Instruction Manual
LeCroy CP500
REVISION A– November 2001
LeCroy Corporation
700 Chestnut Ridge Road
Chestnut Ridge, NY 10977-6499
Tel: (845) 578-6020, Fax: (845) 578-5985
Internet: www.lecroy.com
Warranty
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, 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 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. 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. LeCroy shall not be liable for any special, incidental, or consequential damages, whether
in contract or otherwise.
Copyright 2001, LeCroy Corporation. All rights reserved. Contents of this publication may not
reproduced in any form without permission of LeCroy Corporation.
LeCroy, SMART Trigger, and ProBus are registered trademarks of LeCroy Corporation.
All other marks are the property of their respective owners.
CP500-OM-E Rev A 1101
DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014:1998
Manufacturer’s Name: LeCroy Corporation
Manufacturer’s Address: 700 Chestnut Ridge Road
Chestnut Ridge, NY 10977
USA
herewith declare that
Product(s) Name: Current probe
Model Number(s): CP500
including all their options are in conformity with the provisions of the following EC directive(s), including the latest
amendments, and with national legislation implementing these directives:
73/23/EEC Low Voltage Directive
89/336/EEC EMC Directive
and that conformity with Council Directive 73/23/EEC is based on:
EN 61010-1:1993: Safety requirements for electrical equipment for measurement
control and laboratory use
Part 1: General requirements
EN 61010-2-031:1994: Part 2-031: Particular requirements for hand-held probe
assemblies for electrical measurement and test
EN 61010-2-032:1995: Part 2-032: Particular requirements for hand-held current clamps
for electrical measurement and test
and that conformity with Council Directive 89/336/EEC is based on:
EN 61326-1: 1997 +A1:1998: EMC requirements for electrical equipment for measurement control and
Emissions: EN 55011:1998+A1:1999 Radiated Emissions
Immunity: EN 61000-4-2:1995+A1:1998 Electrostatic Discharge
By: R. Kalyandrug LeCroy Europe GmbH
Product Compliance Manager Waldhofer Str. 104
Place: LeCroy Corporation Germany
700 Chestnut Ridge Road
Chestnut Ridge, NY 10977 Tel: (49) 6221 82700
USA Fax:(49) 6221 834655
Date: October 22, 2001
CP500-OM-E Rev A ISSUED: November 2001 iii
laboratory use
EN 61000-4-3:1996+A1:1998 RF Radiated EM Field
EN 61000-4-4:1995 Electrical Fast Transient/Burst
European Contact:
Your local LeCroy Sales Office or
D-69123 Heidelberg
BLANK PAGE
iv ISSUED: November 2001 CP500-OM-E Rev A
Table of Contents
Safety Information ...........................................................................................1-1
OPERATOR SAFETY ................................................................................................... 1-1
OPERATING ENVIRONMENT ..................................................................................... 1-1
SAFETY SYMBOLS ..................................................................................................... 1-1
USAGE ......................................................................................................................... 1-2
Overview ..........................................................................................................2-1
DESCRIPTION ............................................................................................................. 2-1
KEY FEATURES .......................................................................................................... 2-1
CONVENTIONS USED IN THIS MANUAL ................................................................... 2-1
ACCESSORIES ............................................................................................................ 2-2
Operation .........................................................................................................3-1
PRECAUTIONS ............................................................................................................ 3-1
CONNECTING THE PROBE TO THE TEST INSTRUMENT ....................................... 3-1
CONNECTING THE PROBE TO THE TEST CIRCUIT ................................................ 3-1
OPERATION WITH A LECROY OSCILLOSCOPE ...................................................... 3-2
AC COUPLING ............................................................................................................. 3-3
AUTO ZERO ................................................................................................................. 3-3
DEGAUSSING PROBE ................................................................................................ 3-4
INSERTION IMPEDANCE ............................................................................................ 3-4
Care and Maintenance ....................................................................................4-1
CLEANING ................................................................................................................... 4-1
CLEANING CORE SURFACES ................................................................................... 4-1
CALIBRATION INTERVAL ........................................................................................... 4-1
