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OPERATION INSTRUCTION
Inaccurate
measurement may result from the following:
• When the battery runs out: at this time, the "
will continuously appear on LCD to remind you
to replace the battery.
• When the measured distance is out of the
specified range: the effective range is
(0.5~16m) 2' ~ 53'
• 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 addition of different parameters (e.g. length plus area), the "+" will be
ignored. The screen will keep the same read 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 of homogeneity.
• When the measuring environment is not good: the temperature and humidity
will affect the accuracy of measurement, and take measurement under
environment of no wind, especially for long distance measuring (between l2 m
to 16m / 40' to 53' ), the relative humidity should be above 48%, and the
surface area of the target object is at least 3m x 3m. /lOft x lOft.
• When measuring, ultrasonic sensor aperture should straightly
face to the measured surface.
• Handle with care and do not drop tool.
• To avoid failure do not disassemble the tool.
• Keep the tool dry and clean.
• Store the tool in the case when not in use.
• Avoid dust and water, which may stain the lens.
• Check battery regularly in case of deterioration.
• Remove the battery when not in use for an extended period of time.
Cautions
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