AKO AKO-575 Series, User Manual

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5750H002 Ed.03
12
GAS concentr
ation (PPM)
AL6
AL8 AL5
AL6 - AL7
Alarm
ON
Alarm
OFF
Pre-
Alarm
OFF
Pre-
Alarm
ON
AL3
AL3 - AL4
Alarms
The transmitter emits an acoustic alarm, the alarm indicator flashes and activates the relays when certain gas
concentration levels are exceeded. If the transmitter is connected to a station, the station will emit the acoustic
alarm. The relays will be activated in both devices.
There are two alarm levels depending on the concentration of gas detected: Pre-Alarm and Alarm. These levels
have a factory setting of 500 and 1000 PPM respectively. These values comply with domestic and international
regulations. However, please ensure that these values comply with current local regulations. In order to modify
these values, parameter
AL1 should be configured to 1.
Pre-Alarm
Warns the user that the gas concentration is increasing.
The Pre-Alarm relay can be connected to air extraction systems to disregard possible temporary leaks or false
detections caused by external agents.
The activation level of the Pre-Alarm is determined by parameter
AL3 and is deactivated when it drops below AL3
minus differential AL4 .
Parameter AL5 can be used to apply a delay period between AL3 being exceeded and the Pre-Alarm being set off.
Parameter AL2 can be used to disable the Pre-Alarm. Before doing this, ensure that relevant regulations permit this
action.
Alarm
Warns the user that the gas concentration has reached high levels.
It is advisable to use the alarm relay to halt installation by connecting it to the security chain.
The activation level of the Pre-Alarm is determined by parameter
AL6 and is deactivated when it drops below AL6
minus differential AL7 .
Parameter AL8 can be used to apply a delay period between AL6 being exceeded and the Alarm being set off.
Digital inputs
The transmitter has 2 digital inputs which are used to remotely activate the Mute (DI1) and Set Hold (DI2)
functions. The wiring of both is explained on page 8.
Pressing once activates or deactivates each function. The polarity of the inputs is configured using parameters
I11
(DI1) and I21 (DI2).