Brainchild C21 User Manual page 60

Perform step 1 stated above , then press scroll key until the
display shows
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 fails.
This setup is performed in a
it is recommended to use a computer to perform the
procedures.
Input modification Input modification
*
voltage voltage
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
T/C, RTD, 0~60mV
0 ~ 5V, 1 ~ 5V
0~20mA, 4~20mA
2. Perform
3. Perform
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.
*
Final step Final step
Step 8. Step 8. Set the LOCK value to your desired function. Set the LOCK value to your desired function.
59
and
or a linear current linear current
0 ~ 1 V
0 ~ 10 V
Step 1 Step 1 and Step 2 Step 2
Step 3 Step 3 but send a span signal to the input terminals
. Press scroll key for at least 5 seconds.
high temperature chamber, high temperature chamber,
recalibration recalibration procedures for a
input:
RA RB
X
61.9K 3.92K
324K 3.92K
649K 3.92K
39W 3.01W
to calibrate the linear input zero.
UM0C911C
R60
X 3.3K
X
X
X
X
hence
linear linear