Teledyne Lecroy CP500 User manual

Instruction
Manual
CP500 Current Probe

CP500 Current Probe
Instruction Manual
January 2013

700 Chestnut Ridge Road
Chestnut Ridge, NY, 10977-6499
Tel: [phone]
Fax: [phone]
teledynelecroy.com
© 2013 Teledyne LeCroy, Inc. All rights reserved.
Unauthorized duplication of Teledyne LeCroy documentation materials other than for internal sales and
distribution purposes is strictly prohibited. However, clients are encouraged to distribute and duplicate Teledyne
LeCroy documentation for their own internal educational purposes.
WaveRunner, WavePro, and Teledyne LeCroy are registered trademarks of Teledyne LeCroy, Inc. Windows is a
registered trademark of Microsoft Corporation. Other product or brand names are trademarks or requested
trademarks of their respective holders. Information in this publication supersedes all earlier versions.
Specifications are subject to change without notice.
Warranty
Teledyne Lecroy warrants this oscilloscope accessory for normal use and operation within specification for a period
of one year from the date of shipment. Spare parts, replacement parts and repairs are warranted for 90 days.
In exercising its warranty, Teledyne Lecroy, at its option, will either repair or replace any assembly returned within
its warranty period to the Customer Service Department or an authorized service center. However, this will be
done only if the product is determined by Teledyne Lecroy’s examination to be defective due to workmanship or
materials, and the defect is not caused by misuse, neglect, accident, abnormal conditions of operation, or damage
resulting from attempted repair or modifications by a non-authorized service facility.
The customer will be responsible for the transportation and insurance charges for the return of products to the
service facility. Teledyne Lecroy will return all products under warranty with transportation charges prepaid.
This warranty replaces all other warranties, expressed or implied, including but not limited to any implied warranty
of merchantability, fitness or adequacy for any particular purposes or use. Teledyne Lecroy shall not be liable for
any special, incidental, or consequential damages, whether in contract or otherwise.
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Instruction Manual
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TABLE OF CONTENTS
Safety Instructions..........................................................................................................................................................1
Symbols.................................................................................................................................................................... 1
Precautions............................................................................................................................................................... 1
Operating Environment............................................................................................................................................. 2
Overview ........................................................................................................................................................................3
Description................................................................................................................................................................ 3
Key Features............................................................................................................................................................. 3
Accessories............................................................................................................................................................... 3
Operation........................................................................................................................................................................4
Precautions............................................................................................................................................................... 4
Connecting the Probe to the Test Instrument............................................................................................................ 4
Connecting the Probe to the Test Circuit .................................................................................................................. 4
Operation with a Teledyne LeCroy Oscilloscope ...................................................................................................... 5
Bandwidth Limit......................................................................................................................................................... 5
AC Coupling.............................................................................................................................................................. 5
Auto Zero.................................................................................................................................................................. 5
Degauss Probe......................................................................................................................................................... 5
Insertion Impedance ................................................................................................................................................. 6
Care and Maintenance...................................................................................................................................................7
Cleaning.................................................................................................................................................................... 7
Cleaning Core Surfaces............................................................................................................................................ 7
Calibration Interval.................................................................................................................................................... 7
Service Strategy........................................................................................................................................................ 8
Troubleshooting........................................................................................................................................................ 8
Returning a Defective Probe ..........................................................................................................................................9
Performance Verification..............................................................................................................................................10
Test Equipment Required ....................................................................................................................................... 10
Preliminary Procedure............................................................................................................................................. 11

