RISCO Group Industrial LuNAR DT AM Grade 3 Guide D'installation page 17

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Perform lens adjustment and DIP switch settings as described in "Lens Adjustment" on page 12 and on page
15.
Mount the top cover on the detector's base.
Tighten the top cover's central screw.
Replace the detector's protection cap.
NOTE:
For a ceiling tamper, affix the back tamper screw as
shown in Figure 5.
Lens Adjustment:
The Ind. LuNAR RK200DTG3 has three - Fresnel lenses attached to the cover, located in sensor protective
sleeves. Adjust the position of the lenses based on the ceiling mounting height as follows:
Press the 2 clips attaching the sleeve (Figure 6) to the detector's cover, and gently pull out the sleeve.
16 Ind. LuNAR RK200DTG3 Installation Guide
FIGURE 6