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 Part3-2
OPERATION
A sample of air is continuously drawn through each Atmospheric Sensor and the level
of oil mist density is monitored. This process is continuous at each Sensor. 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 mg/L the reading per channel is presented as
a percentage of the alarm setting.
RELAY AND LED CHART
% Alarm Level Lights Displayed
0% to 79% green
80% to 99% amber flashing
100%
red flashing
Relays activated 80% early warning alarm
100% alarm and plant shutdown
OPERATING RANGES
0 - 1.30mg/L
0 - 2.00mg/L
as a percentage of the alarm setting.
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