- Disconnect the power supply and discharge the filter capacitors in the power
supply before measuring resistance or testing diodes.
- Never connect the test leads of the device to a voltage source, if the rotary
switch is set to measure current, resistance or test diodes. This can damage
the device.
- If the battery symbol appears in the display, replace the battery immediately.
- Always switch off the appliance before opening the device to exchange the
battery or the fuse.
- Never use the device with the rear cover removed or with the battery and
fuse compartment open!
- Do not use the device near strong magnetic fields (for e.g. welding
transformer), as this can distort the display.
- Do not use the device outdoors, in humid surroundings or in environments
that are subjected to extreme temperature fluctuations.
- Do not store the device in places which are exposed to direct sunlight.
- Remove the battery if the device is not used for a long time.
- If changes or modifications are made to the device, the operational safety is
no longer guaranteed and the warranty becomes void.
- Before each measurement, check the function on a reliably functioning
voltage source.
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