Diodes and Continuity Measurement (see figure 5)
Warning
To avoid damage to the meter or to the device under test,
disconnect circuit power and discharge all the high-voltage
capacitors before diodes.
Use the diode test to check diodes, transistors, and other
semiconductor devices. The diodes test sends a current
through the semiconductor junction, and then measures
the voltage drop across the junction. A good silicon junction
drops between 0.5V and 0.8V.
To test a diode out of a circuit, connect the meter as follows:
1. Insert the red test lead into the VΩmA terminal and the
black test lead into the COM terminal.
2. Set the knob to Diodes.
3. For forward voltage drop readings on any semiconductor
component, place the red test lead on the component’s anode
and place the black test lead on the component’s cathode.
4. The measured value shows on the display.
Note
1. In a circuit, a good diode still produces a forward voltage
reading of 0.5V to 0.8V; however, the reverse voltage drop
reading can vary depending on the resistance of other
pathways between the probe tips.
2. Connect the test leads to the proper terminals as outlined
above to avoid error display.
3. The LCD will display “1” indicating open-circuit for wrong
connection. The unit of diode is Volt (V), displaying the
positive-connection voltage-drop value.
4. When diode testing has been completed, disconnect the
connection between the testing leads and the circuit test.
General Service
1. Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasive materials or solvents.
2. Clean the terminals with a cotton swab with detergent, as dirt or moisture in the terminals can affect readings.
3. Turn the meter to OFF position when it is not in use and take out the battery when not using for a long time.
4. Do not store the meter in a place of humidity, high temperature, explosives, flammables, or strong magnetic field.
Replacing the Battery
Warning
To avoid false reading, which could lead to possible electric shock or personal injury, replace the battery as soon as the
battery indicator appears.
To replace the battery:
1. Disconnect the connection between the testing leads and the circuit under test, and remove the testing leads
away from the input terminals of the Meter.
2. Turn the meter to OFF position.
3. Remove the battery cover.
4. Remove the battery from the battery compartment.
5. Replace the battery with a new 9V battery (NEDA 1604 or 6F22 or 006P).
6. Reinstall the battery cover.
Maintenance
1. Disconnect the appliance before cleaning.
2. Use a soft cloth and mild detergent to clean the surface of the meter. To prevent accidental damage or corrosion to the
surface, do not use an abrasive solvent.
3. If you won’t be using this appliance for a period of time, store it in a dry and well ventilated place. Keep it out of reach of children.
Disposal
Environmental Protection
Waste electrical production should not be disposed of with household waste. Please recycle where facilities exist.
Check with your local authority or retailer for recycling advice.
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Figure 5
