Instructions

Adjustment Procedure
CP031-OM-E Rev B ISSUED: September 2005 6-3
Figure 6-1. LF Accuracy Adjustment Set Up
4. Connect the Current Sense terminals of the 100 Turn Calibra-
tion Loop to the voltage inputs of DMM #2
5. Set both DMMs to measure AC Volt.
6. With the CP031 removed from any signal and the slider
returned to the LOCKED position, degauss the probe by
pressing the DEGAUSS button on the oscilloscope, (located
in the CP031 dialog), then pressing OK.
7. Open the CP031 slider and position the probe input around
the 100 Turn loop. Close and LOCK the slider.
8. Adjust the Function Generator voltage until the voltage mea-
sured at the 'Current Sense' terminals (DMM #2) is 50 mV ±
0.05 mV. (This corresponds to 10 A at the probe head).
9. Adjust VR202 on the PCB until the voltage measured on
DMM #1 is as close to 2X the voltage measured on DMM #2.
10. Verify that the measured voltage is between 0.990 V and
1.01 V.
11. Disconnect the probe from the test setup.