DCM330 Performance Verification
8
Handheld and Benchtop Instruments Basic Service
To check the frequency accuracy, perform the following steps.
1. Set the meter function to Hz.
2. Select the appropriate coil as necessary to multiply the AC Current calibrator
output to 20 A.
3. Position the clamp around the current loop of the AC current calibrator and
release the clamp trigger. Ensure that the clamp is entirely closed.
4. Verify that the display reads within the specified Low and High Limits for
each of the frequencies listed in Table 9 on page 10 and record the reading.
5. Disconnect the calibrator.
Frequency Check
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