SERVICE STRATEGY .................................................................................................. 4-1
TROUBLESHOOTING .................................................................................................. 4-2
RETURNING A PROBE ............................................................................................... 4-2
RETURNING A PROBE TO A DIFFERENT COUNTRY .............................................. 4-3
Performance Verification ................................................................................5-1
TEST EQUIPMENT REQUIRED .................................................................................. 5-1
PRELIMINARY PROCEDURE ..................................................................................... 5-2
FUNCTIONAL CHECK ................................................................................................. 5-2
PERFORMANCE VERIFICATION PROCEDURE ........................................................ 5-3
CHECK DC ACCURACY .............................................................................................. 5-3
CP500-OM-E Rev A ISSUED: November 2001 v
Specifications ..................................................................................................6-1
NOMINAL CHARACTERISTICS .................................................................................. 6-1
WARRANTED CHARACTERISTICS ............................................................................ 6-1
TYPICAL CHARACTERISTICS .................................................................................... 6-1
ENVIRONMENTAL CHARACTERISTICS .................................................................... 6-2
PHYSICAL CHARACTERISTICS ................................................................................. 6-2
COMPLIANCES AND CERTIFICATIONS .................................................................... 6-3
Appendix A ......................................................................................................1-1
PERFORMANCE VERIFICATION TEST RECORD ..................................................... 1-1
EQUIPMENT USED: .................................................................................................... 1-1
CP500 TEST RECORD ................................................................................................ 1-2
vi ISSUED: November 2001 CP500-OM-E Rev A
1Safety Information
OPERATOR SAFETY
To avoid personal injury and to prevent damage to the probe or
any products connected to it, review the following safety
precautions.
OPERATING ENVIRONMENT
Before using this probe, ensure that its operating environment will
be maintained within these parameters:
SAFETY SYMBOLS
Whenever the following safety symbols appear in the instruction
manual or on the probe, they alert the user to an aspect of safety.
Safety Information
Operation In-door Use
Temperature 0 to 40 °C (32 to 104 °F)
Humidity ≤80% RH (non-condensing)
Symbol Meaning
Refer to accompanying documents (for safety related
information)
CAUTION
WARNING
Calls attention to a procedure, practice or condition
that could possibly cause damage to equipment
Calls attention to a procedure, practice or condition
that could possibly cause bodily injury or death
Risk of electrical shock
Earth ground
Probe is protected by reinforced or double insulation
CP500-OM-E Rev A ISSUED: November 2001 1-1
CP500 Current Probe
USAGE
CAUTION
WARNING
The probe is intended to be used only with instruments that are
connected to earth ground through the input connector. The
probe is not intended to be used in wet or explosive
atmospheres.
The use of the probe and/or the instrument it is connected to in a
manner other than that specified may impair the safety
mechanisms.
In order to assure safe operation and to obtain maximum
performance from the unit, observe the following:
1. 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.
2. In order 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:
• Overvoltage Category III
Basic insulation requirement for working voltage of 300 V.
• Pollution degree 2
3. 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.
4. Be careful not to damage the insulation surface when making
measurements.
5. Do not use the probe if any part is damaged. All maintenance
should be referred to qualified service personnel.
To guarantee accurate performance characteristics, mechanical
shock should be avoided, as well as damage to the cable through
CAUTION
1-2 ISSUED: November 2001 CP500-OM-E Rev A
excessive bending. The probe case is not sealed and should
never be immersed in any fluid. Do not exceed the maximum
specified current/voltage levels. (See Specifications).
###
2Overview
DESCRIPTION
KEY FEATURES
Overview
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 9.1.0 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 front panel.
The oscilloscope provides power to the probe, so no external
power supply is needed.
• Highly accurate current measurements
• Easy current measurements
• Large opening for high current measurements
• Compact
• Over-current protected
CONVENTIONS USED IN THIS MANUAL
The following conventions may appear in this manual:
Note
A Note contains information relating to the use of the
product.
