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read the user manual as to how to calibrate the unit
remember that it reads the distance from the sender unit to the sea bed/river bed and not from the display unit
Hello
It is not possible to connect. Out three wires comes from Humming Bird, Black one is Negative, Red one is for 12VDC supply and the other is for buzzer. So it cannot be connected with Coax-Cable. OK.
Im not familiar with your particular unit but you should be using a low frequency transducer for water over 500'; something like a 50 kHz transducer or a dual frequency transducer like a 50/200kHz for detail with the high freq. but increased depth range on the lower frequency. As far as setting it to 250 ft, you should be able to use the range feature and adjust the maximum to 250'. typically the factory default is automatic so it will caonstantly adjust the range based on the maximum current depth.
The Depth & temp come from two different sensors. Check your coax cable to the transducer (the lager oval piece), the connector, and the transducer for cracks /breaks in insulation. Good luck.
Hi! here's a user manual/installation manual for your sounder: NS25 If the depth sounder portion works, I would suspect the settings are off (check first) or the gps circuit needs repair. Best of luck! Mike
We have an old Hummingbird Depth Sounder (Wide 100, 94 model) and it turns on but must be on test mode or smething cause we can not get it off. Does anyone know or have a manual to solve this problem. Please help.
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