King-Meter Digital II-LCD User manual

KING-METER
USERS GUIDE
Digital II –LCD
English

I
Contents
Preface............................................................................................... 1
Appearance and Size .........................................................................2
Material and Color ....................................................................2
Function Summary and Button Definition........................................3
Function Summary ....................................................................3
Normal Display Area..................................................................4
Button Definition....................................................................... 4
Operation Cautions ...........................................................................5
Installation Instruction ......................................................................5
Standard Operation........................................................................... 6
Power On/Off ............................................................................6
Display Interface........................................................................ 6
Walk Assist.................................................................................7
Turn on Backlight....................................................................... 8
PAS level Selection.....................................................................8
Battery Indicator........................................................................9
Error code..................................................................................9
Users Setting....................................................................................10
Preparation before Starting up ...............................................10
General Setting........................................................................10
Trip Distance and Trip Time Clearance....................................10
Backlight Brightness ................................................................11
Exit Setting............................................................................... 11
Password Setting .....................................................................11

II
Password Enable ..................................................................... 12
Password Modification............................................................12
Using Parameter Setting ......................................................... 13
Wheel Diameter Setting..........................................................14
Speed Limit Setting .................................................................14
Personalized Parameter Setting......................................................15
Personalized Setting Password Input......................................15
Battery Indicator Setting .........................................................16
Pedal Assist Parameter Setting ...............................................17
Pedal Assist Level Option ................................................17
Pedal Assist Ratio Modification ......................................17
Controller Over-Current Cut Setting .......................................18
Pedal Assist Sensor Setting .....................................................19
The Direction of Pedal Assist Sensor Setting ..................19
The Sensitivity of PAS Sensor Setting..............................19
PAS Sensor Proportion Parameter Setting......................20
Speed Sensor Selection...........................................................20
Throttle Function Setting (optional) .......................................21
Throttle Walk Assist Enable/Disable(optional)...............21
Throttle Vector Enable/Disable(optional).......................21
System Setting .........................................................................22
Delay Time Setting of Battery Power ..............................22
Max Speed Limit Setting .................................................22
Button Walk Assist Enable Setting ..........................................23
Walk Assist Speed Setting ...............................................24
Slowly Start up Setting ....................................................24
Exit Setting............................................................................... 25

III
Recover Default Setting...................................................................25
FAQ and Questions..........................................................................26
Quality Warranty and Coverage......................................................27
Circuit Block Diagram ......................................................................28
Software Version .............................................................................29
Appendix 1: Error Code...................................................................30
Appendix 2: Password Table............................................................30
Appendix 3: Personalized Parameter Setting..................................31
Continue Appendix 3:..............................................................32
Appendix 4: Pedal Assist Proportion default value.........................33

1
Preface
Dear users,
To ensure better performance of your e-bike, please read through
the Digital II-LCD product introduction carefully before using it. We
will use the brief words to inform you of all the details（including
hardware installation, setting and normal use of the display）when
using our display. Meanwhile, the introduction will also help you
solve possible confusion and barriers.

2
Appearance and Size
Material and Color
Digital II-LCD housing material: PC. And the color of housing is
black. Working temperature scope: -20℃—+60℃, the shell
material can ensure normal use and good mechanical performance
of the products
Display Size and Installation Size（Unit：mm）

3
Function Summary and Button Definition
Function Summary
Digital II-LCD offers plenty of functions and showing to meet your
requirements.
◆Battery indicator
◆Speed（Including real time speed, Max speed and Average
speed）
◆Distance (Including single Trip distance, ODO）
◆Trip time
◆Walk assist
◆Turn on Backlight
◆Error code
◆Multiple parameter setting
◆Recover default parameter setting

4
Normal Display Area
Digital II-LCD Normal display interface
Button Definition
The display with three buttons as below diagram, in the following
introduction，is named as MODE, is named as
UP, is named as DOWN.

5
Operation Cautions
Be careful during use, do not plug in and out the connector of
display when electrified.
Avoid collision.
Please do not tear off the stickers to avoid water infusion.
Please do not modify system parameters to avoid
parameter disorder.
Make the display repaired immediately when not working
properly.
Installation Instruction
Fix the display on the handlebar, adjust the angel. Plug the two
connectors from display and controller when off power supply.

6
Standard Operation
Power On/Off
Hold MODE button to start display and supply power to the
controller, E-bike start to work. When at working state, press and
hold MODE to shut off E-bike power. In the off state, the display no
longer uses the battery's power supply; leakage current is less than
1uA.
If do not use E-bike for more than 10 minutes, the display
will turn off automatically.
Display Interface
After turning on display, it shows real time speed. Shortly press
MODE to switch speed information, showing as real time speed
(unit Km/h)→average speed (unit Km/h)→Max Speed (unit
Km/h)→real time speed.
Real time speed Average speed Max.speed

7
After turning on display, it shows ODO distance (unit KM) .Press
and hold MODE and DOWN together to switch the information,
showing as ODO (unit KM) →single trip distance (unit KM) →single
trip time →ODO (unit KM).
ODO Single trip Single trip time
Walk Assist
Press and hold DOWN to start walk assist status. The bike will keep
at an even speed output 6km/h. Release the button to exit walk
assist status. The screen shows walk mode flashing symbol.
Walk Assist Interface
Walk assist can only be working when you push the bike
and please do not start this function when riding.

