858c DI - Browser HUMMINBIRD - Free user manual and instructions
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| Product Type | Fishfinder/Chartplotter with Down Imaging |
| Brand | Humminbird |
| Model | 858c DI |
| Display Size | 8.5 inches diagonal color LCD |
| Display Resolution | 800 x 480 pixels |
| Sonar Type | DualBeam PLUS with Down Imaging |
| Sonar Frequency | 200/83 kHz for standard, 455 kHz for Down Imaging |
| Transducer | XNT 9 DI T included |
| GPS | Internal GPS receiver |
| Mapping | Built-in Humminbird LakeMaster or CoastMaster (optional) |
| Memory | MicroSD card slot for maps and data |
| Power Input | 10-20 VDC |
| Power Consumption | Approximately 1.5 A at 13 VDC |
| Dimensions | 10.1 x 6.3 x 2.8 inches (257 x 160 x 71 mm) |
| Weight | 2.4 lbs (1.09 kg) |
| Mount | Bracket mount or flush mount (optional kit) |
| Temperature Sensor | Built-in in transducer |
| Speed Sensor | Optional (paddlewheel or GPS) |
| Waterproof Rating | IPX7 (submersible to 1 meter for 30 minutes) |
| Maintenance | Clean with soft cloth, mild soap; avoid solvents |
| Safety | Do not operate in explosive environments; secure mounting |
| Spare Parts and Repairability | Contact Humminbird service for parts; user-replaceable fuse |
| General Information | Built-in simulator for training |
Frequently Asked Questions - 858c DI HUMMINBIRD
How do I update the software on my Humminbird 858c DI?
Download the latest update from the Humminbird website, save it to a MicroSD card formatted to FAT32, insert the card into the unit, and power on. Follow the on-screen instructions. Ensure the unit is connected to a stable power source during the update.
Can I use the 858c DI for ice fishing?
Yes, with an optional ice transducer kit. The unit operates in cold temperatures, but the display may slow. Use a 12V battery for power. The Down Imaging feature works through ice, providing detailed underwater views.
What is the maximum depth the 858c DI can read?
The standard DualBeam PLUS sonar can read up to 1500 feet in freshwater. The Down Imaging sonar typically reaches about 250 feet. Actual depth depends on water conditions, bottom type, and transducer installation.
How do I factory reset the Humminbird 858c DI?
With the unit powered off, press and hold the VIEW button while turning it on. Continue holding until the screen displays 'RESET' or 'Factory Defaults'. Release and confirm. Note: This erases all user data and settings.
Can I connect additional displays or accessories?
Yes, via the Ethernet port. You can network with other Humminbird units, radar, or audio systems. Use a 5-port Ethernet switch for multiple devices. Accessories like i-Pilot Link require compatible trolling motors.
What type of transducer does the 858c DI come with?
It includes an XNT 9 DI T transducer, which provides standard 2D sonar (200/83 kHz) and Down Imaging (455 kHz). It also has a built-in temperature sensor. Alternative transducers are available for different hull types.
How do I adjust the sensitivity on the sonar?
From any sonar view, press the MENU key twice to access the Sonar tab. Use the arrow keys to highlight Sensitivity. Increase for more detail, decrease to reduce clutter. Alternatively, use Auto Sensitivity for automatic adjustment.
My screen is flickering. What should I do?
Check the power supply voltage (should be 10-20 VDC). Low voltage can cause flickering. Also, ensure the unit is properly grounded and the transducer cable is not near interference sources like engine wiring. If problem persists, try a factory reset.
Can I create custom maps with the 858c DI?
Yes, using the AutoChart Live feature (if enabled) or by recording sonar logs and importing them into AutoChart PC. Insert a MicroSD card, start recording in the Navigation X-Press menu, and log depth, temperature, and GPS data.
What do the colors mean on Down Imaging?
The color palette represents sonar return strength. Typically, red and orange indicate hard or dense objects (rocks, wood), yellow and green represent softer returns (vegetation, mud), and blue is water column or weak returns. White may indicate very hard bottoms.
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USER MANUAL 858c DI HUMMINBIRD
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Product information
Brand : HUMMINBIRD
Model : 858c DI
Category : Browser