Furuno DS-80 manual Specifications of the Doppler Speed LOG

SPECIFICATIONS OF THE DOPPLER SPEED LOG

DS-80

1. GENERAL
(1)	Speed Range	Fore-Aft: -10.0 to +40 knots through-the-water
(2)	Distance Run	0.00 to 999,999.99 nautical miles through-the-water
(3)	Working Depth	Water depth greater than 3 m beneath the keel.
(4)	Working Frequency	1.0 MHz
(5)	Speed Accuracy	1.0% or 0.1 knots whichever is the greater
(6)	Distance Accuracy	1.0% or 0.1 nm whichever is the greater

Note:Accuracy is subject to shallow water effects, to the effect of wind, current and tide, and sensor location. Any ultrasonic equipment having the same frequency may interfere with speed measurement. The Doppler Log transducer should be installed apart from the

	transducers of such kind of equipment.
2. DISPLAY UNIT
(1)	Display	Character size 15 or 21 mm H on monochrome LCD
(2)	Indication
	Ship’s speed	Fore: c**.* knots (+40.0 kt max.)
		Aft: d**.* knots (-10.0 kt max.)
	Distance run	******.** nm
(3)	Other Function	Diagnostic check
3. DIGITAL INTERFACE
(1)	Serial Signal
	Output:	2 ports; VBW, VLW in IEC 61162-1 (NMEA 0183 Ver 2.0)
	Input:	1 port; IEC 61162 (NMEA 0183 Ver 2.0)
(2)	Analog Signal	Speed signal for Analog display: 2 port
		-3.3 mA to 10 mA/ -10 kt to +30 kt
		Analog current output: 1 port
		4 mA to 20 mA/ -10 kt to 30 kt
		Analog voltage output: 1 port
		-3.3 V to 10 V/ -10 kt to 30 kt
(3)	Distance run output	2 ports; Contact closure each 0.005 nm, forward speed,
		30 VDC: 0.4 A
(4)	System Check signal	1 port, 30 VDC: 0.2 A, default: closed

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