AEMC Instruments AEMC JM813 Current Transformer Manual
Contents
1. the black and red terminals to the Ampere AC range of your DMM or current measuring instrument Select the appropriate current range 5 A AC Clamp the probe around the conductor to be tested If the reading is less than 2 A select the lower range until you obtain the best resolution Read the value display on the DMM and multiply it by the probe ratio 1000 1 If reading 0 592 A AC the current flowing through the probe is 0 592 A x 1000 592A AC For best accuracy carefully center the conductor inside the probe jaw avoid if possible the proximity of other conductors which may create noise Tips for Making Precise Measurements e When using a current probe with a meter it is important to select the range that provides the best resolution Failure to do this may result in measurement errors e Make sure that probe jaw mating surfaces are free of dust and contamination Contaminants cause air gaps between the jaws increasing the phase shift between primary and secondary It is very critical for power measurement MAINTENANCE A Warning e For maintenance use only original factory replacement parts e To avoid electrical shock do not attempt to perform any servicing unless you are qualified to do so e To avoid electrical shock and or damage to the instrument do not get water or other foreign agents into the probe Maintenance To ensure optimum performance it is important to keep the probe jaw mating surfaces clean at all ti2. vor dictrihiitar at anea aivina a detailed daccrintinn nf anv damane Shop for AEMC products online at www h opAE M C ca 1 877 766 5412 NEF AEWIU INSTRUMENTS 2 52 64 mm 7 Cable max Fi 1 97 x 5 31 50 x 135 mm or 2 52 x 3 94 64 x 100 mm Bus Bar max ELECTRICAL SPECIFICATIONS Accuracy and Phase Shift Current Range Primary current 150A 600A 3000A 1 to 2400 A AC continuous cycle for Acc racy 1 5 0 75 0 5 the full temperature range Phase shift 1 5 0 75 0 5 3000 A if ambient temperature lt 35 C or 95 F Reference conditions 23 C 3 K 20 to 85 Transformation Ratio RH 48 to 65 Hz external magnetic field lt 40 3000 3 A m no DC component no external current Output Signal arana E sample centered 1 mA AC A AC 3 A at 3000 A gac IMPeSaNGR Sagn Shop for AEMC products online at www h opAE M C ca 1 877 766 5412 Overload 3600 A during 5 mn Accuracy Per IEC 185 26 27 Class 0 5 from 48 to 1000 Hz Ampere Second Product 90 A s Frequency Range 30 Hz to 5 kHz current derating above 1 kHz for continuous use Load Impedance lt 0 60 Working Voltage 600 V AC Common Mode Voltage 600 V AC Influence of Adjacent Conductor 0 005 A A AC Influence of Conductor in Jaw Opening 1 0 1 A of reading MECHANICAL SPECIFICATIONS Operating Temperature 14 to 122 F 10 to 5
3. 0 C Storage Temperature 13 to 176 F 25 to 80 C Influence of Temperature lt 0 1 per 10 K Jaw Opening 3 54 90 mm Maximum Conductor Size Cable 2 52 max 64mm Bus bar 1 97 x 5 31 50 x 135 mm 2 52 x 3 94 64 x 100 mm Envelope Protection IP 20 IEC 529 Drop Test 500 mm IEC 68 2 32 Mechanical Shock 100 g IEC 68 2 27 Vibration 10 55 10 Hz 0 15 mm IEC 68 2 6 Polycarbonate Material Handles 10 fiberglass charged polycarbonate UL 94 VO Jaws ABS UL 94 V2 Dimensions 4 72 x 12 40 x 1 89 120 x 315 x 48 mm Shop for AEMC products online at www S h 0 pA E M C Ca Weight 2 65 Ibs 1200 g Colors Dark gray handles with red jaws Output Two standard safety banana jacks 4mm SAFETY SPECIFICATIONS ce Oo YW Electrical Double insulation or reinforced insulation between primary or secondary and outer case of handle upon IEC 1010 2 32 Common Mode Voltage 600V Category III Pollution 2 ORDERING INFORMATION Current Probe JM813 000 Cat 2110 93 Includes a user manual and a product warranty and registration card Accessories Leads set of 2 5 ft safety 1000V Cat 2111 29 Lead No 211 for Probe 5A Series 5 ft rated 250 V Cat 2950 06 1 877 766 5412 OPERATION Please make sure that you have already read and fully understand the WARNING section on page 1 Making Measurements with the AC Current Probe Model JM813 Connect
