AEMC INSTRUMENTS J93 (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 J93 has the following features:

1. Jaws

2. 4-point CA connector

3. Safety guard

4. Zero adjustment knob

5. Power ON/Low battery indicator

6. Three-position switch: ON, OFF, battery test

The AEMC INSTRUMENTS J93 is used to measure the current flowing in a conductor or bus bar without opening the circuit. Follow these steps for operation:

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

2. Connect the current probe to the current terminals of the measuring instrument. IMPORTANT NOTE: Always connect the probes with the indicating arrows pointing toward the load.

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

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

5. Refer to the user manual of the instrument the current probe is being used with for details on measurement configuration.

To clean your AEMC INSTRUMENTS J93, follow these instructions:

■ 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.

CAUTION: Risk of electric shock. Disconnect the instrument from any source of electricity before cleaning.

Follow these steps to replace the battery in the AEMC INSTRUMENTS J93:

■ Insert a tool, not more than 3mm in diameter, in the hole in the battery compartment cover.

■ Push to unlock the battery compartment cover, then slide it off.

■ Remove it completely by hand.

■ Remove the battery and the shim from the compartment.

■ Place the new battery in the compartment with the polarity as indicated on the label. Then replace the shim.

■ Put the battery compartment cover back in the slide and push it in until you hear a click.

Used batteries must not be treated as ordinary household waste. Recycle them appropriately.

The electrical specifications for the AEMC INSTRUMENTS J93 are as follows:

Battery: 9V Alkaline NEDA 1604A, 6LR61

Battery Life: 70H typical (NOTE: Battery life is twice the typical value when using Lithium batteries)

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

■ IK Code: IK 04 according to IEC 50102

■ Drop test: According to IEC 61010-1

■ Electrical safety: According to IEC 61010-2-032.

■ Maximum applicable voltage: 600V CAT III; 300V CAT IV

Specifications are subject to change without notice.