How to adjust the sensitivity on the DS937 Motion Detector.

Dip switches 1 and 2 select sensitivity settings:

4 pulse counts is the recommended setting for locations where an intruder is expected to cover a sizable portion of the protection area. The detector tolerates harsh environments at this setting.
3 pulse counts is for locations where normal environmental transients are expected.
2 pulse counts is the normal setting for areas where thermal and illumination transients are minimal.
1 pulse count is for fast response to intruder signals. It is for use in quiet environments where thermal and illumination transients are not anticipated.

• Pulse Counts   Switch 1   Switch 2
•            1                        OFF            OFF
•            2                        ON               OFF
•            3                        OFF            ON
•            4                        ON              ON

Detection Range Adjustment:

• Used to fine tune sensitivity. Adjust for lowest sensitivity that provides good catch performance.