Viper 700 ESP User Manual download pdf (Page 14)

2000 Directed Electronics, Inc.

Your system has DEI

’s Nuisance Prevention

Circuitry (NPC

™

). It

prevents annoying repetitive trigger sequences due to faulty door

pin switches or environmental conditions such as thunder, jack-

hammers, airport noise, etc. Here’s how it works:

The alarm triggers three times. Each time, the same sensor or

switch is triggering the alarm. If the three triggers are within 60

minutes of each other, NPC

™

will interpret this pattern of triggers

as false alarms. After the third trigger, NPC

™

ignores, or bypasses,

that sensor or switch (along with any other sensors or switches

sharing the same zone) for 60 minutes.

If the bypassed sensor tries to trigger the security system while it

is being bypassed, the 60-minute bypass period will start over.

This ensures that a sensor that continually triggers will remain

bypassed.

Doors are covered by NPC differently: If the alarm is triggered by

an open door for three full cycles, the doors will be bypassed until

the trigger ceases.

NOTE: Arming and disarming the system does not reset this function!

The only ways to reset a bypassed zone are for it to not trigger for 60

minutes, or to turn on the ignition. If testing your system, it is

important to remember that the NPC programming can cause zones to be

bypassed and appear to stop working. If five chirps are heard when dis-

arming, NPC

™

has been engaged. If you wish to clear the NPC

™

memory, turn the ignition key on.

NPC

™

is programmable. See Programming Options section of this

guide.

Nuisance Prevention

Circuitry

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Viper 700 ESP User Manual Page 14