Deckma Hamburg OMD-2008 User manual

INSTRUCTION MANUAL
15ppm Bilge Alarm
OMD-2008
Versions with
Electric Valve (EV)
Flow Control (FC)
Manual Cleaning Unit (MCU)
DECKMA HAMBURG GmbH
Kieler Straße 316, D-22525 Hamburg - Germany
Tel.: [phone], Fax: [phone]
Internet: www.deckma.com eMail: [email protected]
MOTEC
Marine & Offshore Technology

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 1 of 28
IMPORTANT NOTICE
Replacement components for 15ppm Bilge Alarms.
General
All monitors in our range are inspected and tested to the related I.M.O. requirements at
our factories prior to delivery.
In normal use the units should operate correctly and without fault over a long period of
time requiring only small amounts of maintenance to be carried out as outlined in the
instruction manuals.
Service Exchange Units
In the event of a monitor malfunction due to electrical or electronic component failure it
is our recommendation that a service exchange unit be ordered.
The defective instrument should be returned to our works within 30 days of supplying
the service exchange unit, then only the repair charge is payable. Otherwise the whole
cost of a service exchange unit becomes payable.
This procedure is by far the easiest and most cost effective way of ensuring the monitor
on board conforms to I.M.O. resolution MEPC.107(49).
Remark:
According the MEPC.107(49) § 4.2.11 the unit has to be checked at IOPP Certificate
renewal survey by the manufacturer or persons authorized by the manufacturer.
Alternatively the unit may be replaced by a calibrated 15 ppm Bilge Alarm.
The OMD-2008 EVFC is designed in that way, that only the measuring cell needs to be
changed, as this unit carries the Calibration Certificate. The Calibration Certificate with
the date of the last calibration check should be retained onboard for inspection
purposes.
If for some reasons the computer unit needs to be changed, it has to make sure, that
the memory card will remain on board for at least 18 month. The new computer unit will
carry its own memory card. The old card can be insert into the new unit only for reading.
Writing is only possible with the card delivered with the new computer unit. For details
see section 13.1.
Warranty
Our warranty terms are12 months after installation but maximum 18 months after
delivery ex works. The maker undertakes to remedy any defect resulting from faulty
materials of workmanship except wearing parts.
The maker's obligation is limited to the repairs or replacement of such defective parts by
his own plant or one of his authorized service stations.
The purchaser shall bear the cost and risk of transport of defective parts and repaired
parts supplied in replacement of such defective parts.
ANY DISMANTLING OR BREAKING OF A SEAL WILL VOID THE WARRANTY

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 2 of 28
SECTION
TITLE
PAGE
1
Introduction
3
2
Important Notes
3
3
Principle of Operation
4
3.1
Measuring Principle
4
3.2
Features
4
3.3
Adjustment
4
3.4
Displays and Alarms
4
3.5
FC (Flow Control)
5
3.6
EV (Electric clean water Valve)
5
3.7
MCU (Manual Cleaning Unit)
5
4
Specification
6
5
Construction
7
6
Installation
8
7
Piping
10
8
Wiring
11
8.1
Typical Control System
13
9
Power Supply
13
10
Commissioning
14
10.1
Electrical and Piping
14
10.2
Flow Rate Adjustment
14
10.3
Functional Tests
15
10.4
Programming Mode
16
11
Operating Instructions
20
11.1
Operator Notes
20
12
Operator Maintenance
22
12.1
Manual Cell Clean Unit
21
Important Information: Cleaning of Glass Tube
23
13
Fault Finding
24
13.1
Memory Card
25
14
Calibration
25
14.1
Calibration and Repeatability Check
26
14.2
Function Test at Classification Survey
and Port State Control
26
15
Spare Parts
27
15.1
Recommended On Board Spares
27
16
Remarks
28

