Calibration Error Messages; Calibration Adjustment Procedure - Fluke 771 Calibration Manual

Calibration Button

Calibration Error Messages

Table 4 lists the calibration error messages that can be shown on the Meter
display. The suggested actions to eliminate messages are also listed.
Error
Message
The difference between the input level and the zero
CAL ERR1 point is less than the minimal threshold when
performing low range and high range adjustments.
CAL ERR2 Calibration parameter checksum failure.
CAL ERR3 Code checksum failure.

Calibration Adjustment Procedure

Allow the Meter to stabilize to room temperature before beginning the calibration
adjustment.
To prepare for adjustment:
1. Remove the battery door and calibration seal.
2. Clamp the current loop in the current flow direction where required.
3. Turn the meter on and wait at least 10 seconds for warming up.
4. Press the hidden calibration button with a probe to enter calibration mode.
See Figure 4.
If the Jaw Assembly has been replaced, do the Phase Adjustment
Procedure before you continue.
Figure 4. Accessing the Calibration Button
Table 4. Error Messages
Cause of Error
Note
Milliamp Process Clamp Meter
Calibration Adjustment
Suggested Action
Check current loop and ensure
correct current is generated.
Execute all adjustments
including temperature and
phase.
The Meter requires repair.
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