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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 MN375
• 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 100mV/A.
This means that for 10A AC in a conductor around which the probe is clamped, 1V 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 the meter and multiply it by 10 to obtain the measured current (e.g, 160mV reading = 160 x
10 = 1,600mA or 1.6A).
• For best accuracy, 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 factory 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. 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
15 Faraday Drive • 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
techsupport@aemc.com
www.aemc.com
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1.877.766.5412
99-MAN 100216.v6 04/07
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