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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 MN373
Connect the black lead of the current probe to "common" and the red lead to the AC v oltage input on
your DMM or other v oltage-measuring instrument. The AC current probe has an output of 10mV/A and
1000mV/A. This means that with the probe in t he 10mV/A position, for 200A AC in a conductor around
which the probe is clamped, 2V AC will come out of the probe leads to your DMM or instrument. Select
the range w hich corresponds to the measured current. If the current m agnitude is unknow n, start with
the probe in the 10mV/A pos ition and if the current is < 2 am
1000mV/A position for the higher re solution. Clamp the probe around the conductor. W ith the probe in
the 10mV/A position take the r eading on the meter and multiply it by 100 to obtain the measured
current (e.g, 160mV reading = 160 x 100 = 16,000mA or 16A).
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 w ith a meter, it is im portant to select the r ange that prov ides the best
resolution. Failure to do this may result in measurement errors.
Make sure that probe jaw mating surfaces are fr ee 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 w ater or other foreign agents
into the probe
Cleaning
To ensure optimum performanc e, 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 jaw s, use v ery 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 Serv ice Cent er for a Customer Serv ice Author ization number (CSA#). This
ensure that when your instrument arrives, it will be tracked and processed promptly. Please write the CSA#
on the outside of the shipping container.
(Or contact your authorized distributor)
NOTE: All customers must obtain a CSA# before returning any instrument.
LIMITED WARRANTY
The current probe is w arranted to the owner for a period of one y ear from the dat e of original purchase
against defects in manufacture. This
distributor from whom it was purchased. This warranty is void if the unit has been tampered w ith, 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.
limited w arranty is giv en by AEMC
®
ps the probe can be
®
Instruments, not by
Instruments.
99-MAN 100161.v9 07/13
switched to the
will
the
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