4.0 Alarm Configuration / Calibration
The alarm is supplied with a factory configuration.
The only part of the configuration that can be changed is the setting for the Sash
High repeat timer time delay -- if required this can be changed by connection to a
Laptop or PC via the RS232 com port.
The alarm is supplied in the single point calibration mode’
To calibrate the alarm the airflow is reduced to the alarm point mechanically and
this airflow is ‘captured’ by the alarm. The airflow is then mechanically restored to
the normal operating value and the Low Air alarm will activate if the airflow
subsequently falls to the alarm point
See ‘Quick Start Installation’ below for details of the Calibration procedures
5.0 Start up
When unit is powered up the following sequence of events occur :-
1. The 12V DC power is applied to the airflow sensor and the alarm then
performs a self test on the functions , LEDs and audible alarm ( 2 secs ) and
then initiates a delay timer of 30 secs to allow the airflow sensor to stabilise.
2. During the whole of the 30 sec period all alarms and relay outputs are
inhibited and the Red & Green LEDs will be permanently ON.
3. At the end of the 30 sec delay the unit performs one of two options :-
a.
If the alarm calibration has been previously completed – the unit goes to
normal operating mode ( Run )
b.
If the unit has not been calibrated -- the Red & Green LEDs will flash on/off
and the audible alarm will be muted. It is then possible to press the Enter
button for 5 secs and go into the calibration mode.
(See Quick Start Installation’ below for details of the Calibration procedures)
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