Specifications

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3.3 OPERATING PROCEDURES
3.3.1 OPERATING PROCEDURES
These procedures should be performed under nighttime conditions only.
CAUTION:
UseoftheSiriusbrightlylitconditionsmaydamagetheunit’sintensiertube.
1. Verifythatthebatteryisinstalledasindicatedonthemonocularbody.
2. Make a visual estimation of the illumination level in the viewing area. The required level of illumina-
tion is less than 1 lx (late twilight sky conditions).
3. Remove the lens cap and place it over the housing of the lens.
CAUTION:
Before removing the objective lens cap, verify that the photoreceiver is open.
4. Turn the function switch ON. After a slight delay, a green glow will appear in the eyepiece of the
monocular.
5. Adjust the unit diopter by rotating the ring of the eyepiece.
6. Observe the scene. Rotate the focus ring until the image is clear and sharp.
7. Adjust the brightness and contrast of the image using the gain control knob (SiriusM version).
CAUTION:
Bright sources such as relight, headlights, searchlights, etc. can damage the Sirius. Avoid ex-
posing the unit to these types of light sources.
7. Adjust the image brightness using the gain control knob (SiriusM version) to achieve the best pos-
sible image contrast.
3.3.2 IR ILLUMINATOR OPERATIONS
CAUTION:
Whenoperatingthedeviceinextremelydarkconditions,thelightfromtheunit’sIRilluminator
willbeinvisibletotheunaidedeye.However,thelightcanbedetectedbyotherNVDs.
NOTE:
The IR illuminator is designed to provide additional illumination (when needed) while viewing
scenes or targets from a short distance (up to 3m).
1. To activate the IR illuminator, turn the monocular on. Pull the IR illuminator out and ip the turn-pull
function switch (A) CW from ON to the IR position. A red light will appear in the eyepiece to indicate
that the IR illuminator is operating.
2. Focus the IR light, if necessary, by placing the pivotal focusing lens (B) onto the IR illuminator output
window (C).