Milliamp Process Clamp Meter
Calibration Adjustment
11
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.
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Weight and Dimensions
