aarcsystems.com
AARC-EVAC Wireless Alert Transmitters
Installation & Operation Manual
4
Maintenance
The UPS Battery condition should be checked regularly for correct
operation. This can be done by observing the battery condition indicator
on the bottom of the unit (see below for details).
This procedure should be added to your company or organisation’s
maintenance schedule.
AC Power & UPS Battery Condition Indicator
The LED light in the clear lens at the bottom of the box will indicate the
condition of the UPS battery/AC power supply to the unit.
Constant
Green
Battery Voltage good, AC Power Supply connected, system
running.
Guide to Setting Sound Levels
Precheck the normal background noise level (the Base noise level) in
each area to be covered by the AARC-EVAC system. This should be
done using a standard Sound Pressure Level (SPL) meter. This will dis-
In setting the audio level for each speaker the goal is to have an alarm
audio level at minimum 3dB higher than the Base noise level.
1.
Go to the furthest point away from the speaker or the highest noise
level (as previously mentioned and recorded) within the area to be
covered by that speaker.
2.
Activate the Evac and measure the sound pressure level at that point.
3.
Adjust the respective volume control (
6
,
7
,
8
, or
9
) whilst
monitoring the audio SPL so that the Alarm SPL is set 3dB above the
Base noise level.
4.
Check the SPL within the coverage area, in particular closer to the
speaker. The maximum SPL within the area should be no more than
6dB above the Base noise level.
5.
If the alarm SPL is higher than 6dB above the Base noise level, try
increasing the height of the speaker to take it further away from the
working height of a person standing within that space. If this is not
practical or the SPL is still greater than 6dB above the Base noise
level then the speaker needs to be moved closer to the noise source
so as to achieve the 3dB–6dB SPL alarm level goal range. The other
alternative is to change to an EVAC unit with more speakers or add
an additional EVAC unit so that the sound can be better distributed.
Green Slow Flash
Battery Voltage good, AC Power Supply off line system running
on UPS.
Green Rapid Flash
Power supply connected, unit internal power switch ( ) is in
the off position (system switched off).
Red
Constant
AC Power connected Battery charging Condition, system off,
whilst Battery Low.
Red Rapid Flash
Battery test failed but battery serviceable, AC Power Supply
Red Flash once every 15s, Buzzer sounds every 60s
Green Constant with Brief Red Flash and Buzzer every 4s
AC Power Supply connected, system running, UPS Battery
Voltage Low, not serviceable and battery replacement required.
Replacement Battery: 7Ah 12V Sealed Lead Acid (SLA) Battery
14