INFICON
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743-202-xxx LDM150 Operating Manual 200305
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6.
Service Function
Pressing the ”Reset/Test/Service” button (5
- Fig. 1) for 10 seconds will disengage all alarm functions
for 60 minutes. During this period, it is always possible to start a new 60-minutes period by pressing
the button for 10 seconds again. Return to active status happens automatically at the end of the 60-
minutes period or may be done manually by a single press on the “Reset/Test/Service”
-button. When
the service function is activated all LED’s will flash and all r
elays will be in normal mode position.
See Fig. 3
7.
Installation/Positioning
The general rule is that the detector should be placed as close to the potential leak as possible, and at
the same time consider the gas density and any air movements in the room. The detector must also
be positioned in such a way that it is easily accessible for service. See Fig. 4 for suggestions on
suitable placement.
8.
Calibration, Alarm Setting
The detectors are delivered for a specific gas type and other calibrations are normally not necessary.
The detector is named with the required gas type being detected. It is, however, very easy to change
the thresholds by using MCT150 Monitor Calibration Tool.
MCT150 Monitor Calibration Tool is connected to the test terminal. (3 - Fig. 1)
9.
Annual Function Control
Testing the system is recommended to be done at least once a year. A basic function test can be
made using the MCT150 Monitor Calibration Tool.
10.
Automatic/Manual Alarm Reset
Is managed by DIP switch (1 - Fig. 1) n
o
3 where “ON” means automatic reset and “OFF” means
manual reset by pressing the “Reset/Test/Service”
button (5 - Fig. 1 - located under the cover).
11.
Alarm Time Delay (T1)
Is managed by DIP-switches (1 - Fig. 1) n
o
1 and n
o
2:
n
o
1
n
o
2
Alarm delay
ON
ON
No alarm delay
OFF
ON
(1) minutes alarm delay
ON
OFF (10) minutes alarm delay
OFF
OFF (30) minutes alarm delay
12.
Self-Test Function
Press the “Reset/Test/Service” button (5
- Fig. 1) for 5 seconds and the test program will start and go
through all LED functions and all relay functions in five seconds intervals. See Fig. 2.
