DCM910 Performance Verification
6
Handheld and Benchtop Instruments Basic Service
Table 6: Test Equipment
Description Minimum Requirements Example Product
AC/DC Current Calibrator >0.5 % accuracy 0 to 400 A
Wavetek
1
with Option
>0.7 % accuracy 400 to 1000 A
2
current
ultiplier coils
Set Up
To prepare for the performance verification checks, do the following.
1. Turn the DCM910 Digital Clamp Meter on.
2. Warm up the meter for 20 minutes.
3. Photocopy the Test Records on pages 9 and 10. Use them to record your test
results.
Verification Procedure
The following checks verify the performance of your DCM910 meter.
WARNING. The following procedures produce magnetic fields that may cause a
malfunction in heart pacemakers or damage to sensitive equipment.
To check the AC current accuracy, perform the following steps.
1. Set the meter function to AC.
2. Select the appropriate coils as necessary to multiply the AC Current
calibrator output to each of the test values given in Table 7 on page 9. For
more information, refer to the user manual of your calibrator.
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 and
record the reading.
5. Disconnect the calibrator.
AC Current Check
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