German Light Products Impression GT-1 Users Manual
Instruction Manual
From Software Version .87
User Manual
GT-1 Instruction Manual
Revision 0.6, Applies from firmware version .87
July, 2017
© 2017 German Light Products GmbH (GLP), Industriestr. 2, 76307 Karlsbad, Germany
The GT-1 and this instruction manual are intended for use by experienced professionals
with the knowledge and skills to set up, operate, and maintain high-powered,
remotely controlled lighting equipment safely and efficiently.
Save this manual for future reference. Replacement copies and updates are
available for download in electronic format from www.glp.de.
The information in this manual is subject to change without notice.
German Light Products GmbH
Table of Contents
1 Safety Precautions ...................................................................................................... 4
1.1 DANGER! Prevent Hazards that Will Result in Serious Injury or Death .............. 4
1.2 WARNING! Prevent Hazards that Could Result in Serious Injury or Death ....... 4
1.3 CAUTION! Prevent Hazards that Could Result in Moderate Injury ................... 4
1.4 NOTICE! Prevent Damage to Product or other Property .................................. 5
2 Overview of Features .................................................................................................. 6
2.1 Intended Use ............................................................................................................ 6
2.2 Lamp ......................................................................................................................... 6
2.3 Pan and Tilt ............................................................................................................... 6
2.4 Color .......................................................................................................................... 6
2.5 Gobos ....................................................................................................................... 7
2.6 Dimming and Shutter Effects ................................................................................. 8
2.7 Focus and Zoom ...................................................................................................... 8
2.8 Animation Wheel ..................................................................................................... 8
2.9 Prisms and Frost ........................................................................................................ 9
2.10 Changing Effect Settings by DMX ........................................................................ 9
2.11 Display ....................................................................................................................... 9
2.12 Base and rigging options ....................................................................................... 9
3 Preparation for Use .................................................................................................... 10
3.1 Included Items .......................................................................................................10
3.2 Safe Handling ........................................................................................................10
3.3 Mounting ................................................................................................................11
3.4 Securing the Fixture ...............................................................................................13
3.5 Connections ...........................................................................................................14
3.6 Start/stop operation..............................................................................................14
3.7 Transportation and Storage .................................................................................14
4 The Menu Field ........................................................................................................... 15
5 DMX Channels ........................................................................................................... 18
5.1 Normal Mode (23 DMX Channels) ......................................................................18
6 Optional Accessories ................................................................................................ 20
7 Cleaning and Maintenance ..................................................................................... 21
7.1 Suggested Maintenance Intervals .....................................................................21
7.2 Cleaning .................................................................................................................21
7.3 Lubrication .............................................................................................................21
7.4 Head Maintenance ..............................................................................................22
7.5 GLP Service and Support .....................................................................................27
8 Technical Specifications ........................................................................................... 28
9 Dimensions ................................................................................................................. 30
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1 Safety Precautions
The GT-1 and this instruction manual are intended for use by experienced
professionals with the knowledge and skills to set up, operate, and maintain highpowered, remotely controlled lighting equipment safely and efficiently. These
operations require expertise that is not provided in this manual.
Read this manual and familiarize yourself with the safety precautions before installing
or using the product. The manufacturer will take no responsibility for damages or
harm caused by disregard for the information in this manual.
Should you have questions about the safe operation of the GT-1, please contact
an authorized GLP distributor, a list of which can be found at www.glp.de.
1.1 DANGER! Prevent Hazards that Will Result in Serious Injury or Death
Avoid direct exposure to a hot or operating lamp. Discharge lamps operate at high
internal pressure and can explode without warning. The extremely hot shards of
broken glass from an unshielded lamp will cause serious injury. Looking directly at an
unshielded lamp can cause serious eye damage. Direct exposure to UV radiation
can cause skin burns. Operate the lamp only with all covers in place. Turn off the
lamp and allow to cool for at least 60 minutes before removing any head cover.
Wear safety goggles whenever the lamp is exposed.
1.2 WARNING! Prevent Hazards that Could Result in Serious Injury or Death
Do not look directly into the beam of light: brief exposure can cause eye injury. Avoid
exposing your eyes to direct radiation! Do not view the light output with optical
instruments or any device that may concentrate the beam. Risk Group 2 product
according to EN 62471.
Do not illuminate surfaces within 16 M (52.5 ft.) of the fixture. When concentrated in
a narrow beam, the light output is powerful enough to cause burns or fire in
illuminated objects at near range.
