RGK PR-81 User manual

PR-81
User Manual
Laser Level

3
Caution
The RGK PR-81 laser plane builder uses a potentially
dangerous laser source. Do not direct the laser beam into your
eyes, as this may result in injury.
With prolonged contact with the eyes, the laser can damage
eyesight, even from a long distance. Do not direct the laser beam
at people or animals.
Observe the rules of care and operation, do not disassemble,
repair, or modify the device yourself - this may lead to the device
failure.
Batteries can leak and damage the instrument. Observe the
following rules:
• Observe the polarity.
• Do not short-circuit the battery compartment.
• Do not recharge conventional batteries.
• Do not mix old and new batteries, or batteries from different
manufacturers.
• Do not leave batteries inside the device if it is not used for a
long time.
• Do not give batteries to children and animals.
• Donotdisposeofbatteriesinre.
• Do not dispose of batteries with household waste. Dispose of
them according to local regulations.
Laser level RGK PR-81 projects visible laser planes. This allows
to perform various tasks in construction and repair, including leveling,
construction of vertical and horizontal planes. The device can be
used both indoors and outdoors. The presence of a pulse mode of
operation of the device allows the detector to be used to increase the
operating range even in conditions of low visibility of the laser beam
(bright sun, etc.).

4
Device composition
1. Laser emitter windows
2. Control panel
3. Pendulum lock switch
4. 1/4” tripod socket
5. 5/8” tripod socket
6. Battery compartment cover
Getting started
Before starting work, place the level on a work surface or
fasten it to a tripod, pole, or wall mount. The device can operate
in two main modes:

5
1. Pendulum lock: switch on the left
This line laser is a precision instrument that must be handled
with care. When not in use, the pendulum must always be in
position .
Locking the pendulum allows the instrument to better
withstand vibration and prevent possible damage during transport
or as a result of a fall.
2. Automatic alignment: switch on the right
When the pendulum is unlocked , the instrument can be
leveled automatically. The tilt of the instrument body must not
exceed 4° for the auto-leveling function to work.
Control panel functions
Laser selection
Pressing the line selection button allows you to select
different options for the relative position of the lines in the
sequence below:
• when the device is switched on, all the beams light up;
• a single press only turns on the horizontal plane;
• pressing twice only turns on the vertical plane;
• pressing the device three times returns it to its original
position.

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Control panel
Additional functions
Compensator lock
With the instrument pendulum locked (switch on the left side),
press and hold the line select button for 3 seconds to activate the
compensator lock mode. The device emits laser beams in this
mode, but the accuracy is not adjusted, because the pendulum
is locked. This operating mode of the device is used to draw lines
and planes with arbitrary angles of inclination.
Battery indicatorPulse indicator
Pulse mode button Line selection button

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Compensator Lockout Mode Activated Signal: The laser
beam will ash every 5 seconds to remind you that the laser
auto-align is off.
Signaling
Horizontal deviation signal
If the pendulum is not locked and the angle of inclination
of the level does not exceed 4°, the instrument is in automatic
leveling mode. In this case, the LED indicators are off. If the base
of the instrument is tilted more than 4°, the laser beam will blink.
Low battery alarm
TheredlowbatteryindicatorLEDturnsonandstartsashing
slowly if the operating voltage drops below 4.4V. In such a
situation, replace the batteries.
Checking the Accuracy of the Laser Level
Plane tilt
1. Install the device in the center of a room about 5 meters long.
2. Switch on the device.
3. Mark a point at the center of the laser cross.
4. Turn the instrument 180°.
5. Mark the second point.
6. Place the appliance at a distance of 0.5 m from the wall and
reapply the marks.
If the differences a1-a2 and b1-b2 do not exceed the accuracy
ofthedevicespeciedinitscharacteristics,theaccuracyofthe
device is within acceptable limits.

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Plane curve
1. Install the appliance at a distance of about 5 m from the wall.
2. Mark a point at the center of the laser cross.
3. Turn the instrument so that the point is shifted about 2.5 m
to the side and make sure that the deviation of the horizontal
linefromthemarkdoesnotexceedtheaccuracyspeciedin
thespecicationsoftheinstrument.
Vertical check
A plumb line is used to check the vertical of the device. Set
up the level about 1.5 m from the plumb line.
1. Unlock the compensator, turn on the vertical laser head, align
the axis of the vertical laser line with the lower point of the
plumb line.
2. Make sure that the deviation of the vertical line axis from
the gimbal does not exceed 0.2 mm per 1 m of the gimbal
length (example: for a plumb line with a length of 2.5 m, the
deviation should not be more than 0.5 mm
Iftheaccuracyofthedevicedoesnotcorrespondtothespecied
inthespecications,contacttheservicecenter.ыз.

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Specications
Accuracy ±0,2 mm/1 m
Auto-leveling ±4°
Operating range without receiver 20 m
Range of operation with the receiver 80 m
Tripod thread 1/4”, 5/8”
Laser type 635 nm, class II
Usage temperature range -10 °C to 50 °C
Dimensions 119 × 62 × 115 mm
Power supply 4 AA batteries x 1.5V
Continuous operation time on one set
of batteries (all lasers on) about 10 hours
Dust and moisture protection IP54
Device advantages
• Because of the pulse mode, the device can work both indoors
and outdoors.
• The horizontal plane extends over the entire area of the room
by 360°.
• The vertical plane reaches the ceiling.
• No need to disassemble the instrument for calibration.
• A built-in locking system allows the expansion joint to be
disabled during transport to avoid damaging vibration.
• The ribbed surface of the device body allows you to hold it
securely in your hands.
• Two 1/4" and 5/8" threaded sockets on the underside of the
housingallowtheleveltobemountedonxingdevicesof
different designs.

10
Caring for the device
Your level is a precision measuring instrument, handle it with
care. After each use, clean the level of dust with a soft cloth,
dampening it with water if necessary. Always wipe the appliance
dry. Do not store the device in wet or humid conditions. When
transporting, block the compensator by setting the switch to
position . This will prevent damage to the mechanism and
failure of the device.
Possible causes of incorrect measurement results
• Taking measurements through glass or plastic windows;
• Dirty laser window;
• Mechanical impact on the device. Check the accuracy of the
instrument if it has been knocked or dropped;
• Signicant uctuations in ambient temperatures. If it is
necessary to use the instrument in a cold place after storage
in a warm place (or vice versa), please wait a few minutes
before taking measurements to allow the temperature to
equalize.
Electromagnetic compatibility (EMC)
There is a possibility of:
• interference with other technical devices (e.g., navigation
equipment) by this device;
• interference with the operation of this device by other technical
devices (for example, strong radiation of electromagnetic
waves near industrial plants or radio transmitters).

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