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 3 of 28
1 Introduction
The OMD-2008 EV-FC Bilge Alarm Unit has been designed specifically for use in
conjunction with 15 ppm oil-water separator units and has a specification and
performance which exceeds the requirements of the International Maritime
Organization specifications for 15ppm Bilge Alarms contained in Resolution
MEPC. 107 (49).
The unit is supplied with 2 works-adjusted alarms at 15 ppm. Other set points
(10 ppm or 5 ppm) are possible and can be adjusted on site at any time by using
the buttons at the front panel.
Instruments with maximum Alarm set-points of 10 ppm or 5 ppm respectively are
available.
If an alarm set point is exceed, the alarms are visible at the front panel and the
appropriate relays are switched. In case of malfunction the System 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 (equal to 0 - 30 ppm) signal output is available for driving a
recorder or external meter.
The OMD-2008 EV-FC is be equipped with an electric switchover valve for clean
water usage and a Flow Sensor. A Manual Cleaning Unit is available as an
option (MCU). Different instrument versions are covered in this document. Please
verify instrument version on site and refer to the relevant sections of this manual.
2 Important Notes
a) This equipment must be installed and operated in strict accordance with the
instructions contained in this manual. Failure to do so will impair the protection
provided.
b) Installation and servicing must be undertaken by a competent and suitable
skilled person.
c) The equipment must be connected to the ground according relevant
requirements.
d) The unit must be isolated from the electrical supply before any maintenance of
the equipment is attempted.
e) All National or local codes of practice or regulations must be observed and,
where applicable, are deemed to take precedence over any directive or
information contained in this manual.
f) In case of freezing conditions the measuring cell should be emptied
completely.

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 4 of 28
3 Principle of operation
3.1 Measuring Principle
An optical sensor array measures a combination of light scattered and absorbed
by oil droplets in the sample stream. The sensor signals are processed by a
microprocessor to produce linearized output.
If an alarm (works set point 15 ppm, or 10 ppm or 5 ppm respectively) occurs, the
two oil alarm relays are activated after the adjusted time delay.
The microprocessor continuously monitors the condition of the sensor
components and associated electronics to ensure that calibration accuracy is
maintained over time and extremes of environmental conditions.
3.2 Features
Robust construction
Solid suppression capability
Low maintenance
Easy installation
Constant readiness
Low spare part stock holding
Works adjustment
Easy settings via menu
3.3 Adjustment
The unit is delivered with a works calibration according the IMO-requirements.
The alarm points are set to 15 ppm (or 10 ppm, or 5 ppm for certain versions).
The "Zero" point is also works calibrated and can be re-adjusted on site by using
the programming mode and clean water. See Section 10.4 “Settings-Offset”. A
calibration is not permitted. This has to be done according IMO Regulations by
the manufacturer or persons authorized by the manufacturer.
3.4 Displays and Alarms
In the unit there are two independent oil alarm circuits available. Both can be set
separately from 1 to 15 ppm. From the manufacturing both alarms are set to
15 ppm (according IMO). The set points can be changed according to the
requirements on site, for example to 10 ppm or 5 ppm. An alarm point setting
above 15 ppm is not possible. The adjustment can be done in the programming
mode as described in Section 10.4.

DECKMA HAMBURG GmbH
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In this mode also the individual adjustment of the time delays for the alarms can
be done.
Both alarm circuits are also related to an alarm LED on the front panel.
In case of malfunction the “System” LED will indicate any type of internal fault of
the unit. This LED is flashing green in normal conditions and is red in alarm
conditions.
Additional to the alarm LEDs each alarm circuit is equipped with a relay with
potential free alarm contacts. These contacts can be used for external processing
of the signal or for control of further functions.
If a malfunction or failure of the power supply occurs, all three relays (both alarm
relays and the SYSTEMFAULT relay) will switch to alarm condition.
3.5 FC (Flow Control)
OMD-2008 EV-FC instruments are equipped with a Flow Sensor. The Flow
Sensor is connected in the Drain line of the Measuring Cell. If the flow rate
through the Measuring Cell is too low, or if the sample is not flowing at all, the
Instrument will go to Alarm condition and issue a “Status: Flow?” message.
3.6 EV (Electric clean water Valve)
OMD-2008 EV instruments are equipped with an electric switchover valve for the
clean water stream. The valve can be controlled via the menues, or remotely
using the control input.
3.7 MCU (Manual Cleaning Unit)
Optionally the instruments can be fitted with a Manual Cleaning Unit. The Manual
Cleaning Unit allows to clean the sample glass tube without opening the
Measuring Cell Head Screw, and without interrupting the normal sample flow.
Maintenance is made easier with the MCU. Please note that operating the MCU
may set the instrument to alarm condition for a few seconds.