CAUTION
A Caution contains information that should be followed to
avoid possible damage to the instrument or the device
under test.
WARNING
A Warning alerts you to a potential hazard. Failure to
adhere to the statement in a WARNING message could
result in personal injury.
CP500-OM-E Rev A ISSUED: November 2001 2-1
CP500 Current Probe
ACCESSORIES
The following symbols may appear on the product:
CAUTION: Refer to
accompanying documents
This refers you to additional information contained in this manual.
The corresponding information in the manual is similarly denoted.
This is the symbol for earth ground.
Certificate of Calibration
Instruction Manual. CP500-OM-E
###
2-2 ISSUED: November 2001 CP500-OM-E Rev A
3Operation
PRECAUTIONS
Operation
Note
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.
Note
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 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 towards the cable 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.
CP500-OM-E Rev A ISSUED: November 2001 3-1
CP500 Current Probe
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.
OPERATION WITH A LECROY OSCILLOSCOPE
Note
Proper operation of the CP500 requires software version
9.1.0 or higher. Attaching the probe to an oscilloscope
with older software may give unreliable operation, including lock up of the oscilloscope. Should this occur, remove
the probe and turn the oscilloscope power OFF and ON.
The verify the software version by pressing SCOPE STATUS and selecting the SYSTEM menu choice. Software
upgrades for most LeCroy oscilloscopes can be obtained
free of charge. Contact your LeCroy sales representative
for more information.
Control through the oscilloscope user interface can be found in
the Coupling menu of 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 minimum and maximum
sensitivities depend on the oscilloscope being used.
Figure 3-1 shows the oscilloscope user interface menu for a
CP500 probe.
The menu allows for the selection of the probe’s coupling (DC,
Grounded or AC ) in the COUPLING menu, DEGAUSS PROBE
and AUTO ZERO functions.
3-2 ISSUED: November 2001 CP500-OM-E Rev A
Probe
Sensitivity
Highlighted number indicates selected channel,
oscilloscope input sensitivity and coupling
Operation
Probe
Attenuation
Fig. 3-1. Oscilloscope display with menu
AC COUPLING
DC, Ground or AC coupling can be selected through the Coupling
menu. 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
CP500-OM-E Rev A ISSUED: November 2001 3-3
CP500 Current Probe
DEGAUSSING PROBE
drift may occur. To initiate an Auto Zero cycle press the button
next to AUTO ZERO menu in the oscilloscope’s user interface.
Auto Zero must be performed without any current passing
thought the test conductor and with a correctly closed probe
head.
If the probe has been magnetized by external magnetic field or by
prolonged exposure to non-symmetrical pulsed currents resulting
in a DC offset, the core can be demagnetized by pressing the
button next to DEGAUSS PROBE menu in the user interface.
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 press the button
next to DEGAUSS PROBE menu twice
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 fields
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.
3-4 ISSUED: November 2001 CP500-OM-E Rev A
Operation
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 3-2 A
AC Probe Precision AC/DC Probe
Leakage
Magnetizing
InductanceInductance
A
Leakage
Inductance
Magnetizing
Inductance
B
Figure 3-2. Insertion Impedance
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 3-2 B.
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.
###
CP500-OM-E Rev A ISSUED: November 2001 3-5
CP500 Current Probe
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3-6 ISSUED: November 2001 CP500-OM-E Rev A
4Care 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.
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.
Care and Maintenance
CAUTION
CALIBRATION INTERVAL
The recommended calibration interval is one year. Adjustment
should only be performed by qualified personnel. (A Performance
Verification procedure is included in this manual.)
SERVICE STRATEGY
Defective probes must be returned to a 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.
Calibration adjustments require the use of specialized signal
sources which are not commercially available. Probes which do
not pass the performance verification must be returned to the
factory for service.
CP500-OM-E Rev A ISSUED: November 2001 4-1
CP500 Current Probe
TROUBLESHOOTING
RETURNING A PROBE
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 using on a LT or LC series LeCroy oscilloscope with
firmware 9.1.0 or higher. (Firmware version of your oscilloscope can be verified by pushing SCOPE STATUS and then
selecting System menu option.)
