Brainchild C21 User Manual page 57

Manual Calibration Procedures Manual Calibration Procedures
Perform step 1 to enter calibration mode.
*
Set the Lock parameter to the unlocked condition ( LOCK=
Step 1. Step 1.
NONE).
Press and hold the scroll key until
display, then release the scroll key.
Press the scroll key for 2 seconds then release,the display
will show
Perform step 2 to calibrate Zero of A to D converter and
*
step 3 to calibrate gain of A to D converter.
Step 2. Step 2. Short the thermocouple inpt terminals , then 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 -199.9 or 199.9, then the
calibration fails.
Step 3. Step 3. Press scroll key until the display shows
mV signal to the thermocouple input terminals in correct
polarity . 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
-199.9 or 199.9, then the calibration fails.
* Perform both steps 4 and 5 to calibrate RTD function ( if
required ) for input .
and the unit enters calibration mode .
UM0C911C
appears on the
. Send a 60
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