EXTECH EX380363 [6/10] Maintenance

Model 380363-EU-EN-V-3.1-1/12

Using the LOCK Function to measure resistance

The Lock function can be used to make several resistance measurements in succession without the

need to push and hold the TEST key for each measurement.

1. Press the LOCK key to enter the LOCK mode, and then press the TEST key.

2. Zero out the test lead resistance.

3. Connect the probes to the test locations in succession.

4. Press the LOCK key to disable the lock function.

Note: The meter cannot indicate if the circuit is live in this mode. Ensure that the circuit is de-energized

before connecting the test leads or the fuse may blow.

Auto Power Off

To conserve battery life, the meter will automatically turn off after 15 minutes of non-use. To turn the

meter back on, turn the rotary switch to OFF, then to the desired function.

Analog Bar Graph

The analog bar graph displays resistance on a logarithmic scale and voltage on a linear scale. The

value always tracks the main display.

Maintenance

Battery Replacement

When the low battery symbol appears (BT) on the LCD the six 1.5V ‘AA’ batteries must be replaced.

1. Turn the meter off and remove the test leads

2. Remove the four (4) Phillips head screws on the rear of the meter

3. Remove the meter’s rear cover

4. Replace the batteries observing polarity

5. Affix the rear cover and secure the rear screws

You, as the end user, are legally bound (Battery ordinance) to return all used batteries

and accumulators; disposal in the household garbage is prohibited!

You can hand over your used batteries / accumulators at collection points in your

community or wherever batteries / accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the

end of its lifecycle

Fuse Replacement

If the meter turns ON but does not measure correctly, check the internal fuse.

1. Turn the meter off and remove the test leads

2. Remove the four (4) Phillips head screws on the rear of the meter

3. Remove the meter’s rear cover

4. Check and replace the fuse if necessary (0.5A / 600V fast blow)

5. Affix the rear cover and secure the rear screws

Cleaning

Periodically wipe the case with a dry cloth. Do not use solvents or abrasives to clean this instrument.