QEO FR 77-MM User manual

USER MANUAL
www.geo-fennel.com
FR 77-MM & FR 77-MMTracking

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Dear customer,
Thank you for your confidence in us having purchased a geo-FENNEL instrument.
This manual will help you to operate the instrument appropriately.
Please read the manual carefully - particularly the safety instructions. A proper use only guarantees a
longtime and reliable operation.
geo-FENNEL
Precision by tradition.
1. Supplied with A
2. Features B
3. Power supply C
4. Operation D
5. Safety notes E
SUPPLIED WITH
A
· Laser receiver FR 77-MM
· 4 x AA alkaline batteries
· Clamp for levelling rod
· Special mount
· User manual

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3 accuracy settings ± 2 mm / ± 5 mm / ± 9 mm
mm-indication accuracy ± 1 mm
Working range with class 2 laser 150 m
Working range with class 3R laser 350 m
Length of the receiving window 125 mm
Length of the receiving area for mm-indication 100 mm
Offset range (0SET) / from reference point ± 20 mm
Measuring units mm, cm, in, in-fraction
Signal tones 3
LCD display front, rear
LED height indicators front, side, rear
Power supply / Operating times Alkaline / 110 h
Temperature range -10°C to +50°C
Display illumination yes
Magnets top, side
Bubble vials top, side
Dust / water protection IP 67
Dimensions 170 x 77 x 32 mm
Weight 0,5 kg
FEATURES
· For use with red beam rotating lasers
· Extra long receiving window
· mm-indication of height difference between the laser plane and the reference point
· The segments of the display increase / decrease proportianally
· The „0“ position can be changed (Offset)
· Display illumination (front and rear)
· Robust clamp
· Special mount for diverse connections, e. g. scaffolding

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BFEATURES
Loudspeaker
Clamp alignment
guide
Clamp thread
0-position
(reference point)
Rear LCD Display
Magnetic strip
Side LED indicators
Rear LED indicatiors
Battery compartment
cover
Magnetic
strip
LED indicators
Sound / illumination
ON/OFF button
Accuracy button
Bubble
vial
Bubble vial
Receiving window
0SET button (Offset)
Front LCD Display
Units
Power ON/OFF

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Sign +/-
0-position
(reference point)
Battery status indicator
Units of measure
Numerical indication
0SET symbol
Accuracy symbol
Illumination symbol
Sound symbol
ON/OFF button Power ON/OFF the receiver
Accuracy button Select accuracy setting
UNITS button Select units of measure
Sound/illumination button Sound and/or illumination ON/OFF
0SET button Set a relative ZERO position

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POWER SUPPLY
C
INSERT / REPLACE BATTERIES
Open the battery compartment cover on the rear of the receiver and insert 4 x AA alkaline batteries
Refer to the battery compartment diagram to ensure correct polarity. Close the battery compartment
cover.
Always remove the batteries if the receiver will not be used for a long period of time to avoid leakage.
BATTERY STATUS INDICATOR
The FR 77-MM front LCD display has four power status symbols.
The receiver will automatically power off when the batteries are empty.
AUTOMATIC POWER-OFF
If the receiver does not receive a laser beam or is not operated for 10 minutes it will automatically
power off.
100 % power 70 % power 30 % power Empty

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OPERATION D
POWER ON
Press the ON/OFF button once to power on the receiver.
The LCD display will initialise taking about 0.5 seconds when
all the display symbols are illuminated (see diagram, left).
The receiver is now ready for use (see diagram, right).
SELECT ACCURACY SETTING
Power on the unit and select the receiving accuracy fine, normal or coarse by pressing the „accuracy
button“. The default accuracy setting following Power is „Fine“.
SWITCH ON /OFF THE SOUND
Power on the receiver and press the button „Sound/illumination“ to select the sound and volume
required. The symbols in the LCD display show the status of the sound and volume.
coarse
± 9 mm
normal
± 5 mm
fine
± 1 mm
951
low
offhigh

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SWITCH ON/OFF THE DISPLAY ILLUMINATION
Power on the receiver and keep the button „Sound/illumination“ pressed until the illumination is on.
SELECT THE UNITS
Power on the receiver and press the „UNITS“ button sucessively until the required unit symbol appears
in the display.
Millimetre Centimetre Inch Inch (fraction)

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RECEIVE A LASER BEAM
Power on the receiver and make all required settings (i. e. accuracy fine, sound high).
Carefully move the receiver up and down to detect the laser beam.
PLEASE NOTE:
If the distance between the rotating laser and the receiver is less than 1 m erroneous measurements
may occur.
Indication 1
The laser beam is high
„arrow“ is illuminated.
Acoustic signal:
Slow beep.
->Move the receiver up.
Indication 2
The laser beam is low
„arrow“ is illuminated.
Acoustic signal:
Fast beep.
->Move the receiver down.
Indication 3
The LED „0-position“
bar is illuminated.
Acoustic signal:
Continuous beep.
-> On level.

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RELATIVE 0-POSITION (REFERENCE POINT)
Within the range of ± 20 mm of the standard reference point (0-position) a relative 0-position can be
set. Press the „0SET“ button when the laser beam hits the receiving window (the „0SET“ symbol will
flash on the display). This current position of the laser beam is now set as the relative 0-position on the
receiver. Press the „0SET“ button to return to the default mode.
MM INDICATION
If the reference level of the receiver is e. g. 18 mm below the laser beam this height difference will be
displayed by an exact numerical value (see the left diagram).
further examples
The laser beam is
exactly on-level.
The laser beam is
19 mm above the
reference point
(move the receiver
up).
The laser beam is
35 mm below the
reference point
(move the receiver
down).

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APPLICATION
Connect the clamp to the receiver for use with a laser pole, levelling staff or similar accessory.
For optimum accuracy always level the bubble vials on the receiver before taking measurements.
SPECIAL MOUNT
To increase the versatility and scope of the receiver a special mount is provided (see illustrations).

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SAFETY NOTES
E
CARE AND CLEANING
Handle measuring instruments with care. Clean with soft cloth only after any use. If necessary damp the cloth with
some water. If the instrument is wet clean and dry it carefully. Pack it up only if it is perfectly dry. Transport in original
container / case only.
SPECIFIC REASONS FOR ERRONEOUS MEASURING RESULTS
Measurements through glass or plastic windows; dirty laser emitting windows; after the instrument has been dropped
or hit. Please check the accuracy.
Large fluctuation of temperature: If the instrument will be used in cold areas after it has been stored in warm areas (or
the other way round) please wait some minutes before carrying out measurements.
ELECTROMAGNETIC ACCEPTABILITY (EMC)
It cannot be completely excluded that this instrument will disturb other instruments (e.g. navigation systems); will be
disturbed by other instruments (e.g. intensive electromagnetic radiation nearby industrial facilities or radio transmit-
ters).
CE-CONFORMITY
The instrument has the CE-mark according to EN 61000-6-3:2007, EN 61000-6-1:2007, IEC 60825-1:2008- 05.
SAFETY INSTRUCTIONS
· Follow up the instructions given in the user manual.
· Do not stare into the beam. The laser beam can lead to eye injury. A direct look into the beam (even from greater
distance) can cause damage to your eyes.
· Do not aim the laser beam at persons or animals.
· The laser plane should be set up above the eye level of persons.
· Use the instrument for measuring jobs only.
· Do not open the instrument housing. Repairs should be carried out by authorized workshops only. Please contact
your local dealer.
· Do not remove warning labels or safety instructions.
· Keep the instrument away from children.
· Do not use the instrument in explosive environment.
· The user manual must always be kept with the instrument.

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WARRANTY
This product is warranted by the manufacturer to the original purchaser to be free from defects in material and
workmanship under normal use for a period of two (2) years from the date of purchase. During the warranty period,
and upon proof of purchase, the product will be repaired or replaced (with the same or similar model at manufacturers
option), without charge for either parts or labour. In case of a defect please contact the dealer where you originally
purchased this product. The warranty will not apply to this product if it has been misused, abused or altered. Without
limiting the foregoing, leakage of the battery, bending or dropping the unit are presumed to be defects resulting from
misuse or abuse.
EXCEPTIONS FROM RESPONSIBILITY
1. The user of this product is expected to follow the instructions given in the user manual. Although all instruments
left our warehouse in perfect condition and adjustment the user is expected to carry out periodic checks of the
product’s accuracy and general performance.
2. The manufacturer, or its representatives, assumes no responsibility of results of a faulty or intentional usage or
misuse including any direct, indirect, consequential damage, and loss of profits.
3. The manufacturer, or its representatives, assumes no responsibility for consequential damage, and loss of profits
by any disaster (earthquake, storm, flood etc.), fire, accident, or an act of a third party and/or a usage in other
than usual conditions.
4. The manufacturer, or its representatives, assumes no responsibility for any damage, and loss of profits due to
a change of data, loss of data and interruption of business etc., caused by using the product or an unusable
product.
5. The manufacturer, or its representatives, assumes no responsibility for any damage, and loss of profits caused
by usage other than explained in the user‘ manual.
6. The manufacturer, or its representatives, assumes no responsibility for damage caused by wrong movement or
action due to connecting with other products.

geo-FENNEL GmbH
Kupferstraße 6
D-34225 Baunatal
Tel. +49 561 / 49 21 45
Fax +49 561 / 49 72 34
[e-mail]
www.geo-fennel.de
Technische Änderungen vorbehalten.
All instruments subject to technical changes.
Sous réserve de modifications techniques.
Precision by tradition.
04/2014