Aemc Mn125 User manual

99-MAN 100317.v1 09/06

OPERATION

Making Measurements with the AC Current Probe Model MN125

• Connect the black (S2) and red (S1) terminals to the 2V range of your DMM or instrument. The MN125

has a ratio of 100:1. This means that for 100A 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 10mV AC per Amp.

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 100 to obtain the measured current (e.g., 59mV reading: 59 x 100 = 5900mA or 5.9A).

• 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. 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 certificate plus

recorded calibration data).

Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments

15 Faraday Drive •Dover, NH 03820 USA

Tel: (800) 945-2362 (Ext. 360)

(603) 749-6434 (Ext. 360)

Fax: (603) 742-2346 or (603) 749-6309

[email protected]

(Or contact your authorized distributor)

Costs for repair, standard calibration, and calibration traceable to N.I.S.T. are available.

NOTE: All customers 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 use or

application of this instrument, please call our technical hotline:

(800) 343-1391 • (508) 698-2115 • Fax (508) 698-2118

Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments

[email protected]

www.aemc.com

AC Current Probe

Model MN125

User Manual

DESCRIPTION

The MN125 (Catalog #2129.14) is a high accuracy current probe for tight areas such as crowded

wiring. Extends DMM AC measurements to 100AAC. The Model MN125 offers a 5 ft lead with safety

4mm banana plug.

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.

• Read the Safety Specifications 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 300V in overvoltage

category III (CAT III). Use only on insulated conductors.

INTERNATIONAL ELECTRICAL SYMBOLS

This symbol signifies that the current probe is protected by double or reinforced insulation. Use

only factory specified replacement parts when servicing the instrument.

This symbol signifies CAUTION! and requests that the user refer to the user manual before

using the instrument.

This is a type B current sensor. Do not apply around or remove from HAZARDOUS LIVE

conductors without additional protective means (de-energizing the circuit or wearing protective

clothing suitable for high voltage work).

In conformity with WEEE 2002/96/EC

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, file a claim immediately

with the carrier and notify your distributor at once, giving a detailed description of any damage.

PACKAGING

The AC Current Probe MN125 is shipped with this instruction manual and a product warranty and

registration card.

INSTRUMENT COMPATIBILITY

The Model MN125 is compatible with any voltmeter, multimeter, or other current measuring instruments

with an input impedance of less than >1MΩ. To achieve the stated accuracy, use the MN125 with a

voltmeter having an accuracy of 0.75% or better. The accuracy of the meter must be added to the probe

accuracy.

ELECTRICAL SPECIFICATIONS

Current Range: 0.5 to 100AAC,

continuous

Output Signal: 10mVAC/AAC (1V @ 100A)

Accuracy*:

0.5 to 100A: 2% ± 0.05mV

(with non inductive load)

Phase Shift: N/A

(*Reference conditions: 23°C ± 3°K,

20 to 70% RH, external magnetic field

< 40 A/m, 50 to 60Hz sine wave, no

DC component, no external current

carrying conductor, test sample

centered.) Load impedance 1MΩ.

Overload:

150A continuously

Frequency Range:

45 to 65Hz

Load Impedance:

1MΩ

Working Voltage:

300V on insulated conductor

Common Mode Voltage:

100VAC Cat. III

MECHANICAL SPECIFICATIONS

Operating Temperature:

-13° to 122°F (-25° to 50°C)

Storage Temperature:

-40° to 176°F (-40° to 80°C)

Maximum Cable Diameter:

0.43” Ø max. (11mm)

Dimensions:

1.4 x 4.53 x 0.87"

(36 x 115 x 22mm)

Weight:

160 g (6 oz)

Colors:

Dark gray handles with red cover

Polycarbonate Material:

Handle: 10% Fiberglass charged

polycarbonate UL 94 V0

Output:

Double/reinforced insulated 5 ft (1.5 m) lead

with safety 4mm banana plug

SAFETY SPECIFICATIONS

Electrical:

300V working voltage on insulated conductor

100V max common mode between output

and ground, Cat. III

3kV 50/60Hz dielectric for 1mn

ORDERING INFORMATION

AC Current Probe MN125........Cat #2129.14

Accessories:

Banana plug adapter

(to non-recessed plug) ..............Cat #1017.45

Black

Red

0.87" (22mm)

1.36" (35mm)

4.53" (115mm)

Ø=0.43" max

(11mm)

1.4" (36mm)