ELENCO M-1740 (01) PDF MANUAL

1. Do not use the meter if the meter or test leads look damaged, or if you suspect that the meter is not operating properly.

2. This meter is not recommended for high voltage industrial use; for example, not for measurements of 440VAC or 600VAC industrial power mains. The unit is intended for use with low energy circuits to 600V AC/DC or high energy circuits to 250VAC or DC. Accidental misuse by connection across a high voltage, high energy power source when the meter is set up for mA measurement may be very hazardous.

3. Turn off power to the circuit under test before cutting, unsoldering, or breaking the circuit. Small amounts of current can be dangerous.

4. Use caution when working above 60VDC or 30VAC rms. Such voltages pose a shock hazard.

5. When using the probes, keep your fingers behind the finger guards on the probes.

6. Measuring voltage which exceeds the limits of the multimeter may damage the meter and expose the operator to a shock hazard. Always recognize the meter voltage limits as stated on the front of the meter.

7. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

1. Connect the red test lead to the “VΩA” jack and the black test lead to the “COM” jack.

2. Set the Function/Range switch to the desired current range and slide the “AC/DC” selector switch to the desired voltage type. If magnitude of voltage is not known, set switch to the highest range and reduce until a satisfactory reading is obtained.

3. Connect the test leads to the device or circuit being measured.

4. For DC, a (-) sign is displayed for negative polarity; positive polarity is implied.

1. Set the Function/Range switch to the desired current range and slide the “AC/DC” selector switch to the desired current type.

2. For current measurements less than 200mA, connect the red test lead to the “VΩA” jack and the black test lead to the COM jack.

3. For current measurements over 200mA or greater, connect the red test lead to the 10A jack and the black test lead to the COM jack.

4. Remove power from the circuit under test and open the normal circuit path where the measurement is to be taken. Connect the meter in series with the circuit.

5. Do not continually measure 10A as the shunt wire will heat up. Allow 60 seconds max. At 5A or less, continuous use is OK.

1. Set the Function/Range switch to the desired resistance range or continuity position.

2. Remove power from the equipment under test.

3. Connect the red test lead to the “VΩA” jack and the black test lead to the “COM” jack.

4. Touch the probes to the test points. In ohms, the value indicated in the display is the measured value of resistance. In continuity test, the beeper sounds continuously, if the resistance is less than 40Ω +/-2Ω.

The accuracy of the functions might be slightly affected when exposed to a radiated electromagnetic field environment, e.g. radio, telephone or similar.

1. Connect the red test lead to the “VΩA” jack and the black test lead to the “COM” jack.

2. Set the Function/Range switch to the “diode test” position.

3. Turn off power to the circuit under test.

4. Touch probes to the diode. A forward-voltage drop is about 0.6V (typical for a silicon diode).

5. Reverse probes. If the diode is good, “OL” is displayed. If the diode is shorted, “.000” or another number is displayed.

6. If the diode is open, “OL” is displayed in both directions.

7. If the junction is measured in a circuit and a low reading is obtained with both lead connections, the junction may be shunted by a resistance of less than 1kΩ. In this case, the diode must be disconnected from the circuit for accurate testing.

1. Set the Function/Range switch to the desired hFE range (PNP or NPN type transistor).

2. Never apply an external voltage to the hFE Socket. Damage to the meter may result.

3. Plug the transistor directly into the hFE socket. The sockets are labeled E, B, and C for emitter, base and collector.

4. Read the transistor hFE (DC gain) directly from the display.

1. Set the Function/Range switch to the Hz position.

2. Connect the red test lead to the “VΩA” jack and the black test lead to the “COM” jack.

3. Connect the test leads to the point of measurement and read the frequency from the display.

1. Set the Function/Range switch to the desired F (capacitance) range.

2. Never apply an external voltage to the Cx sockets. Damage to the meter may result.

3. Insert the capacitor leads directly into the Cx socket.

4. Read the capacitance directly from the display.

Remove test leads before changing battery or performing any servicing.

Power is supplied by a 9 volt “transistor” battery (NEDA 1604, IEC 6F22). The “battery symbol” appears on the LCD display when replacement is needed. To replace the battery, remove the two screws from the back of the meter and lift off the front case. Remove the battery from battery contacts.

If no current measurements are possible, check for a blown overload protection fuse. There are two fuses; F1 for the “VΩA” jack and F2 for the 10A jack. For access to fuses, remove the two screws from the back of the meter and lift off the front case. Replace F1 only with the original type 0.8A/250V, fast acting fuse. Replace F2 only with the original type 10A/600V, fast acting ceramic fuse.

Periodically wipe the case with a damp cloth and detergent, do not use abrasives or solvents.