Perform step 1 stated above , then press scroll key until the
display shows . Press
the
scroll key for at least 3
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 -199.9 or 199.9, then the calibration
faile
d
.
This setup is performed in a high temperature chamber, hence
it is recommended to use a computer to perform the
procedures.
Final step
Step 8.
Set the LOCK value to your desired function.
Input modification and recalibration procedures for a linear
voltage or a linear current input:
1. Remove R60(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 should be used for
RA and RB.
Input Function
RA
RB
R60
T/C, RTD, 0~60mV
61.9K
3.92K
3.3K
0 ~ 1 V
0 ~ 5V, 1 ~ 5V
0 ~ 10 V
0~20mA, 4~20mA
324K
649K
39
ohm
3.92K
3.92K
3.01
ohm
X
X
X
X
X
X
2. Perform Step 1 and Step 2 to calibrate the linear input zero.
3. Perform Step 3 but send a span signal to the input terminals
instead of 60mV. The span signal is 1V for 0~1V input, 5V for
0~5V or 1~5V input, 10V for 0~10V input and 20mA for
0~20mA or 4~20mA input.
52