Operating manual for the VISATRON VN2020
V2.0 12/2021 EN
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15
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SCHALLER AUTOMATION
66440 Blieskastel / Saarland / Germany / Industriering 14 / P.O. Box 1280
Industrielle Automationstechnik GmbH & Co. KG
T
el. +49(0)6842-508
-
0
/ Fax -260 / Email: [email protected] /
www.schaller-automation.com
The oil mist detector complies with classification II (2G) [Ex op is IIB T4 Gb].
*The brackets indicate that the device is installed outside the hazardous area () but emits optical radiation into
a hazard zone [ ].
Both devices are equipped with a measuring head (3), which includes an optical measuring
track under the inspection cover (4) and an LED display (9) to display all the important
information for the user under normal operating conditions. The measuring head (3) is attached
to the base plate (1) via a vibration-protected mounting plate.
Oil mist containing crankcase atmosphere is drawn out of the crankcases via the engine wall
screw fittings by the negative pressure generated in the unit. The oil mist enters the measuring
head via the header pipes. This is where the oil mist concentration is then measured in the
optical measuring track. The oil mist is then returned to the crankcase via the exhaust line.
The negative pressure for the suction system is generated by an air jet pump (6), which
operates on the Venturi principle. The electrical power supply is provided in a terminal box
(11).
Equipment Protection Level
Temperature Class (Maximum Surface Temperature) T4=135°
Gas Group-Ethylene (Classified according to the ignitability)
Protection Concept: Intrinsically safe Optical Radiation
Explosion protection symbol
Type of explosive atmosphere (G=Gas)
Equipment Category (Category 2, High protection, one fault)
Equipment Group (II: non-mining)
EU Explosive Atmosphere Symbol
+5°≤+70°C
