Calibration; Keypad Interface - Fluke 87 IV Series Service Manual

87 & 89 Series IV
Service Manual

Calibration

Calibrate the Meter once a year to ensure that it performs to specifications.
Before you begin the calibration procedure, locate the recessed calibration button on the
back of the Meter, underneath the accessory mount. It is inside a small opening covered
by a seal. Carefully puncture the seal with a calibration tool to access the calibration
button. See Figure 5.

Keypad Interface

To start the calibration procedure, turn the rotary switch to the DC mV position, then
press and hold the recessed calibration button on the back of the Meter for one second.
This places the Meter in calibration mode as shown on the display in Figure 6. The unit
will remain in the calibration mode until the rotary switch is moved to the
22
Figure 5. Locating Recessed Calibration Button
Calibration Button
position.
OFF
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