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3.5.1 Limited Adjustment Alarm Set Point
By request units with alarm set point of 5 ppm max. are available. (For more information,
read section 19.
3.6
Active Current Interface
The active current interface represents a combination of measurements and
interpretations. The active current interface is adjustable to 0 to 20 mA or to 4 to 20 mA.
This complies the oil content from 0 to 30 ppm. In case of malfunction e.g. "EE" means
20 mA.
The maximum open-load voltage is about 5 V and it is strongly recommended not to
burden 150 Ω external load.
3.7
Inputs
The unit also has four active inputs, which can be used separately as well.
a) Separator Input is dedicated to be used according the MEPC.107 (49).
b) Reserve Input reserved for future use.
c) Optionally there is an active input for external flow switch (FLOW). The Unit will
be in alarm condition, whenever Terminals are opened/ disconnected. Normally
this input is delivered with a link.
d) An Input for fresh water switchover for units with an Electric Valve is available.
3.8
EV (Electric clean water Valve)
The OMD-24 EV is designed with an Electric Switchover Valve to switch the instrument
from the sample stream to supply of clean, oil free water. Whenever fresh water is
allowed to flow to the Measuring Cell, the OMD-24 EV will switch over to alarm condition
as required by MEPC.107(49), and it will also continue to display the measurement result.
The OMD-24 EV setup replaces the manual valve setup for the standard OMD-24, and also
allows remote flushing.
OMD-24 Series with 5 ppm Alarm Set Point).
Page: 14
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