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Functional Check.................................................................................................................................................... 11
Check LF Accuracy................................................................................................................................................. 12
Adjustment Procedure..................................................................................................................................................13
Test Equipment Required ....................................................................................................................................... 13
Preliminary Procedure............................................................................................................................................. 14
Adjust LF Accuracy................................................................................................................................................. 15
Specifications...............................................................................................................................................................16
Nominal Characteristics.......................................................................................................................................... 16
Warranted Characteristics....................................................................................................................................... 16
Typical Characteristics............................................................................................................................................ 17
Environmental Characteristics ................................................................................................................................ 17
Physical Characteristics.......................................................................................................................................... 18
Graphs..........................................................................................................................................................................19
Certifications.................................................................................................................................................................20
EMC Compliance.................................................................................................................................................... 20
EC Declaration of Conformity - EMC.................................................................................................................. 20
Australia & New Zealand Declaration of Conformity—EMC ............................................................................... 20
Safety Compliance.................................................................................................................................................. 21
EC Declaration of Conformity –Low Voltage...................................................................................................... 21
Environmental Compliance..................................................................................................................................... 21
End-Of-Life Handling.......................................................................................................................................... 21
Restriction of Hazardous Substances (RoHS).................................................................................................... 21
Contact Teledyne LeCroy.............................................................................................................................................22
Appendix A...................................................................................................................................................................23
Performance Verification Test Record .................................................................................................................... 23
Equipment Used ..................................................................................................................................................... 23
CP500 Test Record ................................................................................................................................................ 23

Instruction Manual
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Safety Instructions
This section contains instructions that must be observed to keep this oscilloscope accessory operating in
a correct and safe condition. You are required to follow generally accepted safety procedures in addition
to the precautions specified in this section.
The overall safety of any system incorporating this accessory is the responsibility of the assembler of
the system.
Symbols
These symbols may appear on the probe body or in this manual to alert you to important safety
considerations.
WARNING. High Voltage, risk of electric shock.
CAUTION. Potential for damage to probe or instrument it is connected to. Attend to the accompanying
information to protect against personal injury or damage. Do not proceed until conditions are fully understood
and met.
ELECTROSTATIC DISCHARGE (ESD) HAZARD. The probe is susceptible to damage if anti-static measures
are not taken.
DOUBLE INSULATION
PROTECTIVE (EARTH) TERMINAL
Precautions
Connect and disconnect properly. Connect probe to the measurement instrument before
connecting the test leads to a circuit/signal being tested.
Use only within operational environment listed. Do not use in wet or explosive atmospheres.
Use indoors only.
Keep product surfaces clean and dry.
Be careful with sharp tips. The tips may cause bodily injury if not handled properly.
Do not operate with suspected failures. Do not use the probe if any part is damaged. Cease
operation immediately and sequester the probe from inadvertent use.
Be careful not to damage the insulation surface when making measurements.

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Never install or remove the probe on bare conductors which are energized. The transformer
core and shield are grounded but not insulated and may contact the conductor when the locking
lever is open.
To avoid short circuits and accidents that could result in injury or death, use the CP500 current
probe only with conductors carrying 600 V (CAT II) or 300 V (CAT III) or less.
To prevent short circuits and electric shock when conductors being measured carry less than
600 V (CAT II) or 300 V (CAT III), but more than the safe voltage level (SELV-E) make sure that the
conductors to be measured are insulated with material conforming to:
oOvervoltage Category III, basic insulation requirement for working voltage of 300 V
oPollution degree 2
Operating Environment
The accessory is intended for indoor use and should be operated in a clean, dry environment. Before
using this product, ensure that its operating environment is maintained within these parameters:
Temperature: 0° to 40° C
Humidity: ≤ 80% relative humidity (non-condensing)
Altitude: up to 2000 m (6562 feet)

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Overview
Description
The CP500 uses a combination of Hall effect and transformer technology which enables measurements
to be made on DC, AC and impulse currents. It has a 2 MHz bandwidth and is designed to measure
continuous currents up to 500 Amp.
The probe can be used with a WaveRunner, WavePro, or LC series oscilloscope with firmware 4.3.0.0 or
higher. With the ProBus interface, the CP500 becomes an integral part of the oscilloscope. The
bandwidth limit, auto zero and degauss functions are all controlled from the oscilloscope’s graphical
user interface. The oscilloscope provides power to the probe, so no external power supply is needed.
Key Features
• Highly accurate current measurements
• Easy current measurements
• Wide bandwidth
• Compact
• Over-current protected
Accessories
Certificate of Calibration
Instruction Manual CP500-OM-E

