Function - INFICON LDM150 Betriebshandbuch

5. Function

When power supply is switched on, a green LED will flash to indicate power "ON". This will also start
the heating process of the sensor. After approximately 4 minutes the green LED will light and indicate
"Sensor Active".
The detector has one yellow and two red LEDs. The yellow LED indicates low gas concentration
(Alarm C) and the red LEDs indicate medium gas concentration (Alarm B) and high gas concentration
(Alarm A).
When gas is detected the LEDs (2 - Fig. 1) will light and the relay corresponding to the alarm level will
change state. If alarm delay is chosen (see below) the respective LED will flash, and it will light (and
the relay will change state) when the chosen delay time is exceeded. See Fig. 1.
High-intensity LED lights up at B-alarm, buzzer is activated at A-alarm.
NOTE!
The alarm functions in the lid of the LDM150R are not deactivated when in service
mode.
The time delay does not apply to LEDs and buzzer in the lid of the LDM150R.
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1.1: n 1 - Delay
1.2: n 2 - Delay
1.3: n 3 - Alarm reset: ON=Auto, OFF=Manual
1.4: n 4 - Not used
2.1: LED A
2.2: LED B
2.3: LED C
2.4: Power
3.1: GV Offset
3.2: +5 VDC
3.3: (-)
3.4: ALARM C
3.5: ALARM B
3.6: ALARM A
3.7: Test terminal
4.1: A adjustment
4.2: B adjustment
4.3: C adjustment
5: Reset/Test/Service
743-203-xxx LDM150R Operating Manual 200305
INFICON