Quality Monitoring Instruments QMI MULTIPLEX Manual page 46

OPERATION
Oil mist is continuously drawn through each Detector by a fan which we insist must be kept
running at all times so that the oil mist level can be monitored even if the engine is not
operating. This process is continuous at each Detector Head. The signals are fed to the micro-
processor which is located in the CMU.
The signals are scanned at 500 millisecond intervals and the data is presented as a digital
display reading from 0% to 100% of alarm level.
Although oil mist samples are measured in milligrams/L the reading per channel is presented as
a percentage of the alarm setting.
ALARM OPERATING RANGES
Using Binary switch 5 on the Main Processor Board MP12 v 3.2.
Switch 5 is for setting the maximum alarm setting allowed.
With Binary switch 5 set to OFF the range is from 0 up to 1.30mg/L.
With Binary switch 5 set to ON, the range is from 0 up to 2.00mg/L.
The 1.30mg/L maximum alarm setting is normally used on 2 stroke slow speed engines,
however some times you may need to use the 2.00mg/L setting.
The 2.00mg/L maximum alarm setting is used on medium and high speed engines.
RELAY AND LED FUNCTION
Relays activated
OPERATING RANGES
0 - 1.30mg/L
0 - 2.00mg/L
as a percentage of the alarm setting.
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
% Alarm Level
0% to 79%
80% to 99%
100%
80%
100%
Part3-2
Lights Displayed
green
amber flashing
red flashing
early warning alarm
main alarm and engine slow or
Shutdown
EM6/March 2015