Compliance Products USA, Inc
CAL-Fac-001-MP-CDT 240 Rev 2.3
Page 13 of 13
9.3.3.
Connect N-G to 1s time constant terminals “A” and “B” of CAL-BOX and the 100:1 BNC output
to the oscilloscope.
9.3.4.
Perform a test and confirm the oscilloscope time measurement corresponds to the CDT-240
(/- 0.01s).
9.3.5.
Remove the BNC cable and connect to N-G an oscilloscope using a 10X or 100X probe.
9.3.6.
Perform a test and confirm the oscilloscope voltage waveform after 1 second of Main relay
disconnection measurement corresponds to the CDT-240 (within ±2% of reading ±0.8V).
9.3.7.
Record on section 7 of CAL-Log-001-CDT 240.
9.3.7.1.
As left time: Oscilloscope time measurement from BNC start of square pulse until
voltage decay signal appears.
9.3.7.2.
Expected value: Voltage level at 1 second. Note: Compensate for oscilloscope offset.
9.3.7.3.
Tolerance voltage: Waveform value voltage ±2% of reading ±0.8V.
9.3.7.4.
As left voltage: This is the value of the voltage result on the CDT-240.
9.3.8.
Return the polarity of the EUT to normal connection.