CP500 Current Probe
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Operation
Precautions
The sensor head is a precision assembly consisting of a molded component with a ferrite core and a Hall
effect element. It may be damaged if subjected to sudden changes in temperature, mechanical strain or
shock.
The mating surfaces of the sensor are precision ground and should be treated with care. If there is any
type of dust or dirt on the mating surfaces of the sensor head, measurements may be impaired.
Accurate measurements may not be possible in locations subject to strong magnetic fields such as
transformers and high-current conductors, or in locations subject to strong external electric fields.
Connecting the Probe to the Test Instrument
The CP500 probe has been designed for use with the WaveRunner, WavePro and LC series Teledyne
Lecroy oscilloscopes equipped with the ProBus interface. Attach the probe output connector to the
oscilloscope input connector. The oscilloscope will recognize the probe, set the oscilloscope input
termination to 1 MΩ and activate the probe control functions in the user interface.
Connecting the Probe to the Test Circuit
The CP500 has been designed with a movable split core, eliminating the need to break the conductor for
the core to slip around the conductor.
To connect:
1. Pull the locking lever, so that the clamp opens.
2. Align the sensor so that the current direction indicator corresponds to the direction of current
flow in the conductor.
3. Press the probe jaws together around the conductor until the jaws click shut.
4. Slide the locking lever on the sensor head towards the front of the probe until the "UNLOCK”
indication disappears and the "LOCK" indication appears.
NOTE: Never use this probe on bare conductors. The core and shield are grounded and any voltage
applied to the conductor may cause damage the probe or the circuit under test.

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Operation with a Teledyne LeCroy Oscilloscope
The probe can be controlled through the Vertical Setup dialog for the channel to which the probe is
connected.
Turning the VOLTS/DIV knob will control the oscilloscope’s scale factor to give full dynamic range.
The CP500 probe dialog (a tab behind the channel setup dialog) allows for the selection of the probe’s
coupling (DC, Grounded or AC), AUTO ZERO, DEGAUSS PROBE and Probe BWL functions, limiting the
system bandwidth to 20 MHz or maximum bandwidth (BWL Off).
Bandwidth Limit
The CP500 is capable of switching the bandwidth from Full (maximum bandwidth) to 20 MHz by
selecting the bandwidth adjustment on the CP500 dialog.
AC Coupling
DC, Ground or AC coupling can be selected through the CP500 dialog. AC coupling occurs at the input of
the oscilloscope and not at the probe input. When using the CP500 in the AC coupling mode and
measuring AC signals with a DC component, care must be taken to assure that the dynamic range of the
probe will not be exceeded. There will be no warning if the dynamic range is exceeded. If clipping of the
waveform occurs, check to see if the operating range of the probe has been exceeded. This can be done
by changing the coupling back to DC and setting the scale factor to the maximum Amp/Div.
Auto Zero
The CP500 incorporates an Auto Zero function to remove the DC offset from the current probe. Auto
Zero must be invoked by the user. After several minutes of warm-up, or when the probe is exposed to a
large shift in ambient temperature, some DC offset drift may occur. To initiate an Auto Zero cycle, touch
the CP500 tab (behind the Channel Vertical Setup dialog), then touch AUTO ZERO.
Degauss Probe
If the probe has been magnetized by external magnetic field or by excessive input, the core can be
demagnetized by opening the CP500 dialog and touching DEGAUSS PROBE.
Prior to use, the CP500 probe should be degaussed to eliminate any residual magnetization from the
probe core. Residual magnetism in the core is a major cause of measurement errors when used at high
sensitivities. The demagnetizing process takes about 5 seconds and should always be performed before
taking a measurement.
Without clamping the probe around a conductor, slide the opening lever to close and lock the probe,
and touch DEGAUSS PROBE twice.

