Trebs DIY Mode D'emploi page 45

Inaccurate measurement may result from the following:

When the battery runs out: at this time, the "
LCD screen to remind you to replace the battery.

When the measured distance is out of the specified range: the effective range is 2'~53'
(0.6~16m).

When the calculated result is out of the specified range: at this time, an error message
"Err" will be displayed on the lower line of the screen.

When adding different parameters (e.g. length plus area), the "+" will be ignored and the
screen will show the same result as the unit was operated before.

When another ultrasonic source or high frequency noise is nearby: leave or shut down
the noise resource when taking measurement.

When barriers appear between the tool and the measured surface.

When the measured surface is not smooth: the measured surface should be smooth,
hard and homogeneous.

When the measuring environment is not good: the temperature and humidity will affect
the accuracy of measurement: Please take measurements under the circumstance of no
wind, and also the temperature of the unit should be the same as the temperature of
the environment, especially for long distance measuring (between 40' to 53'/ 12m to
16m). Besides, the relative humidity should be above 48%, and the size of the measured
surface should be at least 10ft. by 10ft./3m by 3m.

When measuring, the ultrasonic sensor aperture should face towards the measured
surface straightly.

Handle with care and do not let the tool drop down.

Do not disassemble the tool to avoid failure.

Keep the tool dry and clean.

Store the tool case when not in use.

Avoid dust and water, which may stain the lens.

Check the battery regularly in case of its deterioration.

Remove the battery when not in use for an extended period of time.
" icon will continuously appear on the
Cautions
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