Bell F20 Speedometer Users Manual

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Bell Wireless Speedometer™

Installation

BATTERY Make sure to write down the Odometer value

before changing the battery so you can later re-enter it in

the odometer. Install the new battery with the positive (+)

pole facing outward (Figure 1). After changing the battery

all settings are erased.

Clamp the magnet to a spoke on the right side of the front

wheel (Figure 2). Make sure that the magnet is facing the

outside of the wheel so that the flat side of the magnet

passes in front of the sensor.

Attach the speedometer sensor to the right fork leg using

the two cable ties provided. Make sure the metal side of

the sensor is facing the wheel. Do not fully secure the

cable ties yet, as the sensor location might require further

adjustments (Figure 3).

Adjust the sensor and magnet location so that clearance

between the two is no greater than 1/5" (5mm) (Figure

4). Magnet should pass by the tip of the sensor.

Remove the adhesive tape shield on the back of the

bracket and position the bracket on the handlebar of the

bicycle. Fasten the O-ring around the top edge of the

bracket and wrap around the underside of the handlebar

and attach to the bottom edge of the bracket. Insert the

computer into the mounting bracket and twist to the

right to lock into place.

Sensor

or Magnet

5mm

Sensor

Magnet

Sensor

Top View

Bicycle fork

Sensor

or Magnet

5mm

Sensor

Magnet

Sensor

Top View

Bicycle fork

Sensor

or Magnet

5mm

Sensor

Magnet

Sensor

Top View

Bicycle fork

Sensor

or Magnet

5mm

Sensor

Magnet

Sensor

Top View

Bicycle fork

Wheel Size Input

The flashing number "2124" is the preset value. To de-

termine the correct wheel factor, refer to the table shown.

Set the wheel factor by pressing the Right button until the

correct setting appears. Press the Left button to lock in

the correct digit. Repeat until all four digits are entered.

Programming the Computer

Road Bike

20" 1596

22" 1759

24" 1916

26" 2073

27"/700c 2124

Mountain Bike

24" 1888

26" 2045

27" 2155

28" 2237

Quickstart

Now that the speedometer is configured, insert the com-

puter into the bracket and twist to the right to lock in place.

To check for proper installation, spin the front wheel. The

speed tendency icon in the upper left corner of the screen

should be turning as the computer starts recording data

(Refer to Troubleshooting in case of problems).

LOWER SCREEN

Trip Distance (DST)

0–999.9 Km or M

Trip Timer (TM)

9 hrs 59 min 59 sec

Odometer (ODO)

Average Speed (AVS)

Maximum Speed (MXS)

Clock

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UPPER SCREEN

Current Speed (SPD)

0–199.9 Km/hr or M/hr

Calories Burned (CAL)

0–999.9 Calories Burned

Speed Comparison (+ or -)

Speed Tendency

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Current Speed (SPD)

Current Speed represents instantaneous speed. It

is displayed on the upper screen. The speedometer

measures speeds up to 200Km/hr or 125 M/hr. If no keys

are touched and no movement sensed from the bicycle

for five minutes, the speedometer will go into sleep mode.

Press any key to reactivate.

Calories Burned (CAL)

Calories Burned is displayed on the upper screen. It rep-

resents the accumulated number of calories burned while

riding. The calorie count on the screen will start over once

999 calories have been burned. Calories Burned can be

reset at any time by pressing and holding the Left button

when "CAL" is displayed on the screen.

Speed Comparison (+ or -)

"+" or "-" appears next to the current speed. This func-

tion shows the positive or negative acceleration of your

WARNING!

Improper installation of this or any other bike computer

can result in an accident. Read instructions carefully.

Call 1-800-456-BELL if you have any questions

about installation.

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Check mounting hardware and transmitter installation

before each ride for adjustment and secure fit.

This computer will not fit all bikes. If you cannot get a

secure installation per the instruction manual, do not

use this computer.

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Sensor

Mounting Bracket

Cable Ties (2)

Magnet

O-Rings (3)

Computer Battery

(3.0V/CR2032)

Computer Unit

Components

Km or Mile Selection

After setting the Wheel Factor the Km/M selection will

appear. Press the Right button to choose kilometer or

mile. Press the Left button to confirm.

12 or 24 Hour Format Selection

After the Km/M input selection, the clock format screen

will appear. Press the Right button to choose between the

two formats. Press the Left button to confirm.

KG or LB Selection

After the hour format selection, the Kg/Lb selection

will appear. Press the Right button to choose between

Kilograms (Kg) or Pounds (Lb). Press the Left button to

confirm choice.

Once the weight unit is selected, the computer will

ask the user to enter his/her weight. This will allow the

computer to accurately estimate the number of calories

burned while riding.

To enter the correct weight, press the Right button until

the correct digit appears. Press the Left button to lock in

the correct digit. Repeat until all digits are entered.

NOTE: The weight entered should be between 80–499Lb

or 35–199Kg. The speedometer is now ready to use.

