove R61(3.3K) and install two 1/4 W resistors RA and RB
on the control board with the recommended values specified
in the following table.
The low temperature coefficient resistors with A1% A50ppm
should be used for RA and RB.
46
gain
of
cold junction
for at least 4 seconds. The display will blink a
RTD reference voltage
.
1
2
3
4
5
for at least 4 seconds. The display will blink a
RTD serial resistance
and
or a
linear current
UM0L911C
.
.
6
7
8
9
10
.
recalibration
procedures for a
input:
Figure 5-3
RTD Calibration
linear
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