York Survey Supply Pro Sport 850 User manual

Code: 431540
Operating
Instructions
Ref:.. \operat98\instructions 18\431540.qxp 05-01-18 ©York Survey Supply Centre 2018
Prospect House
George Cayley Drive
Clifton Moor
York
England
Y 30 4XE
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Pro Sport 850
Laser Rangefinder

©York Survey Supply Centre 2018Ref:.. \operat98\instructions 18\431540.qxp 05-01-18
Pro Sport 850
Laser Rangefinder
Congratulations on your purchase of the Bushnell
Sport 850 Laser Rangefinder. The Sport 850 is a
precision laser rangefinding optical instrument
designed to provide many years of enjoyment. This
booklet will help you achieve optimum performance
by explaining its adjustments and features as well
as how to care for this device. To ensure optimal
performance and longevity, please read these
instructions before using your Sport 850 laser
rangefinder.
HOW OUR DIGITAL TECHNOLOGY WORKS
The Sport 850 emits invisible, eye safe, infrared
energy pulses. The Sport 850’s Advanced Digital
microprocessor and ASIC chip (Application-Specific
Integrated Circuit) results in instantaneous and
accurate readings every time. Sophisticated digital
technology instantaneously calculates distances by
measuring the time it takes for each pulse to travel
from the rangefinder to the target and back.
RANGING ACCURACY
The ranging accuracy of the Sport 850 is plus or
minus one yard/metre under most circumstances.
The maximum range of the instrument depends on
the reflectivity of the target. The maximum distance
for most objects is 600yds/549m while for highly
reflective objects the maximum is 850yds/777m.
Note: You will get both longer and shorter maximum
distances depending on the reflective properties of
the particular target and the environmental
conditions at the time the distance of an object is
being measured.
The colour, surface finish, size and shape of the
target all affect reflectivity and range. The brighter
the colour, the longer the range. White is highly
reflective, for example, and allows longer ranges
than the colour black, which is the least reflective
colour. A shiny finish provides more range than a
dull one. A small target is more difficult to range than
a larger target. The angle to the target also has an
effect. Shooting to a target at a 90° angle (where
the target surface is perpendicular to the flight path
of the emitted energy pulses) provides good range
while a steep angle on the other hand, provides
limited ranging. In addition, lighting conditions (e.g.
the amount of sunlight) will affect the ranging
capabilities of the unit. The less light (e.g. overcast
skies) the farther the unit’s maximum range will be.
Conversely, very sunny days will decrease the unit’s
maximum range.
GETTING STARTED
INSERTING THE BATTERY
Remove the battery cap by lifting the battery door
tab and then rotating counter clockwise. Insert a
CR2 3V Lithium battery into the compartment
positive end first, then replace the battery cap.
N TE: It is recommended that the battery be
replaced at least once every twelve months.
OPERATIONAL SUMMARY
While looking through the 4x eyepiece, depress the
power button once to activate the in-view Liquid
Crystal Display (LCD). Place the aiming circle
(located in the centre of the field of view) upon a
target at least 5 yards away, depress and hold the
power button down until the range reading is
displayed near the bottom of the in-view display.
Crosshairs surrounding the aiming circle indicate
that the laser is being transmitted. nce a range
has been acquired, you can release the power
button. The crosshairs surrounding the aiming circle
will disappear once the power button has been
released (i.e. the laser is no longer being
transmitted). Note: nce activated, the LCD will
remain active and display the last distance
measurement for 30 seconds. You can depress the
power button again at any time to distance to a new
target. As with any laser device, it is not
recommended to directly view the emissions for
long periods of time with magnified lenses. The
maximum time the laser is transmitted (fired) is 10
seconds. To re-fire, press the button down again.
OPTICAL DESIGN
The Sport 850 features a Perma Focus monocular
optical system for viewing your target. A liquid
crystal display (LCD) is mounted within the optical
system and when activated, displays unit of
measure, a reticle for targeting, when the laser is
actively firing, when a target has been acquired and
low battery indicators. Inherent in the manufacturing
process are small black spots that appear in the
optical system. These are a natural characteristic of
the LCD and cannot be fully eliminated in the
manufacturing process. They do not affect the
distancing performance of the unit. A summary of
these features is presented below.
UNIT OF MEASURE OPTIONS
The Sport 850 can be used to measure distances
in yards or metres. The unit of measure indicators
are located in the lower right portion of the LCD. To
select between yards and metres, the unit should
be off. While looking through the eyepiece, press
and hold the P WER button down for
approximately 5 seconds. During this time all liquid
crystal segments and icons will be displayed. As
you continue to depress the power button, the
display will toggle back and forth between Yards
and Metres. nce the unit of measure desired is
displayed, simply release the power button. The
device will return to the last unit of measure setting
used each time the unit is turned on.
RETICLE FOR TARGETING OBJECTS
Place the aiming circle (located in the centre of the
field of view) upon a target at least 5 yards away,
depress and hold the power button down until the
range reading is displayed near the bottom of the
in-view display.
ACTIVE LASER
Crosshairs surrounding the aiming circle indicate
that the laser is being transmitted. nce a range
has been acquired, you can release the power
button. The crosshairs surrounding the circle will
disappear once the power button has been
released (i.e. the laser is no longer being
transmitted).
BATTERY LIFE INDICATOR
Battery indicator: Within the display is a battery
icon
Full charge
2/3 battery life remaining
1/3 battery life remaining
Battery indicator blinks - battery needs to be
replaced and unit will not be operable.
SPECIFICATIONS:
Dimensions: 35 x 74 x 97mm
Weight: 170g
Ranging accuracy: ±1yd
Range: 5 - 850yds / 5 - 777m
Magnification: 4x
bjective diameter: 20mm
ptical coatings: Fully coated
Display: LCD
Power source: 3V Lithium (included)
Field of view: 430ft @ 1000yds
Extra long eye relief: 17mm
Exit pupil: 5.0mm
RainProof
Includes battery and carry case
CLEANING
Gently blow away any dust or debris on the lenses
(or use a soft lens brush). To remove dirt or
fingerprints, clean with a soft cotton cloth, rubbing
in a circular motion. Use of a coarse cloth or
unnecessary rubbing may scratch the lens surface
and eventually cause permanent damage. For a
more thorough cleaning, photographic lens tissue
and photographic-type lens cleaning fluid or
isopropyl alcohol may be used. Always apply the
fluid to the cleaning cloth - never directly on the
lens.
TROUBLESHOOTING TABLE
If the unit does not turn on - LCD does not
illuminate:
• Depress the P WER button.
• Check and, if necessary, replace battery.
If the unit powers down (display goes blank when
attempting to power the laser):
• The battery is either weak or low quality. Replace
the battery with a good quality 3V Lithium battery.
If target range cannot be obtained:
• Make sure LCD is illuminated
• Make sure that the power button is depressed
• Make sure that nothing, such as your hand or
finger, is blocking the objective lenses (lenses
closest to the target) that emit and receive the laser
pulses
• Make sure unit is held steady while depressing
power button
N TE: The last range reading does not need to be
cleared before ranging another target. Simply aim
at the new target using the LCD’s reticle, depress
the power button and hold until new range reading
is displayed.
Specifications, instructions and the operation of
these products are subject to change without
notice.