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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 MN312/MN313
Connect the black lead of the curr ent probe to "common" and the red lead to the AC current input on
your DMM or other current meas uring instrument. Select the appr opriate current range (400mA AC
range). Clamp the probe around the conductor to be tested with the arrow pointed tow ard the load. If
the reading is less than 10mA, sele ct the low er range until you obtain the best resolution. Read the
value display on the DMM and multiply it by the probe ratio (1000/1). (If reading = 102mA, the current
flowing through the probe is 102mA x 1000 = 102000mA AC = 102A).
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.
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
®
®
Instruments, not by
Instruments.
99-MAN 100159 v9 07/13
the
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