Operating manual VISATRON® Oil Mist Detector VN2020 / VN2020 EX
Part number 183001 Version 3.0
8.8 “Oil mist alarm” status indicator
Risk of death
There is a risk of serious injury, including death, due to explosion in the crankcase as a
result of incorrect installation.
In the event of an oil mist alarm, do not approach the engine again until the
alarm threshold on the oil mist detector or the remote indicator has fallen
again.
The manufacturer recommends that only approach the engine again when the
alarm threshold has dropped to 0% relative oil mist concentration.
If a Remote Indicator II is used for remote monitoring, it must be used to
continuously check the current oil mist concentration.
Familiarise yourself with the basic safety instructions before starting to operate
the device.
Section 2.4 Basic safety instructions
If the oil mist detector is operated in explosion-proof areas, the relevant safety
instructions must be observed.
Section 2.4.1 Safety instructions for potentially
explosive atmospheres
Action in the event of an oil mist alarm
The oil mist alarm message must be confirmed by pressing the oil mist alarm
confirmation button on the measuring head of the VISATRON® VN2020.
The relative oil mist concentration (opacity) is displayed on the LED level
display on the right.
In the event of damage to the main or big end bearing, it can be assumed that the
relative oil mist concentration will reach the defined alarm threshold in a very short time.
Example use case:
• The oil mist alarm is triggered at a relative oil mist concentration ≥ 100%, as
shown in the figure below. In this case, the “Alarm level 100” LED on the LED
bar display (right) turns red. []
• At the same time, the “Oil Mist Alarm” LED (top left) starts to flash red. []
• The “System ready” LED [] stays green.
• If the opacity subsequently decreases, the alarm status is saved.
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