8
Turn on Backlight
Press and hold UP for 2 seconds to turn on the backlight of display,
the e-bike headlight will be powered on at the same time. To turn
on LCD backlight when lack of light or riding in night. Hold UP for 2
seconds again, LCD backlight turns off.
Backlight and headlight interface
PAS level Selection
Press UP or DOWN to change the output power of the motor. The
power ranges from level 1 to level 5. Level 1 is the minimum
power. Level 5 is the maximum power. The default value is level 1.
PAS level interface

9
Battery Indicator
The 5 battery bars represent the capacity of the battery. When the
battery is in low voltage, battery frame will flash to notice that the
battery needs to be recharged immediately.
Battery voltage
Flashing at low voltage
Error code
When the e-bike’s electronic system is wrongly working, display
will show the error code. Please find the Appendix 1 for detail.
Error Code Interface
The error interface can exit only when the fault is eliminated, the
E-bike will not continue to drive after the failure.

10
Users Setting
Preparation before Starting up
Make sure all connectors tightened and the cables without
damage, power on the e-bike.
General Setting
Press MODE button to start the display, then hold both UP and
DOWN for 2 seconds to enter the setting menu.
Trip Distance and Trip Time Clearance
TC means trip distance clearance. Press UP or DOWN to choose Y
or N, Ymeans to clear the trip distance.
Trip distance and trip time will be cleared at the same time.

11
Backlight Brightness
BL means backlight. There are level 1, 2,3. Level 1 is the lowest
brightness, Level 3 is highest brightness. The default level is 1.
Press UP or DOWN to modify the backlight brightness.
Exit Setting
Shortly press MODE to confirm the input and enter into next
setting. Hold MODE to save the modification and exit the general
setting.
Password Setting
Hold both UP and DOWN for 2 seconds to enter normal setting
interface. Then hold both UP and MODE for 2 seconds to enter
power-on password setting.
On the screen shows “P 2”, this requests to input power-on
password. UP and DOWN is to change the number, and MODE is
to select digit one by one. After the 4 digits inputted, press MODE
to confirm. In case password correct, enter the Power-on
password enable interface, otherwise stays at the password

12
interface. The factory default password is : 1234.
Power-on password interface
Password Enable
Press UP/DOWN to select Y or N, and press MODE to confirm and
enter Password modify interface.
y = Power-on Password Enable
n = Power-on Password Disable
Password enable interface
Password Modification
PS means password. UP and DOWN is to change the number, and
MODE is to select digit one by one, finally to hold MODE to
confirm the modification and exit the setting state.

13
Password modification interface
Using Parameter Setting
Hold both UP and DOWN for 2 seconds to enter normal setting
interface. Then hold both DOWN and MODE for 2 seconds to enter
Using parameter setting.
On the screen shows “P 1”, this requests to input permission
password. UP and DOWN is to change the number, and MODE is
to select digit one by one, finally press MODE to confirm. In case
password correct, enter the Power-on password enable setting
interface, otherwise stays at the password interface. Hold MODE
to exit. The permission password is : 0512.
Using parameter setting interface

14
Wheel Diameter Setting
LD means wheel diameter. The set values are 16inch, 18 inch, 20
inch, 22 inch, 24 inch, 26inch, 700C, 28inch. Press UP and DOWN
to select the corresponding wheel diameter of E-bike to ensure the
accuracy of display speed and mileage. Press MODE to confirm and
enter into Speed limit setting.
Speed Limit Setting
LS means limit speed. The maximum riding speed of factory default
of display is 25km/h.Changing the value can set max.riding speed
of E-bike, when E-bike exceeds set value, the controller will stop
powering the motor to protect rider's safety.
The optional range of maximum speed setting is
12km/h-40km/h .Shortly press UP or DOWN to adjust limited
speed parameters, press MODE to confirm and exit the setting.
Speed limit setting interface

15
Personalized Parameter Setting
Personalized parameter setting can match variety requirements in
use. Setting items are: Battery indicator setting, PAS level setting,
Over-current cut, PAS sensor setting, Speed sensor setting and
Throttle function setting(optional) and System setting. In total six
items. For the details, please see the Attached List 3.
Personalized Setting Password Input
Hold both UP and DOWN for more than 2 seconds to enter normal
setting, then hold both UP and DOWN again to enter into
personalized parameter setting interface.
On the screen shows “P 3”, this requests to input permission
password. UP and DOWN is to change the number, and MODE is
to select digit one by one, finally press MODE to confirm. In case
password correct, enter the Power-on password enable setting
interface, otherwise stays at the password interface. Hold MODE
to exit. The permission password is : 2962.
Press UP/DOWN to select, and press MODE to enter the
corresponding setting page.

16
Option Select Page
Battery Indicator Setting
VOL means battery voltage. Each battery bar represents a voltage
value. 5 voltage values MUST BE entered one by one. Take the first
voltage for example, “1” on the screen means the first voltage,
“28.0” means the first battery voltage value. Press UP/DOWN to
select the value and MODE to confirm and enter into next voltage
setting. After all 5 voltages set, hold MODE to confirm and turn
back to personalized parameter setting interface.
Battery indicator voltage setting interface