For Control, Monitoring and Data Logging during Fish Transport
The Convoy is a Commander system designed to control, monitor and record the dissolved oxygen of tanks in vehicles or boats used for living fish. Temperature is also measured and monitored.
This system can be used to control dissolved oxygen during the transport of live fish. An output signal from Convoy can be used to inject oxygen proportionally – when a little more oxygen is needed, a little more is injected. This method insures that DO levels are kept constant – the fish are stressed as little as possible and no water is wasted.
Control is individual for each tank. The system is built up in modules and can be added too as required. An input box for 4 analogue signals, e.g. for pH and 5 on/off input signals can be connected. Control outputs for pH can be added.
As well as controlling water quality the Convoy also records values of dissolved oxygen, temperature and barometric pressure. This ensures that transport does not constitute a break in the establishment of a complete record of the conditions the fish have lived under. After the transport a hard copy of the maximum, minimum and average values for these parameters for each tank is generated in two copies.
The data can be transferred to a PC. The system is set by attaching a PC to it, the control and alarm set points cannot be altered during transport. The Convoy is part of the Commander family of equipment, and like other Commander components uses the P-NET field bus system. When the same system is used in the hatchery, on-growth unit and during transport the data collected during transport can easily be integrated into a single record. The availability of know-how and parts should service be necessary is also ensured.
Probes for dissolved oxygen and temperature (max.16 per system) One or two DO meter boxes as appropriate. One or more oxygen control boxes as required. Input box as required. Max. 4 analogue and 5 on/off inputs. One Master unit with keyboard and display. The keyboard can be separate. Printer, Alarm horn and Flashing light as required
Stored data, printed record of conditions, alarm signal, max. 16 oxygen dosing and 16 emergency oxygen output signals, max. 4 other on/off output signals
Operating Conditions: 0 to 40°C
Power Supply: 24 VDC
Range: ppm; 0-5 to 0-40 ppm (mg/l), %Saturation; 0-50 to 0-400 %saturation, Temperature; -5 to +45°C, other ranges on request
Accuracy: Error less than +/- 2 % of actual value when measuring temperature is the same as the calibrating temperature
Response Time: Probe; 90% of end value within 1 minute
