BRANNSTROM CleanTrack 1000 B, Operation And Technical Manual, Page: 21 / 232

Brannstrom Sweden AB CleanTrack 1000B - Rev 2.20xd, 2019 Page 21 of 232
4.4. Flow meter and Speed log
4.4.1. Flow meter general
“The monitoring system should comprise a flow rate indicating system to measure the rate of effluent being discharged
into the sea.”
Selection of flow meter type is optional. The flow meter should meet the following requirements according to IMO
Resolution MEPC.108(49) chapter 6.4.
“A flow meter for measuring the rate of discharge should be installed in a vertical section of a discharge line or in any
other section of a discharge line as appropriate, so as to be always filled with the liquid being discharged.
A flow meter should employ an operating principle suitable for shipboard use and, where relevant, which can be used in
large diameters pipes.
A flow meter should be suitable for the full range of flow rates that may be encountered during normal operation.
Alternatively, arrangements such as the use of two flow meters of different ranges or a restriction of the operational
flow rate range may be necessary in order to meet this requirement.
The flow meter, as installed, should have an accuracy of ±10%, or better, of the instantaneous rate of discharge
throughput the operating range for discharging the effluent. It might be necessary to limit the operational range of the
discharge rate in order to achieve sufficient accuracy.
The design of the flow meter arrangements should have regard to the safety requirements of the space in which such
metering arrangements are located.”
Any flow transmitter, having an output signal of 4-20mA and that complies with the regulations that applies to the
particular installation may be used. Follow the instructions for the selected flow meter.
Refer to chapter 7.8.2. ZF1 (Zener barrier flow input 1) page 68 , ZF2 and CVF for software programming.
4.4.2. BRANNSTROM standard flow transmitter.
Brannstrom Sweden has selected a flow transmitter that complies with the regulations and works well in the application.
See drawings:
•
CT891215.5, CleanTrack Flow meter unit, Vertical page 145.
• CT900503.1, CleanTrack Flow meter unit, Horizontal page 146.
4.4.3. Speed log general
“The monitoring system should comprise a ship speed indicating device to give the ship’s speed in knots.”
The speed indication system should meet the following requirements according to IMO Resolution MEPC.108(49)
chapter 6.5.
“The automatic speed signal required for a monitoring system should be obtained from the ship’s speed indicating
device 7 by means of a repeater signal. The speed information used may be either speed over the ground or speed
through the water, depending upon the speed measuring equipment installed on board.”
Refer to chapter 7.8.7. Speed page 70 for software programming.
The speed log signal connected to CleanTrack 1000 B should be a pulse signal from a voltage free relay or switch. The
pulse frequency should be proportional to the speed.
The data of the speed output signal should meet:
1. Minimum switch on or off time: 33 ms
2. Pulse frequency range: 45-250 pulses/nm.
7
See ”Recommendation on Performance Standards for Devices to Indicate Speed and Distance” (Annex to resolution
A.824(19) as amended by resolution MSC.96(72)).