Teledyne Lecroy CP150 User manual

Operator’s Manual
CP150 and CP500
Current Probes
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CP150 and CP500 Current Probes
Operator’s Manual
July, 2017
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CP150 and CP500 Current Probes Operator’s Manual
© 2017 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 duplicate and distribute Teledyne LeCroy documentation for internal
educational purposes.
Teledyne LeCroy is a registered trademark 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.
928617-00 Rev A
July, 2017
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Operator’s Manual
i
Contents
Safety Instructions ..................................................................................................................... 1
Symbols..............................................................................................................................................1
Precautions ........................................................................................................................................1
Introduction................................................................................................................................ 3
Specifications............................................................................................................................. 3
Warranted Characteristics ................................................................................................................3
Nominal Characteristics....................................................................................................................4
Typical Characteristics......................................................................................................................4
Environmental Characteristics .........................................................................................................4
Physical Characteristics ...................................................................................................................5
Safety Ratings....................................................................................................................................5
CP150 Derating Curve - Maximum Input Current vs. Frequency *.................................................6
CP150 Insertion Impedance vs. Frequency * ..................................................................................6
CP500 Derating Curve - Maximum Input Current vs. Frequency ...................................................7
CP500 Insertion Impedance vs. Frequency .....................................................................................7
Operation.................................................................................................................................... 8
Precautions ........................................................................................................................................8
Connecting to the Test Instrument ..................................................................................................9
Connecting to the Test Circuit ..........................................................................................................9
Operating with an Oscilloscope......................................................................................................10
Performance Verification .......................................................................................................... 12
Test Equipment Required................................................................................................................13
Preliminary Procedure.....................................................................................................................13
Functional Check .............................................................................................................................14
Check LF Accuracy ..........................................................................................................................14
CPxxx Test Record...........................................................................................................................16
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CP150 and CP500 Current Probes
ii
Care and Maintenance .............................................................................................................. 17
Cleaning............................................................................................................................................17
Calibration Interval ..........................................................................................................................17
Service Strategy...............................................................................................................................17
Troubleshooting...............................................................................................................................17
Returning a Product for Service ................................................................................................ 18
Technical Support..................................................................................................................... 19
Live Support .....................................................................................................................................19
Resources.........................................................................................................................................19
Service Centers ................................................................................................................................19
Warranty................................................................................................................................... 20
Certifications ............................................................................................................................ 21
EMC Compliance..............................................................................................................................21
Safety Compliance...........................................................................................................................22
Environmental Compliance .............................................................................................................23
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Operator’s Manual
1
Safety Instructions
Follow these instructions to keep the probe operating in a correct and safe condition.
Observe generally accepted safety procedures in addition to the precautions specified
here. The overall safety of any system incorporating this accessory is the responsibility
of the assembler of the system.
Symbols
These symbols appear on the probe body or in documentation to alert you to important
safety considerations.
CAUTION, possibility of electric shock.
CAUTION of damage to probe or instrument, or WARNING of hazard to health.
Attend to the accompanying information to protect against personal injury or
damage. Do not proceed until conditions are fully understood and met.
Do not apply around or remove from UNINSULATED HAZARDOUS LIVE
conductors which may render electric shock, electric burn, or arc flash.
Equipment protected by double insulation or reinforced insulation.
CAUTION, hot surface.
Precautions
Comply with the following safety precautions to avoid personal injury or
damage to your equipment:
Use only as specified. The probe is intended to be used only with compatible Teledyne
LeCroy instruments. Using the probe and/or the equipment it is connected to in a
manner other than specified may impair the protection mechanisms.
Do not use the probe for measurements on Mains circuits. The probe should only be
applied around or removed from insulated limited energy circuit conductors that are
not directly connected to the mains.
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CP150 and CP500 Current Probes
2
Do not overload; observe all ratings. To avoid electric shock or fire, do not connect the
current probe to any wire that carries voltages or currents that exceed the ratings of
the probe.
Connect and disconnect properly. Connect the probe to the measurement instrument
before connecting to the circuit/conductor being measured. Avoid damaging the cable
through excessive bending.
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.
Be careful not to damage the insulation surface when making measurements. Before
clamping to the conductor being measured, check that the insulation on the conductor
is undamaged, and take care not to damage the insulation when clamping the
conductor. Any damage to the insulation could cause an electric shock.
