Cleaning:
Periodically wipe the case with a damp cloth. Do not use abrasives or
solvents.
General Maintenance:
Except replacing battery and fuse, never attempt to repair or service
the instrument.
Store the instrument in a dry place when not in use. Do not store it in
an environment with intense electromagnetic field.
If the instrument fails, check and replace ( as needed ) the batteries
and fuse and/or review this manual to verify proper operation.
Replacing the battery in the transmitter:
When the battery level indicator on the transmitter display becomes
" " or when the receiver display shows " ", the battery in
the transmitter is not high enough and you must replace it immediately;
otherwise the transmitter will not operate normally or the
measurement/detection result may be wrong.