AEMC instruments JM835A User Manual

AEMC instruments JM835A User Manual Manual pdf 1 page image

OPERATIONPlease make sure that you have already read and fully understand the WARNING section on page 1.Making Measurements with the AC Current Probe Model JM835A• Connect the black and red terminals to the Ampere AC range of your DMM or current measuringinstrument. Select the appropriate current range (5A AC). Clamp the probe around the conductor to betested. If the reading is less than 2 A, select the lower range until you obtain the best resolution. Read thevalue display on the DMM and multiply it by the probe ratio (3000/5 = 600). (If reading = 0.592A AC, thecurrent flowing through the probe is 0.592 A x 600 = 355.2 A).• For best accuracy: carefully center the conductor inside the probe jaw, avoid if possible, the proximity ofother conductors which may create noise.Tips for Making Precise Measurements• When using a current probe with a meter, it is important to select the range that provides the bestresolution. Failure to do this may result in measurement errors.• Make sure that probe jaw mating surfaces are free of dust and contamination. Contaminants cause airgaps between the jaws, increasing the phase shift between primary and secondary. It is very critical forpower measurement.MAINTENANCE:Warning• For maintenance use only original replacement parts.• To avoid electrical shock, do not attempt to perform any servicing unless you are qualified to do so.• To avoid electrical shock and/or damage to the instrument, do not get water or other foreign agents intothe probe.CleaningTo 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 a very fine sand paper (fine600) to avoid scratching the jaw, then gently clean with a soft, oil cloth.REPAIR AND CALIBRATIONYou must contact our Service Center for a Customer Service Authorization number (CSA#). This will ensurethat when your instrument arrives, it will be tracked and processed promptly. Please write the CSA# on theoutside of the shipping container.Chauvin Arnoux®, Inc. d.b.a. AEMC ® Instruments15 Faraday Drive • Dover, NH 03820 USA(800) 945-2362 (Ext. 360) • (603) 749-6434 (Ext. 360) • repair@aemc.com(Or contact your authorized distributor)NOTE: All customers must obtain a CSA# before returning any instrument.TECHNICAL AND SALES ASSISTANCEIf you are experiencing any technical problems, or require any assistance with the proper use or applicationof this instrument, please contact our technical hotline:(800) 945-2362 (Ext. 351) • (603) 749-6434 (Ext. 351) • techsupport@aemc.comLIMITED WARRANTYThe current probe is warranted to the owner for a period of two years from the date of original purchaseagainst defects in manufacture. This limited warranty is given by AEMC ® Instruments, not by the distributorfrom whom it was purchased. This warranty is void if the unit has been tampered with, abused or if thedefect is related to service not performed by AEMC® Instruments.Full warranty coverage and product registration is available on our website at:www.aemc.com/warranty.html.Please print the online Warranty Coverage Information for your records.AC Current ProbeModel JM835AUser ManualDESCRIPTIONThe JM835A (Catalog #2110.84) is designed for use in industrial environments. The “squared” jaws permitmultiple conductor or bus bar positioning. The current output makes it the perfect tool for measurementwith DMMs, recorders, power and harmonic meters. The Model JM835A is compatible with any ACAmmeter, multimeter, or other current measuring instrument with an input impedance lower than 1Ω. Toachieve the stated accuracy, use the JM835A with the DMM having an accuracy of 0.75%.WARNINGThese safety warnings are provided to ensure the safety of personnel and proper operation of theinstrument.• Read the instruction manual completely and follow all the safety information before attempting touse or service this instrument.• Use caution on any circuit: Potentially high voltages and currents may be present and may posea shock hazard.• Read the Safety Specifications section prior to using the current probe. Never exceed themaximum voltage ratings given.• Safety is the responsibility of the operator.• ALWAYS connect the current probe to the display device before clamping the probe onto thesample being tested.• ALWAYS inspect the instrument, probe, probe cable, and output terminals prior to use. Replaceany defective parts immediately.• NEVER use the current probe on electrical conductors rated above 600V in overvoltage categoryIII (CAT III). Use extreme caution when clamping around bare conductors or bus bars.INTERNATIONAL ELECTRICAL SYMBOLSThis symbol signifies that the current probe is protected by double or reinforced insulation. Useonly factory specified replacement parts when servicing the instrument.This symbol signifies CAUTION! and requests that the user refer to the user manual beforeusing the instrument.This is a type A current sensor. This symbol signifies that application around and removalfrom HAZARDOUS LIVE conductors is permitted.DEFINITION OF MEASUREMENT CATEGORIESCat. IV: For measurements performed at the primary electrical supply (<1000V) such as on primaryovercurrent protection devices, ripple control units, or meters.Cat. III: For measurements performed in the building installation at the distribution level such as onhardwired equipment in fixed installation and circuit breakers.Cat. II: For measurements performed on circuits directly connected to the electrical distribution system.Examples are measurements on household appliances or portable tools.RECEIVING YOUR SHIPMENTUpon receiving your shipment, make sure that the contents are consistent with the packing list. Notify yourdistributor of any missing items. If the equipment appears to be damaged, file a claim immediately with thecarrier and notify your distributor at once, giving a detailed description of any damage.99-MAN 100077.v8 02/18

/ 2

Related manuals for AEMC instruments 2110.84