Manual Filzer dB4LW Cycling Computer

Manual

dB4LW Wireless Cycle

Computer Owner's Manual

Functions

Speedometer (0-99.9 Km/hr or M/hr)

Tripmeter (DST) (Up to 999.99 Km or M)

Odometer (ODO) (Up to 9999.99 Km or M)

Auto trip timer (TM) (9:59:59)

Maximum Speed (MXS) (up to 99.9 Km/Hr or M/hr)

Digital Clock, 12/24 hour Selectable

Average Speed (AVS) (0-99.9 Km/hr or M/hr)

Speed Comparator (+ or -)

Speed Tendency

Odometer Program Function

Figure 1

Computer

Battery

3V/CR2032

Figure 2

Transmitter Battery

12V/VR22

L1028/A 23

Remove the battery cover from the bottom of the

computer using a small coin. Install the 3V battery

with positive (+) pole facing the cover as in Fig. 1. If

the LCD shows irregular figures, take out the battery

and install again. This will clear and restart the

computer's microprocessor.

Install the 12V battery in the transmitter with the

positive (+) pole facing the battery cap. Re-install

the cap with a small coin and be sure it is tight to

ensure waterproofness. See Figure 2.

Sensor Installation

mounting

bracket

transmitter

magnet

computer battery

(3V/CR2032)

transmitter battery

(12V/VR22/L1028)

cable tie

Figure 3a

Figure 3b

Figure 3c

Figure 4a

Figure 4b

flat

spoke

normal

spoke

Clamp the magnet on

the spoke of the front

wheel with the screw

provided and attach the

sensor to the left fork

using cable ties as

shown in Fig. 3a, 3b

and 3c. Make sure the

arc of magnet intersects

the alignment mark on

the sensor with 2mm

clearance as shown in

Fig. 4a and 4b.

2mm max

Attach the mounting bracket to the right side of the

handlebar with the cable ties as shown in Figure 5a

and 5b. Make sure the mounting bracket is clamped

tightly and will not slip on the handlebar, use the

rubber shim provided.

Figure 5a

Figure 5b

Figure 6

Slide the computer on to the mounting bracket until it

snaps firmly into position. Press the release button

to remove the computer as shown in Fig. 6.

computer

max 60 cm

Press and hold the LEFT and RIGHT buttons

for 4 seconds to access wheel size input

mode. Note all information in the

computer will be erased.

The digits on the bottom row will flash. The

value you need to enter in to the computer is

the Wheel factor. Wheel factor is the

circumference of the wheel in mm.

Note, there are no standard wheel sizes in

the cycling world - i.e. the circumference of a

700x23 tire will differ from one brand of tire to

another so for accurate speed and distance

values on your computer you need to

measure your wheel circumference.

To obtain wheel factor:

1) Fast (and not so accurate) method - use

chart provided.

2) Most accurate method:

a) See Figure 8.

b) Inflate you tires to its proper pressure.

c) Put a mark on your front wheel on the

outside circumference.

d) Put a mark on the floor.

e) Put the mark on the wheel on the mark on the floor.

f) Rotate the wheel one full revolution until the mark on the wheel is on

the floor again.

g) Measure the distance between the marks in mm. This is the wheel

factor (i.e. your wheel circumference).

Fig.8

C=distance in mm

per one turn

C

2

x

x

1

d

Km/Mile Selection

After the wheel factor input, the Km/Miles units for distance and speed

will flash. Press the RIGHT button to toggle between kilometer (KM) and

miles (M), press the LEFT button to confirm.

W hee l D iame ter d W hee l Fa ctor c

26 x 1 .0 191 3

26 x 1 .25 195 3

26 x 1 .4 200 5

26 x 1 .5 201 0

26 x 1 .75 202 3

26 x 1 .95 205 0

26 x 2 .0 205 5

26 x 2 .1 206 8

26 x 2 .3 217 0

700 x 18 207 0

700 x 20 208 6

700 x 23 209 6

700 x 25 210 5

700 x 28 213 6

700 x 30 217 0

27 x 1 " 214 5

27 x 1 1/8 " 215 5

27 x 1 1/4 " 216 1

HOW TO MEASURE WHEEL FACTOR

Clock (12H/24H): A 12 or 24 hour digital clock is

displayed on the third row of the screen. After

Km/mile selection in setup mode, the 12h/24h will

flash. Press the RIGHT key to toggle between the

12 and 24 hour format. Press the LEFT button to

confirm and advance to the clock mode. Press the

RIGHT button to advance the hours by one unit (hold

RIGHT button for fast advance). Press the LEFT

button to confirm hours. Press the RIGHT button to

advance the minutes (hold RIGHT button for fast

advance). Press LEFT button to confirm minutes and

exit setup mode.

