Installation and User Guide for Ultrasonic Gas Leak Detectors
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4. power reqUIreMents
The detectors are powered by an external 24V DC supply (min. 13 V DC, max. 28 V DC). The maximum
power consumption of one detector is approximately 30 mA. The detectors must be electrically connected
via certified barriers placed outside the hazardous area.
Intrinsically safe specifications:
Vmax/Ui = 28 Vdc Imax/Ii = 100 mA Li = 0.01 mH Ci = 10 nF Pi = 0.75 W
5. adjUstMents
5.1. Adjustable Alarm Level settings
The Gassonic MM0100 / EH6028 is equipped with an adjustable Alarm Trigger Level.
This should be adjusted to suit the local conditions.
The alarm has ten level settings:
GAssOnIC MM0100
GAssOnIC EH6028
Level setting
Trip sPL (dB)
Level setting
Trip sPL (dB)
0, 1 & 2
44
0
54
3
54
1
59
4
64
2
64
5
74
3
69
6
84*
4
74
7
94
5
79*
8 & 9
104
6
84
7
89
8
94
9
99
* Factory settings (unless otherwise specified)
The Detectors should be adjusted so that the alarm level is at least 6dB above the normal background
noise level in the area to be monitored.
A built-in green LED, positioned beside the attenuator indside the detector, helps you to find the correct
level setting.
Adjusting the Alarm Level
1. Using an Allen-key, remove the screw at the bottom of the detector.
2. Using a small, flat-blade screwdriver set the attenuator to the highest position. Adjust the level
downwards until the green LED lights. Increase the setting to at least the next attenuator position. The
detector now has the correct alarm level setting.
3. Replace the screw and secure it firmly using the Allen-key. It is important that the screw is tight and
sealed to prevent water entering the detector.
Summary of Contents for GASSSONIC MM0100
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