Trimble GL4XX User Manual

TABLE OF CONTENTS

FOR YOUR SAFETY 5
COMPONENTS 6
How to Use the Laser System 6
Powering the Laser 6
Laser Setup 7
Turning On/Off the Laser 7
Turning On/Off the Radio Remote Control 8
Matching the Remote Control with the Transmitter 8
Activating/Deactivating Standby Mode 8
Using the Manual Mode 8
Mask Mode 9
Y(⬔)- or X(y)-Axis Slope Mode 9
APPLICATIONS 10
General Construction 10
Determining the Height of Instrument (HI) 10
Using the Slope Mode 10
Establishing Vertical Alignment 11
CALIBRATION 11
Checking Calibration of the Y- and X-Axes 11
Checking Calibration of the Z-(vertical) Axis 11
PROTECTING THE UNIT 11
CLEANING AND MAINTENANCE 12
PROTECTING THE ENVIRONMENT 12
WARRANTY 12
TECHNICAL DATA 12

Introduction

Thank you for choosing one of the Spectra Precision Lasers from the Trimble family of precision grade
lasers.
The grade laser is an easy-to-use tool that offers accurate horizontal, vertical and sloped laser reference up
to 1300 ft (400 m) away using a receiver.

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FOR YOUR SAFETY

For hazardless and safe operation, read all the user guide instructions.

• Use of this product by people other than those trained on this product may result in exposure to hazardous
laser light.

• Do not remove warning labels from the unit.

• The GL422 is Class 3A/3R (< 5mW, 600 ... 680 nm). The GL412 laser is subject to Class 2
(< 3.4 mW, 600 ... 680 nm).

• Never look into the laser beam or direct it to the eyes of other people.

• Always operate the unit in a way that prevents the beam from getting into people‘s eyes.

If initial service is required, which results in the removal of the outer protective cover, removal must only be
performed by factory-trained personnel.

Caution: Use of other than the described user and calibration tools or other procedures may result
in exposure to hazardous laser light.

Caution: Unsafe operation may result if the product is used differently than described in this
operator‘s manual.

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COMPONENTS

1 Power Button
2 Battery LED
3 Manual/Standby Button
4 Leveling LED
5 Manual/HI-Warning LED
6 Up and Down Arrow Buttons
7 Left and Right arrow Buttons
8 Liquid Crystal Display (LCD)
9 Rotor
10 Sunshade
11 Sighting Guides
12 Axes-Alignment-Marks
13 Recharge Jack
14 Handle
15 Battery door
16 5/8x 11 Tripod Mounts
17 Rubber feet

How to Use the Laser System

Powering the Laser

Batteries

Installing Batteries

Remove the battery door by turning the center knob 90° counterclockwise.
Insert batteries (or a rechargeable battery pack) into the housing so that the negative poles are on the bigger
battery spiral springs.
Install the battery door and tighten it by turning the center screw 90° clockwise.

Recharging the Batteries

The laser is shipped with rechargeable NI-MH batteries.

The LED will flash when battery voltage is between 3.8 and 4.0 volts.
The LED will be on continuously when battery voltage is less than 3.8 volts.

The charger requires approx. 10 hours to charge empty rechargeable batteries.
For charging, connect the plug of the charger to the recharge jack of the unit.
New or long-time out-of-use rechargeable batteries reach their best performance after being charged and
recharged five times.

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WARNING

Ni-MH batteries may contain small amounts of harmful substances.
Be sure to charge the battery before using it for the first time, and after not using it for an extended
length of time.
Charge only with specified chargers according to device manufacturer‘s instructions.
Do not open the battery, dispose of in fire or short circuit; it may ignite, explode, leak or get hot
causing personal injury.
Dispose in accordance with all applicable federal, state, and local regulations.
Keep the battery away from children. If swallowed, do not induce vomiting. Seek medical attention
immediately.

A mechanical switch prevents alkaline batteries from being charged. Only the original
rechargeable battery pack allows charging within the unit. Any other rechargeable batteries
have to be charged externally.

Note: The battery LED shows the approximate charge of the batteries.

The batteries should only be charged when the laser is between 50° F and 104° F (10° C to 40° C).
Charging at a higher temperature may damage the batteries. Charging at a lower temperature
may increase the charge time and decrease the charge capacity, resulting in loss of
performance and shortened life expectancy.

Laser Setup

Position the laser horizontally (tripod mount and rubber feet downward!) on a stable platform, wall mount
or tripod at the desired elevation.
The laser recognizes automatically whether it is used horizontally or vertically when switched on.

Turning On/Off the Laser

Press the power button to turn on the laser.

GL422 – Display GL412 – Display

The LEDs (2, 4 and 5) are turned on for 2 seconds. At the LCD, the last used grade values, the mask mode
status and the antenna symbol will be displayed.

Note: The laser always powers up in the automatic self-leveling mode with 600 rpm and the last­entered grade.

The laser is level when the leveling indicator 4 is no longer flashing (once every second) and the grade values
at the laser’s and remote control’s LCD are not flashing.
For the first five minutes after the laser self levels, the LED 4 lights solid then flashes every four seconds
to let you know the laser is still level.
Repeatedly pressing and releasing the up and right arrow buttons simultaneously toggles the rotation speed
between 300 and 600 rpm.

Note: If the temperature changes after the laser has been turned on by more than 5 degrees C (10
degrees F) the laser will compensate for the temperature change by resetting the leveling system.
During a temperature compensation reset, the grade display flashes, rotation stops and the laser
beam turns off. When the temperature compensation reset has been finished, a new grade value
can be dialed into the unit.

Note: When the laser is set up vertically and turned on, the rotor centers in its line range automatically.
The LCD indicates line can be adjusted by using the up/down (⬔) buttons.

If the laser is positioned beyond its self-leveling range of ±9%, the manual and leveling indicators flash
simultaneously and a warning sound is emitted. Turn the unit off, reposition the laser within the self-leveling
range and turn it on again.

Note: If the laser is out of its self-leveling range and remains out of it for more than 10 minutes, it
shuts down completely.

HI alert:

After the laser has been level for more than 5 minutes, the HI (height of instrument) alert activates. If the laser
is disturbed (tripod bumped, etc.) so that when it re-levels the laser beam elevation changes by more than
3 mm (1/8 in.), the HI alert shuts down the laser and rotor, a warning sound occurs and the red LED flashes
two times per second (twice the manual-mode rate). In a HI condition, a HI and flashing dashed lines appear
at the laser’s and remote control’s LCD. To restore level, turn the laser off and on.
After the laser has re-leveled, check your initial reference elevation.

Note: The HI-alert condition can also be deleted by activating/deactivating the Standby mode with
the remote control.

In order to switch the laser off, press the power button again.

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