Introduction; Construction; Operation; Caution - BRANNSTROM BilgMon488 Instruction Manual

3 I
NTRODUCTION
The BilgMon488 bilge alarm has been designed specifically for use in conjunction with 15 ppm oil-
water separator units. BilgMon488 performance meets the requirements of the International
Maritime Organisation specifications for 15 ppm bilge alarms contained in resolution MEPC. 107(49).
BilgMon488 is equipped with 2 adjustable alarms that are triggered when the oil-content of the
processed sample exceeds the set limit (1 – 15 ppm, works-adjusted to 15ppm). Alarm outputs
consist of relays and indicator LEDs. Additionally a 0(4) – 20 mA current output signal (corresponding
to 0 – 30 ppm) is available to enable remote surveillance and recording of oil contents.
Downloading the operating log of BilgMon488 can be done through a USB-interface. This requires
driver software and cables that can be supplied on demand.
4 C
ONSTRUCTION
BilgMon488 consists of two main parts, the MASTER unit (housing with LCD, buttons and LEDs) and
the SENSOR unit (housing with pipe fittings).
The MASTER unit contains all the electronics used for control and data storage of the bilge alarm.
Mounted in the lid of the MASTER housing is the main memory containing the bilgealarm log.
The SENSOR unit contains electronics for measuring the sample stream. The SENSOR unit also holds
the measurement calibration data. Communication with the MASTER unit is done wireless hence the
SENSOR unit is hermetically sealed and shall not be opened.
5 O
PERATION
Optical sensors monitors the amount of light scattered and absorbed by the oil droplets in the
sample stream. Sensor signals are processed by a microprocessor to produce a corresponding oil
content (ppm) output. The output is communicated to the MASTER unit where it is processed. The
MASTER unit takes action, such as alarm activation, logging etc., depending on the oil content and
the separator signal.
Settings that affect the behaviour of the bilge alarm are described in detail in section 10 Operating
Instructions.
Zero point calibration can be re-adjusted on site whereas full sensor calibration according to IMO-
requirements is performed by manufacturer.
6 C
AUTION
Do NOT remove the internal battery for more than a couple of hours (see 16.2 Battery replacement)
Do NOT open the SENSOR unit as this will invalidate the calibration.
Do NOT open the MASTER unit when it is energized. Hazardous voltages are present inside.
BRANNSTROM SWEDEN AB
www.brannstrom.se
BilgMon488 Instruction Manual vAD 5(38)