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Gassonic MM0100 / EH6028
5.2. alarM delaY & CUt-on freqUenCY settInGs
5.2.1 GAssOnIC EH6028
The Alarm Delay and Cut-on Frequency settings are fixed in the Gassonic EH6028.
These values are:
Alarm Delay: 0 seconds
Cut-on frequency: 25 kHz
5.2.2 GAssOnIC M0100
The Gassonic MM0100 is equipped with an adjustable Alarm Level, Alarm Delay and a Cut-on Frequency.
These should be adjusted to suit the local conditions.
5.2.2.1. Alarm Delay
The Gassonic MM0100 is fitted with an Alarm Delay function. This can prevent short duration ultrasound
noise events, which exceed the alarm level, from triggering the alarm. Gas leaks normally produce an
almost constant ultrasound level. The detector may be subjected to short duration ultrasound noise
events, such as air-valves, sirens or loud bangs, which exceed the alarm level. By adjusting the alarm delay
to a period longer than these events it will be able to illuminate false alarms.
The alarm delay is set using the dip switches inside the detector. The time delays and the corresponding
dip switch positions are shown below:
Dip On.
Delay
1
0
2
15 sec*
3
30 sec
4
2 min
5
4 min
6
8 min
* Factory settings
The time-delay is typically set between 15 seconds and 2 minutes. However, this depends entirely on the
duration of the noise events. The alarm delay can be set up to 8 minutes.
If a delay longer than 8 minutes is necessary, an external delay unit can be added.
5.2.2.2. Cut-on Frequencies
The detector can also be set so that it ignores frequencies below a defined level. The H.P. filter controls
this “cut-on” option. The frequency is defined using the dipswitches labelled 7 and 8.
DIP 7
DIP 8
Freq. (kHz)
On
On
25*
Off
On
20
On
Off
15
Off
Off
10
* Factory settings
Summary of Contents for GASSSONIC EH6028
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