Compliance West CDT-240 Manual

Compliance Products USA, Inc
CAL-CDT-002-PRO CDT-240 V2 Rev 0
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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 CDT-240 V2 Calibration Procedure.
8.0 RELATED ITEMS
8.1 CAL-CDT-002-LOG CDT-240 V2

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CAL-CDT-002-PRO CDT-240 V2 Rev 0
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Appendix 1
CDT-240 Calibration Procedure
1. Component Measurements
1.1.Component measurements are done on board PN:60-684.
1.2.To properly measure the resistors and capacitors use the following settings on your RCL meter:
1.2.1. For resistors use: Parallel mode, 0.25kHz
1.2.2. For capacitors use: Series mode, 1kHz
1.3.To do the measurements, you’ll need to remove jumpers J1-J2 and J5-J6.
1.4.Fill Section 2-1 and 2-2 of CAL-CDT-002-LOG CDT-240 V2 with obtained measurements.
2. Software version verification
2.1.When you turn on your CDT the version software appears at the booting screen, please verify with
Compliance West the latest available version and update it, if applicable.
3. Power Supply Voltage
3.1.Before starting, have a copy ready of CAL-CDT-002-LOG CDT-240 V2, use the specifications given
here in the current document instead of the ones mentioned in the 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. 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.
3.3.Locate TP5 (+5V) and TP6 (AGND) on the main board and connect a DMM between those points.
Adjust the 5VDC output of the power supply to 5.1VDC (-0/+0.04V) by turning VR1 (orange potentiometer)
on the power supply to locate VR1 please refer to Figure 1.
Figure 1. VR1 location (Red circle).

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CAL-CDT-002-PRO CDT-240 V2 Rev 0
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4. Zero Volt Adjustment (P3)
4.1.Set the CDT settings for the following test:
•Trigger on POS
•Delay Test
•Delay: 3.0 s
•Line to Gnd measurement
4.2.Perform a test if necessary so that the CDT is not armed.
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 0.000VDC +/- 2mVDC on DMM1, to get an accurate measurement.
4.5.Record the result on Section 3-1 of CAL-CDT-002-LOG CDT-240 V2.

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CAL-CDT-002-PRO CDT-240 V2 Rev 0
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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):
•Trigger on POS
•Delay Test
•Delay: 3.0 s
•Line to Gnd measurement
5.3.Press TEST once to ARM, and again to perform the test. The test result on the display 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 between +/- 0.8V.
5.4.Edit the test parameters for a negative polarity test:
•Trigger on NEG
•Delay Test
•Delay: 3.0 s
•Line to Gnd measurement
5.5.Press TEST once to ARM, and again to perform the test. Verify that the voltage measurement is 0V +/-
0.8V. Adjust P4 as needed.
5.6.Repeat steps 5.2 –5.5 as needed so that the test result is always as close to 0.0V as possible.
5.7.Record both positive (from 5.3) and negative (from 5.5) results on Section 3-2 of CAL-CDT-002-LOG
CDT-240 V2.
5.8.Return CBX switch to middle position (OFF).

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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
•Voltage Test
•Voltage setting: 50.0 V
•Line to Gnd measurement
6.1.3. Press the test button once to ARM the CDT. You should see a sine wave signal on the oscilloscope
as shown in Figure 4.
Figure 4. Sine Wave Output on CDT-240 BNC.
6.1.4. Without turning off the CDT, unplug the EUT power cord and connect a 60VDC power supply to
“L” and “G”, confirm the voltage with DMM2.
6.1.5. Using DMM1, adjust P5 so that the voltage at TP8 to TP6 (AGND) is -1/39 of the Power supply
voltage (-1.5385 VDC if the voltage is 60VDC). You can see both TP8 & TP6 test points on Figure
5.

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Figure 5. Internal Voltage Measurement Test Points TP6, TP7 y TP8.
6.1.6. Record the result on Section 3-3 (L-G) of CAL-CDT-002-LOG CDT-240 V2.
6.1.6.1. EUT Test Voltage: DMM2 Line to Ground voltage readout.
6.1.6.2. Expected Value:
6.1.6.3. Tolerance: Expected Value +/-1 % of reading.
6.2.Neutral to Ground (P2)
6.2.1. Connect the 60VDC power supply to “N” and “G”, confirm the voltage with DMM2.
6.2.2. Using DMM1, Adjust P2 so that the voltage at TP7 to TP6 is -1/39 of the Power supply voltage (-
1.5385VDC if the voltage is 60VDC). 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
V2.
6.2.3.1. EUT Test Voltage: DMM2 Neutral to Ground voltage readout.
6.2.3.2. Expected Value:
6.2.3.3. Tolerance: Expected Value +/-1 % of reading.
6.3.Line to Neutral (no adjustment - verification only)
6.3.1. Disconnect the DC power supply and plug back the EUT power cord.
6.3.2. Edit the test parameters for a Voltage test:
•Trigger on NEG
•Voltage Test
•Voltage setting: 50.0 V
•Line to Neutral measurement
6.3.3. Press the test button once to ARM the CDT. You should see clean AC sinewave on the oscilloscope
as shown in Figure 4.
6.3.4. Circle Pass on Section 3-3 of CAL-CDT-002-LOG CDT-240 V2 if verification was successful.
__
_39
EUT Test Voltage
Expected value =−
__
_39
EUT Test Voltage
Expected value =−

