AEMC instruments MN185 User manual
AC Current Probe
Model MN185
User Manual
DESCRIPTION
The MN185 (Catalog #100.185) is a high accuracy current probe for tight areas
such as crowded wiring. Extends DMM AC measurements to 120A AC.
WARNING
These safety warnings are provided to ensure the safety of personnel and
proper operation of the instrument.
• Read the instruction manual completely and follow all the safety information
before attempting to use or service this instrument.
• Use caution on any circuit: Potentially high voltages and currents may be
present and may pose a shock hazard.
Never exceed the maximum voltage ratings given.
• Safety is the responsibility of the operator.
• ALWAYS connect the current probe to the display device before clamping
the probe onto the sample being tested.
• ALWAYS inspect the instrument, probe, probe cable, and output terminals
prior to use. Replace any defective parts immediately.
• NEVER use the current probe on electrical conductors rated above 250V.
Use extreme caution when clamping around bare conductors or bus bars.
INTERNATIONAL ELECTRICAL SYMBOLS
before using the instrument.
RECEIVING YOUR SHIPMENT
Upon receiving your shipment, make sure that the contents are consistent with
distributor at once, giving a detailed description of any damage.
INSTRUMENT COMPATIBILITY
The Model MN185 is compatible with any ammeter, multimeter, or other current
measuring instruments with an input impedance of less than 5W. To achieve the
stated accuracy, use the MN185 with an ammeter having an accuracy of 0.75%
or better.
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CURRENT PROBE - MN 185 DRAWING
ELECTRICAL SPECIFICATIONS
Current Range:
50mA to 120A AC, continuous
Output Signal:
1mA AC / A AC (120mA @ 120A)
Accuracy:
50mA to 100A: 1% ± 0.01A
(with non-inductive load)
100A to 120A: 1.5% ± 0.01A
Phase Shift*:
from 1 to 100A, 50 to 60Hz
no DC component, no external current
carrying conductor, test sample centered.)
Load impedance 1 .
Overload:
170A continuously
Frequency Range:
Load Impedance:
5 max
Working Voltage:
250V AC
Common Mode Voltage:
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OPERATION
Making Measurements with the AC Current Probe Model MN185
• Connect the terminals to the 200mA range of your DMM or instrument. The
MN185 has a ratio of 1000:1. This means that for 100A AC in the conductor
around which the probe is clamped, 100mA AC will come out of the probe
leads to your DMM or instrument. The output is 1mA AC per Amp. Select
the range on your DMM or instrument which best corresponds to the measured
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 1000 to obtain the measured current (e.g., 59mA reading: 59 x 1000 =
59,000mA or 59A).
• 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.
MECHANICAL SPECIFICATIONS
Operating Temperature:
Storage Temperature:
Maximum Conductor Size:
Dimensions:
Weight: 5.6 oz (160g)
Colors:
Dark gray handles with red cover
Polycarbonate Material:
Handle: 10% Fiberglass charged
Output:
SAFETY SPECIFICATIONS
Electrical:
and ground
ORDERING INFORMATION
AC Current Probe
MN185................................Cat #100.185
Accessories:
Safety Leads.......................
Lead-Set of 2, 5 ft color-coded (red/black)
.... Cat #5100.07
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99-MAN 100008 V15 01/22
• Make sure that probe jaw mating surfaces are free of dust and contamination.
Contaminants cause air gaps between the jaws, increasing the phase shift
MAINTENANCE
Warning:
• For maintenance use only original factory replacement parts.
• To avoid electrical shock, do not attempt to perform any servicing unless you
• 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
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.
NOTE: All customers must obtain a CSA# before returning any instrument.
TECHNICAL AND SALES ASSISTANCE
the proper use or application of this instrument, please contact our technical
LIMITED WARRANTY
The current probe is warranted to the owner for a period of two years from the
date of original purchase against defects in manufacture. This limited warranty is
This warranty is void if the unit has been tampered with, abused or if the defect is
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