Alarm trigger delayed?

[34Ford 0]

Im using some IR motion detectors to trigger my dvr thru the alarm inputs.

Set up as Normally Open.

 

I used these on my old 4ch dvr and they worked great, but on this new one there is a 10 or 15 second delay from the time the sensor triggers till the dvr records.

 

This is not acceptable. Is there a setting maybe in the setup Im missing.

The manual that come with this thing of course is a crop over from Chinese and theres not much explanation.

[todd2 0]

Can you give us the brand and model number of your new DVR? There's

not much anyone can do without the specifics.

 

If your DVR has a 'prealarm' feature, you might be able to use that to

help the situation. The 'prealarm' feature will store several seconds

before the alarm trips for alarm triggered recording. The actual amount

depends upon the memory dedicated to the feature and the FPS.

 

As for myself, I have my DVR on continuous (timer) record, as well

as event (motion) triggering. Hard drives these days are large enough

that I can go for like a week with continuous record with no problem,

and the DVR logs the motion detection events so I can go back and

look at the recordings. (In effect, they're acting as 'hints' to focus me.)

 

I haven't tried the external triggering of the AVC761 but I haven't heard

anything bad about it. Again, you'll need to give the specifications of yours.

[34Ford 0]

Well I changed the alarms settings to N.C. and it appears to have fixed it.

 

Dont make sense why it would even work with it set to N.O.

 

Go figure.

[todd2 0]

Hmm. My guess is that your PIR was activating for 10-15 seconds

during your original tests, and your DVR was detecting the transition

when it shut off (to a 'no alarm' condition). Thus, your DVR was

starting to record when the motion stopped.

[34Ford 0]

Yep, I bet your right. It does sound like when the 10 seconds lapsed then the sensor went back it started the recording.