Operating manual VISATRON® Oil Mist Detector VN2020 / VN2020 EX
Part number 183001 Version 3.0
The pipe siphon has the task of draining the precipitated oil in the header pipes before it
completely closes or constricts the header pipes.
As already described in detail in Section 4.3.5, precipitated oil can permanently block
the header pipes and thereby prevent the test medium from being taken in continuously.
4.3.9 Remote Indicator II for VISATRON
®
VN2020 / VN2020 EX (optional)
It is recommended that the VISATRON
®
VN2020 / VN2020 EX system is used with a
remote monitoring system (the Remote Indicator II) to monitor the oil mist
concentration and the status of the VISATRON
®
VN2020 / VN2020 EX system from a
safe location in accordance with IACS UR M10.
Remote monitoring system (Remote Indicator II) for VISATRON
®
systems (optional)
4.3.10 Setting the device sensitivity
The VISATRON® VN2020 / VN2020 EX system determines the oil mist concentration
using an optical measuring track in the measuring head of the device. The values are
calculated as the percentage for “opacity”. 100% opacity means that no light penetrates
through the oil mist sample. This is equivalent to the light hitting a white (= opaque)
surface.
IACS UR M67, requires an oil mist alarm at 5% of the lower explosive limit (LEL).
The LEL corresponds to an oil mist concentration of 47 mg/l in the air at a temperature
of 25°C. This means that the oil mist detector must output an oil mist alarm at approx.
2.5 mg/l.
The sensitivity is set at the device via a USB connection with the measuring head. This
procedure is described in detail in Section 7.1
Section 7.1 Parameter settings, VISATRON®
VN2020 / VN2020 EX
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