AEMC MN251 AC Current Probe Manual PDF
Contents
1. 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 your distributor at once giving a detailed description of any damage GJ AEMG INSTRUMENTS ELECTRICAL SPECIFICATIONS Nominal Range 200 A Measurement Range 0 1 to 240A Transformation Ratio Voltage output Output Signal 1 mV A Accuracy and Phase Shift Accuracy 0 5 to 10 A 3 0 Reading 0 5 mV 10 to 40 A 2 5 Reading 0 5 mV 40 to 100 A 2 0 Reading 0 5 mV 100 to 240 A 1 0 Reading 0 5 mV Phase Shift 0 5 to 10 A Not Specified 10 to 40 A lt 5 40 to 100 A lt 3 100 to 240 A lt 2 5 Reference conditions 18 C to 28 C 20 to 75 RH external magnetic field lt 40 A m 48 to 65 Hz sine wave distortion factor less than 1 no DC component no external current carrying conductor test sample centered Load impedance gt 1 MQ Frequency Range 40 to 10 kHz Limit Operating Conditions 200 A permanently to 1 kHz Derating above 3 kHz 200 A x 1 0 333 F F in kHz Crest Factor 3 200 Arms with an error due to CF of 3 Working Voltage 600 Vrms Common Mode Voltage 600 Vrms Influence of Adjacent Conductor lt 15 mA A at 50 Hz Influence of DC on AC signal DC Current lt 20 A lt 5 Influence of Conductor Position in Jaw 0 5 of mV output 50 60 Hz I2. AC Current Probe Models MN250 and MN251 User Manual DESCRIPTION The MN250 MN251 Catalog 2115 76 and 2115 77 are the latest in compact AC Current probes Designed to meet the most stringent demands in industry and electrical contracting they also meet the latest safety and performance standards The probes have a measurement range up to 240 Arms which makes them perfect tools for measurement with DMMs recorders power and harmonic meters The Models MN250 MN251 are compatible with any AC voltmeter multimeter or other voltage measurement instrument that is capable of displaying 1mV of output per amp of measured current Voltmeter accuracy of 0 75 or better and an input impedance of 2 1 MQ WARNING These safety warnings are provided to ensure the safety of personnel and proper operation of the instrument 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
3. II Pollution Degree 2 Dielectric Strength 5550V 50 60 Hz between primary secondary and the outer case of the handle Electromagnetic Compatibility EN 50081 1 Class B EN 50082 2 Electrostatic discharge IEC 1000 4 2 Radiated field IEC 1000 4 3 Fast transients IEC 1000 4 4 Magnetic field at 50 60 Hz IEC 1000 4 8 ORDERING INFORMATION AC Current Probe MN250 AC Current Probe MN251 Cat 2115 76 ws Cat 2115 77 Both models include a user manual and a product warranty and registration card Accessories Leads set of 2 5 ft safety 1000V for Model MN250 5 Cat 2111 29 Banana plug adapter to nonrecessed plug ee Cat 1017 45 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 MN250 MN251 e Connect the black lead of the current probe to common and the red lead to the AC voltage input on your DMM or other voltage measuring instrument The AC current probe has an output of 1 mV A This means that for 200 A AC in a conductor around which the probe is clamped 200 mV AC will come out of the probe leads to your DMM or instrument Select the range which corresponds to the measured current If the current magnitude is unknown start with the highest range and work down until the appropriate range and resolution are reached Clamp the probe around the conductor Take the reading on
4. ly 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 ee 99 VAN 100139 v5 09 07
5. nfluence of Frequency 40 Hz to 1 kHz 3 of mV output 1 kHz to 10 kHz 12 of mV output Influence of Load lt 3 of mA output from 40 Hz to 1 kHz lt 12 of mA output from 1 kHz to 10 kHz Influence of Temperature lt 150 ppm K or 0 15 of mV output per 10 K Influence of Humidity 10 90 RH lt 0 2 of mV output per 10 K 18 C to 28 C MECHANICAL SPECIFICATIONS Operating Temperature 14 to 131 F 10 to 55 C Storage Temperature 40 to 158 F 40 to 70 C Operating Relative Humidity 10 35 C 85 RH without roll off above 35 C Maximum Cable Diameter One 0 78 20 mm bus bar 20 x 5 mm Case Protection IP 40 IEC 529 Drop Test Test per IEC 68 2 32 1 0 m drop on 38 mm of Oak on concrete Mechanical Shock Test per IEC 68 2 27 Vibration Test per IEC 68 2 6 Dimensions 5 47 x 2 00 x 1 18 139 x 51 x 30 mm Weight 180 g 6 5 oz Polycarbonate Material Jaws Polycarbonate with 10 fiberglass charge Red UL 94 VO Case Polycarbonate 920A Gray Opening Operations Life gt 50 000 Output MN250 Two standard safety banana jacks 4 mm MN251 Double reinforced insulated 5 ft 1 5 m lead with safety 4mm banana plug SAFETY SPECIFICATIONS ce ol cM us LISTED Electrical E192383 Double insulation or reinforced insulation between the primary or secondary and the outer case of the handle conforms to IEC 1010 2 32 Common Mode Voltage 600V Category I
6. parts immediately NEVER use the current probe on electrical conductors rated above 600V in overvoltage category Ill CAT III Use extreme caution when clamping around bare conductors or bus bars INTERNATIONAL ELECTRICAL SYMBOLS This symbol signifies that the current probe is protected by double or reinforced insulation Use o 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
7. the meter and multiply it by 1000 to obtain the measured current e g 150 mV reading 150 x 1000 150 000 mA or 150 A e For best accuracy 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 Warning For maintenance use only original factory replacement parts 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 Cleaning To ensure optimum performance it is important to keep the probe jaw mating surfaces clean at all times Failure to do so may result in error in readings To clean the probe jaws use 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 prompt
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