Teledyne Lecroy CP030A User manual

Operator’s Manual
CP030/CP030A
CP031/CP031A
Current Probes
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CP03x/CP03xA Current Probes
Operator’s Manual
April 2015
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CP030/CP030A and CP031/CP031A Current Probes Operator’s Manual
© 2015 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.
925589-00
April 2015
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Operator’s Manual
Contents
Safety Instructions ................................................................................................................................1
Symbols..............................................................................................................................................1
Precautions ........................................................................................................................................1
Introduction ............................................................................................................................................3
Specifications ........................................................................................................................................3
Warranted Characteristics ................................................................................................................3
Nominal Characteristics....................................................................................................................4
Typical Characteristics......................................................................................................................4
Environmental Characteristics .........................................................................................................5
Physical Characteristics ...................................................................................................................5
Safety Ratings....................................................................................................................................5
CP030/CP030A Maximum Input Current vs. Frequency ................................................................6
CP030/CP030A Insertion Impedance vs. Frequency......................................................................6
CP031/CP031A Maximum Input Current vs. Frequency ................................................................7
CP031/CP031A Insertion Impedance vs. Frequency......................................................................7
Operation ................................................................................................................................................8
Precautions ........................................................................................................................................8
Connecting to the Test Instrument ..................................................................................................8
Connecting to the Test Circuit ..........................................................................................................8
Operating with an Oscilloscope........................................................................................................9
Performance Verification ....................................................................................................................11
Test Equipment Required................................................................................................................11
Preliminary Procedure .....................................................................................................................12
Functional Check .............................................................................................................................13
Check LF Accuracy ..........................................................................................................................13
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CP03x/CP03xA Current Probes
Performance Verification Test Record...........................................................................................14
CP03x Test Record ..............................................................................................................................15
Care and Maintenance.........................................................................................................................16
Cleaning............................................................................................................................................16
Calibration Interval ..........................................................................................................................16
Service Strategy...............................................................................................................................16
Troubleshooting...............................................................................................................................16
Returning a Product for Service..........................................................................................................17
Contact Teledyne LeCroy ....................................................................................................................18
Warranty ...............................................................................................................................................18
Certifications ........................................................................................................................................19
Declaration of Conformity — EMC ..................................................................................................19
Declaration of Conformity – Low Voltage Directive .....................................................................20
Environmental Compliance .............................................................................................................20
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Operator’s Manual
Safety Instructions
Follow these instructions to keep this oscilloscope accessory operating in a correct
and safe condition. Observe 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 appear on the probe body or in documentation to alert you to important
safety considerations.
HIGH VOLTAGE WARNING. Risk 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.
DOUBLE INSULATION
PROTECTIVE (EARTH) TERMINAL
Precautions
Avoid personal injury or damage to your equipment by complying with the following
safety precautions:
Use only as specified. The probe is intended to be used only with compatible Teledyne
LeCroy instruments. Use of the probe and/or the equipment it is connected to in a
manner other than specified may impair the protection mechanisms.
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. Observe all terminal ratings.
Connect and disconnect properly. Connect the probe to the measurement instrument
before connecting it to the circuit/signal being tested. De-energize the circuit under
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CP03x/CP03xA Current Probes
test before connecting or disconnecting the probe. Avoid damaging cables 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.
Use the probe only with conductors carrying 300 V or less to avoid short circuits and
accidents that could result in injury or death.
Be sure the conductors measured are insulated with material conforming to
Overvoltage Category I (basic insulation requirement for working voltage of 300 V),
Pollution Degree 2 to prevent short circuits and electric shock when conductors carry
less than 300 V but more than the safe voltage level (SELV limit).
Be careful not to damage the insulation surface when making measurements.
Use only 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.
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.
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Operator’s Manual
Introduction
The CP030, CP030A, CP031, and CP031A 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 CP030 and CP030A have a 50 MHz bandwidth and are designed to measure
continuous currents up to 30 Amp.
The CP031 and CP031A have a 100 MHz bandwidth and are designed to measure
continuous currents up to 30 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
For the most current specifications, see the probe product pages at
teledynelecroy.com. Specifications are subject to change without notice.
Warranted Characteristics
CP030
CP030A
CP031
CP031A
Max Continuous Input
Current at 0.1 V/A
30 Arms
30 Arms
Max Peak Current
50 Apeak non-continuous
50 Apeak non-continuous
Amplitude Accuracy
±1.0 % of reading ±10 mA; to 30 Arms
(DC, 45 to 65 Hz)
±2.0% of reading; to 50 Apeak
±1.0 % of reading ±10 mA; to 30 Arms
(DC, 45 to 65 Hz)
±2.0% of reading; to 50 Apeak
Bandwidth (probe only)
DC to 50 MHz
DC to 100 MHz
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CP03x/CP03xA Current Probes
Nominal Characteristics
CP030
CP030A
CP031
CP031A
Intended Output Load
1 MΩ
1 MΩ
Maximum Permitted
Circuit Voltage
300 V CAT I (insulated conductor)
300 V CAT I (insulated conductor)
Sensitivity *
10 mA/div to
15 A/div
1 mA/div to
15 A/div
10 mA/div to
15 A/div
1 mA/div to
15 A/div
Offset Range
(1x Attenuation)
N/A
±5 A
N/A
±5 A
Max Continuous Input
Current at 1 V/A
(100mA/div or less)
N/A
5 A
N/A
5 A
* Values are based on oscilloscopes with 1 mV/div sensitivity. Numbers will be higher on instruments with
lower sensitivity.
