DCM330 Adjustment Procedures
Handheld and Benchtop Instruments Basic Service
15
4. Position the clamp to the center of the coil.
5. Adjust VR8 until the display reads 396.0. To keep the meter on the lower
range, it may be necessary to cycle the calibrator output off and on.
6. Remove the clamp meter from the coil.
To adjust the AC 1000 A range calibration, perform the following steps.
1. Set the clamp meter to the AC position.
2. Select the appropriate coil to multiply the output of AC current calibrator to
400 A at 400 Hz.
3. Position the clamp around the coil of the DC current calibrator and release
the clamp trigger. Ensure that the clamp is entirely closed.
4. Position the clamp to the center of the coil.
5. Adjust VR7 until the display reads 400.
6. Remove the clamp meter from the coil.
To adjust the peak hold calibration, perform the following steps.
1. Set the clamp meter to the AC position.
2. Short the Peak Hold points indicated in Figure 2.
3. Press PEAK HOLD to activate the function.
4. Adjust VR9 until the display reads 00.0.
5. Remove the short.
6. Press PEAK HOLD to cancel the function.
7. Press PEAK HOLD again to verify that the display reads 00.0.
8. Press PEAK HOLD to cancel the function.
9. Repeat steps 2 through 8 above until the display reads 00.0.
10. Select the appropriate coil to multiply the output of the AC current calibrator
to 200 A at 400 Hz.
11. Position the clamp around the coil of the DC current calibrator and release
the clamp trigger. Ensure that the clamp is entirely closed.
12. Position the clamp to the center of the coil.
13. Adjust VR10 until the display reads 200.0.
AC 1000 A Range
Peak Hold
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