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Compliance West CDT-240 Calibration Procedure
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Compliance West CDT-240 Calibration Procedure

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Compliance Products USA, Inc
CAL-CDT-002-PRO CDT-240 V2 Rev 0
ORIGINATOR:
QUALITY ASSURANCE:
DOCUMENT EFFECTIVE DATE:
1.0
TITLE
Calibration procedure for CDT-240 V2.
2.0
PURPOSE
To describe the CDT-240 V2 calibration procedure.
3.0
DEFINITIONS
DMM - Digital Multimeter
EUT – Equipment under test
4.0
PRECAUTIONS
4.1
The CDT-240 V2 tester can generate 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
5.6
CDT-Test Voltage Plug
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 V2 tester and can explain the procedure and safety concerns.
7.0
APPENDICES
7.1
Appendix 1
8.0
RELATED ITEMS
8.1
CAL-CDT-002-LOG CDT-240 V2
Page 1 of 12
SIGN OFF
CDT-240 V2 Calibration Procedure.
DATE

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Summary of Contents for Compliance West CDT-240

  • Page 1 DMM - Digital Multimeter EUT – Equipment under test PRECAUTIONS The CDT-240 V2 tester can generate high voltage. Be very careful to follow all directions in the procedure. MATERIALS/EQUIPMENT NEEDED Calibrated DMM (Qty 2) DMM1 for voltage RMS below 50V and the DMM2 for voltages RMS 50V or greater.

  • Page 2: Appendix 1 Cdt-240 Calibration Procedure

    LOG. 3.2. Plug in the CDT-240 V2 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.
  • Page 3 4.3. Connect DMM1 to the BNC connector, as shown in Figure 2. Figure 2. BNC – Center (+), Outside (-). 4.4. Adjust P3 so that the output is 0.000V +/- 2mV on DMM1, to get an accurate measurement. 4.5. Record the result on Section 3-1 of CAL-CDT-002-LOG CDT-240 V2.
  • Page 4 5. Time Constant Adjustment (P4) 5.1. Turn the CBX switch on the back of the CDT to the 0.1s position, shown in Figure 3. Figure 3. CDT-240 V2 CBX Switch 5.2. Set the CDT for the following test (same as previous test): •...
  • Page 5 Page 5 of 12 6. Internal Voltage Measurement Accuracy (P5 & P2) 6.1. Line to Ground (P5) 6.1.1. Connect the Oscilloscope to the BNC 100:1 output of the CDT-240. 6.1.2. Edit the test parameters for a Voltage test: • Trigger on NEG •...
  • Page 6 ). You can see both TP7 & TP6 test points on Figure 5. 6.2.3. Record the Neutral to Ground voltage on Section 3-3 (N-G) of CAL-CDT-002-LOG CDT-240 6.2.3.1. EUT Test Voltage: DMM2 Neutral to Ground voltage readout. 6.2.3.2. Expected Value: EUT Test Voltage Expected value = −...
  • Page 7 Compliance Products USA, Inc CAL-CDT-002-PRO CDT-240 V2 Rev 0 Page 7 of 12 7. BNC 100:1 Calibration (P1) 7.1. Line to Ground Calibration Disconnect the scope and connect DMM1 to the BNC 100:1 connector and DMM2 to “L” and 7.1.1.
  • Page 8 Compliance Products USA, Inc CAL-CDT-002-PRO CDT-240 V2 Rev 0 Page 8 of 12 7.2.2. Edit the test parameters for a Voltage test: • Trigger on NEG • Voltage Test • Voltage setting: 50.0V • Neutral to Ground measurement 7.2.3. Press TEST once to ARM the CDT.
  • Page 9 Compliance Products USA, Inc CAL-CDT-002-PRO CDT-240 V2 Rev 0 Page 9 of 12 8. Main Relay (off-board): Disconnect at Peak 8.1. All measurements within +5% of maximum (peak) voltage +5% = + 18.2° from peak (cos (.95)) equates to + 0.84 ms for 60 Hz, + 1.01 ms for 50 Hz 8.2.
  • Page 10 8.4.4. Perform three tests and confirm that it disconnects within -5% /+0% of the peak voltage as specified in Section 8.1. 8.4.5. Circle PASS on Section 3-5 of CAL-CDT-002-LOG CDT-240 V2 if the verification was successful. 8.4.5.1. Expected Value: Value of previous Positive Sine Wave Peak.
  • Page 11 9.2.5.2. Tolerance voltage: Waveform value voltage ±2% of reading ±0.8V. 9.2.5.3. As left voltage: This is the value of the voltage result on the CDT-240 (50V +0V -0.8V). 9.2.6. Return the polarity for the EUT to normal connection.
  • Page 12 10.1.4.1. Expected value: Voltage level at 1s. Note: Compensate for oscilloscope offset. 10.1.4.2. Tolerance voltage: Waveform value voltage ±2% of reading ±0.8V. 10.1.4.3. As left voltage: This is the value of the voltage result on the CDT-240. 10.2. Neutral to Ground: Time and Voltage Accuracy 10.2.1.