Operation Guide

The instrument`s backlight is power on/off
automatically. The instrument will open the
backlight for 15 seconds after you press any
keys of the instrument. And the instrument will
power off the backlight to save power after 15
seconds of no operation on the instrument.
To ensure the accuracy of the instrument, a
self-calibration function is provided. Calibration
method: In the power-off state, press and
hold and at the same time until the
screen shows and there are flashing
numbers at the bottom. At this time, you enter
the self-calibration mode. Then, the user can
press to adjust the value according to
the error of the instrument. The adjustment range
is -9~9mm.
For example: the actual distance is 3.780m
If the measured value of the instrument is 3.778m,
which is 2mm lower than the actual value, you
can enter the calibration mode, and press to
increase the calibration value by 2mm on the
existing basis.
Backlight On/off
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Self-calibration and sound settings