Use only indoors and within the operational environment listed. Do not use in wet or
explosive atmospheres.
Do not remove the probe's casing. Touching exposed connections may result in electric
shock.
Keep product surfaces clean and dry.
Comply with the maximum input current vs. frequency derating when measuring
current that includes a high frequency component. Using the probe at high frequencies
or strong magnetic fields may cause the device to become abnormally hot, resulting in
fire, equipment damage or burns.
Do not operate with suspected failures. Before each use, inspect the probe and
accessories for any damage such as tears or other defects in the probe body, cable
jacket, accessories, etc. If any part is damaged, cease operation immediately and
sequester the probe from inadvertent use.
NOTE: Depending on the amplitude and frequency of the current being measured, the
sensor head may emit a resonant sound. This sound may also occur during
demagnetizing operation, but it does not represent a malfunction (device failure).
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Operator’s Manual
3
Introduction
The CP150 and CP500 current probes are designed for easy, highly accurate current
measurements. The compact probes offer wide bandwidth with over-current protection.
The probes utilize a combination of Hall-effect and transformer technology which
enables measurements to be made on DC, AC and impulse currents.
The CP150 has a 10 MHz bandwidth and is designed to measure continuous currents
up to 150 Amps. The CP150-6M has a 5 MHz bandwidth and is designed to measure
continuous currents up to 150 Amps.
NOTE: All CP150 probes, regardless of cable length, will indicate default probe
bandwidth of 10 MHz in the Attributes section of the Probe dialog.
The CP500 has a 2 MHz bandwidth and is designed to measure continuous currents up
to 500 Amp.
The probes can be used with any Teledyne LeCroy instrument with a ProBus interface,
or by using a ProBus interface adapter. With the ProBus interface, the probe becomes
an integral part of the measuring instrument. The bandwidth limit, Auto Zero and
Degauss functions are all controlled from the instrument’s touch screen user interface.
The interface provides power to the probe, so no external power supply is needed.
Specifications
Specifications are subject to change without notice.
Warranted Characteristics
CP150
CP150-6M
CP500
Amplitude Accuracy
±1.0 % of reading at 0-150 Amp
±2.0% of reading at 150-300 Apeak
±1.0 % of reading at 0-500 Amp
±2.0% of reading at 500-700 Apeak
Bandwidth (probe only)
DC to 10 MHz
DC to 5 MHz
DC to 2 MHz
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CP150 and CP500 Current Probes
4
Nominal Characteristics
CP150
CP150-6M
CP500
Max Continuous Input
Current
150 Arms
500 Arms
Max Peak Current
300 Apeak non-continuous
700 Apeak non-continuous
Intended Output Load
1 MΩ
1 MΩ
Measured Conductors
Insulated Conductors only
Insulated Conductors only
Sensitivity *
100 mA/div to 100 A/div
100 mA/div to 200 A/div
* Values are based on oscilloscopes with 1 mV/div sensitivity. Numbers will be higher on instruments with
lower sensitivity.
Typical Characteristics
CP150
CP150-6M
CP500
Output voltage
0.01 V/A
0.01 V/A
Sensitivity Temperature
Coefficient
±2% or less (0⁰C to +40⁰C)
±2% or less (0⁰C to +40⁰C)
Noise (at 20 MHz BW)
6.0 mArms or less
8.0 mArms or less
Rise Time
≤ 35 ns
≤ 70 ns
≤ 175 ns
Environmental Characteristics
CP150
CP150-6M
CP500
Operating Temperature
0 ⁰C to 40 ⁰C
0 ⁰C to 40 ⁰C
Operating RH
≤ 80% (non-condensing)
≤ 80% (non-condensing)
Storage Temperature
-10 ⁰C to 50 ⁰C
-10 ⁰C to 50 ⁰C
Storage RH
≤ 80% (non-condensing)
≤ 80% (non-condensing)
Max Altitude
2000 m
2000 m
Effect of External
Magnetic Field
Maximum of 150 mA in a DC/60 Hz,
400 A/m magnetic field
Maximum of 800 mA in a DC/60 Hz,
400 A/m magnetic field
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Operator’s Manual
5
Physical Characteristics
CP150
CP150-6M
CP500
Probe Head Length
175 mm (6.9 inch)
175 mm (6.9 inch)
Probe Head Width
27 mm (1.1 inch)
27 mm (1.1 inch)
Probe Head Height
69 mm (2.6 inch)
69 mm (2.7 inch)
Maximum diameter of
conductors measured
20 mm (0.79 inch)
20 mm (0.79 inch)
Cable Length
2 m (6.5 feet)
6 m (19.6 feet)
6 m (19.6 feet)
Safety Ratings
Probe Designation1Type D
Measurement Category 2No rated measurement category
Safe Voltage Rating 3Use only on fully insulated conductors
Pollution Degree 42
Definitions (per IEC/EN 61010-2-032:2012)