Typical Characteristics
CP030
CP030A
CP031
CP031A
Output voltage
0.1 V/A
0.1 V/A & 1 V/A
0.1 V/A
0.1 V/A & 1 V/A
Sensitivity Temperature
Coefficient
±2% or less (0⁰C to +40⁰C)
±2% or less (0⁰C to +40⁰C)
Noise
2.5 mArms or less
320 µArms
at Full BW
150 µArms
at 20 MHz BWL
2.5 mArms or less
320 µArms
at Full BW
150 µArms
at 20 MHz BWL
Rise Time
≤ 7 ns
≤ 3.5 ns
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Operator’s Manual
Environmental Characteristics
CP030
CP030A
CP031
CP031A
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)
Maximum Altitude
2000 m
2000 m
Effect of External
Magnetic Field
Equivalent to a maximum of 20 mA
in a DC/60 Hz, 400 A/m magnetic field
Equivalent to a maximum of 5 mA
in a DC/60 Hz, 400 A/m magnetic field
Physical Characteristics
CP030
CP030A
CP031
CP031A
Probe Head Length
175 mm (6.9 inch)
175 mm (6.9 inch)
Probe Head Width
18 mm (0.7 inch)
18 mm (0.7 inch)
Probe Head Height
40 mm (1.57 inch)
40 mm (1.57 inch)
Maximum diameter of
conductors measured
5 mm (0.2 inch)
5 mm (0.2 inch)
Safety Ratings
Measurement Category I: 300 V max. permitted circuit voltage, insulated conductor required
1500 V anticipated transient overvoltage
Pollution Degree 2
Definitions (per IEC/EN 61010-1)
1. Measurement Category I (CAT I) refers to measurements performed on circuits not directly connected to mains.
2. Pollution Degree 2 refers to operating environment where normally only dry, non-conductive pollution occurs.
Temporary conductivity caused by condensation must be expected.
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CP03x/CP03xA Current Probes
CP030/CP030A Maximum Input Current vs. Frequency
CP030/CP030A Insertion Impedance vs. Frequency
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CP031/CP031A Maximum Input Current vs. Frequency
CP031/CP031A Insertion Impedance vs. Frequency
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CP03x/CP03xA Current Probes
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 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.
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3. Close the slider on the sensor head until the "UNLOCK’ indication disappears
and the "LOCK" indication appears.
4. 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.
Operating with an Oscilloscope
When the probe is 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.
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CP03x/CP03xA Current Probes
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 10mA/div to 15 A/div for
CP030 and CP031, or 1 mA/div to 15 A/div for CP030A and CP031A. CP031A and
CP031A will automatically adjust attenuation based on the A/div setting.
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.
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. The maximum DC input current is 30A when the probe is in 0.1 V/A
sensitivity (>100mA/div), and 5A when the probe is in 1 V/A (≤100mA/div).
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.
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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.
Performance Verification
This procedure can be used to verify the warranted characteristics of the probe. The
recommended calibration interval for the models CP030, CP030A, CP031, and CP031A
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
for CP03x and 7.7.1.Xa or higher for CP03xA. To confirm the version installed on the
instrument, choose Utilities > Utilities Setup from the menu bar, then open the Status
tab. CP03xA probes are not compatible with WaveSurfer 3000 oscilloscopes.
Test Equipment Required
The following table lists the test equipment and accessories (or their equivalents)
which are required for performance verification of the CP03x/CP03xA 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.
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CP03x/CP03xA Current Probes
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 50Ω
Teledyne LeCroy WaveStation 3082
Stanford Research Model DS340
Calibration Fixture
100 turn loop in series with 0.5Ω
±0.1% resistor with sense
terminals
Teledyne LeCroy CP031-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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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 (CP03x or CP03xA 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 CP03x...." 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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CP03x/CP03xA Current Probes
1. Set the Function generator to 50 Hz sine wave, output voltage at 3 Vrms with
50Ω 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 100 Turn Calibration Loop to the
output of the Function Generator.
4. Connect the Current Sense terminals of the 100 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. Set the current probe channel sensitivity to 1 A/div.
8. Open the probe slider and position the probe input around the 100 Turn loop.
Close and LOCK the slider.
9. 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 10 A at
the probe head).
10. Record the voltage measured by DMM #1 on the Test Record.
11. Verify that the measured voltage is between 0.989 volt and 1.011 volt.
Performance Verification Test Record
Permission is granted to photocopy the following page and record the results of the
performance verification procedure on the copy. File the completed record as required
by applicable internal quality procedures.
Results recorded under "Test Result" are the actual specification limit check. The test
limits are included in all of these steps. Record other measurements and intermediate
calculations that support the limit check under "Intermediate Data".
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