Compliance Products USA, Inc
CAL-Fac-001-MP-CDT 240 Rev 2.3
Page 5 of 13
5.
Internal Voltage Measurement Accuracy (P5 & P2).
5.1.
Line to Ground (P5)
5.1.1.
Connect the Oscilloscope to the BNC 100:1 output of the CDT-240.
5.1.2.
Edit the test parameters for a Voltage test:
•
Trigger on NEG
•
Voltage Test
•
Voltage setting: 50.0 V
•
Line to Gnd measurement
5.1.3.
Press the test button once to ARM the CDT. You should see a sine wave signal on the oscilloscope
as it shows it in
Figure 5. Sine Wave Output on CDT-240 BNC.
5.1.4.
Unplug the EUT power cord and connect a 60V
DC
power supply to “L” and “G”, confirm the
voltage with DMM2.
5.1.5.
Using DMM1, adjust P5 so that the voltage at TP8 to AGND “TP6” is -1/39 of the Power supply
voltage (-1.5385 V
DC
if the voltage is 60V
DC
for example). You can see both TP8 & TP6 test
points on Figure 6.