1. Type D current probe is intended to be applied around or removed from insulated conductors.
2. No rated measurement category; not intended for measurements on circuits directly connected to the
Mains supply. Not rated for measurements within Measurement Categories II, III, or IV.
3. Not rated for measurements on uninsulated conductors.
4. Pollution Degree 2 refers to operating environment where normally only dry, non-conductive pollution
occurs. Temporary conductivity caused by condensation must be expected.
NOTE: Because of the marking requirements per safety standard EN 61010-2-032:2012 (Third Edition), the
measurement category rating that was on the CPxxx probes originally certified per EN 61010-2-032:2002
(Second Edition) has been removed from the product label. However, this change does not reduce the
measurement capability or the level of protection offered by the new probe design.
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CP150 and CP500 Current Probes
6
CP150 Derating Curve - Maximum Input Current vs. Frequency *
* Does not apply to CP150-6M
CP150 Insertion Impedance vs. Frequency *
* Does not apply to CP150-6M
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Operator’s Manual
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CP500 Derating Curve - Maximum Input Current vs. Frequency
CP500 Insertion Impedance vs. Frequency
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CP150 and CP500 Current Probes
8
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.
WARNING: Comply with the derating characteristics of the probe when
measuring current that includes a high frequency component, and never
measure any current that exceeds the rated current. Using the probe at high
frequencies or in strong magnetic fields may cause the probe head to
become abnormally hot, resulting in fire, equipment damage or burns.
CAUTION:Do not touch the probe head until it has had sufficient time to
cool after disconnecting the probe from the circuit. Using the probe near the
current and ambient temperature upper limits for extended lengths of time
may cause the probe head surface to become hot to the touch.
CAUTION:Do not use this probe for making measurements on Mains
Circuits. Using the probe on uninsulated hazardous live conductors may
result in electric shock, electric burn, or arc flash.
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Operator’s Manual
9
Connecting to the Test Instrument
The probe has been designed for use with the Teledyne LeCroy instruments equipped
with the ProBus interface. When you attach the probe output connector to the
instrument’s input connector, the instrument will:
•Recognize the probe model
•Set the input termination to 1 MΩ
•Activate the probe control functions in the touch screen user interface.
Connecting to the Test Circuit
The probe 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 back the slider 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. Close the probe jaws around the conductor until the jaws click shut.
4. Close the slider on the sensor head until the "UNLOCK’ indication disappears
and the "LOCK" indication appears.
5. Verify that the opening lever is firmly locked and the clamp is securely closed.
CAUTION: 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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CP150 and CP500 Current Probes
10
Operating with an Oscilloscope
When connected to a Teledyne LeCroy oscilloscope, the displayed scale factor and
measurement values will be adjusted to account for the effective gain of the probe.
A/div, Offset, and Coupling, and Bandwidth (BWL) are controlled from the Channel
setup (Cx) dialog.
Channel setup dialog with Probe dialog behind it.
The probe’s attributes are shown on the Probe dialog, which appears behind the
Channel dialog when a probe is detected. The Probe dialog also contains controls for
Auto Zero and Degauss.
Probe dialog.
Probe A/div and Attenuation
The front panel Volts/div knob controls the oscilloscope’s scale factor and the probe’s
internal attenuation to give full available dynamic range from 100mA/div to 200 A/div
for the CP500 and 100mA/div to 100 A/div for the CP150.
Alternatively, A/div may be controlled from the channel setup dialog (Cx).