CP500 Current Probe
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An Auto Zero is automatically performed as part of the degauss cycle.
NOTE: Never install or remove the probe on bare conductors which are energized. The transformer core
and shield are grounded but not insulated and may contact the conductor when the locking lever is
open.
Degauss the probe in any of these cases:
• After turning on the oscilloscope and probe
• After connecting the probe to the oscilloscope
• Before connecting the probe to the circuit under test
• Whenever an overload conditions occurred
• Whenever the probe is subjected to strong magnetic field
Insertion Impedance
Connecting a current probe to a circuit under test may alter the characteristics of this circuit because of
the impedance represented by the current probe.
In the case of an AC current probe, or open loop AC/DC current probe, two elements are added: the
leakage inductance and magnetizing inductance shunted with a small resistance. Refer to Figure 1.
Figure 1. Insertion Impedance A

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Figure 2. Insertion Impedance B
In a closed loop AC/DC current probe, the magnetizing inductance term drops out because the bucking
coil prevents the core from being magnetized (Figure 2). In addition to the impedance resulting from
probe insertion, any loop wire added to the conductor to gain access to the conductor will increase the
total impedance of the conductor.
Care and Maintenance
Cleaning
The exterior of the probe and cable should be cleaned only using a soft cloth moistened with water or
isopropyl alcohol. The use of abrasive agent, strong detergents or other solvents may damage the
probe.
CAUTION. The probe case is not sealed and should never be immersed in any fluid.
Cleaning Core Surfaces
To clean the transformer core surfaces, open the locking lever and clean the exposed core surfaces with
a cotton swab dampened with isopropyl or ethyl alcohol.
In no case should the core surfaces be lubricated. Any lubrication between the mating surfaces will
degrade the performance of the current probe should be removed with isopropyl or ethyl alcohol.
Calibration Interval
The recommended calibration interval is one year. Adjustment should only be performed by qualified
personnel. (A Performance Verification / Adjustment procedure is included in this manual.)

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Service Strategy
Defective probes must be returned to a Teledyne Lecroy service facility for diagnosis and exchange. A
defective probe under warranty will be replaced with a factory refurbished probe. A probe that is not
under warranty can be exchanged for a factory refurbished probe. A modest fee is charged for this
service. A defective probe must be returned in order to receive credit for the probe core.
Troubleshooting
If the probe is not operating properly the problem may be the way in which it is used. Before assuming
the probe is defective, perform the following troubleshooting procedures:
1. Verify the Teledyne Lecroy oscilloscope is running firmware 4.3.0.0 or higher. The firmware
version of your oscilloscope can be verified by selecting Utilities > Utilities Setup > Status tab.
2. Waveform is inverted —Make sure the arrow on the slider is in the direction of the current
flow.
3. If the displayed signal shows a high offset —The probe locking lever may not be fully closed and
locked or the probe may need to be degaussed.
4. Attenuated signals or poor frequency response may be caused by contaminated core surfaces or
the probe locking lever may not be fully closed and locked.
5. No signal —Make sure the slider is closed and locked and that the ProBus connector is fully
engaged.

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Returning a Defective Probe
Contact your local Teledyne Lecroy sales representative to find out where to return the product. All
returned products should be identified by model number and serial number. Provide your name and
contact number and if possible describe the defect or failure. In case of products returned to the
factory, a Return Authorization Number (RAN) must be used. Contact your nearest Teledyne Lecroy
office, or the New York Customer Care Center, to receive a RAN.
Return shipment should be prepaid. Teledyne Lecroy cannot accept COD or Collect Return shipments.
We recommend air-freighting.
1. Contact your local Teledyne Lecroy sales or service representative to obtain a Return
Authorization Number.
2. Remove all accessories from the probe. Do not include the manual.
3. Pack the probe in its case, surrounded by the original packing material (or equivalent) and box.
4. Label the case with a tag containing:
•The RAN
•Name and address of the owner
•Probe model and serial number
•Description of failure
5. Package the probe case in a cardboard shipping box with adequate padding to avoid damage in
transit.
6. Mark the outside of the box with the shipping address given to you by the Teledyne Lecroy
representative; be sure to add the following:
•ATTN: <RAN assigned by the Teledyne Lecroy representative>
•FRAGILE
7. Insure the item for the replacement cost of the probe.
8. If returning a probe to a different country, also:
Mark shipments returned for service as a “Return of US manufactured goods for
warranty repair/recalibration.”
If there is a cost involved in the service, put the service cost in the value column and the
replacement value in the body of the invoice marked “For insurance purposes only.”
Be very specific as to the reason for shipment. Duties may have to be paid on the value
of the service.

