CL3512A Calibration Procedures

Note: The following calibration procedure should perform only by qualified technicians who have access to the items as following.

Equipment: The class of calibrator had better 10 times greater than the measured meter.

INPUT FUNTION CALIBRATE

1.Before turn on the meter, turn the RANGE knob to position "INPUT" and then move short pin to upper two pin of J5 which is at the left upper of PCB.

2. Input DCV 25.6mV to the T1.After the display is stabilized,then press“ “ key and "0.1" is displayed.

3.Input DCV 74mV then press “ “ key. After the display is stabilized, then press ““ key and "OL" is displayed.

4. Input 0°C (K-type). After the display is stabilized and then press“ “ key.

5.Don't push any key and the meter will turn off automatically after 10 seconds. Move short pin to lower two pin of J5.

6.Turn on the meter then input 0°C (K-type). The display reading reads 0°C if the calibration procedure is right.

“CALIBRATION FUNTION” CALIBRATE
1.Turn the knob "COARSE" right to the end, knob of RANGE turn right to the	last

two position, press "TYPE" key to select "TYPE-E", if display does not show "OL",

then adjust VR4 slowly to make display ="OL" (if “OL” displayed don’t adjust VR4 too far).

CL3512A CALIBRATION PROCEDURES