Aemc instruments MN379 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 MN379

 Connect the black lead of the current probe to “common” and the red lead to the AC voltage input on

your DMM or other voltage-measuring instrument. The AC current probe has an output of 200mV/A and
10mV/A. This means that with the probe in the 10mV/A position, for 100A AC in a conductor around
which the probe is clamped, 1V AC will come out of the probe leads to your DMM or instrument. Select
the range which corresponds to the measured current. If the current magnitude is unknown, start with
the probe in the 10mV/A position and if the current is < 5 amps the probe can be switched to the
200mV/A position for the higher resolution. Clamp the probe around the conductor. With the probe in
the 10mV/A position take the reading on the meter and multiply it by 100 to obtain the measured current
(e.g, 160mV reading = 160 x 100 = 16,000mA or 16A).

 The 5A range is design to measure on 5A current transformer. The output is 1V rms for 5A measured.

Enter a scale factor in the meter if possible for direct reading.

 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.

Chauvin Arnoux
15 Faraday Drive  Dover, NH 03820 USA

[phone] (Ext. 360) • [phone] (Ext. 360) • [e-mail]

(Or contact your authorized distributor)

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 contact our technical hotline:

[phone] (Ext. 351) • [phone] (Ext. 351) • [e-mail]

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 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.

®

, Inc. d.b.a. AEMC® Instruments

AC Current Probe
Model MN379

User Manual

DESCRIPTION

The MN379 (Catalog #2153.01) is the latest in compact AC current probes. Designed to meet the most
stringent demands in industry and electrical contracting, it also meets the latest safety and performance
standards. The probe has a measurement range up to 120Arms, a range and resolution capable of
displaying 10mV of output per amp of measured current, a voltmeter accuracy of 0.5% or better to take
full advantage of the accuracy of the probe and an input impedance of 1M.

WARNING

The safety warnings are provided to ensure the safety of personnel and proper operation of the
instrument. Read the instruction completely.

• Use caution on any circuit: potentially high voltages and currents may be present and may pose
a shock hazard.

• Do not use the probe if damaged. Always connect the current probe to the measuring device
before it is connected around the conductor

• Do not use on non-insulated conductor with a potential to ground greater than 600V CAT III
pollution 2. Use extreme caution when clamping around bare conductors or bus bars.

• Before each use, inspect the probe; look for cracks in housing or output cable insulation.

• Do not use clamp in wet environment or in locations that hazardous gases exist.

• Do not use the probe anywhere beyond the tactile barrier.

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 A current sensor. This symbol signifies that application around and removal
from HAZARDOUS LIVE conductors is permitted.

DEFINITION OF MEASUREMENT CATEGORIES

CAT IV: For measurements performed at the primary electrical supply (<1000V) such as on primary

overcurrent protection devices, ripple control units, or meters.

CAT III: For measurements performed in the building installation at the distribution level such as on

hardwired equipment in fixed installation and circuit breakers.

CAT II: For measurements performed on circuits directly connected to the electrical distribution system.

Examples are measurements on household appliances or portable tools.

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

99-MAN 100373.v5 3/18

ELECTRICAL SPECIFICATIONS

Nominal Range: 5A, 100A

Measurement Range: 5A: 0.005 to 6A

100A: 0.1 to 120A

Transformation Ratio: Voltage output

Output Signal: 5A: 200mV/A

100A: 10mV/A

Accuracy and Phase Shift*:

5A Range - Accuracy

Ip 0.005A 0.05A 0.5A 5A

1.

+0.

5 %

02mV

1.5% 1% 1%

Vs %

Phase 6.5 ° 5 ° 4.5 ° 4 °

100A Range - Accuracy

Ip 0.1A 1A 10A 100A

Vs %

Phase 3.2 ° 2.2° 2.2 ° 2.2 °

*Reference conditions: 18°C to 28°C, 20 to 75% RH,
external magnetic field <40 A/m, 48 to 65Hz sine wave,
distortion factor less than 1%, no DC component, no
external current carrying conductor, test sample
centered. Load impedance > 1M.

1%

+0.02mV

1% 1% 1%

Frequency Range: 40 to 10kHz

Limit Operating Conditions:

200A MAX to 1kHz; Derating above 1kHz:
200A x (1*F), F in kHz

Working Voltage: 600Vrms

Common Mode Voltage:
600Vrms

Influence of Adjacent Conductor:

< 15mA/A at 50Hz

Influence of DC on AC signal:

5A Range: DC Current < 1A, < 3%
100A Range: DC Current < 10A, < 10%

Influence of Conductor Position in Jaw:

0.5% of mV output @ 50/60Hz

Influence of Frequency:

5A Range:
40Hz to 1kHz: <0.7% of mV output
1kHz to 3kHz: <2%% of mV output

150A Range:
40Hz to 1kHz: <0.7% of mV output
1kHz to 3kHz: <0.7% of mV output

Influence of Temperature:

 200 ppm/°K, or 0.2% of mV output
per 10°K

Influence of Humidity (10 to 90% RH):

 0.2% of mV output per 10°K @ 18° to 28°C

MECHANICAL SPECIFICATIONS

Operating Temperature:

14° to 131°F (-10° to +55°C)

Storage Temperature:

-40° to 158°F (-40° to +70°C)

Operating Relative Humidity:

10° to 35°C 85% RH
(without roll-off above 35°C)

Maximum Cable Diameter:

One Ø 0.78" (20mm), bus bar 20 x 5 mm

Case Protection:

IP 40 (IEC 529)

Drop Test:

Test per IEC 68-2-32:

1.0 m drop on 38mm of Oak on concrete
Test per IEC 68-2-27

Vibration:

Test per IEC 68-2-6

Dimensions:

5.47 x 2.00 x 1.18"
(139 x 51 x 30mm)

Weight:

180g (6.5oz)

Polycarbonate Material:

Jaws: Polycarbonate with 10% fiberglass
charge, Red UL 94 V0
Case: Polycarbonate 920A Gray

Opening Operations - Life: > 50,000

Output:

Double/reinforced insulated 5 ft (1.5m) lead
with safety 4mm banana plug

SAFETY SPECIFICATIONS

Electrical:

Double insulation or reinforced insulation
between the primary or secondary and the
outer case of the handle conforms to IEC
1010-2-32.

Common Mode Voltage:

600V CAT III, Pollution Degree 2

Electromagnetic Compatibility:

Emissivity: EN61326-1 Class B
Electrostatic discharge IEC 1000-4-2
Radiated field IEC 1000-4-3
Fast transients IEC 1000-4-4
Magnetic field at 50/60Hz IEC 1000-4-8

ORDERING INFORMATION

AC Current Probe MN379 ....... Cat #2153.01

Accessories:

Banana plug adapter

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

Adapter - Banana (Female) -

BNC (Male) (XM-BB) ................ Cat #2118.46