AEMC instruments MN134 User manual

AC Current Probe
Model MN134
User Manual
DESCRIPTION
The AEMC®Instruments Model MN134 (Cat. #2129.22) is a small, compact AC current
probe and is designed to meet the most stringent demands in industry and electrical
contracting. This instrument meets the latest safety and performance standards. The probe
has a measurement range up to 10 Arms which makes it a perfect tool for measurement
with DMMs and recorders. The Model MN134 is compatible with any AC multimeter, or other
voltage measurement instrument with an input impedance greater than 1 MΩ. To achieve the
stated accuracy, use the probe with a voltmeter with an accuracy of 0.75 % or better.
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: high voltages and currents may be present and may pose a shock
hazard.
• Read the Safety Specications section prior to using the current probe. 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 600 V in overvoltage
category III (CAT III). Use extreme caution when clamping around bare conductors or bus bars.
INTERNATIONAL ELECTRICAL SYMBOLS
This symbol signies that the current probe is protected by double or reinforced insu-
lation. Use only factory-specied replacement parts when servicing the instrument.
This symbol signies CAUTION! and requests that the user refer to the user
manual before using the instrument.
This symbol signies that this is a type A current sensor and that application near
and removal from HAZARDOUS LIVE conductors is permitted.
This symbol signies a voltage limiting circuit.
DEFINITION OF MEASUREMENT CATEGORIES (CAT)
CAT IV: For measurements performed at the primary electrical supply (< 1000 V), such as
primary overcurrent protection devices, ripple control units, or meters.
CAT III: For measurements performed in the building installation at the distribution level,
such as hardwired equipment in xed installation or circuit breakers.
CAT II: For measurements performed on circuits directly connected to the electrical
distribution system, such as measurements on household appliances or portable tools.

ELECTRICAL SPECIFICATIONS
Nominal Range:
10 AAC
Measurement Range:
1 mA to 10 AAC
Output Signal:
100 mVAC / AAC (1 V @ 10 A)
Accuracy and Phase Shift*:
Accuracy: 1 MΩ load: 2 % Reading ± 2 mA
Phase Shift: < 10 °
*Reference conditions: (18 to 28) °C,
(20 to 75) % RH, external magnetic eld
< 40 A/m, (48 to 65) Hz sine wave,
distortion factor less than 1 %, no DC
component, no external current carrying
conductor, test sample centered.
Load impedance: 1 MΩ
Overload:
20 A continuous
Frequency Range:
(48 to 500) Hz
Load impedance:
1 MΩ min
Open Secondary Voltage:
≤ 30 V
Working Voltage:
600 Vrms
Common Mode Voltage:
600 Vrms
Inuence of Adjacent Conductor:
< 2 mA/A at 50 Hz
Inuence of Conductor Position in Jaw:
< 0.1 % of mA output at 50/60 Hz
RECEIVING YOUR SHIPMENT
Upon receiving your shipment, make sure that the contents are consistent with the packing
list. Notify your distributor of any missing items. If the equipment appears to be damaged,
le a claim immediately with the carrier and notify your distributor at once, giving a detailed
description of any damage.
CURRENT PROBE - MN134 DRAWING
1.02"
(26 mm)
1.48"
(37.5 mm)
4.43"
(112.5 mm)
Ø 0.39" max.
(10 mm)

Inuence of Frequency:
< 2 % of mA output from (65 to 500) Hz
Inuence of Temperature:
≤ 0.2 % per 10 °K
Inuence of Humidity (10 to 90% RH):
≤ 0.1 % of mA
MECHANICAL SPECIFICATIONS
Operating Temperature:
(14 to 122) °F (-10 to +50) °C
Storage Temperature:
(-40 to 176) °F (-40 to +80)°C
Maximum Cable Diameter:
One Ø 0.39 in (10 mm)
Case Protection:
IP 40 (IEC 60529)
Drop Test:
Test per IEC 60068-2-32:
1.0 m drop on 38 mm of Oak on concrete
Mechanical Shock:
Test per IEC 60068-2-27
Vibration:
Test per IEC 60068-2-6
Dimensions:
(5.12 x 1.46 x 0.985) in (130 x 37 x 25) mm
Weight: 180 g (6.5 oz)
Polycarbonate Material:
Jaws: Red Polycarbonate
Case: Dark Polycarbonate
Opening Operations - Life:
> 50,000
Output:
Double/reinforced insulated 5 ft (1.5 m) lead
with safety 4 mm banana plug
Altitude:
< 2000 m
Indoor use only
SAFETY SPECIFICATIONS
Electrical:
Conforms to IEC 61010-2-32. ed. 2 2003
Common Mode Voltage:
600 V CAT III, Pollution Degree 2
Electromagnetic Compatibility:
EN 61326-1
ORDERING INFORMATION
AC Current Probe MN134 ..... Cat. #2129.22
Includes user manual.
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 MN134
• Connect the black lead of the current probe to “common” and the red lead to the AC
voltage input on your DMM. Select the appropriate range (2 VAC range). Clamp the
probe around the conductor to be tested. If the reading is less than 200 mV, select the
lower range until you obtain the best resolution. Read the value display on the DMM
and multiply it by the probe ratio (100/1). (If reading = 159 mV, the current owing
through the probe is
159 x 100 = 1590 mAAC or 1.59 AAC)
• For best accuracy, avoid taking measurements in the proximity of other conductors if
possible. The other conductors may create noise that will a󰀨ect the accuracy of the
measurement.
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. It is
critical for power measurement. Contaminants cause air gaps between the jaws,
which increases the phase shift between primary and secondary.

MAINTENANCE
Warning
• This product does not have replacement parts.
• To avoid electrical shock, do not attempt to perform any service on the device unless
you are qualied to do so.
• To avoid electrical shock and/or damage to the instrument, do not allow water or other
foreign agents to come into contact with 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 ne sand paper (ne 600) to avoid scratching the jaw, and then gently clean with a
soft, oiled cloth.
REPAIR AND CALIBRATION
A calibration check is recommended once per year. No adjustment is possible.
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 certicate plus recorded calibration data).
Ship To: Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments
15 Faraday Drive ▪ Dover, NH 03820 USA
Phone: [phone] (Ext. 360) •[phone] (Ext. 360)
Fax: [phone]
E-mail: [email protected]
(Or contact your authorized distributor)
Contact us for the costs for repair, standard calibration, and calibration traceable to N.I.S.T.
NOTE: You 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
operation or application of your instrument, please call, e-mail or fax our technical support
team:
Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments
Phone: [phone] (Ext. 351) •[phone] (Ext. 351)
Fax: [phone] or E-mail: techsuppor[email protected] www.aemc.com
LIMITED WARRANTY
The current probe is warrantied to the owner for a period of two years from the date of
original purchase against defects in manufacture. This limited warranty is given by
AEMC®Instruments, not by the 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® Instruments.
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.
99-MAN 100576.v00 05/23