Deckma 15 ppm Bilge Alarm
Spare Parts Supplier
Deckma Hamburg GmbH makes the OMD bilge alarms that watch the water an oily water separator sends overboard. A request is worked from two labels, the computer unit and the measuring cell, and from the calibration certificate kept on board.
Deckma OMD alarms met behind bilge separators
Deckma Hamburg GmbH is a Hamburg company. Its OMD alarms sample the water leaving an oily water separator, show the oil content and raise an alarm when it passes the set limit. This page covers three types. Each is a computer unit wired to a measuring cell, each carries its own labels, and a part is never chosen from the family name alone.
OMD-24
Two separate items: a computer unit that shows the reading and gives the alarm, and a measuring cell fed with water from the separator outlet. Each has its own label and serial, and the cell can be ordered on its own. As MEPC.107(49) requires, the alarm also records the operating status of the separator, so a gap in the log can sit on the separator side.
OMD-2008
A computer unit with a measuring cell, like the OMD-24. Letters after the number on the label are part of the type and are copied with it, together with the serial of the computer unit and the number of the cell. The label, not the age of the ship, decides what is fitted.
OMD-2005
A Deckma type with three items on the request side: a computer unit with a memory card for the data log, a measuring cell and a valve assembly. Each is identified from its own label before a line is opened.
Measuring cell and calibration certificate
MEPC.107(49) leaves the accuracy check of a 15 ppm bilge alarm to the manufacturer or persons the manufacturer has empowered, and the certificate with the date of the last check stays on board. The same paragraph allows the alarm to be replaced by a calibrated one. Either way the request starts from the cell label and the certificate date.
Deckma Hamburg GmbH
Labels and manuals read Deckma or Deckma Hamburg. Either form of the name is enough to start, together with the alarm type and serial.
What usually puts a Deckma alarm on a request
A bilge alarm seldom wears out the way a pump does. Requests start with a certificate falling due, a reading nobody trusts, or an inspection asking for records the ship cannot show.
Calibration falling due
MEPC.285(70) has the alarm calibrated at intervals of not more than five years, or sooner if the maker's instructions say so, and Lloyd's Register reminds owners that an alarm approved to MEPC.107(49) needs a valid certificate. When the date is close, send the alarm type, the cell label and the certificate date, and ask for the check or a calibrated replacement.
A reading that will not settle
Before the electronics are blamed, say what the display shows, when the cell was last cleaned as the manual describes, and whether sample water reaches the cell. Those answers decide whether the request is for a cell, a unit or a calibration.
A seal found broken
MEPC.107(49) requires a seal to be broken for any access beyond the simple checks made on board. If a seal is found broken, report it as found, with photographs, and leave the reading alone; the route back is a calibration check or a calibrated alarm.
Data log questions at inspection
MEPC.107(49) has the alarm record date, time, alarm status and the operating status of the separator. If the record cannot be shown at inspection, say whether the memory card, the computer unit or the status signal from the separator is in question.
Deckma items that appear on RFQ lines
Grouped by alarm; every line names the alarm type it belongs to and carries the label of the part itself.
- Measuring cells by type and serial, new or as calibrated exchange cells
- Computer units by the full type on the label, letters included
- Valve assemblies on the sample line, where the alarm has one
- Memory cards for the data log of the computer unit
- Cleaning items for the measuring cell, as the manual for the type lists them
- A complete calibrated alarm where replacement is chosen over a calibration check
- Sample line fittings and seals outside the sealed parts
- Calibration checks and calibration certificates through the maker's route
What to send for a Deckma alarm
These items tie the request to one alarm and one calibration before anything is priced:
- Alarm type and serial number from the computer unit label, photographed as they read
- Cell type and cell number from the label on the measuring cell
- Date of the last calibration check, from the calibration certificate held on board
- Software version shown on the display, where the unit shows one
- Make, type and serial of the oily water separator the alarm is fitted to
- The alarm set point in use and what the display reads at the time
- Photographs of the seals as they are, and of the installed alarm
How a Deckma request is worked
Each line is reviewed as a genuine part or a checked alternative and confirmed before the quote. For the measuring cell and the electronics the review stays on the OEM-route.
What the rules ask of the alarm
MEPC.107(49) has the alarm sealed, so that access beyond the simple on-board checks breaks a seal, and leaves accuracy checks to the manufacturer or persons the manufacturer has empowered. MEPC.285(70) and Lloyd's Register's note on IACS UI MPC 127 add a valid calibration certificate. None of them lists spare parts by name; they govern who checks the alarm and who opens it.
OEM-route for cells and electronics
Because calibration stays with the manufacturer's route, measuring cells, computer units, memory cards and the valve assembly are quoted on the OEM-route for the type and number on the label. No cell from another maker, and no repaired cell without a new calibration certificate, is offered in their place.
Checked path for loose items
Sample-line fittings and seals outside the sealed parts can be ordinary catalogue items. Where the owner accepts it, they go on a checked alternative path once size and material are confirmed; the O-ring size finder helps with a seal line.
Deckma bilge alarm parts — questions engineers ask
Can the measuring cell be calibrated or repaired on board?
Not by the crew. MEPC.107(49) leaves accuracy checks to the manufacturer or persons the manufacturer has empowered, and access beyond the simple on-board checks breaks a seal. Send the cell label and the certificate date; the reply says whether a calibration through the maker's route or a calibrated cell or unit fits the alarm.
Our calibration certificate has run out. What do we send?
The alarm type and serial, the cell label, the date on the old certificate and the separator the alarm watches. MEPC.107(49) allows either a fresh calibration check or replacement by a calibrated alarm; say which the ship prefers.
Can a cell from an OMD-24 go into an OMD-2008?
That is never assumed from the family names. The cell label and the computer unit label decide what fits, so copy both exactly, letters included, and the reply confirms the match before anything is quoted.
Can you offer a cheaper cell from another maker?
No. Cells and electronics stay on the OEM-route: only the part for the type and number on the label is quoted. If it cannot be found, the reply says so plainly.
Is the alarm quoted together with the separator?
As separate lines on one request. Name the separator with its own plate as well, because the inserts and the valve set follow the separator while the cell and the computer unit follow the alarm.
Is Vessel Core connected to Deckma?
No, and there is no agreement of any kind. Vessel Core holds no distribution, representation or partnership agreement with Deckma, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Start with the two labels and the certificate
Send the two labels, the certificate date and the plate of the separator the alarm is fitted to. If only part of that is to hand, send what you have.