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Performance Verification
This procedure can be used to verify the warranted characteristics of the CP500 Current Probe.
The recommended calibration interval for the model CP500 Current Probe is one year. The complete
performance verification procedure should be performed as the first step of annual calibration.
Performance verification can be completed without removing the probe covers or exposing the user to
hazardous voltages. Test results can be recorded on a photocopy of the Test Record provided at the end
of the manual.
Adjustment should only be attempted if a parameter measured in the Performance Verification
Procedure is outside the specification limits. Adjustment should only be performed by qualified
personnel.
The warranted characteristics of the CP500 Current Probe are valid at any temperature within the
Environmental Characteristics listed in the Specifications. However, some of the other test equipment
used to verify the performance may have environmental limitations required to meet the accuracy
needed for the procedure. Make sure that the ambient conditions meet the requirements of all the test
instruments used in his procedure.
NOTE: The correct operation of the CP500 controls requires software version 4.3.0.0 or higher. The
software version in the test oscilloscope can be verified by selecting Utilities > Utilities Setup > Status
tab. Contact your local Teledyne Lecroy representative if the software in your oscilloscope requires
updating.
Test Equipment Required
The following table lists the test equipment and accessories (or their equivalents) which are required for
performance verification of the CP500 Current Probe.
Because the input and output connector types may vary on different brands and models of test
instruments, additional adapters or cables may be required.
Table 1. List of Performance Verification test equipment.
Description
Minimum Requirements
Test Equipment Examples
Wide Band Oscilloscope
Any oscilloscope with
ProBus interface and
Software version 4.3.0.0 or higher
Teledyne LeCroy LT322
Digital Multimeter
(2 required)
DC: 0.1% Accuracy
5½ digit resolution
Agilent Technologies 34401A or
Fluke 8842A-09

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Description
Minimum Requirements
Test Equipment Examples
Function Generator
50 Hz sine wave output
3 Vrms into 50Ω
Agilent Technologies 33120A or
Stanford Research Model DS340
Calibration Fixture, 500 Turn
Loop
500 Turn loop in series with 0.5Ω ±
0.1% resistor with sense terminals
Teledyne LeCroy CP500-CF02
Calibration Fixture
ProBus Extension Cable
Teledyne LeCroy PROBUS-CF01
Banana Plug Adapter
Female BNC to Dual Banana Plug
Pomona 1269
Patch Cables (4 required)
Male Banana to Male Banana, 12"
Pomona B-12-0 (black)
Pomona B-12-2 (red)
BNC Adapter
BNC Male to Dual Banana Jack
Pomona 1296
Preliminary Procedure
1. Connect the CP500 to the channel 1 input of the oscilloscope and completely close the probe
locking lever.
2. Turn the oscilloscope on and allow at least 30 minutes warmup time for the CP500 and test
equipment before performing the Verification Procedure.
3. Turn on the other test equipment and allow these to warm up for the time recommended by
the manufacturer.
4. While the instruments are reaching operating temperature, make a photocopy of the
Performance Verification Test Record (located in Appendix A), and fill in the necessary data.
Functional Check
The functional check will verify the basic operation of the probe functions. It is recommended that the
Functional Check be performed prior to the Performance Verification Procedure.
1. Select Channel 1 and verify that the probe bandwidth is set to Full (BWL OFF).
2. Verify that the CP500 is sensed and the CP500 tab appears behind the channel setup dialog.
3. On the CP500 tab, degauss the probe by touching DEGAUSS, then OK.
4. Verify that "Performing Degauss on CP500...." is displayed at the bottom of the screen and no
error message remains displayed.
5. Lock the probe by pushing the locking lever fully towards the probe head.
6. Verify that the message disappears.

