background image

Compliance Products USA, Inc 
CAL-Fac-001-MP-CDT 240 Rev 2.3   

 

Page 1 of 13 

 
 

SIGN OFF 

DATE 

ORIGINATOR: 

 

QUALITY ASSURANCE: 

 

DOCUMENT EFFECTIVE DATE: 

 

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 
 

 

Summary of Contents for CDT-240

Page 1: ...IALS 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...

Page 2: ...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 disco...

Page 3: ...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 C...

Page 4: ...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 tes...

Page 5: ...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...

Page 6: ...f the voltage is 60VDC for example You can see both TP7 TP6 test points on Figure 6 5 2 3 Record the Neutral to Ground voltage on section 3 N G of CAL Log 001 CDT 240 5 2 3 1 EUT Test Voltage DMM2 Neu...

Page 7: ...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 o...

Page 8: ...EUT Test Voltage Expected value 6 2 4 3 Tolerance Expected Value 1 of reading 6 3 Line to Neutral No adjustment verification only 6 3 1 If the EUT connection is reverse connect as normal Figure 7 6 3...

Page 9: ...84 ms for 60 Hz 1 01 ms for 50 Hz 7 2 All measurements are positive peak disconnect POS unless otherwise specified An example of a very accurate disconnect is shown below in Figure 8 Figure 8 Example...

Page 10: ...tion was successful 7 4 5 1 Expected Value Value of previous Positive Sine Wave Peak 7 4 5 2 Tolerance Expected Value 5 0 of reading 7 5 Accuracy at 120V 60Hz input NEG peak 7 5 1 Connect a scope to t...

Page 11: ...he test time result on the CDT 240 8 2 Neutral to Ground Voltage Accuracy 8 2 1 Edit the test parameters for a Voltage test Trigger on NEG Voltage Test Voltage setting 50 0 V Neutral to Ground measure...

Page 12: ...uracy 9 2 1 Edit the test parameters for a Delay test Trigger on POS Delay Test Delay setting 1 second Line to Neutral measurement 9 2 2 Connect L N to 1s time constant terminals A and B of CAL BOX an...

Page 13: ...onfirm 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...

Reviews: