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OPERATION
Making Measurements with the AC Current Probe Model MN114
Connect the black (S2) and red (S1) terminals to the 2 V range of your DMM or instrument. The MN114
has a ratio of 10:1. This means that for 10A AC in the conductor around which the probe is clamped, 1V
AC will come out of the probe leads to your DMM or instrument. The output is 100mV AC per Amp AC.
Select the range on your DMM or instrument which best corresponds to the measured current. If the
magnitude is unknown, start with the highest range (2V AC) then work down until the appropriate range
and resolution is 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., 59mV reading: 59 x 10 = 590mA or 0.59A).
Meter Reading
Measured Value
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.
(Or contact your authorized distributor)
NOTE: All customers must obtain a CSA# before returning any instrument.
LIMITED WARRANTY
The current probe is warranted to the owner for a period of one year from the date of original purchase
against defects in manufacture. This limited warranty is given by AEMC
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.
10mV
100mA = 0.1A
120mV
1200mA = 1.2A
®
Instruments.
1200mV
12000mA = 12.0A
®
Instruments, not by the
99-MAN 100086 v9 07/13
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