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7. Degauss the probe by touching DEGAUSS (on the CP500 dialog), then OK.
8. Verify that “Degaussing CP500 probe...” is displayed at the top of the screen and no error
message remains displayed.
Check LF Accuracy
Figure 3. LF Accuracy Test set up.
1. Set the Function generator to 50 Hz sine wave. Output voltage at 3 Vrms with 50Ω output.
2. Remove the CP500 from the oscilloscope and reconnect using the ProBus extension cable.
Connect the BNC male connector of the ProBus extension to DMM #1 using a BNC Female to
Dual Banana adapter (Figure 3).
3. Using Banana Patch cords and the BNC to Dual Banana Plug adapter, connect the ’V Source’ and
’V Return’ terminals of the 500 Turn Calibration Loop to the output of the Function Generator.
4. Connect the Current Sense terminals of the 500 Turn Calibration Loop to the voltage inputs of
DMM #2.
5. Set both DMMs to measure AC Volt.
6. With the CP500 removed from any signal and the locking lever returned to the LOCKED position,
degauss the probe by touching DEGAUSS (located on the CP500 dialog), then OK.

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7. Open the CP500 locking lever and position the probe input around the 500 Turn loop. Close and
LOCK the locking lever.
8. Adjust the Function generator voltage until the voltage measured at the ’Current Sense’
terminals (DMM #2) reads 50 mV ±0.05 mV. (This corresponds to 500 A at the probe head).
9. Record the voltage measured by DMM #1 on the Test Record.
10. Verify that the measured voltage is between 0.495 volt and 0.505 volt.
Adjustment Procedure
This procedure can be used to adjust the warranted characteristics of the CP500 Current Probe. This
procedure should be used if a parameter measured in the Performance Verification Procedure is outside
of the specification limits. Adjustment should only be performed by qualified personnel.
The warranted characteristics of the CP500 Current Probe are valid at any temperature within the
Environmental Characteristics listed in the Specifications. However, some of the other test equipment
used to verify the performance may have environmental limitations required to meet the accuracy
needed for the procedure. Make sure that the ambient conditions meet the requirements of all the test
instruments used in this procedure.
NOTE: The correct operation of the controls of the CP500 requires oscilloscope software version 4.3.0.0
or higher. The software version in the test oscilloscope can be verified by selecting Utilities, Utilities
Setup, then the Status tab. Contact your local Teledyne Lecroy representative if the software in your
oscilloscope requires updating.
Test Equipment Required
The following table lists the test equipment and accessories, or their equivalents, which are required for
adjustment of the CP500 Current Probe.
Because the input and output connector types may vary on different brands and models of test
instruments, additional adapters or cables may be required.

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Table 2. List of Adjustment Procedure equipment.
Description
Minimum Requirements
Test Equipment Examples
Wide Band Oscilloscope
Minimum 200 MHz bandwidth
ProBus interface equipped
Software version 4.3.0.0 or higher
Teledyne LeCroy WaveRunner
6030A
Digital Multimeter (2 required)
DC: 0.1% Accuracy
5½ digit resolution
Agilent Technologies 34401A, or
Fluke 8842A-09
Function Generator
50 Hz sine wave output
3 Vrms into 50 Ω
Agilent Technologies 33120A, or
Stanford Research Model DS340
Calibration Fixture, 100 Turn Loop
100 Turn loop in series with 0.5 Ω
±0.1% resistor with sense terminals
Teledyne LeCroy CP500-CF02
Banana Plug Adapter
Female BNC to Dual Banana Plug
Pomona 1269
Calibration Fixture
ProBus Extension Cable
Teledyne LeCroy PROBUS-CF01
Patch Cables (4 required)
Male Banana to Male Banana, 12"
Pomona B-12-0 (black) or
Pomona B-12-2 (red)
BNC Adapter
BNC Male to Dual Banana Jack
Pomona 1296
Preliminary Procedure
1. Remove the probe compensation box circuit board by removing the two screws from the cable
end of the compensation box and sliding the circuit board out of the box.
2. Connect the CP500 compensation board to the channel 1 input of the oscilloscope through the
ProBUS extension cable, and close and lock the probe jaws.
3. Turn the oscilloscope on and allow at least 30 minutes warmup time for the CP500 and test
equipment before performing the Verification Procedure.