User's Manual

175, 177, & 179

Calibration Information

Calibration Adjustment Procedure

Use the following steps to adjust the Meter’s calibration:

For Meters with a serial number of 84060000 and below, switch the Meter to volts

AC (C). For

Meters with a serial number of 83911001 – 83911240 and 84060001 and above, switch the Meter to

DC.

1. Turn the Meter over and find the Calibration Seal located near the top of the Meter (refer to Figure 4).

2. With a small probe, break the Calibration Seal and press the Calibration Button for 1 second. The

Meter will beep and change to the calibration mode. The display reads C-01, designating the first

calibration step. The Meter remains in calibration mode until the Rotary Function Switch is turned off.

3. Proceed through the calibration steps by entering the input value listed in the table for each step.

Note

When calibrating or measuring AC current, avoid the potential for errors from coupled noise, by either:

1. Shorting the VeG to the COM input

2. Having NO connection to the VeG input.

Note

After pressing the YELLOW button, wait until the step number advances before changing the calibrator

source or turning the Rotary Function Knob.

4. After each input value is applied, press the YELLOW button to accept the value and proceed to the

next step (C-02 and so forth).

5. When the last step in a function is reached, turn the Rotary Function Knob to the next required

function. The Meter will not allow a step to be completed if the Rotary Function Knob is turned to the

wrong function.

Note

If the calibration adjustment procedure is not completed correctly, the Meter will not operate

correctly. When calibration adjustment is not performed correctly, the Meter displays the messages

“CAL” and “Err”and the Meter must be recalibrated.

The Meter is damaged and requires service if:

• “CAL” and “Err” messages continue to appear after a proper recalibration.

• “EEPr” and “Err”messages are alternating on the display.

• “EEPr” message appears on the display.