Tektronix DCM300, Technical Reference

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DCM300 and DCM320 Performance Verification
6
Handheld and Benchtop Instruments Basic Service
Table 6: Test Equipment
Description Minimum Requirements Example Product
AC Current Calibrator >0.5% accuracy, 0 to 400 A Wavetek 9100 with option 200
m
>0.7% accuracy, 400 to 600 A
current multiplier coils or Fluke
5500A with Wavetek X10 and
AC Voltage Calibrator >0.2% accuracy
5500A with Wavetek X10 and
X50 Current multiplier Coils
Resistance Calibrator >0.3% accuracy
Set Up
To prepare for the performance verification checks, do the following.
1. Turn the DCM300/DCM320 Digital Clamp Multimeter on by sliding the
function switch to any position other than OFF.
2. Warm up the instrument for 20 minutes.
3. Photocopy the Test Records on pages 8 and 9. Use them to record your test
results.
Verification Procedure
The following checks verify the performance of your DCM300 or DCM320
multimeter.
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 multimeter function switch to the
A
position.
2. Set up the AC Current calibrator to output the values specified in Table 7 on
page 8.
3. Select the appropriate coils to multiply the AC Current calibrator output for
each of the values listed in Table 7.
4. For each of the conditions listed in Table 7, position the clamp around the
current loop of the AC current calibrator and release the clamp trigger.
Ensure that the clamp is entirely closed.
AC Current Check