2. Waveform is inverted — Make sure the arrow on the core
clamp 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 locking lever is closed and locked
and verify that the ProBus connector is fully engaged
The procedure for returning a probe for calibration or service is as
follows:
Contact your local 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) should be used. The RAN can be established by
contacting your nearest LeCroy sales office, representative, or
the North America Customer Care Center.
Return shipment should be prepaid. LeCroy cannot accept COD
or Collect Return shipments. We recommend air-freighting. It is
important that the RAN be clearly shown on the outside of the
shipping package for prompt redirection to the appropriate
department.
1. Contact your local LeCroy sales or service representative to
obtain a Return Authorization Number.
2. Remove all accessories from the probe. Do not include the
manual.
4-2 ISSUED: November 2001 CP500-OM-E Rev A
Care and Maintenance
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 LeCroy representative; be sure to add the following:
• ATTN: <RAN assigned by the LeCroy representative>
• FRAGILE
7. Insure the item for the replacement cost of the probe.
8. Ship the package to the appropriate address.
RETURNING A PROBE TO A DIFFERENT COUNTRY
In order to avoid customs duty for purchase price of a new probe,
when your probe is returned for service, please use the following
procedure.
In addition to the items mentioned above in ‘Returning a Probe’,
you’ll need to mark shipments returned for service as a ‘Return of
US goods for warranty repair/recalibration’. If there is a cost
involved in the service, put the cost of the service in the value
column and the original value of the product at time of purchase
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.
####
CP500-OM-E Rev A ISSUED: November 2001 4-3
CP500 Current Probe
BLANK PAGE
4-4 ISSUED: November 2001 CP500-OM-E Rev A
5Performance 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. Test results can be recorded on a photocopy of the
Test Record provided at the end of the manual.
Performance verification can be completed without removing the
probe covers or exposing the user to hazardous voltages.
Calibration adjustments require the use of specialized signal
sources which are not commercially available. Probes which do
not pass the performance verification must be returned to the
factory for service.
Adjustment should only be performed by qualified personnel.
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.
Performance Verification
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 5-1. List of Required Equipment
Description Minimum Requirements Test Equipment Examples
Oscilloscope Any oscilloscope equipped with
ProBus interface with software version 9.1.0 or higher
Digital Multimeter
(2 required)
Function Generator 50 Hz sine wave output. 3 Vrms into
Calibration Fixture, 500 turn
Loop
DC: 0.1% Accuracy
5½ digit resolution
50Ω
500 turn loop in series with 0.5Ω ±
0.1% resistor with sense termi-
LeCroy LT322
Agilent Technologies 34401A or
Fluke 8842A-09
Agilent Technologies 33120A or
Stanford Research Model DS340
LeCroy CP150-CF02
nals.
CP500-OM-E Rev A ISSUED: November 2001 5-1
CP500 Current Probe
Description Minimum Requirements Test Equipment Examples
Calibration Fixture ProBus Extension Cable 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), 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 enter the Coupling menu and verify
that the probe BWL is set to OFF.
2. Verify that Probe sensed (CP500) is displayed on the right
hand menu.
3. Degauss the probe by pressing the DEGAUSS button,
(located in the coupling menu), twice.
4. Verify that "Performing Degauss and Auto Zero on CP500
probe...." is displayed at the top of the screen and no error
message remains displayed.
5. Lock the probe by pushing the locking slider fully towards the
probe head.
5-2 ISSUED: November 2001 CP500-OM-E Rev A
6. Verify that the message disappears.
7. Degauss the probe by pressing the DEGAUSS button,
(located in the Coupling menu), twice.
8. Verify that “Degaussing CP500 probe...” is displayed at the
top of the screen and no error message remains displayed.
PERFORMANCE VERIFICATION PROCEDURE
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.
The correct operation of the CP500 controls requires
software version 9.1.0 or higher. The software version in
the test oscilloscope can be verified by pushing SCOPE
STATUS, then selecting the System menu option. Contact your local LeCroy representative if the software in
your oscilloscope requires updating.
