Operation - David White 3900HV Owner's Manual

!
WARNING
extreme temperatures or variations in
temperature. As an example, do not
leave it in vehicles for long time. In
case of large variations in
temperature, allow the instrument to
adjust to the ambient temperature
before putting it into operation. In
case of extreme temperatures or
variations in temperature, the
accuracy of the instrument can be
impaired.
Avoid heavy impact to or falling
down of the instrument. After severe
exterior effects to the instrument,
it is recommended to carry out an
accuracy check each time before
continuing to work.
Setting Up the Instrument
Position the instrument on a firm
surface in the horizontal or vertical
position, mount it to a tripod or to the
trivet mount 8 with alignment unit.
The instrument reacts sensitively
to ground vibrations and position
changes. Therefore, pay attention
that the position of the instrument is
stable in order to avoid operational
interruptions due to re-leveling.

OPERATION

Do not subject the
instrument to
Switching On and Off
Press the Power ON/OFF 3a keypad
and allow the laser instrument to
self-level. If the power indicator LED
blinks, the voltage of the batteries
is low and batteries need to be
replaced or recharged.
The laser instrument can stand
alone on a level, sturdy surface
or preferably secured to a 5/8-11
tripod.
When the instrument is powered ON
it will automatically self-level. After
self-leveling, the laser instrument will
begin operating in Rotation Mode at
the speed of 600 RPM.
If the instrument is placed improperly,
or the slope of instrument exceeds
the range of +/-5°, the Power
indicator LED and the laser beam will
blink at the same time.
The instrument will shut down
automatically if the unit exceeds the
self-leveling system range for more
then 5 minutes.
-10-