Installation shall be performed by qualified personnel only in accordance with local
regulations. To prevent falls, suspend the GT-1 with hardware specifically designed
and rated for the purpose and a form of backup attachment such as a safety cable.
Hot surfaces! Avoid touching lights during the operation. This can cause injuries
and/or damage. Avoid placing lighting fixtures in locations where there is risk of
accidental contact. Allow fixtures to cool before handling.
Connect the fixture only to a grounded (earthed) power supply with overload
protection for protection against electric shock. Verify that power cables and
connectors are in good condition. Replace a blown fuse with one of the specified
rating only.
1.3 CAUTION! Prevent Hazards that Could Result in Moderate Injury
Avoid using strobe effects for extended periods. Flashing light, particularly between
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5 and 30 flashes per second, may cause seizures in persons with photosensitive
epilepsy. Check local regulations on use of strobe lighting and notify the public in
advance when strobe effects are used. If a seizure occurs, stop using strobe effects.
Help the person sit in a safe place or lay them on their side with their head supported
to prevent it from hitting the floor. Do not use force. Seek emergency medical help if
the seizure lasts for more than a few minutes.
Do not operate a fixture with damaged, cracked, or missing pieces. All optical
components and covers must be in good condition to prevent injury from UV
radiation.
The lamp contains mercury. Do not attempt to clean or repair damage from a
broken lamp. Special safety precautions must be taken. Refer the fixture to an
authorized service facility.
The fixture is heavy. When handling, use a two-person lift to prevent injury.
1.4 NOTICE! Prevent Damage to Product or other Property
Avoid pointing the front of the fixture towards direct sunlight
or other strong light sources. The front lens focuses and
concentrates light just like a magnifying glass. Direct
sunlight and other bright light sources can cause internal
damage to the fixture, melting components or starting an
internal fire within seconds.
Damage can occur whether the fixture is powered on or off. To avoid problems:
Never expose the front of a fixture to direct sunlight or any other strong light sources.
For outdoor applications during daylight, make sure that the front face of any fixture
is shielded or points away from the sun, even when not in use.
Avoid pointing other high-powered beam lights directly at the fixture.
Ensure that the moving head can rotate through its full range of motion before
powering up the fixture, and that fans and air vents are clean and unobstructed.
Do not pick up or carry the fixture by the front lens bezel. The LCD display is also
fragile. Picking up or supporting the fixture in these spots could result in damage
that is not be covered by the warranty.
Use only original spare parts. Any structural modification on the system will terminate
all warranty claims.
Do not exceed 1500 lamp hours. Risk of damage from lamp explosion increases as
the lamp approaches its specified usage life. For best performance, replace the
lamp after 1000 hours of operation.
Clean optical components only as directed. Oils, solvents, and other chemicals
commonly used for cleaning can damage the lens coatings and surfaces.
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2 Overview of Features
2.1 Intended Use
The GT-1 is for permanent or temporary indoor use in venues where the distance to
illuminated surfaces is at least 16 M (52.5 ft.). It may be used outdoors if it is protected
from moisture and precautions are taken to prevent damage from direct sunlight.
It may be placed upright on a level surface or suspended from a suitable structure
as described in Section 3.3.
It is not suitable for household use, wherever unattended children have access to
it, for permanent outdoor installation, or in areas where the distance from the fixture
to illuminated surfaces is less than specified.
The GT-1 shall be installed, operated, and maintained only by persons with the
training, knowledge and skills to do safely and efficiently.
2.2 Lamp
The GT-1’s OSRAM SIRIUS HRI 440W lamp is a compact reflector lamp with a very
short arc and high light output optimized to create sparkling effects. The lamp was
developed specifically for moving heads to perform in any position. It outputs
22,000 lumens at a color temperature of 7300K with a color rendering index of 80.
The lamp’s average rated life is 1500 hours. It should be replaced every 1000 hours
to minimize the risk of lamp explosion.
2.3 Pan and Tilt
The GT-1 pans through 640° and tilts through 262° with coarse and fine control
channels and self-correcting position feedback. Position feedback can be disabled
and control of pan and tilt can be reversed from the control panel or by DMX.
2.4 Color
The GT-1 provides CMY color mixing with progressively saturated cyan, magenta, and
yellow wheels. The Old CMY curve setting is for use on prototype fixtures that had
different wheels.
