3 Identification
3.1 Marking and type description
This operating manual is for the VISATRON
®
-branded, series VN2020 oil mist detector.
The oil mist detector is available in two device variants:
• VISATRON
®
VN2020, for use in environments that are not potentially explosive
according to ATEX and IECEx
• VISATRON
®
VN2020 EX, for use in environments that are potentially explosive
according to ATEX and IECEx with gas engine running in accordance with
ATEX and IECEx:
ATEX: II (2G) [Ex op is IIB T4 Gb]
IECEx: [Ex op is IIB T4 Gb]
Gaseous fuels, such as biogas, natural gas, landfill gas, mine gas or wood gas as fuel
for engine operation, consist of up to 90% methane gas.
The VISATRON
®
VN2020 EX is designed to draw in gases (mainly methane) from a
potentially explosive atmosphere, for example, from the crankcase of a gas engine.
However, the oil mist detector itself must not be installed in a potentially explosive
environment (classified as II-/2G EX zone) if an EX zone can develop in the measuring
head of the device at the time of detection.
The differences between the VISATRON
®
VN2020 EX and the VN2020 are primarily
indicated by the following external features:
• Inspection cover: Painted in “blue” colour
• Measuring head name plate: EX symbol and EX marking instead of the Schaller
logo
• Name plate of the complete device: Additional EX symbol after the type
designation
3.2 Manufacturer's details
Schaller Automation
Industrielle Automationstechnik GmbH & Co. KG
Industriering 14
66440 Blieskastel/Saarland
Germany
Phone: +49 6842 508-0
Fax: +49 6842 508-260
Email: info@schaller.de
Website: www.schaller-automation.com
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