Aemc instruments Mn290 User manual

99-MAN 100142.v5 04/11

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 MN290/MN291

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

your DMM or other voltage measuring instrument. The AC current probe has an output of 100 mV DC/A

AC. This means that for 200 A AC in a conductor around which the probe is clamped, 20 V DC 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 highest range and work down until the

appropriate range and resolution are 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, 1000 mV DC reading = 1000 x 10

= 10,000 mA AC or 10 AC)

• 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

Models MN290 and MN291

User Manual

DESCRIPTION

The MN290/MN291 (Catalog #2115.83 and #2115.84) are the latest in compact AC Current probes.

Designed to meet the most stringent demands in industry and electrical contracting, they also meet the

latest safety and performance standards. The probes have a measurement range up to 240 Arms which

makes them perfect tools for measurement with DMMs without AC range, recorders. The Models

MN290/MN291 are compatible with any DC voltmeter, multimeter, or other voltage measurement

instrument that is capable of displaying 100 mV of output per amp of measured current, voltmeter

accuracy of 0.75% or better and an input impedance of ≥1 MΩ.

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 I: For measurements on circuits not directly connected to the AC supply wall outlet such as

protected secondaries, signal level, and limited energy circuits.

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

Examples are measurements on household appliances or portable tools.

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

overcurrent protection devices, ripple control units, or meters.

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.

ELECTRICAL SPECIFICATIONS

Nominal Range: 200 A

Measurement Range: 0.5 to 240 A

Transformation Ratio: DC Voltage output

Output Signal: 100 mV DC/A AC

Accuracy and Phase Shift*:

Accuracy: 0.5 to 10 A: 3.0% Reading ± 50 mV

10 to 40 A: 2.5% Reading ± 50 mV

40 to 100 A: 2.0% Reading ± 50 mV

100 to 240 A: 2% Reading

Phase Shift: Not applicable

(*Reference conditions: 18°C to 28°C, 20 to 75% RH,

external magnetic field <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 MΩwith 2s RC filter.

Overload: 240 A for 10 min ON, 30 min OFF

Frequency Range: 40 to 10 kHz

Limit Operating Conditions:

200 A permanently to 1 kHz

Derating above 3 kHz: 200 A x (1/0.333 F), F in kHz

Crest Factor:

3 @ 200 Arms with an error (due to CF) of 3%

Working Voltage: 600 Vrms

Common Mode Voltage: 600 Vrms

Influence of Adjacent Conductor:

< 15 mA/A at 50 Hz

Influence of DC on AC signal:

DC Current < 20 A, < 5%

Influence of Conductor Position in Jaw:

0.5% of mV output @ 50/60 Hz

Influence of Frequency:

40 Hz to 1 kHz: 5% of mV output

1 kHz to 10 kHz: 12% of mV output

Influence of Load:

< 3% of mA output from 40 Hz to 1 kHz

< 12% of mA output from 1 kHz to 10 kHz

Influence of Temperature:

≤150 ppm/°K, or 0.15% of mV output per 10°K

Influence of Humidity (10 - 90% RH):

≤0.2% of mV output per 10°K @ 18°C 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:

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

Maximum Cable Diameter:

One Ø 0.78” (20 mm), 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 38 mm of

Oak on concrete.

Mechanical Shock:

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 30 mm)

Weight: 180 g (6.5 oz)

Polycarbonate Material:

Jaws: Polycarbonate with 10% fiberglass charge,

Red UL 94 V0

Case: Polycarbonate 920A Gray

Opening Operations - Life: > 50,000

Output:

MN290: Two standard safety banana jacks (4 mm)

MN291: Double/reinforced insulated 5 ft. (1.5 m)

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:

600 V Category III, Pollution Degree 2

Dielectric Strength:

5550 V, 50/60 Hz between primary, secondary

and the outer case of the handle

Electromagnetic Compatibility:

EN 50081-1 Class B

EN 50082-2 Electrostatic discharge

IEC 1000-4-2

Radiated field IEC 1000-4-3

Fast transients IEC 1000-4-4

Magnetic field at 50/60 Hz IEC 1000-4-8

ORDERING INFORMATION

AC Current Probe MN290.................Cat #2115.83

AC Current Probe MN291.................Cat #2115.84

Both models include a user manual and a

product warranty and registration card.

Accessories:

Leads, set of 2, 5 ft safety

(1000V) for Model MN290................... Cat #2111.29

Banana plug adapter

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

E192383

2.56"

(65 mm)

5.47"

(139 mm)

.83"

(21 mm)

Black

Red

.73"

2.00"

(51 mm)

(18.5 mm)

.1.18"

(30 mm)

Tactical

Barrier

(keep hands below

this barrier)

MN290 MN291