Performance Verification
Note
CHECK DC ACCURACY
1. Set the Function generator to 50 Hz sine wave. Output voltage at 3 Vrms with 50 Ω 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. Refer to figure 5-1.
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. Remove the CP500 from the oscilloscope and reconnect
using the ProBus extension cable. Connect the BNC male
CP500-OM-E Rev A ISSUED: November 2001 5-3
CP500 Current Probe
DMM #1
Function Generator
connector of the ProBus extension to DMM #1 using a BNC
Female to Dual Banana adapter.
7. 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.
Oscilloscope
DMM #2
500 Turn
Current Loop
Current Probe
ProBus Extender
Figure 5-1. DC Accuracy Test Set Up
8. 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.
9. Connect the Current Sense terminals of the 500 turn Calibration Loop to the voltage inputs of DMM #2.
10. Set both DMMs to measure AC Volt.
11. With the CP500 removed from any signal and the locking
lever returned to the LOCKED position, degauss the probe
by pressing the DEGAUSS button (located on the coupling
menu) twice.
12. Open the CP500 locking lever and position the probe input
5-4 ISSUED: November 2001 CP500-OM-E Rev A
Performance Verification
around the 500 turn loop. Close and LOCK the locking lever.
13. Adjust the Function generator voltage until the voltage measured at the ’Current Sense’ terminals (DMM #2) reads 500
mV ± 0.05 mV. (This corresponds to 5 A at the probe head).
14. Record the voltage measured by DMM #2 on the Test
Record.
15. Verify that the measured voltage is between 0.495 Volt and
0.505 Volt.
###
CP500-OM-E Rev A ISSUED: November 2001 5-5
CP500 Current Probe
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5-6 ISSUED: November 2001 CP500-OM-E Rev A
6Specifications
NOMINAL CHARACTERISTICS
Nominal characteristics describe parameters and attributes which
are guaranteed by design, but do not have associated tolerances.
Maximum Continuous Input 500 Amp rms
Current Refer to figure 6-1, Input current
Maximum Peak Input Current 700 Amp peak
Intended Output Load 1 MΩ
Maximum Permitted 600 V Cat II, 300 V Cat III
Circuit Voltage (Insulated conductor).
WARRANTED CHARACTERISTICS
Warranted characteristics describe parameters which have
guaranteed performance. Unless otherwise noted, tests are
provided in the Performance Verification Procedure for all
warranted specifications.
Specifications
vs. frequency.
Guaranteed at 23° C ± 3° C (73° F ± 5° F) after power has been
applied for 30 minutes.
Low Frequency Accuracy
0 to 500 Amp ± 1% of reading ± 500 mA
500 to 700 Amp peak ± 2% of reading
TYPICAL CHARACTERISTICS
Typical characteristics describe parameters which do not have
guaranteed performance, however are representative of the
average performance from a sample of several probes. Tests for
typical characteristics are not provided in the Performance
Verification procedure.
Sensitivity* 200 mA/div* to 200 A/div
Scale factor Temperature ± 2% or less. (from 0° to +40° C,
Coefficient 32° F to 104° F).
Noise Equivalent to 25 mA rms or less
(Bandwidth of measuring instrument: 20 MHz).
CP500-OM-E Rev A ISSUED: November 2001 6-1
CP500 Current Probe
Insertion Impedance Refer to figure 6-2.
Bandwidth (-3 dB) DC to 2 MHz
Rise Time ≤ 175 nsec.
* Lower sensitivity may change with different oscilloscope models.
ENVIRONMENTAL CHARACTERISTICS
Temperature:
Operating 0 to 40 °C (32 °F to 104 °F) at
Storage -10 °C to 50 °C (14° F to 122 °F)
Usage Indoor
Altitude 2000 m (6562 feet).
Effect of External Magnetic Equivalent to a maximum of
Field 800 mA (In a DC or 60 Hz, 400
PHYSICAL CHARACTERISTICS
≤80% relative humidity.
