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1. Introduction
The OMD-24 Series Bilge Alarm Units have been designed specifically for use in
conjunction with 15 ppm oil-water separator units and have a specification and
performance which exceeds the requirements of the International Maritime Organization
IMO specifications for 15 ppm Bilge Alarms contained in Resolution MEPC.107 (49).
The units are supplied with 2 works-adjusted alarms at 15 ppm. Set points from 1 ppm to
15 ppm are possible and can be adjusted on site at any time by using the buttons at the
front panel.
If an alarm set point is exceeded, the alarms are visible at the front panel and the
appropriate relays are switched. In case of malfunction the “SYS LED” at the front panel
will change from blinking green to permanent red.
For the data logging function, the unit requires a status input from the separator.
A 0(4) - 20 mA signal output (equal to 0 - 30 ppm) is available for driving a recorder or
external meter.
By request the OMD-24 Series are also available with 5 ppm alarm set point. Additionally,
instrument versions equipped with a Measuring Cell Cleaning Unit or an Automatic Cell
Cleaning Device are available.
1.1 OMD-24
The OMD-24 is the basic version of the OMD-24 Series. It is equipped with a Clean Water
Handle and a Sample Handle to switch from sample stream to clean water.
1.2 OMD-24 EV
The OMD-24 EV is designed with an Electric Switchover Valve to switch the instrument
from sample stream to supply of clean, oil free water. The instrument will switch over to
alarm condition, but will also continue to display the measurement result. The Electric
Switchover Valve also allows remote flushing.
1.3 OMD-24 EVA
The OMD-24 EVA is fitted with an Electric Switchover Valve and an Automatic Cell
Cleaning Device.
1.4 OMD-24 A
The OMD-24 A is prepared with an Automatic Cell Cleaning Device for Auto Clean
operation.
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