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CAL-CDT-002-PRO CDT-240 V2 Rev 0
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7. BNC 100:1 Calibration (P1)
7.1.Line to Ground Calibration
7.1.1. Disconnect the scope and connect DMM1 to the BNC 100:1 connector and DMM2 to “L” and
“G”. Set both DMMs to measure AC voltage.
7.1.2. Edit the test parameters for a Voltage test:
•Trigger on NEG
•Voltage Test
•Voltage setting: 50.0V
•Line to Ground measurement
7.1.3. Press TEST once to ARM the CDT.
7.1.4. Adjust P1 so that the voltage on the BNC connector is 1/100 of the EUT test voltage +/- 1% (input
voltage), 1.20V~ if the EUT voltage is 120V~ for example. To read both meters simultaneously
press the “HOLD” button on both meters at the same time (if available).
7.1.5. Record both input voltage and L-G BNC voltage on Section 3-4 of CAL-CDT-002-LOG CDT-
240 V2.
7.1.5.1. EUT Test Voltage: EUT input voltage at moment you are performing the test.
7.1.5.2. Expected Value:
7.1.5.3. Tolerance: Expected Value +/-1 % of reading.
7.2.Neutral to Ground - No adjustment, verification only
7.2.1. Reverse the polarity of the EUT voltage by swapping the EUT power cord from the normal to
reverse plug and reconnect EUT power, do this by swapping LINE with NEUTRAL of the test
voltage input or you can use the CDT-Test Voltage Plug fixture shown in Figure 6.
Figure 6. Normal connection (Right), Reverse connection (Left).
__
_100
EUT Test Voltage
Expected value =
Normal polarity
Reverse polarity

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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.
7.2.4. Record both input voltage and N-G BNC voltage on Section 3-4 of CAL-CDT-002-LOG CDT-
240 V2.
7.2.4.1. EUT Test Voltage: DMM2 Neutral to Ground voltage readout.
7.2.4.2. Expected Value:
7.2.4.3. Tolerance: Expected Value +/-1 % of reading.
7.3.Line to Neutral - No adjustment, verification only
7.3.1. If the EUT connection is reversed, connect as normal Figure 6.
7.3.2. Edit the test parameters for a Voltage test:
•Trigger on NEG
•Voltage Test
•Voltage setting: 50.0 V
•Line to Neutral measurement
7.3.3. Press TEST once to ARM the CDT.
7.3.4. Record both input voltage and L-N BNC voltage on Section 3-4 of CAL-CDT-002-LOG CDT-
240 V2.
7.3.4.1. EUT Test Voltage: DMM2 Line to Neutral voltage readout.
7.3.4.2. Expected Value:
7.3.4.3. Tolerance: Expected Value +/-1 % of reading.
__
_100
EUT Test Voltage
Expected value =
__
_100
EUT Test Voltage
Expected value =

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8. Main Relay (off-board): Disconnect at Peak
8.1.All measurements within +5% of maximum (peak) voltage
+5% = + 18.2° from peak (cos-1(.95))
equates to + 0.84 ms for 60 Hz, + 1.01 ms for 50 Hz
8.2.All measurements are positive peak disconnect (POS) unless otherwise specified. An example of a
very accurate disconnect is shown below in Figure 7.
Figure 7. Example of Sine Wave disconnected on peak.
8.3.To be within 5% of the peak, the disconnect needs to occur in the time between the two vertical red
lines shown below in Figure 8 .
Figure 8. Range accepted for disconnect.