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 6 of 28
4 Specification OMD-2008 EV FC
Range:
0 –30 ppm, Trend indication 50ppm
Accuracy
According IMO MEPC. 107(49)
Linearity
Up to 30 ppm better than ± 2 %
Display
Yellow Graphic Display
Power Supply:
24 V - 240V AC or DC
Automatic Voltage selection
Consumption:
< 10 VA
Alarm Points 1 + 2:
Adjustable between 1 - 15 ppm
(Works adjustment 15 ppm)
Alarm 1 Operating Delay:
(for annunciation purpose)
Adjustable between 1 –540 sec.
(Works adjustment 2 sec)
Alarm 2 Operating Delay:
(for control purposes)
Adjustable between 1 –10 sec.
(Works adjustment 10 sec)
System Fault Alarm:
Red LED
Alarm Contact Rating:
Potential free 1 pole change over contacts,
3 A / 240 V
Alarm Indication:
Red LEDs
Output Signal:
0 –20 mA or 4 –20 selectable
ext. Load < 150 
Sample Water Pressure:
0,1 –10 bar
Sample Flow:
Approx. 0,1 - 3 l/min depending on pressure
Ambient Temperature:
+ 1 to + 55° C
Sample Water Temperature:
+ 1 to + 65° C
Roll:
Up to 45°
Size (Computer Unit)
200 mm W x 200 mm H x 100 mm D
Size (EV-FC-Arrangement)
150 mm W x 290 mm H x 140 mm D
Degree of Protection:
IP 65
Weight:
5,9 kg
Pipe Connections:
for 6mm OD Cu or SS pipe
Technical specifications are subject to change without notification

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 7 of 28
5 Construction
OMD-2008 EV-FC consists of two main components:
The computer unit contains the display PCB with the data logger and the
terminals for external connections.
The measuring cell is built out of an all-aluminium, nickel plated body with inlet
and outlet block from stainless steel. It contains optics and electronics and is
connected with the computer unit via a plugged data cable. It is mounted onto a
stainless steel support that also holds the valve assembly and the Flow Sensor.
An electric valve controls sample water and clean water usage.
The OMD-2008 EV-FC can easily be mounted in wall or bulkhead installation.
1
Computer Unit
4
Flow Sensor
2
Measuring Cell
5
Clean Water Valve EV
3
Manual Cleaning Unit
(MCU) (Option)
Fig. 1

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 8 of 28
6 INSTALLATION (REFER TO FIG. 2AND FIG. 3)
See Section 2 for important notes concerning installation.
The OMD-2008 EV-FC Monitor 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 s.)
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 EV-FC Computer Unit by means of M6 or M8 screws on to
a rigid vertical surface and preferably with the display panel of the monitor at eye
level. For service and maintenance sufficient space to all sides should be
available.
Fig. 2a: Dimensions of Computer Unit
Computer Unit and Measuring Cell assembly should be mounted close to each
other.

DECKMA HAMBURG GmbH
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Fig. 2b Dimensions of Measuring Cell assembly
Pipe connections are prepared for 6mm OD stainless steel or coper pipes.
Adapter fittings for other pipe diameters are available upon request. Working
space for maintenance and operation is recommended in front of and above the
instrument.
Care must be taken at mounting of the pipes connections to avoid any torsion of
the housing and damage of the instrument.

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 10 of 28
7 Piping (REFER TO FIG. 3)
Connect the OMD-2008 EV-FC Monitor to the sample point of the oily-water
separator outlet and to a source of oil free water. Fittings on the Instrument are
for 6 mm OD copper or stainless steel pipe. Adapter fittings for other pipe
diameters are available upon request.
The sample point should be located on a vertical section of the separator outflow
piping to minimize the effects of any entrained air. The tapping point should be at
a level above the outlet of the monitor to ensure the sample cell is flooded at all
times.
If connection to a vertical section of the separator outlet piping is impractical, the
tapping may be made into the side of the horizontal pipe. Avoid top or bottom
entry.
For separator discharge pipes up to 75 mm OD a standard "T"-type junction of
the welded or screwed type is satisfactory for the tapping point. For the separator
discharge pipes of 80 mm OD and above a sample probe should be employed
which protrudes into the discharge piping by approx. 25 % of the ID of the pipe.
Fig. 3

