Halfords Essentials 684146 Quick Start Manual

BATTERY
CHANGE
1.5V
Battery
(LR44 Typical)
 
MODE AC
Fig.2
10 function : SPD, DST, ODO, CLK, AVG, MAX, TM, TTM, SCAN, SPEED PACER.
TM
DST CLK
Fig.4
CLOCK SETTING
2s 4s
TOTAL 6 SEC

WHEEL CIRCUMFERENCE

1. Roll the wheel until the valve stem at its lowest point close to the
ground, then mark this first point on the ground. (Fig. 5)
2. Get on the bike and have a helper push you until the valve stem
returns to its lowest point. Mark the second point on the ground.
(Sitting on the bike achieves a more accurate reading since the weight
of the rider slightly changes the wheel circumference).
3. Measure the distance between the marks in milimeters. Enter this
value to set the wheel circumference.
Option: Get a suitable circumference value from the table. (Fig. 6)
4. Adjust the wheel circumference as the data setting process.
MAIN UNIT SETUP (Fig.1)
1. Be sure to press the All Clear (AC) key  to clear all stored data and
initiate the computer before using it or when replacing batteryotherwise
the unit may malfunction.
2. The LCD segments will be tested automatically after the All Clear key is
pressed.
3. Press the "MODE" button to stop the LCD test, then the flicking "KM/h"
and "c2155" will be displayed.
 CALIBRATION
1. UNIT SELECTION
1). Press the "MODE  " button to select "KM/h" or "M/h"(Mile/h).
2). Hold the "MODE  " button till the flickering digit is changed to the
digit "2" of the c2155 to recognize either KM/h or M/h as desired.
2. CIRCUMFERENCE DATA SETTING
1). The default is set at 2155mm. Measure the value for your wheel
(Fig. 5) or refer to the quick table provided in the manual for your
bicycle. (Fig. 6)
2). A quick press of the "MODE  " button advances the flickering digit
by 1.
3). To change the flickering digit, hold down the "MODE 
flickering digit moves to the next digit.
FUNCTIONS (Fig. 2)
: Current Speed
0.0–199.9KM/h (120.0 M/h), 0.1KM/h (M/h), +/- 1%
The current speed is always displayed on the 4 digits set when riding.
DST: Trip Distance
0.00–999.99Km (Miles), 0.01Km (Mile), +/- 0.01%
The DST function accumulates the distance data from the last RESET
Current
Speed

Functions

AVG TTM
MAX
clock
setting
6s
Complete
Setting
operation as long as the bicycle is being ridden.
: 12HR Clock
1H00M00S-12H59M59S, 1 Second, +/- 0.05%
It displays the current time in 12HR clock.
TM: Riding Time
0H00M00S-19H59M59S, 1 Second, +/- 0.05%
The TM totals the riding time from the last RESET operation.
AVG: Average Speed
0.0–199.9KM/h (120.0 M/h), 0.1KM/h (M/h), +/- 0.1%
1. It is calculated from the DST divided by the TM; the average data
counted is from the last RESET to current points.
2. It displays an "Err" symbol when either the TM is over 100 hours or
the DST is over 1,000 km (or miles). Reset the unit in order to restart.
English
MAX: Maximum Speed
0.0–199.9KM/h (120.0 M/h), 0.1KM/h (M/h), +/- 1%
It shows the highest speed from the last RESET operation.
TTM: Total Riding Time
0H00M–1999H59M, 1 Minute, +/- 0.05%
The TTM totals the riding time from the last ALL CLEAR operation.
ODO: Odometer
0.0–19999.9Km (Miles), 0.1Km (Mile), +/- 0.1%
The ODO accumulates the total distance as long as the bike is moving.
The ODO data can be cleared by the ALL CLEAR operation only.
: SCAN
1. Auto-Scanning Display Mode
Press the MODE  button till the "
computer will change the DST, , TM, AVG, MAX, TTM and ODO
display modes in a loop sequence automatically every 6 seconds.
2. Fixed Display Mode
Press the MODE  button to turn off the "
desired display mode; the computer will stop the auto-scanning
display operation and the display mode is set.
/ : Speed Pacer
It flashes the " " speed pacer arrow while the current speed is higher
than the average speed and the down arrow " " flickers conversely.

BUTTON AND OPERATIONS

" button till the
AUTOMATIC START/STOP
1. The computer will automatically begin counting
MAX, TTM, TM and AVG data upon riding and stop counting data
when riding is stopped.
2. The flickering symbol " " indicates that the computer is at START status.
Fig.1
Speed Pacer

Main unit setup

Symbol
LCD
SEGMENTS
AUTO TEST
Fig.3
ODO/ SCAN ODO
Fig.5 Fig.6
Setting V alue
= mm x 3.14
= Inch x 25.4 (mm) x 3.14
47 - 305
47 - 406
37 - 540
47 - 507
23 - 571
mm
40 - 559
I nch
44 - 559
47 - 559
50 - 559
POWER AUTO ON/OFF
To preserve battery, this computer will automatically switch off when it
has not been used for about 10 minutes. The power will be turned on
automatically by riding the bicycle or by pressing the button.

