Quality Monitoring Instruments QMI MULTIPLEX Manual page 52

DETECTOR HEAD TEST SEQUENCE
If the display is showing 12 channels and (for example) only 7 Detector Heads have been fitted
then the display will show positions 8 to 12 as flashing amber, green and red lights. Also the
display reading will show 'F1' fault.
To correct or change the QMI MULTIPLEX to show only 7 channels and cancel the other
Switches showing, the following procedure is carried out:
1. Turn off QMI MULTIPLEX Monitor to switch off the system.
2. For safety, unplug the 3-pin power connector from the Monitor.
3. Using the 'T' handled Allen key provided, unscrew the front 4 x M6 screws, one located
at each corner of the Monitor.
4. The front of the Monitor is hinged and the front panel can now be swung open. The
display MP12 PCB v 3.2 can be seen screwed in the lid. There is no need to remove or
unscrew the MP12 PCB v 3.2 from the lid.
5. The Binary switch blocks are located on the back of the MP12 PCB v 3.2. There are a
total of 10 Binary switches.
6. To program the switches for a number of Detector Heads, switch to the positions shown
in the above table. See Part 3-7.
TO ISOLATE A CHANNEL
If a Detector Head becomes faulty and requires changing 'F3' will appear on the display and
the green, amber and red display will flash.
If a Detector Head requires cleaning 'F2' will appear on the display.
If it is not convenient to change the Detector Head or clean the lens, then the display is
obscured by the fault number and the mist reading is not displayed.
As a temporary measure it is possible to isolate the Detector Head from the Monitor panel
('isolate' in this instance is to remove the Detector Head signal from the Monitor via the
software).
To carry out the isolate function, turn key to set mode, place the magnetic pen on 'ISOLATE'
circle, then place it over the 'CHANNEL' number. Turn the key back to RUN mode. The channel/
Detector Head is now isolated and the display will now be blank. If the pen is placed over the
isolated 'CHANNEL' number 'IC' will appear on the display. After the Detector Head has been
replaced and/or the lens cleaned, reinstate the channel by turning the key to set mode, place
the magnetic pen on 'ISOLATE' circle then on to 'RESET'. Finally place the magnetic pen on to
the 'CHANNEL' number, turn key to 'RUN' mode and the channel will be back on line.
When isolating a channel without running the engine, the display may show the channel
number and the letters 'IC' (isolate channel). When the engine is running 'IC' will go from the
display and be replaced by the highest mist concentration.
Running Procedure
EMAIL qmi@oilmist.com WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL +44 (0)20 7328 3121
Engine Oil Mist Detection System
MULTIPLEX
Part3-8 EM6/March 2015