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Digital Multimeters

Calibration Adjustments

Other Pushbutton Functions

Table 4 list the button on the Meter and describes what the button does when pressed

after the password has been entered and  pressed.

Table 4. Pushbutton Functions During Cal Mode

Button Cal Mode Description



(yellow)

Press and hold to test the present function. The measurement is not calibrated so it may be

inaccurate. This is normal.

 Press and hold to display the required input level.

 Press and hold to display the frequency of the input signal.

 Press to store the new calibration adjustment value and advance to the next step. This

pushbutton is also used to exit calibration adjustment mode after the calibration adjustment

sequence is complete.

Calibration Adjustment Procedure

In the following procedure, some adjustment steps take longer to execute than others (10

to 15 Seconds). For some of these steps the Meter gives a double beep to indicate

completion. Not all steps have this feature.

1. Turn the rotary switch of the Meter from OFF to  while holding down  at

the same time. The Meter should display  CAL.

2. Press  once to see the number of calibrations that have been completed. Press

 again to enable password entry. The Meter should display "????".

3. Use the keypad pushbuttons to enter the existing password and press . The

Meter should display Y .

4. Apply the value listed in Table 5 or 6 for each calibration step, and/or (optional)

press the  to display the required input signal level and press  to display

the required input signal frequency.

Note

After pressing , wait until the step number advances before changing

the calibrator source or turning the rotary switch of the Meter. If the

reference source input is not within an anticipated range of the required

value, the Meter will emit a double beep and not allow completion of the

step. Set the calibrator to standby prior to changing the function switch

position and or after completing adjustment of each function. If the

calibration adjustment is not completed correctly, the Meter will not

operate correctly.

Fluke 27-II Calibration Information

Other manuals for Fluke 27-II