MODE BUTTON

Quickly press this button to move in a loop sequence from one basic
function screen to another. (Fig. 2)

ALL CLEAR OPERATIONS (Initiate the Computer)

Press the ALL CLEAR (AC)
CLEAR if any irregular data appears. It will clear all stored data.

RESET OPERATION

1. Hold down the "MODE
release it. The computer will RESET the DST, TM, AVG, MAX.
2. It cannot reset , TTM and ODO data.
RECALIBRATIONS (Fig. 3)
1. Change the LCD display to ODO screen, hold down the "MODE
button till (about 6 seconds) it jumps into the calibrating screen.
2. Refer to the main unit setup process to adjust the circumference.
3. Hold down the "MODE
" symbol is displayed. The the recalibration mode to store the desired data and complete

recalibrations.

12HR CLOCK SETTING (Fig. 4)
1. Change the LCD display to "
" symbol and select a 2. Press the "MODE  " button till (about 6 seconds) it jumps into the
clock adjusting screen to set the clock.
3. A quick press of the "MODE
4. To change the flickering digit, hold down the "MODE
the flickering digit moves to the next digit.
5. Hold down the "MODE
the setting to store the desired data and complete clock setting.

BATTERY CHANGE

1. When the brightness of the LCD display is dim, it means that the
, ODO, DST,
battery is nearly exhausted.
2. Replace with a new LR44 (Cross reference type A76, AG13 or V13GA)
battery in the compartment on the back of the computer with the
positive (+) pole toward the battery cap.
684146 Halfords ESS 10 Function Computer
Calbration (unit selection & circumference setting)
0~3
2s
+1
RECALIBRTIONS
4s
2s
TOTAL 6 SEC

WHEEL SIZE CHART

Setting
WHEEL SIZE WHEEL SIZE
Value
16 x 17.5 x 2 54 - 559
1217 26 x 2.00
20 x1.75 x 2 1590 57 - 559 26 x 2.215
24 x13 /8A 1948 37 - 590 26 x 13/8
24 x1.75 x 2 37 - 584
1907 26 x13/8 x 11/2
26 x1 1973 20 - 571 26 x 3/4
26 x 1.5 2026 32 - 630 27 x 11/4
26 x1.6 28 - 630
2051 27 x 11/4 Fifty
26 x 1.75 x 2 40 - 622 28 x 1.5
2070
26 x 1.9 2089 40 - 622 28 x 1.75
 TROUBLE SHOOTING
Check the following before taking unit in for repairs.
PROBLEM
No display
No current
Speed or
key to initiate the computer or use ALL

incorrect
data
 " button till the LCD digit is blanked, then
 "
Irregular
" button till (about 6 seconds) it jumps out

display
LCD is
black
" screen.
Display is
slow
 PRECAUTIONS
 " button advances the flickering digit by 1.
 " button till 1. This computer can be used in the rain but should not be used under
water.
 " button till (about 6 seconds) it jumps out
2. Don't leave the main unit exposed to direct sunlight when not riding the
bike.
3. Don't disassemble the main unit or it's accessories.
4. Check relative position and gap of Speed Sensor and magnet periodically.
5. Clean the contacts of the bracket and the bottom of the main unit periodically.
6. Don't use thinner, alcohol or benzine to clean the main unit or its
accessories when they become dirty.
7. Remember to pay attention to the road while riding.
4403000000_20140107
End setting
2s

calibration

6s
Complete
Setting
Setting Setting
WHEEL SIZE
Value Value
40 - 635 28 x 11/2 2265
2114
37 - 622 28 x 11/8 x 15/8 2205
2133
700 x18c
18 - 622 2102
2105
20 - 622 700 x 20c 2114
2086
23 - 622 700 x 23c 2133
1954
700 x 25c
25 - 622 2146
2199
28 - 622 700 x 28c 2149
2174
32 - 622 700 x 32c 2174
2224
700 x 35c
37 - 622 2205
2268
700 x 40c 2224
40 - 622
CHECK ITEMS SOLUTION
1. Is the battery dead? 1. Replace the battery.
2. Is there incorrect battery 2. Be sure that the positive pole
installation? of the battery is facing the
battery cap.
1. Is it at the recalibrating 1. Refer to the adjusting
or 12HR clock setting procedure and complete the
screen? adjustment.
2. Are the contacts between 2. Wipe contacts clean.
the main unit and the 3. Refer to Installation(Fig.C1)
bracket poor? readjust data correctly.
3. Are the relative positions 4. Repair or replace wire.
and gap of Speed Sensor 5. Refer to "CALIBRATION"
and magnet correct? and enter correct value.
4. Is the wire broken?
5. Is the circumference
correct?
Refer to the "MAIN UNIT SETUP"
and initiate the computer again.
Did you leave main unit
Place main unit in the shade to
under direct sunlight when
return to normal state.No
not riding the bike for a
adverse effect on data.
long time?
Is the temperature below Unit will return to normal state
0°C (32°F)? when the temperature rises.