AEMC INSTRUMENTS MN93-BK (01) PDF Document

The protection assured by the current probe can be compromised if it is used in a way that is not recommended by the manufacturer. Always adhere to the following precautions:

• Comply with the rated maximum voltage and current, and the measurement category. Do not use the current probe on networks where the voltage or category exceeds those specified.

• Comply with the conditions of use (e.g. temperature, humidity, altitude, degree of pollution, location).

• Do not use the current probe if its housing is open, deteriorated, or incorrectly reassembled. Before each use, check the integrity of the insulation of the unit, jaws, clamps, housing, and leads.

• Do not subject the current probe to water or other liquids.

• Keep the jaw contacts of the clamp absolutely clean.

• Use suitable personal protective equipment when hazardous voltages may be accessible in the installation where the measurement is made.

• Any repairs must be carried out by accredited skilled personnel.

CAT IV: Measurement category IV corresponds to measurements taken at the source of low-voltage installations. Example: power feeders, counters and protection devices.

CAT III: Measurement category III corresponds to measurements on building installations. Example: distribution panel, circuit-breakers, machines or fixed industrial devices.

CAT II: Measurement category II corresponds to measurements taken on circuits directly connected to low-voltage installations. Example: power supply to domestic electrical appliances and portable tools.

The AEMC INSTRUMENTS MN93-BK has the following features:

1. Jaws

2. Protective guard

3. Two-position range switch (MN193 only)

4. Jaw opening lever

5. Shielded lead

6. Custom 4-pin input connector

Note: The two-position range switch is only on the MN193 model, not the MN93-BK.

The current probes and flexible sensors are used to measure the current flowing in a conductor or bus bar without opening the circuit. They also insulate the user from dangerous voltages in the circuit.

1. The choice of current probe to be used depends on the amperage to be measured and the diameter of the cables or size of the bus bar.

2. For three-phase measurements, use the color-coded ID markers to associate a color for each current input to match the phase identifiers on the measured system.

3. Connect the current probe or sensor to the current terminals of the instrument.

IMPORTANT NOTE: Always connect the probes or sensors with the indicating arrows pointing toward the load.

NOTE: For details of the measurement configuration and technical specifications, refer to the user manual of the instrument the current probe is being used with.

Follow these steps to clamp the probe:

• Press the jaw opening lever on the probe to open the jaws.

• Clamp the probe around the conductor to be tested. For best results, center the conductor in the jaws of the clamp.

NOTE: The measurement ranges specified are for the probes. In some cases, they may differ from the ranges that can be measured by the instrument with which they are used.

Environmental Specifications:

• Use: Indoor use.

• Operating Temperature: 14° to 131°F (-10° to 55°C); 10% to 85% RH

• Storage Temperature: -40° to 158°F (-40° to 70°C); 10% to 90% RH

• Degree of pollution: 2

• Altitude: < 2000 m

Mechanical Specifications:

• Protection index: IP 40 for the probes and IP 30 jaws open, according to IEC 60 529

• Drop test: According to IEC 61010-1

• Electrical safety: According to IEC 61010-2-032

• Maximum applicable voltage for MN93/MN193: 600V CAT III; 300V CAT IV

Specifications are subject to change without notice.

Before cleaning, disconnect the instrument from any source of electricity to avoid risk of electric shock.

• Use a soft cloth, dampened with soapy water. Rinse with a damp cloth and dry rapidly with a dry cloth.

• Do not use alcohol, solvents, or hydrocarbons.

• Do not splash water directly on the instrument.