Wireless Motion Sensor slow to start

[KSG]

I have a wireless motion sensor and I have tried setting on my alarm
and then starting in the back of the room to see how far I can get. I
notice that if I do this test immediately after the alarm system delay
is finished the motion sensor doesn't go off, even if I jump in front
of the sensor. But if I wait a few minutes, then it does catch me.

Is there some additional delay before the motion sensor starts? Is
this to preserve battery life that it only checks to see if the alarm
is set every five minutes or something?

Thanks!

KSG

 

[Jim Rojas]

Most wireless motion detectors will wait 2 minutes in between picking you up
to help conserve power. If it did not do this, you would be replacing the
batteries often.

Jim Rojas

 

[Frank Olson]

I have a wireless motion sensor and I have tried setting on my alarm
and then starting in the back of the room to see how far I can get. I
notice that if I do this test immediately after the alarm system delay
is finished the motion sensor doesn't go off, even if I jump in front
of the sensor. But if I wait a few minutes, then it does catch me.

Is there some additional delay before the motion sensor starts? Is
this to preserve battery life that it only checks to see if the alarm
is set every five minutes or something?

Thanks!

KSG

There's usually a three minute "reset" incorporated into the PIR's
transmitter. This basically "saves" the battery. If the unit were to
transmit continuously, you'd be changing batteries in it on a weekly
basis. After the three minutes expires, the sensor is "armed" to
receive IR energy and transmit an alarm instantly. When that happens it
goes "dormant" for another three minutes and the whole process starts over.

Frank Olson
http://www.yoursecuritysource.com

 

[KSG]

Jim, thanks for the quick reply. Let me restate to be sure that I
understand.

You're saying that the wireless alarm samples for movemeent every two
minutes, hence missing me for the first couple of minutes as I jujmp in
front of the alarm.

Thanks!

KSG

 

[KSG]

Ignore my posting preceedin this one. I got it.

Thanks to both you and Frank!

KSG

 

[KSG]

Ignore my posting preceedin this one. I got it.

Thanks to both you and Frank!

KSG

 

[Karl Magnus]

Jim, thanks for the quick reply. Let me restate to be sure that I
understand.

You're saying that the wireless alarm samples for movemeent every two
minutes, hence missing me for the first couple of minutes as I jujmp in
front of the alarm.

Thanks!

KSG

No, it "sees" you all the time. However, if it senses motion, and it has
transmitted in the last 2 mins, it will not transmit again until it sees
two minutes of "silence" and THEN detects motion. (supervisories not
included)