AEMC INSTRUMENTS MR193-BK (01) PDF Document

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 protection assured by the current probe can be compromised if it is used in a way that is not recommended by the manufacturer.

• 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.

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. Save the damaged packing container to substantiate your claim.

1. Jaws

2. Protective guard

3. Jaw opening lever

4. Two-position range switch

5. Shielded lead

6. Zero adjustment

7. Custom 4-pin input connector

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.

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.

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

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

• For the MR193 probe: Set the switch to 1mV/A; the ON indicator will light up.

• Connect the probe to the instrument.

• Adjust the zero by turning the potentiometer with no conductor in the jaws of the clamp.

• When the measurement is finished, turn the probe switch to OFF.

• 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 and sensors. In some cases, they may differ from the ranges that can be measured by the instrument with which they are used.

Battery: 9V Alkaline NEDA 1604A, 6LR61

Battery Life: MR193 – 100H typical

NOTE: Battery life is twice the typical value when using Lithium batteries.

• 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

• 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 MR193: 600V CAT III; 300V CAT IV

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

• 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.

1. Disconnect the MR193 completely and turn the rotary switch to OFF.

2. Use a screwdriver to unscrew the screws and remove the battery compartment cover on the backside of the unit.

3. Withdraw the battery from its compartment.

4. Disconnect the old battery without pulling on the wires and replace with a new one, observing the polarity.

5. Put the battery into its compartment.

6. Put the cover back in place and screw the screws back in.