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 11 of 28
8 Wiring (REFER TO FIG. 4 + 5)
See Section 2 for important notes concerning wiring.
This unit must be connected to the mains supply via a suitable rated and
approved fused isolator unless such fusing / isolation is provided by associated
equipment. When fitted, the isolator should be close, readily accessible and
marked as to function.
Electrical connections are made through the metric cable gland openings
prepared underneath the instrument. Not all openings may be free.
Fig. 4
Precise wiring details will vary dependent upon the control system to be
employed but the most frequently used systems employ alarm relay 1 for alarm
only and alarm relay 2 for control purposes.
Electrical connections are made to the terminal blocks inside the computer
housing. Wires are connected to the terminals by pushing a suitable screwdriver
into the clamp holes to release the internal spring loaded clamps. After the wire is
inserted to the terminal and the screwdriver is removed, the wire is fixed.
If the instrument is operated at high voltages, additional care has to be taken to
provide reliable ground connections. Ground (PE) can be connected direct to the
terminal or, if this is not sufficient according local rules, to the computer housing
(PE bolt inside, right side).
The instrument provides a pilot voltage output at Terminals 3&4. This is internally
connected to the power supply input (Terminals 1&2 via Fuse T2A). The pilot
voltage can be used to supply additional external circuitry, e.g. alarm lamps or
electrical valves.

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 12 of 28
Please note: any device connected to the pilot voltage output must be rated for
the voltage the instrument is supplied with. Do not use the pilot voltage for driving
motors, heaters or other high load devices. The pilot voltage is intended for alarm
purposes only.
Fig. 5: Connection Example
Close front cover completely after electrical installation. Water inside the
instrument may result in corrosion and malfunction. Alarm contacts description is
in alarm (non-energized) condition.
Note: In case the OMD-2008 EV-FC is installed as replacement to a
MEPC.60(33) approved separator and no “Status Separator” signal is available, a
link across terminal 11 + 12 can be installed. Alternatively a “Status Separator”
signal can be generated from the Separator control, and an auxiliary relay be
operated with this signal. The Contacts of this relay then can operate the
“STATUS” input. Please refer to the Separator manual, or contact the separator
maker for information regarding the separator.

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 13 of 28
8.1 Typical Control System
The installation on site has to make sure that in case of any loss of power supply
and/or loss of air supply for the automatic stopping device the overboard
discharge valve close the overboard line and open the re-circulating line.
The system showed in the example, employs alarm relay 2 to control a
pneumatic solenoid valve which energises or de-energises a pneumatically
operated 3 - way valve as depicted in Fig. 5.
The separation process will continue until such time as the pollution level falls
below the alarm set point at which time the discharge will be directed overboard.
A pump stop system is according MEPC.107 (49) not allowed.
8.2 Remote EV Electric Valve control
It is possible to remotely control the EV valve. Connect a switch to Terminals
19&20. If the Terminals are connected (linked trough the switch) the EV valve will
switch to clean water. If the Terminals are open/disconnected, the EV valve will
switch to sample stream.
9 Power Supply
See Section 2 for important notes.
The unit is designed for a power supply of 24 V to 240 V AC or DC. It has an
automatic voltage selection. The power supply must have a fuse rated no more
then 2A.

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 14 of 28
10 Commissioning
See Section 2 for important notes.
On completion of the installation, wiring and piping carry out the following checks:
10.1 Electrical and Piping
a) Check that the power supply is connected to the terminals 1 + 2 of the
terminal block.
b) Check that the wiring of the automatic stopping device (back-to-bilge valve)
and to the alarm system is according the IMO Requirements.
c) Check that the grounding (PE) has been made according to the relevant
regulations.
d) Check all piping connections for leaks and rectify as appropriate
10.2 Flow rate adjustment
a) Run oil free water through the instrument to purge the system. Measure the
amount of water flowing through the instrument per Minute. Flow rate for both
smaple stream and clean water stream should be approx. 2 Liters per Minute.
b) On OMD-2008 EV-FC instruments adjust the flow rate through the unit by
using the small O-Rings in the cell cap.
NB: The flow rate should be checked on both, the clean water supply and the separator sample
supply. If the clean water supply is obtained from a high pressure source, the flow rate will be
higher than from the sample point.
HIGH FLOW
MEDIUM FLOW
LOW FLOW
O-Ring 4.5x2 inside O-Ring 8.5x2 outside Main O-Ring 11.5x3 always present

