Teledyne LeCroy AP015 - Manual (Page 13)

Operator’s Manual
922254-00 Rev A 9
6. Open the AP015 slider and position the probe input around the 50 Turn
loop. Close and LOCK the slider.
7. Set the oscilloscope channel vertical scale to 20 A/div.
8. With the power supply set to 0 V, press the 'Null' button of the
multimeter measuring the probe voltage to subtract the probe's offset
voltage from the measurement. (If the multimeter being used does not
have this capability, the offset value can be manually subtracted from
the probe output values recorded below.)
9. Increase the power supply voltage until the voltage measured at the
'Current Sense' terminals (DMM #2) is approximately 150 mV. (This
corresponds to 15 A at the probe head).
10. Record the exact value (a) of the current sense voltage measured with
DMM #2 on the test record line marked '15 A Current Sense,' and (b) the
probe output voltage measured with DMM #1 on the line marked '15 A
Probe Output.'
11. Multiply the value recorded for '15 A Current Sense' by 10, and record
this value on the line labeled '15 A Current'.
12. Calculate the percentage difference between the probe output voltage
and the actual current using the equation 100 * (b - c)/c. Record this
value on the line marked '15 A Accuracy.'
13. Verify that the 15 A Accuracy is < ±1%.
14. Increase the power supply voltage until the voltage measured at the
'Current Sense' terminals is approximately 300 mV. (This corresponds to
30 A at the probe head).
15. Record the exact value (d) of the current sense voltage on the test
record line marked '30 A Current Sense,' and (e) the probe output
voltage on the line marked '30 A Probe Output.'
16. Multiply the value recorded for '30 A Current Sense' by 10, and record
this value on the line labeled '30 A Current.'
17. Calculate the percentage difference between the probe output voltage
and the actual current using the equation 100 * (e - f)/f. Record this
value on the line marked '30 A Accuracy.'