MULTIPLEX
Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL qmi@oilmist.com WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL +44 (0)20 7328 3121
Running Procedure Part3-4
SETTING AND CHANGING ALARM LEVELS
The QMI MULTIPLEX System is pre-set. However should the settings require adjustment
and the alarm level set lower, then follow the procedure outlined below.
Normal setting for atmospheric systems should be as low as possible, say
0.04 to 0.05mg/L. This is so that once oil mist starts to form it will be detected as
soon as possible.
During the setting-up procedure normal operation of the CMU is disabled, therefore to
set and change alarm levels:
1. With the security key supplied (Q0103), release the security switch, which is
fitted to prevent unauthorised adjustment of the system.
2. Turn the key clockwise ¼ turn (and no more). The light above ‘Check Alarm
Settings’ will illuminate.
3. Place the magnetic pen (Q0109) flat against the circle marked ‘Check Alarm
Settings’.
4. Place the magnetic pen flat against the ‘Raise’ Alarm Level circle marked with
‘+’ or the ‘Lower’ Alarm Level circle marked with ‘ –‘. Raise or Lower the level,
each time removing the pen away from the circle for each increment of Oil Mist
level until the required level is reached. The level will be indicated on the digital
‘Reading’.
5. Place the magnetic pen flat against the circle marked ‘Channel Number’ to set
that channel to the level indicated at the digital reading.
6. To set another channel repeat steps 4 and 5.
7. When setting is complete turn the key anti-clockwise back ¼ turn, this locks the
system, then remove the key.
8. Now the system is locked, it is possible to check the settings by placing the pen
on ‘Check Alarm Settings’ then on ‘Channel Number’. The new set level will then
be displayed.
9. To reset any channel ALL above items MUST be repeated.
CHANGING THE DIGITAL DISPLAY USING THE MAGNETIC PEN (Q0109)
Oil mist level reading, setting,
and fault location readout
Channel
identification
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