PROFEED for offsore cages
Pictures of installations
Pictures of operation
Profeed system 3500/4500
for Farmocean Offshore cages
PROFEED 4500 is a computer for the specific needs of fish farming and is ideally suited to control and supervise the feeding of the FARMOCEAN 3500/4500 Offshore Cage.
The following product characteristics have guided the development work of PROFEED 4500:
Extensive efforts have been made to obtain a reliable unit. The fish farmer must at all times feel confident that his feed system will function properly under all conditions.
The computer is mounted in a water proof enclosure. All inlets are carefully tightened. Protection from noise, e.g. from radio communication, radar, atmospheric conditions etc., is provided by optocoupled circuits. Components have been selected to meet the climatic stress of an offshore environment: rapid temperature changes, extreme temperatures, high humidity, strong sunlight etc.
Easy to use
The communication between the Operator and the Computer has been simplified as much as possible. A minimum of buttons and keys are employed and the large display provides instructive messages in a simply menu driven format.
The buttons and keys are large and strong to enable activation even in cold weather with gloves on.
The whole computer enclosure is mounted with snap clips making it very easy to replace the complete computer at the unlikely event of total failure.
Perhaps most important to the farmer is a high growth and a low feed factor. Farming conditions may vary from one location to another, one side to another etc. PROFEED 3500/4500 is designed for maximum flexibility meaning that the farmer may feed the fish in an optimum way accordance with existing conditions. It also means that the different computer functions will have different value to different farmers.
The menu contains 15 blocks. Via the ENTER key it's possible to inspect and/or change information in the various blocks.
The 15 blocks are:
(Click on a block to go directly to the block information or just browse down the page for information on all the blocks)
Each block is described below.
In this block the water temperature 3 meters below the surface (when farm is in it's operating position) can be inspected.
In this block the amount of feed having been feed since last reset can be inspected. The memory can store max. 9'999 kg. It's also possible to inspect the amount of feed having been fed previous day.
In this block possibly activated alarms can be inspected and reset.
The following alarms are shown:
In his block the median temperatures of the last ten days can be inspected. Median temperature is calculated and stored each day at midnight.
In this block time and date can be checked and / or entered.
In this block the density of the feed used can be checked and / or entered. Due to the fact that the auto feeder feeds in increments of 6.0 litres and that readouts and entries are made in kilograms, the computer must be given the information of feed density.
In this block the periods every day in which feeding shall be done can be checked and / or entered. Also included is information on how much feed shall be given at each feed.
In this block the maximum and minimum temperatures at which feeding shall be disabled (cut off) can be checked and / or entered.
If cut-off occurs for this reason, then feeding will be automatically started when the temperature again comes within the feeding range.
In this block a reduction of feed per temperature degree can be checked and or entered. The temperature range in which this reduction is possible is 0-30'C.
The reduction is given as a percentage of normal feed quantity. 0-1 00% of normal quantity can be entered for each temperature degree.
In this block a cut-off of feeding due to a rapid fall of temperature can be checked and/or entered.
The temperature fall is defined as reduction per hour and can be entered in the range 0-9°C per hour. If the temperature fall exceeds the entered value, feeding will be disabled for an entered time period. The length of time that feeding will be cut off can be entered in the range of 0-1 2 hours.
In this block an increase, per each 24 hour period, of entered feed quantity can be checked and / or entered. This increase is given in percent and any number in the range of 0,0-9,9% in steps of 0, 1 % can be entered. This makes it possible to feed the fish with the right amount of feed in consideration of the biomass increase previous day.
It should be noted, however, that the maximum feed quantity per hour is 447kg. Usage of the Growth compensation function will not enable exceeding this maximum quantity.
In this block you set the chamber volume that you are using. ex: "PISTON VOLUME 6 LITRE". You could choose 3, 6 or 9 litres.
In this block the number of fish that is in the farm from start can be checked and / or entered. A reduction of dead fish can be entered.
In this block the minimum value of oxygen at which feeding shall be disabled (cut off) can be checked and / or entered.
The length of time that feeding will be cut off after the oxygen value is over the feeding range can be entered in the range of 0 - 12 hours.
In this block the value of oxygen is stored each even hour.
3. ALARM FUNCTIONS
There are five alarm functions, each indicated by a red light on the computers front panel in the event of activation.
All alarms will disable (cut-off) further feeding after activation.
The alarms are:
Cut off temperature / oxygen
This alarm function is activated for two reasons:
This alarm function is activated when a temperature fall exceeding entered limit occurs. The alarm light is turned on and an indication is made in the block ALARM RESET.
When entered cut-off time has elapsed, the alarm light is switched off and the feeding is restarted. The indication in the block ALARM RESET remains, however, to inform the operator that the alarm has been activated.
If the entered cut off time is considered too long, the alarm can be deactivated by resetting it in the block ALARM RESET.
This alarm function is activated when the engine, which move the piston, is overloaded. Feeding will be stopped for 10 minutes and if the alarm continues, a complete check of the system must be carried out.
On the steel structure there is a sensor triggered by very large waves. The sensor's is positioned approximately 2 m above the waterline with the farm in it's operating position.
When the sensor has been triggered the feeding is disabled (cut off) for one hour. The alarm light is turned on and an indication is made on the block ALARM RESET.
When the feeding is again started the alarm light is turned off but the indication in the block ALARM RESET remains to inform the operator that the alarm has been activated.
If the sensor has been triggered by mistake, e.g. when working at the farm, or if the operator wishes to restart the feeding earlier, the alarm can deactivated by resetting it in the block ALARM RESET.
This alarm is activated when the battery voltage fails below 8 VDC when the spreader disk starts. If this happens, the feeding is disabled (cut off). To restart the feeding the operator has to deactivate the alarm in the block ALARM RESET after he has ensured that the batteries are reloaded to a full capacity.