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A separate color wheel supplements the color mixing system with 11 color filters,
including four color correction filters and a light frost filter. The wheel rotates in fixed
color steps, scrolls continuously for split color effects, and rotates clockwise and
counterclockwise with variable speed.
2.5 Gobos
Figure 2-1: Color and fixed gobo wheels
Fixed Gobos
Gobo wheel 2 is an aluminum wheel with 19 patterns, including five iris gobos. The
wheel steps to fixed positions and rotates continuously clockwise and
counterclockwise with variable speed.
Rotating Gobos
Gobo wheel 1 provides eight user-replaceable rotating glass gobos that can be
rotated to indexed positions or continuously with coarse and fine control channels.
Custom gobos shall be 22.9 mm in diameter with a maximum image diameter of 13
mm. They may be manufactured in 0.8 mm 5052 aluminum or 1 mm litho/dichro
coated quartz. See page 23 for the gobo replacement procedure.
Figure 2-2: Stock rotating gobos
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2.6 Dimming and Shutter Effects
The GT-1 features a combined dimmer and shutter system that provides full range
dimming along with flashing pulse and strobe effects up to 10 flashes per second.
Two dimming curves are available: linear and extra soft. The mode can be selected
from the control panel or by DMX.
2.7 Focus and Zoom
The GT-1 has a 3-element optical train with motorized front lens, zoom lens, and
focus lens. The fixture’s two-stage zoom system narrows the focused beam from 56°
down to 3.5° by moving the zoom lens from front to back. It narrows the beam to
2.5° in Beam Mode by moving the front lens forward. The beam may be narrowed
further by inserting iris gobos.
When inserted, the frost filter and prisms are in the path of the zoom lens. When
either of these effects are applied, zoom is not continuous.
Zoom channel values from 82 to 177 are disabled when frost is applied.
Zoom channel values from 107 to 208 are disabled when a prism is inserted.
When taking zoom past these levels in either direction, the frost and prism effects are
automatically removed momentarily.
2.8 Animation Wheel
The GT-1’s animation wheel can be inserted gradually to positions that, when
combined with variable speed clockwise and counterclockwise rotation, give the
appearance of vertical, diagonal, or horizontal movement in two directions.
Figure 2-3: Animation wheel
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2.9 Prisms and Frost
The GT-1 provides three rotating prisms: a 3-facet, an 8-facet, and a 4-facet linear.
The prisms can be rotated to indexed positions or continuously at variable speed.
Inserting or removing a prism with zoom at a DMX level from 107-208 will cause a
small change in the zoom lens position.
The GT-1 has a split-flag variable frost filter that provides a wide angle wash effect.
Inserting or removing frost at zoom levels from 82-177 will cause a small change in
the zoom lens position.
2.10 Changing Effect Settings by DMX
The Control Channel (23 in Normal DMX Mode) provides the ability to change fixture
settings, turn the lamp on/off, and perform a fixture reset from the control desk. To
send a send a Control Channel command, start from level 0 and hold the
command for three seconds.
2.11 Display
The illuminated graphic LCD display with touch wheel control and self-charging
battery allows you to change fixture settings quickly and intuitively under any
conditions, even when the power is off. See Chapter 4 for settings, readouts, and
related information.
2.12 Base and rigging options
The base provides Camlock attachment points for easy fastening of the included
floor stand, omega clamp attachment brackets, and other rigging accessories. It
also provides 2 M10 threaded sockets for direct fastening of half-coupler clamps.
Two countersunk bolts are provided for clamp attachment.
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Installation shall be performed by qualified personnel only, in accordance
with applicable regulations such as BGV C1 and DIN VDE 0711-217.
3 Preparation for Use
3.1 Included Items
The GT-1 package includes a floor stand, a power cord with PowerCON connector,
and two M10 x 25 countersunk bolts for fastening half-couplers.
3.2 Safe Handling
Caution! Heavy object. Two person lift required.
Cardboard packaging
To remove a GT-1 from cardboard packaging, open the top of the box and remove
the floor stand and upper piece of foam packing material. Use the cutouts in the
lower piece of foam located by the yoke and base to place hands under fixture. Lift
fixture straight up, out of box, and lower gently onto workspace.
Flight case
To remove a GT-1 from a flight case, mount two omega brackets with handles to the
base. The brackets mount with two Camlock quarter-turn pins. Line up and insert the
pins into the base and turn 90° clockwise to lock. Lift the fixture straight up, out of the
flight case, and lower gently onto workspace.
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