Response time for Abus 2WAY motion sensors

[olle]

(28-11-2013 21:51)techniker28 schrieb:  Manual page14:

"Note: When delivered, the sensor cover may be set in the lowered position. Check this as a possible cause if the sensor does not detect any movement.
Attaching"

Yes, I've read that as well. I paid special attention to that line.
I've compared the photo to the sensor's inside, but I see no match.
I simply cannot see any possible way the cover can be in the lowered position.
The thing/plastic that can flip according to the picture is not in my sensors. empty.