Compliance Products USA, Inc
CAL-Fac-001-MP-CDT 240 Rev 2.3
Page 4 of 13
4.
Time Constant Adjustment (P4).
4.1.
Connect the L and G front panel test jacks across the RC time constant CAL-BOX, 0.1s terminals “C”
and “D” as shown in
Figure 4. CDT-240 with CAL-BOX attached.
4.2.
Set the CDT for the following test (same as previous test):
•
Trigger on POS
•
Delay Test
•
Delay: 3.0 s
•
Line to Gnd measurement
4.3.
Press TEST once to ARM, and again to perform the test. The test result should be 0.0V (because the
voltage decayed to zero in 3s). Adjust P4 as needed so that the measured voltage is 0.0V (turning the
potentiometer clockwise makes the reading lower, i.e. more negative. Repeat the test multiple times to
verify. The reading may flu/- 0.8V.
4.4.
Edit the test parameters for a negative polarity test:
•
Trigger on NEG
•
Delay Test
•
Delay: 3.0 s
•
Line to Gnd measurement
4.5.
Verify that the voltage measurement is 0V +/- 0.8V. Adjust P4 as needed.
4.6.
Repeat steps 4.2 – 4.5 as needed so that the test result is always as close to 0.0V as possible.
4.7.
Record both positive (as 4.3) and negative (as 4.5) results on section 3 of CAL-Log-001-CDT 240.
4.8.
Disconnect the CAL-BOX.
