Testing a 150 VA High Current Source
D-2 72A-2337-01 Rev. B 11/05
NOTE All current measurements are made with the Julie shunts. A differential amplifier with a gain of
10 is used to boost the shunt output for distortion measurements.
Testing a 150 VA High Current Source
To perform the Amplitude and Distortion check on a 150 VA High Current source:
1. Click User Defined on the F6300 Configuration display in ProTesT to configure the F6300
for three 150 VA Currents.
2. Set the number of Current Sources to 3.
3. Set the range to 7.5 A and amplitude to 7.5 A. Connect an ammeter or appropriate shunt
across the Source I1 output terminals, and turn the source ON.
4. Verify that the amplitude is within limits and the total harmonic distortion (THD) is <2%.
5. Change the amplitude as shown in Table D.2 and verify that the amplitude and distortion are
within the limits.
6. Repeat step 5 for the 15 and 30 A range.
7. Repeat steps 3, 4, 5, and 6 for Source I2 and I3.
NOTE The load including wire and connections must not exceed the Max. Load in Table D.2.
Table D.2 lists the specifications for the 150 VA High Current Source measurements. Minimum
and maximum amplitudes are given in amperes. When using a four-terminal shunt, convert the
values to the appropriate voltages.
Table D.2 150 VA High Current Source Measurements Specifications
Max. Load Range Value Minimum Maximum Max. THD
2.67 Ohm 7.5 A 7.5 A 7.48 A 7.523 A 2%
0.75 A 0.748 A 0.7523 A 2%
0.67 Ohm 15 A 15.0 A 14.96 A 15.05 A 2%
1.5 A 1.496 A 1.505 A 2%
0.167 Ohm 30 A 30.0 A 29.91 A 30.09 A 2%
3.0 A 2.991 A 3.009 A 2%
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