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Calibration Adjustment
The Product features closed-case calibration adjustment and uses known reference
sources. The Product measures the applied reference source, calculates correction factors,
and stores the correction factors in nonvolatile memory.
Should the Product fail any of the performance tests, do the calibration adjustment
procedure.
To do the calibration adjustment:
1. Remove the Product battery door. See "Battery Replacement".
2. Apply 3.0 V across the battery contacts on the pca. Note the polarity that is shown in
Figure 6.
3. Turn the rotary switch to the function that you will adjust.
4. Remove the calibration seal.
5. Short across the CAL keypad on the pca and then remove the short. See Figure 6.
This puts the Product into calibration mode.
6. When "C-1.2" is shown on the Product display, apply the correct input signals from
the Calibrator to the Product as shown in Table 5. After confirmation, the Product
goes to the subsequent calibration step.
7. After each step, push the HOLD button to confirm the calibration step and go to the
next step. Set the Calibrator to Standby after you complete adjustment of each
function.
For 323, if any calibration point is missing "Err" is shown on the display.
After you push the HOLD button, wait until the calibration step number
advances before you change the calibrator source. Some adjustment steps
can take several seconds to execute before the Product goes to the
subsequent step.
8. When calibration adjustment is complete, remove the 3.0 V supply. The Product will
automatically exit calibration mode.
9. Replace the batteries and battery door.
Notes
Clamp Meter
Calibration Adjustment
15
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