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 15 of 28
The flow rate adjustment is important for the time delay between the sample
point and the monitor. If the sample flow rate is too small, the instrument will
be in Alarm and display “Status: Flow”.
On instruments fitted with Manual Cleaning Unit
(OMD-2008 EV-FC MCU), sample a higher or a
lower flow rate can be adjusted. To get the
higher flow rate, remove the smaller O-Ring
(9.5x2) from the Manual Cleaning Unit.
MCU
(Manual Cleaning Unit)
10.3 Functional Tests
a) Run oil free water through the instrument to purge the system
b) Verify that the water is flowing with the proper flow rate trough the instrument.
c) Switch on the instrument and make sure, that the Power LED is illuminated
and the display is
showing the
initializing display for
about 15 sec. After
that time it will
change to the
standard display, showing the actual measurement.
d) Switch the Electric Valve to clean water. While oil free water is running
through the monitor check the Zero adjustment. The display should be "0" to
“2” and the status will show “FW”. If the display varies by greater amounts, it
may be that air entrainment is present. If this is the case, the cause must be
located and rectified.
f) If the Zero need to be adjusted, this can be done in the programming mode as
described in section 10.4. (Settings –Offset)
g) If the flow rate is not sufficient, the instrument will display “Status: Flow”. Both
sample flow rate and clean water flow rate are recommended to be approx.
2 Liters per Minute.
h) Switch the electric Valve (EV) back to sample stream.

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 16 of 28
10.4 Programming Mode
There are 3 groups of push buttons to
control the functions of the display.
Navigation buttons are in group 1.
Functional buttons are group 2. Group 3 is
for data logger operation.
In the programming mode the alarm set
points, the time delays, and the offsets can
be modified. It is also possible to reset to
the factory default values at any time.
The clock is factory set for GMT,
Greenwich Mean Time, and cannot be
changed.
Initial Display.
Will disappear a few seconds
after power up.
Normal Operation Display.
Pressing the button will display
additional information.
Pressing the button will
display more detailed information
about the current status.
Exit from SYSTEM-info menu
by pressing the ESC button.
Refer to Fault finding table in
manual for explanations of
status information.
O K
+
TEST SET
ESC
OK
+
-
LOG
OMD-2008
AL1 AL2 SYSON
1
2
3

DECKMA HAMBURG GmbH
Issue: 08.07.2015 Instruction Manual OMD-2008 (EV, FC, MCU Versions) Page 17 of 28
Pressing the AL1 button leads
into SETTINGS menu, Alarm1
settings preselected.
Pressing the Al2 button leads
into SETTINGS menu, Alarm2
settings preselected.
Pressing the SET button from
Normal Operations Display leads
into SETTINGS menu, set
default option preselected.
At the SETTINGS menu the
alarms, time delays, the Offset
and optionally the output signal
can be modified within the
limitations. Select the required
point by using the „+“ or „-„
button. To modify settings press
the button.
To change the value, press
the “+” or “-“ button. Confirm
with “OK”.
To change the value, press
the “+” or “-“ button. Confirm
with “OK”.
To change the value, press
the “+” or “-“ button. Confirm
with “OK”.
At the SETTINGS menu the all
settings can be reset to the
factory default values. To reset to
factory values once again press
the button.
To change to “yes”, press the
“+” button. Confirm with “OK”
to reset all settings to the
factory default settings.
AL1
SET
AL2
SET
SET

DECKMA HAMBURG GmbH
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Pressing the SYS button directly
leads into SYSTEM menu.
Select if you want information
about the instrument or
information about the measuring
cell.
Exit from SYSTEM-info menu
by pressing the ESC button.
Exit from
MEASURING CELL menu by
pressing the ESC button.
Pressing the ON button directly
leads into the
SYSTEM-OPTIONS menu.
Select if you want to activate the
clean water valve or if additional
information should be displayed.
To change to “ON”, press the
“+” button. Confirm with “OK”
to activate the optional clean
water valve for a limited time.
Flow rate and status of the
meter is displayed. Exit from
Flow display by pressing the
ESC button.
SYS
ON

DECKMA HAMBURG GmbH
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Pressing the TEST button
directly leads into the
SYSTEM-TESTS menu.
Select if you want to activate the
Alarms Test or if Desiccator
status information should be
displayed.
Wait until Alarms Test is
completed, as indicated by
countdown value and
progress bar.
Exit from information
Desiccator status display by
pressing the ESC button.
The LOG button leads into the
data logger function.
Initially the data logger displays
the live data. With the
button it can be switched to the
graphical display mode.
By pressing the LOG button
twice the recorded data display
mode is invoked.
The data logger displays
recorded data. With the
button it can be switched to the
non-graphical display mode.
The data logger displays
recorded data. With the
button it can be switched to
the graphical display mode.
In both data display modes the arrow buttons can be used to
navigate to another date/time of recorded data.
TEST
LOG
LOG
LOG
LOG
LOG
LOG