Bandwidth Limit
The probe is capable of switching from Full (maximum bandwidth) to 20 MHz
bandwidth by changing the Bandwidth setting on the Cx dialog.
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Operator’s Manual
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AC Coupling
In general, using offset to adjust a DC current on the screen is the preferred method to
measure transient signals in the presence of a larger DC currents. The offset has limits
that will cause a signal that is beyond the linear operating range of the probe to go off
the screen, preventing measurement errors.
There are times, however, when it is convenient to use AC coupling to remove the DC
component of the measured signal from the measurement. Selecting AC uses the
scope AC coupling at the probe output to remove any steady state value from the
displayed voltage.
NOTE: Since this AC coupling is on the probe output, DC current beyond the linear
range of the probe will cause the probe to saturate and make the displayed waveform
inaccurate. It is important not to exceed the maximum linear input values when using
AC coupling.
Auto Zero
The Probe dialog 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. Open the Probe dialog and touch AUTO ZERO.
Degauss
If the probe has been magnetized by external magnetic field or by excessive input, the
core can be demagnetized by degaussing. 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. Open the Probe dialog and touch DEGAUSS.
An Auto Zero is automatically performed as part of the degauss cycle.
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CP150 and CP500 Current Probes
12
Performance Verification
This procedure can be used to verify the warranted characteristics of the probe. The
recommended calibration interval for the models CP150 and CP500 Current Probes 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.
The warranted characteristics of the 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: Operation of the probe as described requires software version 4.3.0.0 or higher.
To confirm the version installed, choose Utilities > Utilities Setup from the oscilloscope
menu bar, then open the Status tab.
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Operator’s Manual
13
Test Equipment Required
The following table lists the test equipment and accessories (or their equivalents)
which are required for performance verification of the CP150/CP0500 Current Probes.
Because the input and output connector types may vary on different brands and
models of test instruments, additional adapters or cables may be required.
Description Minimum Requirements Example Equipment
Wide Band Oscilloscope
200 MHz bandwidth
ProBus interface equipped
Teledyne LeCroy WaveRunner 6 Zi
Digital Multimeter (2)
DC: 0.1% Accuracy
5½ digit resolution
Agilent Technologies 34401A
Fluke 8842A-09
Function Generator
50 Hz sine wave output 3 Vrms
into 50 Ω
Teledyne LeCroy WaveStation 3082
Stanford Research Model DS340
Calibration Fixture
500 turn loop in series with 0.5Ω
±0.1% resistor with sense
terminals
Teledyne LeCroy CP150-CF02
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)
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 probe to the C1 input of the instrument and completely close the
probe slider.
2. Turn on the instrument and allow at least 30 minutes warmup time for the probe
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 and fill in the necessary data.
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CP150 and CP500 Current Probes
14
Functional Check
The functional check will verify the basic operation of the probe functions. It is
recommended to perform the functional check prior to the performance verification
procedure.
1. Open the C1 setup dialog and confirm that the bandwidth is set to Full (BWL
OFF).
2. Verify that the probe is sensed and the probe dialog (CP150 or CP500 tab)
appears behind the C1 setup dialog.
3. Open the probe dialog and degauss the probe by touching DEGAUSS, then OK.
4. Confirm that the message "Performing Degauss on CPxxx...." is displayed in the
message bar and that no error messages are displayed.
Check LF Accuracy
LF Accuracy Test set up.
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Operator’s Manual
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1. Set the Function generator to 50 Hz sine wave, output voltage at 1.7 Vrms for
CP150 or 3 Vrms for CP500 with 50 Ω output.
2. Remove the probe from the instrument 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.
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 probe removed from any signal and the slider returned to the LOCKED
position, degauss the probe by pressing the DEGAUSS button.
7. Open the probe slider and position the probe input around the 500 Turn loop.
Close and LOCK the slider.
8. Adjust the Function generator voltage until the voltage measured at the ’Current
Sense’ terminals (DMM #2) reads 10 mV ±0.01 mV (10 A at the probe head) for
CP150 or 50 mV ±0.05 mV (500 A at the probe head) for CP500.
9. Record the voltage measured by DMM #1 on the Test Record.
10. Verify that the measured voltage is between 99 mV and 101 mV for CP150, or
0.495 V and 0.505 V for CP500.
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