Clock

Set the time by pressing and holding the Right button

until the hour is flashing. To set, press the Right button

until desired setting is displayed. Press the Left button to

confirm. Repeat steps for the minute setting.

Continued On Reverse Side

Quickstart (Continued)

current speed. If the current speed is higher than the

average speed, a "+" is displayed on your screen. If the

current speed is lower than the average speed, a "-" is

displayed on the screen. Shows only when SPD function

is on upper screen.

Speed Tendency

"Graphic" is the animation of the wheel moving.

Trip Distance (DST)

Press the Right button until "DST" appears. Trip Distance is

displayed on the lower screen. It is activated automatically

with the bicycle in motion. Trip Distance can be reset by

pressing and holding the Right button for two seconds

when "DST" is displayed on the screen.

NOTE: Resetting Trip Distance will automatically reset Trip

Timer and Average Speed.

Trip Timer (TM)

Trip Timer is displayed on the lower screen. It is activated

automatically with the bicycle in motion: it is on when you

ride and off when you stop. To display the timer, press the

Right button until "TM" appears. The timer records the

total cycling time for each trip. Trip Timer can be reset at

any time by pressing and holding the Left button for two

seconds when the "TM" is displayed on the screen. Note:

Resetting Trip Timer will automatically reset Trip Distance

and Average Speed.

Odometer (ODO)

Odometer is displayed on the lower screen. Just like a car,

it measures distance ridden over time. After changing the

computer battery, ODO will be set to zero. The odometer

can be reset to the previous value by pressing and holding

the Left button for two seconds when "ODO" is displayed

on the screen.

Average Speed (AVS)

Average Speed is displayed on the lower screen. It

represents the average speed while riding. Press the

Right button until the "AVG" appears. The average speed

is measured over the total cycling time for each trip. A

figure can be expressed in Km/hr or M/hr. The average

speed can be reset at any time by pressing and holding

the Right button for two seconds when the AVS is

displayed on the screen.

NOTE: Resetting the Average Speed will automatically

reset the Trip Timer and Trip Distance.

Maximum Speed (MXS)

Press the Right button until the "MXS" appears. This

display will show the maximum speed during your ride.

Maximum Speed can be reset at any time by pressing

and holding the Left button for two seconds when the

MXS is displayed on the screen.

Reset

Trip Reset

Program Reset

Total Reset

Calories Burned (CAL)

Trip Distance (DST)

Trip Timer

Average Speed (AVS)

Clock

Odometer (ODO)

Maximum Speed

Press both main left and

right buttons down for 2

seconds

Above functions plus:

Wheel Circumference

KM or Mile Selection

12-24 Hour Format

KG or LB Selection

User Weight

Clock

Max Speed (MXS)

Odometer Press YELLOW button on

Left back of speedometer

with a pencil tip

All functions, including Odometer

(ODO) are reset (same as when

you change the battery)

Nothing Press RED button on Right

back of speedometer with a

pencil tip

What’s Reset What’s Not Reset How

Hold either left or right main button for more than 1 second to activate the backlight feature & illuminate

the display screen

Problem

No speedometer display

and/or no data reading

Slow display response

Display shows

irregular features

Black display

Possible Cause

Interference from electrical sources

Improper magnet/sensor alignment

Poor battery contact or low/dead battery

Temperature outside of operational

limits (0-60°C or 32-140°F)

Poor battery contact or

low/dead battery

Temperature too hot or display

exposed to sunlight too long

Computer damaged or dropped

Recommended Action

Move computer to different area

Ensure sensor & magnet are

properly installed and aligned (p. 1)

Replace battery

Only use computer when temperature

is within operational limits

Replace battery

Only use computer when temperature

is within operational limits. Remove

from sunlight

Computer is broken

Troubleshooting

Backlight

Reorient or relocate the receiving antenna.

Increase the separation between the equipment & receiver.

Connect the equipment into an outlet on a circuit different

from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician

for help.

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This device complies with Part 15 of the FCC Rules.

Operation is subject to the following two conditions: (1) This

device may not cause harmful interference, and (2) This

device must accept any interference received, including

interference that may cause undesired operation.

Warning: Changes or modifications to this unit not

expressly approved by the party responsible for compliance

could void the user's authority to operate the equipment.

NOTE: This equipment has been tested and found to

comply with the limits for a Class B digital device, pursuant

to Part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference

in a residential installation. This equipment generates uses

and can radiate radio frequency energy and, if not installed

and used in accordance with the instructions, may cause

harmful interference to radio communications.

However, there is no guarantee that interference will not

occur in a particular installation. If this equipment does

cause harmful interference to radio or television reception,

which can be determined by turning the equipment off and

on, the user is encouraged to try to correct the interference

by one or more of the following measures:

FCC Warning

©2006 Bell Sports, Inc. Rantoul, IL 61866

www.bellbikestuff.com

Part #115238