NorthStar Navigation 435, 438 operation manual Appendix a Specifications, Cleaning and maintenance

Explorer R310: Repeater for depth, speed, water temperature and battery voltage. Accepts NavBus or NMEA data inputs from other instruments.

	Explorer 550:
	Color GPS
	Chartplotter
Explorer D210:	with worldwide
	coverage
Depth Repeater

6-6 Cleaning and maintenance

Clean the screen only with a damp cloth and mild detergent when dirty or covered in sea salt. Avoid abrasive cleaners, petrol or other solvents.

Cover or remove a transom-mounted transducer when repainting the hull. If painting over a through hull transducer with antifouling paint, use only one coat of paint. Remove the previous coat of antifouling paint by sanding it lightly.To optimize performance, avoid walking on or jamming cables

and connectors. Keep the transducer free of weed, paint and debris. Do not use a high pressure water blast on a speed sensor paddlewheel as it may damage the bearings.

When not in use, the Explorer 435 or Explorer 438 can be removed from the installation bracket and stored in the Northstar carry bag, or left on the installation bracket and securely covered with the sun cover.

Appendix A - Specifications

Depth range

•2 ft (0.6 m) to 600 ft (180 m).

Display type

•TFT Color.

•Screen resolution 320 high x 240 wide (pixels).

•LED multi-level backlighting.

Supply voltage

•10 to 16 V DC.

Supply current at 13.8 V

•300 mA min - no backlighting.

•400 mA max - full backlighting.

Output power

•Variable, up to 200 W RMS.

Operating temperature

•32° to 122°F (0° to 50°C)

Transom transducer cable length

•Explorer 435 33 ft (10 m).

•Explorer 438 26 ft (8 m).

Typical depth acquisition time from startup

•2 seconds at 100 ft (30 m).

Receiver sensitivity

•Better than 10 micro volts RMS.

•Dynamic range 4.0 million to 1 (120 dB).

Temperature measurement range

•32° to 99.9°F (0° to 37.7°C) Resolution of 0.1° unit.

Transducer frequency

•200 kHz.

Speed range

•1 to 50 kn (57.5 mph, 96.6 kph).

Standards Compliance

•EMC:USA FCC Part 15 Class B.

Europe (CE) EN50081-1 and EN50082-1

New Zealand and Australia (C Tick)

AS-NZS 3548.

·Environment: IPx6, IPx7.

NMEA Output (Explorer 438 only)

NMEA 0183 (Ver 2.0) 4800 baud is a standard for interfacing marine electronic devices. The Northstar fishfinder can output the following sentences:

•DBT (Depth Below Transducer)

•DPT (Depth and Keel offset)

•MTW (Water temperature)

•XDR (Battery voltage and fuel flow).

•VHW (Speed)

Fuel Computer (Explorer 438 only)

(optional fuel transducer(s) required)

•Outboard carburetted two stroke and EFI petrol/gasoline engines: 30 to 300 hp.

•Outboard four stroke petrol/gasoline engines: 90 to 300 hp.

•Inboard petrol/gasoline engines: 50 to 300 hp.

•Minimum flow rate: 1.3 U.S. gallons per hour (5 litres per hour).

•Maximum flow rate: 34 U.S. gallons per hour (130 litres per hour).

Northstar Explorer 435/438 Installation and Operation Manual 27