SMFT-1000
Calibration Manual
34
Setup #2
To v e r i f y :
1. Set all equipment and the DUT to standby mode.
2. Connect the leads, see Figure 14.
3. Connect the leads from the current clamp to the DMM, yellow clamp lead to INPUT red port
on the 8808A, and black clamp lead to INPUT black port on 8808A.
4. Connect test leads from 552xA AUX port to the positive (red) terminal of the 25-turn coil
and from the AUX LO port to the negative (black) terminal of the 25-turn coil.
5. Clamp the current clamp through the designated area of the 25-turn coil.
6. Be sure to center the current clamp.
7. Set the 8808A DMM to DC Volts mode and to the Slow measurement mode.
8. Use the dial on the clamp to zero the clamp reading on the DMM.
The voltage reading on the clamp will swing up and down. The absolute value of the voltage
reading should not exceed 0.7 mV while the value swings. If it does, continue to adjust the
zero dial on the clamp until the voltage reading stays within 0.7 mV of 0 V over the course of
10 seconds.
9. Set the 552xA calibrator to output and complete the test points (see Ta bl e 1 3 ):
Note
The 552xA setting will be 1/25
th
the test point value.
10. Push OPER on the 552xA to set the operate mode, if necessary, and wait for the calibrator
to stabilize.
11. Record the voltage indication on the DMM
÷10 in the test record.
12. Set the 552xA calibrator and complete test points in Ta bl e 1 3 for Setup #2 in order of
operations from the table. See Hysteresis.
13. Push OPER on the 552xA to set the operate mode, if necessary, and wait for the calibrator
to stabilize.
14. Record the voltage indication on the DMM
÷10 in the test record.
Note
This conversion only works when reading the DMM indication in millivolts, not volts.
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