Operation Manual VISATRON® VN115/87plus EX 06/2016
Page 11
SCHALLER AUTOMATION D-66440 Blieskastel / Saarland / Germany / Industriering 14 / P.O Box 1280
Industrielle Automationstechnik GmbH & Co. KG Tel. +49(0)6842-508-0 / Fax -260 / eMail: info@schaller.de / www.schaller.de
The negative pressure for the suction system is generated by an air jet pump (1)
working with the Venturi principle. The electrical interface is integrated within a
socket housing (5). The mating plug contains the Oil-Mist-Alarm button. The device
can be connected directly to the engine safety system. The interface includes two
Oil-Mist-Alarm outputs, a Pre-Alarm output and a Ready signal.
VN115/87plus EX
Figure 1: VISATRON® VN115/87plus EX
VN115/87plus EX
The suction system is connected to the common "Connecting Box" (4). This type of
oil mist detector is able to detect an oil mist development, without identifying the
location of the oil mist source inside the engine.
In normal operation mode the VN115/87plus EX samples the atmosphere of the
engine at all suction points in parallel through the suction system to the measuring
head.
The VN115/87plus EX offers two alarm levels.
The Main-Alarm level can be adjusted with a switch at the rear side of the
measuring head.
The Pre-Alarm will be activated at fix 70% of the Main-Alarm level.
To keep the optical track clean, the VN115/87plus EX use clean scavenging air in
front of the filter glasses. This air is derived from the compressed air driving the air
jet pump.
The device is integrated in a mounting unit. The scope of supply includes an air
cleaner, an additional pressure regulator unit and a protection cover.
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