Schaller Automation VN 115/87 EMC, Руководство пользователя, Страница: 12 / 40

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Wire break resistance for oil mist alarm
Important information:
All Visatron oil mist detectors are equipped with wire break resistance
for oil mist alarm. The wire break resistance is a set resistance value
for the oil mist alarm and are connected between pin 7 & 8 and pin 15
& 16. It is important to make sure that the wire break resistance is
correct according to the required resistance for the alarm shut down
function of the engine. If the value is not correct according to required
wire break resistance value (at the alarm shut down panel)
– this may
lead to a situation where you get no shut down or reduced RPM of
the engine during a real high oil mist level alarm!
If you are replacing the complete oil mist detector or a measuring
head with for example an exchange unit
– you always need to check
the documented wi
re break resistance on the “old” device. When you have this information, you need to check that it is the
same wire break resistance value on the new device before starting up the engine. If the wire break resistance is different
between the devices, you can transfer the wire break resistance (2 pc. presented on the backside of the electronic module
placed in the measuring head) from the “old” device to the new device. Always make a proper test of your system when
replacing measuring head or complete oil mist detector!
Wire break resistance for VN/87 EMC