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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 JM861
• Connect the black and red terminals to the Volt AC range of your DMM or voltage measuring instrument.
Select the appropriate voltage range. If the current magnitude is unknown, select the highest range
(3000A AC / 3V AC) on the switch probe located inside the handle. Clamp the probe around the
conductor to be tested. If the reading is less than 300mV or 30mV, select the lower range until you
obtain the best resolution. Read the value display on the DMM (in mV) and divide it by the range
selected. (If reading = 2.59V on the 10mV AC/A AC range, the current flowing through the probe is
2590mV ÷ 10 = 259A 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
• 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.
• 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 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 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 promptly. Please write the CSA#
on the outside of the shipping container.
Chauvin Arnoux
15 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 ASSISTANCE
If you are experiencing any technical problems, or require any assistance with the proper use or
application of this instrument, please contact our technical hotline:
(800) 945-2362 (Ext. 351) • (603) 749-6434 (Ext. 351) • techsupport@aemc.com
LIMITED WARRANTY
The current probe is warranted to the owner for a period of 2 years from the date of original purchase
against defects in manufacture. This limited warranty is given by AEMC
the distributor from whom it was purchased. This warranty is void if the unit has been tampered with,
abused or if the defect is related to service not performed by AEMC
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.
®
®
, Inc. d.b.a. AEMC
Instruments
®
Instruments, not by
®
Instruments.
99-MAN 100060.v7 02/18
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