Aemc instruments MN306, MN307 User Manual

AC Current Probe
Models MN306 and MN307

User Manual

DESCRIPTION

The MN306/307 (Catalog #2116.22 and #2116.23) 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 12Arms which
make them perfect tools for measurements with DMMs, recorders, power and harmonic meters. The
Models MN306/MN307 are compatible with any AC voltmeter, multimeter, or other voltage
measurement instrument that is capable of displaying 100mV of output per amp of measured current,
voltmeter accuracy of 0.75% or better and an input impedance of ≥ 1MΩ.

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 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 600V in overvoltage
category III (CAT III). Use extreme caution when clamping around bare conductors or bus bars.

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.

2.56"

(65 mm)

.83"

(21 mm)

5.47"

(139 mm)

2.00"

(51 mm)

MN306 MN307

(18.5 mm)

.1.18"

.73"

Black

Red

(30 mm)

ELECTRICAL SPECIFICATIONS

Nominal Range: 10A
Measurement Range: 0.1 to 12A
Transformation Ratio: Voltage output
Output Signal: 100mV/A (1V at 10A)
Accuracy and Phase Shift*:

Accuracy:

0.1 to 0.5A: ≤ 2.5% Reading ± 0.1mV

0.5 to 1A: ≤ 2.5% Reading
1 to 12A: ≤ 1% Reading

Phase Shift:

.01 to 0.1A: Not Specified

0.1 to 1A: ≤ 5°
1 to 5A: ≤ 3°
5 to 12A: ≤ 2.5°

*Reference conditions: 20°C to 26°C, 20 to 75% RH,
external magnetic field <40A/m, 48 to 65Hz sine wave,
distortion factor less than 1%, no DC component, no
external current carrying conductor, test sample centered.
Load impedance > 1MΩ.

Frequency Range: 40 to 10kHz
Limit Operating Conditions:

20A permanently to 10kHz;
Derating above 10kHz: 20A x 0.1F (in kHz)