CAS CT100 Series, Service Manual, Page: 12 / 67

12
B. SPAN
* And then, it goes to “Fine Calibration” mode.
In this mode you can use the '4' key to decrease the value of the both calibration
constants at the same time and '5' key to decrease them. That makes the offset on
the SPAN value.
Use '7' key to decrease the value of second calibration constant only and key '8' to
increase it.
That makes the proportional change of the value.
If A is the first calibration constant and B is the second the formula is:
internal = A + B*X
where X is the row ADC value..
③
press key again. The machine finished Zero
adjustment. And then it beeps and saves the value. The
display will show “LoAd” message and the value of “Load A/D”.
①
Press to move to SPAN calibration mode. And then
Press key. The display shows ADC value in internal
resolution (0~60000) on XXXXX.
④
Place full capacity on the platter.
Press key. If the value of A/D remains stable for a while
the display will be shown “CAL” with beep.