FLUKE 771 User Manual for the Fluke 771 Milliamp Process Clamp Meter

Loading ...

Milliamp Process Clamp Meter

Calibration Adjustment

Adjustment Subroutines

The Meter features closed-case calibration adjustment using a known reference source.

The Meter measures the applied reference source, calculates correction factors, and stores

the correction factors in nonvolatile memory.

There are four adjustment subroutines in the Meter adjustment procedure:

• Low Range (±20 mA)

• High range (±100 mA)

• Temperature

• Phase

Note

Temperature adjustment should always be performed prior to performing

the other adjustment routines. The phase adjustment routine is ONLY

required if the unit is repaired or the current clamp is replaced.

Front Panel Operation for Adjustment

Use a small probe to press the calibration button once to enter the Meter’s calibration

mode. The calibration button is usually covered by the factory calibration seal. A second

press of the button saves new calibration constants and exits calibration mode.

See Figure 4.

In calibration mode, C is used to select subroutines: low range, high range, temperature,

or phase. A short press of C (<1 second) will toggle between low and high range

subroutines. A long press (>1 second) will toggle between temperature and phase

subroutines.

• Pressing A is valid for all subroutines and normal operation. Pressing A will

zero the reading.

• In the low and high range subroutines, H and L are used to adjust the negative

and positive gain of the range.

• In the temperature subroutine, only H is valid for adjustment.

• In the phase subroutine, H and L are used to adjust the phase of two

sensor-excitation signals by increasing or decreasing a parameter.

1.888.610.7664 sales@GlobalTestSupply.com

Fluke-Direct.com

Loading ...

FLUKE 771 Milliamp Process Clamp Meter