ODOMETER SET: To set the

odometer (ODO) after battery

replacement and wheel size

setting, press RIGHT button to

advance to ODO mode and then

hold LEFT button for 5 seconds

until the last digit of the ODO is

flashing. TO adjust the value, press

the RIGHT button and then press

the LEFT button to confirm and

select the value. Repeat this

sequence to reach the desired

odometer value.

DISPLAY:

Current speed, Average Speed (AVS), Tripmeter

(DST), Trip Timer TM and Speed Comparator (+ or

-) are shown in the first display screen. Press the

RIGHT button to toggle between the two

display screens.

Current Speed, Maximum Speed

(MXS), Clock (CLK), Total Distance, Odometer

(ODO) and Speed Comparator (+ or -) are shown

in the second display screen.

Speed Comparator:

A "+" or "-" sign appears on the second row of the

display to the right of the AVG/MAX speed. A "+"

indicates you are traveling faster than your Average

Speed (AVS). A "-" indicates you are riding slowr

than your Average Speed.

Speed Tendency: (Acceleration and Deceleration)

A cyclist icon appears on the second row of the

display. The wheel turns forward to indicate

acceleration, and turn backwards to indicate

deceleration.

Speedometer: (Km/Hr or M/Hr)

Speedometer or Current Speed is displayed in the

top row.

Odometer: (ODO)

Total distance traveled (ODO) is displayed on the

bottom row. To reset ODO see page 7 Odometer

Set.

Tripmeter: (DST)

Trip distance (DST) is displayed on the third row.

Tripmeter is activated automatically with speedom-

eter input. To reset DST to zero press and hold

LEFT button for 2 seconds. Note, TM (Trip Time)

and AVS (Average Speed) will also be reset at this

time.

Maximum Speed: (MXS)

Maximum speed (MXS) is

displayed on the second row.

Maximum speed is stored in

memory and updates only

when a higher speed is

reached. To reset MXS to zero, go to the MXS

screen and then press and hold the LEFT button for

2 seconds.

Average Speed: (AVS)

Average Speed (AVS is displayed on the second

row. AVS is calculated using the Trip Timer and

Tripmeter. To reset AVS, go to the AVS screen then

press and hold the LEFT button for 2 seconds.

Trip Timer: (TM)

Trip Timer (TM) is displayed on the bottom row. Trip

Timer is activated automatically with speedometer

input (when front wheel is turning). It records only

the time spent actually riding. To reset TM to zero go

to TM screen and press and hold the LEFT button for

2 seconds.

Auto Start/Stop: To prolong battery life, the

computer will automatically switch off if the unit

receives no signal from the transmitter for more than

5 or 6 minutes. Computer display will turn on again

by pressing a button.

Congratulations on your purchase of the dB4LW wireless

cycle computer by FILZER. Packed with all the features that

a professional rider needs to keep track of during a workout,

this computer is a perfect training tool for any cyclist.

Filzer

Made in China

Visit www.filzer.com for more great products.

Art No.: BS-13-MOS-KSS-P3-GB-Filzer(db4LW)-R4

Problem

Inaccurate maximum

speed reading

No Speedometer

reading

Slow display response

No Trip Distance

reading

Display shows

irregular figures

or blank screen

Solution

Unknown atmospheric or

RF interference. Reset

Max Speed.

Temperature outside out

of operating limits

(32-125 ºF or 0-55 ºC)

Re-install computer battery

and verify that the

computer battery is good.

Improper magnet/transmitter

alignment. Check magnet/

tramitter alignment. Verify

transmitter batter is good.

Improper magnet/transmitter

alignment. Check magnet/

tramitter alignment. Verify

transmitter batter is good.

left

right

Press to

release

rubber

shim

Rating

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