AEMC instruments MN312 Manual de usuario

AC Current Probe

Models MN312 and MN313

User Manual

DESCRIPTION

The MN312/313 (Cat. #2116.24/2116.25) 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 200Arms which make them

perfect tools for measurements with DMMs, recorders, power and harmonic meters. The Models

MN312/MN313 are compatible with any AC ammeter, multimeter, or other current measurement with an

input impedance lower than 1 . To achieve the stated accuracy, use the MN312/MN313 with an

ammeter having an accuracy of 0.75% or better.

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

hardwired equipment in fixed installation and circuit breakers.

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.

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ELECTRICAL SPECIFICATIONS

Nominal Range: 0A

Measurement Range: 0.1 to 200A

Transformation Ratio: 1000:1

Output Signal: 1mA/A on 1

Accuracy and Phase Shift*:

Accuracy:

0.1 to 1A: 2.0% Reading ± 0.02mA

1 to 80A: 1% Reading ± 0.02mA

80 to 100A: 1.5% Reading ± 0.1mA

100 to 150A: 2.5% Reading ± 0.5mA

150 to 200A: not specified

Phase Shift:

0.1 to 1A: Not Specified

1 to 20A: 3°

20 to 80A: 2°

80 to 150A: 2.5°

*Reference conditions: 20°C to 26°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 1 .

Frequency Range: 40 to 10kHz

Limit Operating Conditions:

200A permanently to 1kHz;

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

MN312 MN313

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Crest Factor:

3 @ 200A peak max with an error (due to CF)

of 3%

Open Secondary Voltage:

8V peak max.

Working Voltage:

600Vrms

Common Mode Voltage:

600Vrms

Influence of Adjacent Conductor:

< 15mA/A at 50Hz

Influence of DC (< 10A) on AC signal:

< 10%

Influence of Conductor Position in Jaw:

0.5% of mA output @ 50/60Hz

Influence of Frequency:

40Hz to 1kHz: 5% of mV output

1kHz to 10kHz: 15% of mV output

Influence of Load:

From 0.1 to 5 and 0.7V peak max

< 0.5% for output < 0.5° for phase

Influence of Temperature:

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

Influence of Humidity (10 - 90% RH):

0.2% of mA output per 10°K

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” (20mm), bus bar 20 x 5mm

Case Protection:

IP 40 (IEC 529)

Drop Test:

Test per IEC 68-2-32:

1.0m drop on 38mm 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 30mm)

Weight:

6.5oz (180g)

Polycarbonate Material:

Jaws: Polycarbonate with 10% fiberglass charge,

Red UL 94 V0

Case: Polycarbonate 920A Gray

Opening Operations - Life:

> 50,000

Output:

MN312: Two standard safety banana jacks (4mm)

MN313: Double/reinforced insulated 5 ft (1.5m)

lead with safety 4mm banana plug

SAFETY SPECIFICATIONS

AC Current Probe MN312 ................. Cat #2116.24

AC Current Probe MN313 ................. Cat #2116.25

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 Category III, Pollution Degree 2

ORDERING INFORMATION

Accessories:

Lead, set of 2, 5 ft

....

Cat # .

Banana plug adapter

(to non-recessed plug) .......................

Cat #1017.45

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99-MAN 100159 v /

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 MN312/MN313

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

your DMM or other current measuring instrument. Select the appropriate current range (400mA AC

range). Clamp the probe around the conductor to be tested with the arrow pointed toward the load. If

the reading is less than 10mA, select the lower range until you obtain the best resolution. Read the

value display on the DMM and multiply it by the probe ratio (1000/1). (If reading = 102mA, the current

flowing through the probe is 102mA x 1000 = 102000mA AC = 102A).

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.

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:

LIMITED WARRANTY

The current probe is warranted to the owner for a period of year 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.

Please print the online Warranty Coverage Information for your records.

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