Lit. #: 91-0223/03-01
LASER RANGING SYSTEM
I N S T R U C T I O N S
400
2 0 - 0 4 0 5
Y A R D A G E P R O ® Your YARDAGE PRO® 4 00 is a precision 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 fine instrument. To ensure optimal performance and longevity, please read these instructions before using your YARDAGE PRO® 400.
when the laser is active, what the quality level (a measure of reflectivity) of the target is, what the precision tolerances of a specific measurement are and when the battery charge is low (see Figure 2). A summary of these features is presented below:
U n i t o f M e a s u r e O p t i o n s The YARDAGE PRO® 400 can be used to measure
distances in yards or meters. The unit of measure indicators are located in the lower right
portion of the LCD. To select between yards and meters look through the mon ocular, depress
the “mode“ button (see Figure 3) (lower right hand side of the unit) and hold it down for |
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approximately 5 seconds. If you are changing from yards to meters, a change in unit of |
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measure will be indicated by the illumination of the METE R indicator while the YARD indicator |
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is turned off. If you are changing from meters to yards, the opposite |
will occur. Note: The |
YARDAGE PRO® 400 will return to the last setting used, each time the |
unit is turned-on. |
T a r g e t i n g M o d e s
S TA N D A R D (LCD Indicator - none) – This setting allows most targets to be distanced up to
400 yards. Used for moderately reflective targets that are typical of most distancing situations.
S C A N (LCD Indicator - “SCAN”) – This mode allows the range to be continuously updated for
10 seconds when the fire button remains depressed. It can be used to scan an area containing several objects or a single object that is moving. Note: Objects further away require a slower scanning pace than objects at a closer distance. The minimum distance in this mode is the same as in the standard mode.
I l l u m i n a t i n g I n d i c a t o r s
A C T I V E L A S E R (LCD Indicator - “LASER”) – Located in the upper left portion of LCD. When illuminated, indicates that energy pulses are being emitted from unit.
I N T R O D U C T I O N The YARDAGE PRO® 400 emits invisible, eyesafe, infrared energy pulses. Sophisticated circuitry and a high speed clock are used to instantaneously calculate distances, by measuring the time it takes for each pulse to travel from the rangefinder, to the target, and back.
The ranging accuracy |
of the YARDAGE PRO® 400 is plus or minus one |
yard / meter under most circumstances (see description of “Precision” |
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indicator below). The |
maximum range of the instrument depends on the |
reflectivity |
of |
the target. |
The |
maximum distance for most objects |
is |
400 yards |
/ |
meters while |
for |
highly reflective objects the maximum |
is |
999 yards / meters. 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 object is being distanced to.
The color, surface finish, size and shape of the target all effect reflectivity and range. The brighter the color, the longer the range. Red is highly reflective, for example, and allows longer ranges than the color black, which is the least reflective color. 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 degree 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.
O P E R A T I O N A L S U M M A R Y While looking through the monocular, depress the fire button (see Figure 1) (top right hand side of unit) once to activate the inview display system (LCD). Aim the YARDAGE PRO® 400 at a target at least 21 yards away, depress and hold the fire button
down until range reading is displayed. Release the fire button. Note: Once activated, the YARDAGE PRO® 400’s LCD will remain active and display the last distance measurement for 30 seconds. You can depress the fire 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.
F E A T U R E S The YARDAGE PRO’s sophisticated circuitry allows you to select between various units of measure and targeting modes. In addition, your YARDAGE PRO’s LCD incorporates illuminated indicators that advise you
Fire Button
(LCD)
Figure 1
Figure 2
Mode Button
Figure 3
Figure 4
T A R G E T Q U A L I T Y |
G A U G E |
(LCD Indicator - “TAR GET QUALITY”) – Located |
in the upper middle |
porti on of |
LCD. Gauge indicating amount of energy pulses |
being received back from the target. Gauge is calibrated to fill squares from left to right. The higher the number of returning energy pulses, the greater the number of squares that will fill with illumination. This gauge can be used to scan
acro ss a target that is difficult to acquire to |
find the |
most |
reflective |
point for |
ranging (see Trouble Shooting Table). |
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P R E C I S I O N P A R A M E T E R I N D I C A T O R |
(LCD Indicator |
- “PRECISION”) – |
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When illuminated, indicates the distance measurement |
is within plus |
or minus |
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1 yard or meter. If it is not illuminated after obtaining a measurement, the distance measurement is within plus or minus 3 yards or meters.
L O W |
B A T T E R Y |
C H A R G E (LCD |
Indicator - |
“BATT”) – When |
illuminated, |
indicates the battery charge is low and battery should be replaced. |
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R o l l |
D o w n |
E y e c u p |
The YARDAGE |
PRO’s mon ocular |
is equipped |
with a rubber eyecup designed for your comfort and to exclude extraneous external light. If you wear sun / eyeglasses, roll down the eyecup. This will bring your eye closer to the ocular lens, thus providing improved field of view.
S P E C I F I C A T I O N S :
O p t i c a l D e s i g n The YARDAGE PRO® 400 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 a reticle for targeting, yard / meter and mode designations, a target quality gauge, as well as precision 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, cannot be fully eliminated in the manufacturing process and do not affect the distancing performance of the unit.
Magnification.......5x |
Field of View.......5.7˚ |
Eye Relief.......25 mm |
Exit Pupil.......4.2mm |
P o w e r S o u r c e |
The YARDAGE PRO® 400 is powered by one 9-volt |
alkaline battery. (Use only high quality alkaline batteries. Do not use heavy duty or lithium batteries).
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