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8.4.Accuracy at 120V, 60 Hz input, Positive peak
8.4.1. Connect an oscilloscope to the 100:1 BNC connector on the front panel of the CDT.
8.4.2. Turn the CBX switch on the back of the CDT to the 1s position.
8.4.3. Set the CDT for the following test:
•Trigger on POS
•Voltage Test
•Voltage setting: 50.0 V
•Line to Gnd measurement
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.
8.4.5.2. Tolerance: Expected Value -5%/+0% of reading.
8.5.Accuracy at 120V, 60Hz input, Negative peak
8.5.1. Set the CDT for the following test:
•Trigger on NEG
•Voltage Test
•Voltage setting: 50.0 V
•Line to Gnd measurement
8.5.2. Perform three tests and confirm that it disconnects within -5%/+0% of peak voltage as specified in
section 8.1.
8.5.3. Circle PASS on Section 3-5 of CAL-CDT-002-LOG CDT-240 V2 if the verification was
successful.
8.5.3.1. Expected Value: Value of previous positive Sine Wave Peak, as it shown it in Figure 7.
8.5.3.2. Tolerance: Expected Value -5% /+0% of reading.

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9. CBX 1 Second RC Time Constant - Voltage Test
9.1.Line to Ground: Time Accuracy
9.1.1. Edit the test parameters for a Voltage test:
•Trigger on POS
•Voltage Test
•Voltage setting: 50.0 V
•Line to Ground measurement
9.1.2. Turn the CBX switch on the back of the CDT to the 1s position and connect an oscilloscope using
a 10X or 100X probe, tip to L and ground to G.
9.1.3. Press the Test button to ARM the CDT, you should see a sinewave on the oscilloscope, now press
test again and the waveform will start to decay, immediately turn the CBX switch to OFF and make
sure it disconnects between 0.7 –0.9 seconds, confirm the oscilloscope time measurement
correspond to the CDT-240 (within +/-0.01s).
9.1.4. Record on Section 3-6 of CAL-CDT-002-LOG CDT-240 V2.
9.1.4.1.Waveform value time: Oscilloscope time measurement from Main relay disconnection
until CBX is unplugged “fast decay”.
9.1.4.2. Tolerance time: Waveform value time +/- 0.01s.
9.1.4.3. As left time: This is the value of the test time result on the CDT-240.
9.2.Neutral to Ground: Voltage Accuracy
9.2.1. Edit the test parameters for a Voltage test:
•Trigger on NEG
•Voltage Test
•Voltage setting: 50.0 V
•Neutral to Ground measurement
9.2.2. Reverse the polarity of the EUT voltage by unplugging the EUT power cord, swap the Line and
Neutral, and reconnect EUT power, as shown in Figure 6.
9.2.3. Turn the CBX switch on the back of the CDT to the 1s position and connect an oscilloscope using
a 10X or 100X probe, tip to N and ground to G.
9.2.4. Perform a test without disconnecting the CAL-BOX, confirm the voltage on the waveform
corresponds to CDT-240 Voltage within ±2% of reading ±0.8V.
9.2.5. Record on Section 3-6 of CAL-CDT-002-LOG CDT-240 V2.
9.2.5.1.Waveform value voltage: Voltage level at CDT-240’s time result. Note: Compensate for
oscilloscope offset.
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.

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10.CBX 1 Second RC Time Constant - Delay Test
10.1. Line to Ground: Voltage Accuracy
10.1.1. Edit the test parameters for a Delay test:
•Trigger on POS
•Delay Test
•Delay setting: 1 second
•Line to Ground measurement
10.1.2. Connect L-G to an oscilloscope using a 10X or 100X probe and turn the CBX switch on
the back of the CDT to the 1s position.
10.1.3. Perform a test and confirm the oscilloscope voltage waveform after 1s of Main relay
disconnection measurement corresponds to the CDT-240 (within ±2% of reading ±0.8V).
10.1.4. Record on Section 3-7 of CAL-CDT-002-LOG CDT-240 V2.
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. Edit the test parameters for a Delay test:
•Trigger on NEG
•Delay Test
•Delay setting: 1 second
•Neutral to Ground measurement
10.2.2. Reverse the polarity of the EUT voltage by unplugging the EUT power cord, swap the Line and
Neutral, and reconnect EUT power, as shown in Figure 6.
10.2.3. Turn the CBX switch on the back of the CDT to the 1s position and connect the 100:1 BNC
output to the oscilloscope.
10.2.4. Perform a test and confirm the oscilloscope time measurement corresponds to the CDT-240
(within +/- 0.01s).
10.2.5. Remove the BNC cable and connect N-G to an oscilloscope using a 10X or 100X probe.
10.2.6. 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).
10.2.7. Record on Section 3-7 of CAL-CDT-002-LOG CDT-240 V2.
10.2.7.1.As left time: Oscilloscope time measurement from BNC start of square pulse until voltage
decay signal appears.
10.2.7.2.Expected value: Voltage level at 1 second. Note: Compensate for oscilloscope offset.
10.2.7.3.Tolerance voltage: Waveform value voltage ±2% of reading ±0.8V.
10.2.7.4.As left voltage: This is the value of the voltage result on the CDT-240.
10.2.8. Return the polarity of the EUT to normal connection.