Sensaphone 400 User Manual

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Chapter 2: Installation

2 .8 the mICrophone

The Model 400 is provided with a built-in microphone which is used to

monitor high sound levels produced near the installation site. The sensitiv-

ity of the microphone is configurable and will detect a continuous as well

as a pulsating alarm. Note that beeping alarms that have a half second or

more of silence between beeps will not be detected.
Other programming options that apply to the microphone include setting

the length of time before a high sound causes an alarm.
If this sound level exists for 8 consecutive seconds (default) or for the pro-

grammed length of time, the Model 400 will dial out with an alarm mes-

sage.

NOTE: The proximity of the audible alarm to the microphone is

extremely important.

Normally, the Model 400 and the audible alarm must be in the same room.

The maximum distance can vary considerably depending on the alarm, the

acoustics, and the size of the room.
During an alarm dial-out, the microphone allows four-second intervals to

listen-in to sounds at the Model 400’s location.
When calling for a Status Report, the microphone permits listening to on-

site sounds for a programmed time interval.

2 .9 alert ZoneS

Open the input/output wiring door located above the keypad.The Model

400 can monitor up to 4 zones (represented by the numbered terminal

screws shown in Figure 2-5, below).

1 C

ZONES

2 C

3 C

4 C

Figure 2-5 Alert Zones

Zones are configured as either dry contact or temperature. A zone config-

ured as dry contact can be used with any normally open (N.O.) or normally

closed (N.C.) device. “Open” refers to an opened circuit path; if conditions

cause the circuit to close, an alert condition occurs. “Closed” refers to a

continuous circuit path; if a closed circuit is opened, an alert condition

occurs. The Model 400 determines the way zones are configured by the

type of sensor connected to each alert zone (refer to Chapter 5.)
A zone configured as “temperature” is designed to evaluate a range of

settings. The Model 400 will read the temperature at the sensor’s loca-