Several tests in the past indicate that only this material combination ensures a repeatable low conductivity in balance with longer life time. Constant contamination of silver surface increases the risk of spark erosion due to bad contact. Usually the system must be checked every week for cleanliness. Due to low staff and high work load onboard the Slip ring Cleaning Device continuously prevents increase of the residual potential and keeps PES in safe condition over long time.

The effectiveness of PES must continuously be controlled to keep the propeller protected. The remote indicator displays permanently by a two-coloured display about the present condition of the system.

Main Features

• High efficiency silver tracked basic system
• Remote indicator for permanent supervision
• Patented continuous slip ring cleaning device
• Continuous protection of propeller and bearings at moderate costs

The DPS is available as a add on option to the JOWA 3SEP 15ppm bilge water separator. The unit functions together with the 3SEP’s control system and alarm. The entire DPS unit comes ready installed and pre-wired on the 3SEP’s control panel.

Log functions, IMO Regulalations

• Time and date of discharge
• ppm value
• Alarm status

• GPS position
• Volume of water discharged overboard

The requirements of the MARPOL Convention are that all oil tankers with a gross tonnage of 150 GRT and above must have an oil discharge monitoring and control system installed, incorporating an approved oil content meter, with a starting interlock and an automatic overboard valve control system.

Oil Discharge Monitor consists of the following main parts: A computer unit Intended to be installed in the cargo control room or in an equivalent non-hazardous area. The computer unit controls and receives data from the other ODME components. This information is treated for computing and control purposes and is stored into a flash memory, which could be displayed or printed out an external computer or printer, according to the requirements of the IMO resolutions.

A Zener barrier unit Intended to be installed in the engine room or equivalent safe area. The Zener barrier module converts electrical control signals from the computer unit to pneumatic or electrical supply signals for operation of the components that are a part of the ODME 2005 equipment. The Zener barrier module contains electrical power supply and zener barriers for the analysing unit and for up to two 4-20mA loop powered flow meters.

An Analysing unit Intended to be installed in the hazardous area. The analysing cabinet contains the oil content measuring unit, a sample feed pump of shear type, a fresh water valve for cleaning purposes and a pressure transmitter that monitors the sample flow through the measuring cell. This compact design makes it possible to install the unit close to the sampling point, which make the sampling pipes distance between the sampling probes and the analysing cabinet as short as possible.

Main Features

• Oil content meter is certified to meet the requirements of IMO and MEPC 108(49)
• The measuring range is 0-1000 ppm
• Easy to operate as it is a minimum of buttons to press and self explanatory menus
• Robust, easy to install and easy to maintain
• A unique self-cleaning feature, making manual cleaning virtually unnecessary.
• A high quality product. The components are designed for obtaining long lifetime in a rough environment

The log data are stored internally for a minimum of 18 month. This data can at any time be down loaded for overview on a PC via RS232. The data can also be down loaded direct to a printer (option) via RS232. The WDM is equipped with a display for overview, information, status indication and adjustments.

Main Features

• GPS position
• Time and date of discharge
• Volume of water discharge overboard
• ppm value
• Alarm status

LOG FUNCTIONS

• Time and date of discharge
• ppm value
• Alarm status

The log data is stored internally for a minimum of 18 months in the Oil content meter.

The CWM is equipped with a display window for overview, information, status indication and adjustments.