Instruction Manual LeCroy CP500 Current Probe Revision D - February, 2008
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.
DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014:1998 Manufacturer’s Name: Manufacturer’s Address: LeCroy Corporation 700 Chestnut Ridge Road Chestnut Ridge, NY 10977 USA herewith declare that Product(s) Name: Current Probe Model Number(s): CP030, CP031, CP150, 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 D
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Table of Contents Safety Information............................................................................................ 1-1 OPERATOR SAFETY ................................................................................................... 1-1 OPERATING ENVIRONMENT ..................................................................................... 1-1 SAFETY SYMBOLS ..................................................................................................... 1-1 USAGE ....................
NOMINAL CHARACTERISTICS .................................................................................. 6-1 WARRANTED CHARACTERISTICS ............................................................................ 6-1 TYPICAL CHARACTERISTICS .................................................................................... 6-1 ENVIRONMENTAL CHARACTERISTICS .................................................................... 6-2 PHYSICAL CHARACTERISTICS .....................................................
Safety Information Safety Information 1 OPERATOR SAFETY To avoid personal injury and to prevent damage to the probe or any products connected to it, review the following safety precautions.
CP500 Current Probe USAGE 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. CAUTION 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: WARNING 1.
Overview Overview 2 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 9.1.0 or higher. With the ProBus interface, the CP500 becomes an integral part of the oscilloscope.
CP500 Current Probe ACCESSORIES Certificate of Calibration Instruction Manual.
Operation Operation 3 PRECAUTIONS 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.
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 Probe Sensitivity Highlighted number indicates selected channel, oscilloscope input sensitivity and coupling 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.
CP500 Current 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.
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 Leakage Magnetizing Inductance Inductance A Precision AC/DC Probe Magnetizing Leakage Inductance 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.
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Care and Maintenance Care and Maintenance 4 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.
CP500 Current Probe 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 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.
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.
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Performance Verification Performance Verification 5 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.
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.
Performance Verification 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.
CP500 Current Probe 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. DMM #1 Function Generator Oscilloscope DMM #2 500 Turn Current Loop Current Probe ProBus Extender Figure 5-1. LF Accuracy Test Set Up 8.
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 500 A at the probe head). 14. Record the voltage measured by DMM #1 on the Test Record. 15. Verify that the measured voltage is between 0.495 Volt and 0.505 Volt.
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Adjustment Procedure Adjustment Procedure 6 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. 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.
CP500 Current Probe 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 8.6.0 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. PRELIMINARY PROCEDURE 1.
Adjustment Procedure DMM #1 Function Generator Oscilloscope DMM #2 500 Turn Current Loop Current Probe ProBus Extender Figure 5-1. LF Accuracy Adjustment Set Up 5. Set both DMMs to measure AC Volt. 6. With the CP500 removed from any signal and the slider returned to the LOCKED position, degauss the probe by pressing the DEGAUSS button on the oscilloscope, (located on the coupling menu), twice. 7. Open the CP500 jaws and position the probe input around the 500 Turn loop. Close and LOCK the slider. 8.
CP500 Current Probe 12. Re-apply the light blue product label to the probe head using the double-sided tape.
Specifications Specifications 7 NOMINAL CHARACTERISTICS Nominal characteristics describe parameters and attributes that are guaranteed by design, but do not have associated tolerances. Maximum Continuous Input Current 500 Arms Refer to Figure 7-1, “Input current vs. frequency” Maximum Peak Input Current 700 Amp peak Intended Output Load 1 MΩ Maximum Permitted Circuit Voltage 600 V Cat II, 300 V Cat III (Insulated conductor).
CP500 Current Probe Noise Equivalent to 25 mArms or less (Bandwidth of measuring instrument: 20 MHz). Insertion Impedance Refer to Figure 7-2. Bandwidth (-3 dB) DC to 2 MHz Rise Time ≤ 175 ns ENVIRONMENTAL CHARACTERISTICS Temperature: Operating Storage 0 to 40 °C (32 °F to 104 °F) at ≤ 80% relative humidity. -10 °C to 50 °C (14° F to 122 °F) ≤ 80% relative humidity. Usage Indoor Altitude 2000 m (6562 ft).
Specifications 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.
CP500 Current Probe GRAPHS 500 400 Current (A rms) 300 200 100 0 10 100 1k 10 k 100 k 1M Frequency (Hz) Figure 7-1. Maximum Input Current vs. Frequency 0.100 Insertion Impedance (Ω) 0.010 0.001 10 k 100 k 1M Frequency (Hz) Figure 7-2. Insertion Impedance vs.
Appendix A Appendix A 1 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.
CP500 Current Probe CP500 TEST RECORD Step Description Test Result Gain Accuracy 14 Probe Output (Spec Limit: 0.495 - 0.
