Introduction - Deckma Hamburg OMD-2008 Series Instruction Manual

1.

Introduction

The OMD-2008 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-2008 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.
OMD-2008 Series generally consist of a Computer Unit, a Measuring Cell, and further
equipment (e.g. Valve Assembly, EV Valve, Automatic Cell Cleaning Device, and EV Flow
Control).
The Computer Units contain the display PCB with the data logger and the terminals for
external connections.
The Measuring Cell is built out of an anodized all-aluminium body with inlet and outlet
block made from stainless steel. This rugged cell contains optics and electronics and is
connected with the Computer Unit via a plugged data cable.
The Measuring Cell should be positioned vertical.
All OMD-2008 units are mounted onto stainless supports and can be mounted on wall or
as bulkhead installation.
The OMD-2008 Series should be located as close as possible to the oily water separator
to minimize response delays. According MEPC.107(49) the layout of the installation
should be arranged so that the overall response time (including the response time of the
15 ppm Bilge Alarm, which is less than 5 sec.) between an effluent discharge from the
15 ppm Bilge Separator exceeding 15 ppm, and the operation of the Automatic Stopping
Device preventing overboard discharge, should be as short as possible and in any case not
more than 20 s.
Mount the OMD-2008 Series instrument by means of M6 or M8 screws on to a rigid
vertical surface or frame and preferably with the display panel of the monitor at user
convenience. For service and maintenance sufficient space to all sides should be available.
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