Compliance West CDT-240 Use and care manual

Compliance Products USA, Inc
CAL-Fac-001-MP-CDT 240 Rev 2.3 Page 1 of 13
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1.0 TITLE
Calibration procedure for CDT-240.
2.0 PURPOSE
To describe the CDT-240 calibration procedure.
3.0 DEFINITIONS
DMM - Digital Multimeter
CAL-BOX - Calibration Box (00-CDT-CBX)
4.0 PRECAUTIONS
4.1 The CDT-240 tester is capable of generating high voltage. Be very careful to follow all
directions in the procedure.
5.0 MATERIALS/EQUIPMENT NEEDED
5.1 Calibrated DMM (Qty 2) DMM1 for voltage RMS below 50V and the DMM2 for
voltages RMS 50V or greater.
5.2 Calibrated Oscilloscope ( with 10x or 100x probe )
5.3 DC power supply 60V
5.4 BNC cable, 1:1 ratio
5.5 Screwdrivers
6.0 PROCEDURE
6.1 Once a technician has been trained on this procedure by an appropriate person, follow the
directions listed in Appendix 1.
6.2 An appropriate person shall be any technician that has performed the calibration of a
CDT-240 tester and can explain the procedure and safety concerns.
7.0 APPENDICES
7.1 Appendix 1 CDT-240 Factory Calibration Procedure.
8.0 RELATED ITEMS
8.1 CAL-Log-001-CDT 240
8.2 CBX1V Video

Compliance Products USA, Inc
CAL-Fac-001-MP-CDT 240 Rev 2.3 Page 2 of 13
Appendix 1
CDT-240 Factory Calibration Procedure.
1. Software version verification.
1.1. When you turn on your CDT the version software appears at the booting screen, please verify with
Compliance West the latest version and update it, if applies.
2. Power Supply Voltage.
2.1. Before starting, pull the traveler for the product being calibrated and have a copy ready of CAL-Log-
001-CDT 240, use the specifications given here in the current document instead of mentioned CAL-
Log.
2.2. Plug in the CDT-240 power cord, plug in the EUT power cord to the proper value (90 –260V
50/60Hz), disconnect all the test leads attached to G, L or N outputs, disconnect any power cord
attached to the front panel socket. Turn the unit ON, then perform a relay calibration pressing TEST
once is prompt it on the display. Note that the EUT power source could be grounded or floated.
2.3. Adjust the 5VDC output of the power supply to 5.1VDC (-0/+0.04V) by turning VR1 (orange
potentiometer) on the power supply while measuring the output voltage of the supply TP5 (+5V) to
TP6 (AGND) on the main board, in order to locate VR1 please refer to Figure 1.
Figure 1. VR1 location (Red circle).

Compliance Products USA, Inc
CAL-Fac-001-MP-CDT 240 Rev 2.3 Page 3 of 13
3. Zero Volt Adjustment (P3).
3.1. Connect the Oscilloscope to the BNC 100:1 output of the CDT-240.
3.2. Set the CDT for the following test:
•Trigger on POS
•Delay Test
•Delay: 3.0 s
•Line to Gnd measurement
3.3. Perform a test if necessary so that the CDT is not armed. The oscilloscope should measure 0V on the
BNC connector we expect to get same as Figure 2, adjust P3 in order to set this value.
Figure 2. Zero output on BNC connector with CDT-240 not armed.
3.4. Disconnect the oscilloscope and connect DMM1 to the BNC connector, as it shows it in Figure 3.
Figure 3. BNC –Center (+) , Outside (-).
3.5. Adjust P3 so that the output is 0.000VDC +/- 2mVDC on DMM1, in order to get an accurate
measurement.
3.6. Record the result on section 1 of CAL-Log-001-CDT 240.

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.
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 fluctuate +/- 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.

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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.
Figure 5. Sine Wave Output on CDT-240 BNC.
5.1.4. Unplug the EUT power cord and connect a 60VDC 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 VDC if the voltage is 60VDC for example). You can see both TP8 & TP6 test
points on Figure 6.