4. AC Current Probe Model JM813 User Manual DESCRIPTION The JM813 Catalog 2110 93 is designed for use in industrial environments The squared jaws permit multiple conductor or bus bar positioning The current output makes it the perfect tool for measurement with DMMs recorders power and harmonic meters The Model JM813 is compatible with any AC ammeter multimeter or other current measuring instrument with an input impedance lower than 0 6Q To achieve the stated accuracy use the JM813 with the DMM having an accuracy of 0 75 WARNING These safety warnings are provided to ensure the safety of personnel and proper operation of the instrument e Read the instruction manual completely and follow all the safety information before attempting to use or service this instrument Use caution on any circuit Potentially high voltages and currents may be present and may pose a shock hazard Read the Safety Specifications section prior to using the current probe Never exceed the maximum voltage ratings given Safety is the responsibility of the operator ALWAYS connect the current probe to the display device before clamping the probe onto the sample being tested ALWAYS inspect the instrument probe probe cable and output terminals prior to use Replace any defective parts immediately NEVER use the current probe on electrical conductors rated above 600 V in overvoltage category III CAT III Use extreme caution when clamping aro
5. AEMC products online at www h opAE M C ca 1 877 766 5412 99 MAN 100115 v5 06 07
6. mes Failure to do so may result in error in readings The following is the recommended procedure for cleaning the probe jaws Use a very fine sand paper fine 600 to avoid scratching the jaw then gently clean with a soft oiled cloth REPAIR AND CALIBRATION You must contact our Service Center for a Customer Service Authorization number CSA This will ensure that when your instrument arrives it will be tracked and processed promptly Please write the CSA on the outside of the shipping container If the instrument is returned for calibration we need to know if you want a standard calibration or a calibration traceable to N I S T includes calibration certificate plus recorded calibration data Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive e Dover NH 03820 USA Tel 800 945 2362 Ext 360 603 749 6434 Ext 360 Fax 603 742 2346 or 603 749 6309 repair aemc com Or contact your authorized distributor Costs for repair standard calibration and calibration traceable to N I S T are available NOTE All customers must obtain a CSA before returning any instrument TECHNICAL AND SALES ASSISTANCE If you are experiencing any technical problems or require any assistance with the proper use or application of this instrument please call our technical hotline 800 343 1391 508 698 2115 Fax 508 698 2118 Chauvin Arnoux Inc d b a AEMC Instruments techsupport aemc com www aemc com Shop for
7. und bare conductors or bus bars INTERNATIONAL ELECTRICAL SYMBOLS 0 This symbol signifies that the current probe is protected by double or reinforced insulation Use only factory specified replacement parts when servicing the instrument A This symbol signifies CAUTION and requests that the user refer to the user manual before using the instrument This is a type A current sensor This symbol signifies that application around and removal from HAZARDOUS LIVE conductors is permitted DEFINITION OF MEASUREMENT CATEGORIES Cat l For measurements on circuits not directly connected to the AC supply wall outlet such as protected secondaries signal level and limited energy circuits Cat Il For measurements performed on circuits directly connected to the electrical distribution system Examples are measurements on household appliances or portable tools Cat Ill For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers Cat IV For measurements performed at the primary electrical supply lt 1000V such as on primary overcurrent protection devices ripple control units or meters RECEIVING YOUR SHIPMENT Upon receiving your shipment make sure that the contents are consistent with the packing list Notify your distributor of any missing items If the equipment appears to be damaged file a claim immediately with the carrier and notify
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