Compliance Products USA, Inc
CAL-Fac-001-MP-CDT 240 Rev 2.3
Page 7 of 13
6.
BNC 100:1 Calibration (P1)
6.1.
Line to Ground Calibration.
6.1.1.
Disconnect the scope and connect DMM1 Volts AC to the BNC 100:1 connector and DMM2
Volts AC to “L” and “G”.
6.1.2.
Edit the test parameters for a Voltage test:
•
Trigger on NEG
•
Voltage Test
•
Voltage setting: 50.0V
•
Line to Ground measurement
6.1.3.
Press TEST once to ARM the CDT.
6.1.4.
Adjust P1 so that the voltage on the BNC connector is 1/100 of the EUT test v/- 1% (input
voltage), 1.20V~ if the EUT voltage is 120V~ for example. To read both meters simultaneously
press the “HOLD” button on both meters at the same time (if available).
6.1.5.
Record both input voltage and L-G BNC voltage on section 4 of CAL-Log-001-CDT 240.
6.1.5.1.
EUT Test Voltage: EUT input voltage at moment you are performing the test.
6.1.5.2.
Expected Value:
_
_
_
100
EUT Test Voltage
Expected
value
=
6.1.5.3.
Tolerance: Expected Value +/-1 % of reading.
6.2.
Neutral to Ground - No adjustment, verification only.
6.2.1.
Reverse the polarity of the EUT voltage by unplugging the EUT power cord, swap the Line and
Neutral spade lugs on the power connector, and reconnect EUT power, as it shows it in
Figure 7. Normal connection (Left), Reverse connection (Right).
L
L
N
N
