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6. OPERATION INSTRUCTIONS
6.1 Installing battery
Unit is supplied with battery not installed.
Prior to installing the battery, make sure the switch (1) is in the
OFF position and the lens cap is on.
The unit can operate on either AA Alkaline or CR-123 Lithium
battery. Lithium battery provides approximately twice longer
battery life and better performance at low temperatures.
To install battery unscrew the battery compartment cover (6).
When using CR-123 Lithium type battery, remove the battery
type adapter. Observe the correct polarity indicated on the
housing. Put the battery in and screw the battery cover back on.
6.2 Switching the Unit on
In daytime put on the lens cap with the daylight filter prior to
switching on.
To check if the Unit is operational switch it ON (rotate switch (1)
clockwise) and look through eyepiece (4). You should see
greenish-lit screen. If the screen is not lit check the battery.
When the Unit is ON through the eyepiece user may see either
one or two circular indicators (Fig. 2). When not active they are
hardly noticeable. Bright yellow or flashing red spot indicate low
battery voltage. For uninterrupted operation keep a fresh battery
ready and replace it on time. Bright red indicator reminds the
user that the IR illuminator is on (for more details see 6.9).