User manual COBRA MF 2500

[. . . ] For Assistance Outside the U. S. A Contact Your Local Dealer or Distributor. Please see www. cobra. com for contact information. Owner's Manual 2 Warnings and Cautions WARNINGS AND CAUTIONS Before using your CobraMarineTM MF 2500 Fish Finder please read these general precautions and warnings. Please read through this manual before the first operation. If you have any questions, please contact the customer service or your local CobraMarineTM dealer or distributor. Extensive exposure to heat may result in damage to the MF 2500 Fish Finder. [. . . ] As this wave travels from the transducer to the bottom, it may strike fish, structures, thermoclines (temperature changes in the water, etc. ). When the wave strikes an object(s) a certain amount of the wave is reflected back to the transducer depending on the composition and shape of the object. When the reflected wave is returned to the transducer it is converted into an voltage and is amplified by the receiver, processed and sent to the display. The speed of sound in water is roughly 4800 ft. /sec, so the time lapse between the transmitted signal and the received echo can be measured and the distance to the object determined. 6 Owner's Manual Technical Specifications 2. THE MF 2500 FISH FINDER 2. 1. TECHNICAL SPECIFICATIONS Display Colors : 16 colors Display Vertical Resolution : up to 400 pixels (depending on chartplotter screen resolution) Power Requirements : 10 - 35 Volt dc Over Voltage protection Reverse Polarity protection Power Consumption - operating : 17W max Power Consumption - stand by : 1. 7W max Operating Frequency : Dual 50 and 200kHz Output Power : 500 or 1000W (4000 or 8000Wpp) Depth Range 1KW/200kHz : 2. 5 Ft (0. 8m) to 1200Ft (365m) 1KW/50kHz : 5 Ft (1. 6m) to 4000Ft (1219m) 500W/200kHz : 2. 5 Ft (0. 8m) to 700Ft (213m) 500W/50kHz : 5 Ft (1. 6m) to 1500Ft (457m) Status LED External Buzzer : 12VDC, 400mA Speed Sensor : if available on transducer Temperature Sensor : one channel TEMP1 (if available on transducer), optional second channel TEMP2 NMEA Output sentences : Depth: $SDDPT, $SDDBT Speed: $VWVHW Trip Log: $VWVLW Water Temperature: $YXMTW TEMP2 Temperature: $YXXDR Operating temperature range : 0C to +50C Storage temperature range : -20C to +70C Weight : 1 kg (2, 20 LBS) Water Proof Specification : IP 54 Case Size : 7. 62" (193. 30mm) x 6. 87" (174. 30mm) x 2. 19" (55. 50mm) Nothing Comes Close to a Cobra® 7 Dimensions 2. 2 DIMENSIONS 2. 3 MOUNTING THE FISH FINDER The MF 2500 Fish Finder should be preferabily mounted in a dry and well ventilated location. Do not mount it where it will be submerged in liquids or exposed to high temperature. 8 Owner's Manual Mounting the Fish Finder 2. 3. 1 Installation Picture showing actual example of the MF 2500 Fish Finder installation. Fix the MF 2500 Fish Finder to the mounting location using the four screws (holes diameter 4 mm), see previous picture. Please be advised that the MF 2500 Fish Finder when not operating will remain in Stand-By mode. 2. 3. 2 Installing Optional Devices See the External Connection diagram in Par. 2. 4 STATUS LED There are seven different LED behaviors, representing seven different diagnostic conditions. BOOTLOADER LED Behavior: OFF The MF 2500 Fish Finder is running in the bootloader, or is not powered on at all. STANDALONE DST, NO TRANSDUCER MODE LED Behavior: ON, steady Nothing Comes Close to a Cobra® 9 Status LED The MF 2500 Fish Finder is in Standalone DST (Depth, Speed, Temperature) mode, but is not pinging because Transducer ID has not detected a transducer. This condition will occur if there is no communication with the chart plotter, and no transducer is connected. STANDALONE DST LED Behavior: 1 long flash every 2 seconds The MF 2500 Fish Finder is in Standalone DST mode, and is pinging normally. This condition will occur if a transducer is connected properly, but there is no communication with the chart plotter. In Standalone DST mode, the NMEA 0183 output produces standard NMEA Depth, Speed, and Temperature sentences. NORMAL FISH FINDER MODE LED Behavior: 1 short flash every 2 seconds The MF 2500 Fish Finder and the transducer are operating properly. WAITING FOR COMMAND LED Behavior: 2 short flashes every 2 seconds The MF 2500 Fish Finder is not pinging because it is waiting for a command from the chart plotter. LOW POWER MODE LED Behaviour: 3 short flashes every 2 seconds The MF 2500 Fish Finder has detected a transducer without trasducer ID, but the "ignore" command has been selected on the chart plotter so the unit is pinging at low power. NO TRANSDUCER MODE LED Behavior: 4 short flashes every 2 seconds: The MF 2500 Fish Finder is not pinging because transducer ID has not been detected a transducer and the "ignore" command has not been selected on the chart plotter. 10 Owner's Manual External Connections 2. 5 EXTERNAL CONNECTIONS Nothing Comes Close to a Cobra® 11 Power Supply Wiring Diagram 2. 6 POWER SUPPLY WIRING DIAGRAM We recommended the installation of a switch and a (5A) fuse in the positive DC supply to the MF 2500 Fish Finder. The MF 2500 Fish Finder is active sending the digital depth through the NMEA interface even when the power (chartplotter) is turned off, thus the need for a switch. In the example below you will notice the positive DC power connection is run through a switch and a fuse before connecting it to the MF 2500 Fish Finder and the chartplotter. 12 Owner's Manual Chartplotter Connection Diagram 2. 7 CHARTPLOTTER CONNECTION DIAGRAM See the following picture to make the connection to the chartplotter: Nothing Comes Close to a Cobra® 13 Transducers 3. TRANSDUCERS The transducer is a device that transmits and receives sound waves into the water. The active component inside the transducer is commonly referred to as an element but actually is a piezoelectric ceramic material. [. . . ] You can act by: properly setting the STC as described at 6. 12 and also by increasing the NOISE LEVEL and reducing the GAIN or the GAIN OFFSET (if you are in auto gain mode). However please note that a strong attenuation of surface clutter may also reduce the capability to detect targets. The Fish Finder is in auto gain mode but the picture display too many small targets, what shall I do to reduce the screen clutter?4. 13 In very shallow waters when the AUTO GAIN mode is selected there are fluctuations in the bottom profile width and its color representation. [. . . ]