≤80% relative humidity.
A/m magnetic field).
Dimensions Probe:
Length 176 mm (6.9 inch)
Width 27 mm (1.1 inch)
Height 69 mm (2.7 inch)
Dimensions Compensation Box:
Length 65 mm (2.6 inch)
Width 39 mm (1.5 inch)
Height 24 mm (0.9 inch)
Weight 650 g (22.9 oz.)
Maximum conductor 20 mm (0.79 in)
diameter
Cable length 6 m (19.6 feet)
6-2 ISSUED: November 2001 CP500-OM-E Rev A
COMPLIANCES AND CERTIFICATIONS
CE Declaration of Conformity
The probe meets requirements of the EMC Directive 89/336/EEC for Electromagnetic
Compatibility and Low Voltage Directive 73/23/EEC for Product Safety.
EMC Directive: EN 61326-1:1997+A1:1998
EMC requirements for electrical equipment for
measurement, control and laboratory use.
Electromagnetic Emission: EN 55011:1998, Class B radiated emissions
Electromagnetic Immunity:EN 61000-3-2:1995+A1:1998+A2:1998*
Electrostatic discharge
(4 kV/8 kV contact/air)
EN 61000-3-3:1995*RF Radiated Electromagnetic Field
*Meets Performance Criteria "B" limits at certain test levels, during the disturbance, product undergoes a temporary degradation or loss of function of performance which is self
recoverable.
Low Voltage directive: EN 61010-1:1993+A2:1995
Safety requirements for electrical equipment for
measurement, control and laboratory use.
Part 1: General requirements
Part 2-031: Particular requirements for hand-held
probe assemblies for electrical measurement and test
Part 2-032: Particular requirements for hand-held current clamps for electrical measurement and test
Specifications
(3 V/m)
The probe has been qualified to the following
EN 61010-2-031: 1994
EN 61010-2-032:1995
Over-voltage Category II, III (anticipated transient overvoltage 4000 V) Pollution Degree 2.
CP500-OM-E Rev A ISSUED: November 2001 6-3
CP500 Current Probe
500
400
Current
(A rms)
Insertion
Impedance
(ΩΩ)
300
200
100
0
10
10 k 100 k 1 M1 k100
Frequency (Hz)
Figure 6-1. Maximum Input Current vs. Frequency
0.100
0.010
0.001
10 k 100 k 1 M
Frequency (Hz)
Figure 6-2. Insertion Impedance vs. frequency
6-4 ISSUED: November 2001 CP500-OM-E Rev A
Appendix A
1Appendix A
PERFORMANCE VERIFICATION TEST RECORD
This record can be used to record the results of measurements made during the performance verification of the CP500 Current Probe.
Photocopy this page and record the results on the copy. File the completed record as required by
applicable internal quality procedures.
The section in the test record corresponds to the parameters tested in the performance verification
procedure. The numbers preceding the individual data records correspond to the steps in the procedure that require the recording of data. Results to be recorded in the column labeled "Test
Result" are the actual specification limit check. The test limits are included in all of these steps.
Other measurements and the results of intermediate calculations that support the limit check are
to be recorded in the column labeled "Intermediate Results".
Permission is granted to reproduce these pages for the purpose of recording test results.
Model: CP500
Serial Number:
Asset or Tracking Number:
Date:
Technician:
EQUIPMENT USED:
MODEL SERIAL
NUMBER
Digital Multimeter
Digital Multimeter
Function Generator
1
The function generator used in this Performance Verification Procedure is used for making relative measurements. The
output of the generator is measured with a DMM or oscilloscope in this procedure. Thus, the generator is not required to
be calibrated.
CP500-OM-E Rev A ISSUED: November 2001 A-1
1
CALIBRATION
DUE DATE
N/A
CP500 Current Probe
CP500 TEST RECORD
Step Description Test Result
Gain Accuracy
14 Probe Output (Spec Limit: 0.495 - 0.505V) ________________ V
###
A-2 ISSUED: November 2001 CP500-OM-E Rev A
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