8.6 Checking the supply pressure, sensor OMC and sensitivity
To carry out these checks, please see the following sections in this manual:
Section 6.5.3 Setting the negative pressure at the measuring head of the VN2020 / VN2020 EX
Section 6.5.4 Setting the sensitivity on the VN2020 / VN2020 EX oil mist detector
The sensitivity check and supply pressure check have been
completed successfully!
8.7 “Oil mist pre-alarm” status indicator
When high relative oil mist concentrations are reached, the LED bar display [] comes
or the LED display increases steadily.
Example use case:
At a relative oil mist concentration of 70%, the pre-alarm relay is activated and the pre-
alarm is triggered. As shown in the figure below, the “Oil Mist Alarm” LED [] comes on
red and the “70” LED [] on the bar display comes on orange.
The “System ready” LED [] stays green.
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