CP030 Current Probe
10
922173-00 Rev A
Check LF Accuracy
Figure 1. LF Accuracy Test set up.
1.
Set the Function generator to 50 Hz sine wave. Output voltage at 3 Vrms with 50
Ω
output.
2.
Remove the CP030 from the oscilloscope and reconnect using the ProBus extension cable.
Connect the BNC male connector of the ProBus extension to DMM #1 using a BNC Female to
Dual Banana adapter.
3.
Using Banana Patch cords and the BNC to Dual Banana Plug adapter, connect the ’V Source’ and
’V Return’ terminals of the 100 Turn Calibration Loop to the output of the Function Generator.
4.
Connect the Current Sense terminals of the 100 Turn Calibration Loop to the voltage inputs of
DMM #2.
5.
Set both DMMs to measure AC Volt.
6.
With the CP030 removed from any signal and the slider returned to the LOCKED position,
degauss the probe by pressing the
DEGAUSS
button (located in the CP030 dialog), then
OK
.
7.
Open the CP030 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 measured at the ’Current Sense’
terminals (DMM #2) reads 50 mV ±0.05 mV. (This corresponds to 10 A at the probe head).
9.
Record the voltage measured by DMM #1 on the Test Record.
10.
Verify that the measured voltage is between 0.989 volt and 1.011 volt.
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