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8 MAINTENANCE AND CARE
We have designed all optical elements and surfaces to be
easy to care for. To guarantee the optical brilliance of
your binoculars over a long period of time, keep the lens
surfaces free of dirt, oil and grease. To clean the lenses,
please remove larger particles by blowing on the lens. For
subsequent lens cleaning we recommend the use of the
enclosed cleaning cloth. In the event of hard-to-remove
grease spots, finger prints or dried-on drops of water,
breathe slightly on the lenses or moisten them with a damp
cloth and clean cautiously. Make sure that the cleaning
material is always kept clean. Dirt in the cloth may cause
damages to the lens coating.
8.1 Replacing the battery
(HELIA RF & HELIA RF-M)
Check how much charge is left in the battery. Seeing a
flashing battery symbol when the instrument is switched on
indicates a low battery. From the time the low battery
indicator first starts flashing, there is sufficient power for
around 100 more measurements.
Replacing the battery:
Open the battery com-
partment cap on the
central focusing (HELIA RF)
or on the eyepiece (HELIA
RF-M). Remove the dead
battery. Insert a new CR 2
battery, making sure that
the poles are correctly
aligned (see markings inside com part ment). Use leak-
proof batteries only.
Warning:
Do not use recharge able
batteries ! Finally, screw the battery cover back on.
6.2 Single measurement
The aiming mark will appear when the measurement
button is pressed briefly. After the button is released, the
measured range is shown on the display.
6.3 Scan measurement
Scan Mode is used to continually measure the range
of moving targets. The instrument switches to Scan Mode
automatically if the measurement button is held down for
over 3 seconds. In Scan Mode, measurements will be
taken continually until the measurement button is released.
6.4 Angle measurement
In addition to the distance measurement, the angle of your
measuring position to any target can be shown on the
displays upper area.
6.5 KAHLES EAC-function
Not only the distance measurement but also the KAHLES
EAC-function – Enhanced Angle Compensation (patent
pending) which is based on the classic Rifleman’s Rule –
can be shown. While the Rifleman’s rule only provides the
slant range based on pure mathematics the EAC-function
also considers the different ballistics and provides you a
more relevant basis. (For more information please visit
www.kahles.at)
6.6 Temperature and airpressure display
(HELIA RF-M)
By briefly pressing the mode button, on the display the
temperature appears for 3 seconds, then the air pressure
in hPA.
7 DISPLAY INTENSITY
(HELIA RF & HELIA RF-M)
There are 5 brightness levels to choose from. If the display
is activated a short pressing of the mode button changes
the display intensity.
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