SZKTDZ KT-LCD8S User manual

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User Manual
KT-LCD8S E-Bike Special Meter

ELECTRIC BICYCLE METER KT—LCD8S Product User Manual
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ELECTRIC BICYCLE METER KT—LCD8S Product User Manual
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Contents
Preface……………………………………………………………………………..………. 4
Outlook and Size…………………………………………………………………………... 4
Meter Dimension …………………………………………………………………… 4
Button Box Dimension………………………………………………………………..5
Main Material and Color………………………………………………….………...... 5
Wiring Schematic……………………………………………………………….……. 5
Installation Instruction……………………………………………………………….…….. 5
Φ 31.8 handlebar diameters install icon………………………………………..….…6
Φ 22.2 handlebar diameters install icon……………………………………….….…. 6
Physical installation icon............................................................................................. 6
Function Overview……………………………………………………………………..….. 7
Display Content…………………………………………………………………….….…... 8
Button Definition…………………………………………………………………….….…. 8
Normal Operation………………………………………………………………………...... 8
On/Off…………………………………………………………………………........... 9
Display Interface………………………………………………………….….……..... 9
Display of Turned on Throttle……………………………………………………..... 10
ASSIST Ratio (or Throttle) Gear Switch……………………………….………… 11
Push Function…………………………………………………………..…………… 12
Cruise Function…………………………………………………………………...…12
Turn On/Off Backlight…………………………………………………….………... 13
Brake Status Display…………………………………………..…………….……… 13
Battery Capacity Indicator……………………………………..………………..........14
Motor Power and Temperature.....................................................................................15
Environment Temperature…………………………………………………………... 16
Single Data Clearing……………………………………………………………….... 16
Automatic Prompt Interface……………………………………………………..….. 17
Error Code Display…………………………………………………….…........ 17

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Motor Operating Temperature Alarm……………………………………......... 17
User Project Setting……………………………………………………………………..... 18
General Project Setting…………………………………………………………………… 18
Maximum Trip Speed………………………………………………………….......... 18
Wheel Diameter…………………………………………………………………..…. 19
Metric and Imperial Units…………………………………………………………... 19
Exit General Project Setting……………………………………………………….... 20
P Parameter Setting……………………………………………………………….…….... 21
P1 Motor Characteristic Parameter Setting ............................................................... 21
P2 Wheel Speed Pulse Signal Setting ....................................................................... 21
P3 Power Assist Control Mode Setting ...................................................................... 22
P4 Throttle Startup Setting ..................................................................................... 23
P5 Power Monitoring Setting ..................................................................................... 24
Exit P Parameter Setting ............................................................................................. 25
C Parameter Setting ............................................................................................................ 26
C1 Power-assist Sensor and Parameter Selection Setting ......................................... 26
C2 Motor Phase Classification Coding Setting .......................................................... 27
C3 Power-assist Ratio Gear Initialization Setting ..................................................... 28
C4 Throttle Function Setting .................................................................................. 29
C5 Controller Maximum Current Adjustment Setting ............................................... 30
C6 Backlight Brightness Adjustment Setting ............................................................. 31
C7 Cruise Function Setting ........................................................................................ 32
C8 Motor Operating Temperature Display Setting .................................................... 33
C9 Power-on Password Setting .................................................................................. 34
C10 Automatic Restore Default Setting ..................................................................... 36
C11 Attribute Selection Setting .................................................................................. 37
C12 Controller Minimum Voltage Adjustment Setting ............................................. 39
C13 ABS brakes of the controller and parameters of anti-charge control Setting ......40
C14 Power-assist Tuning Parameters Setting .............................................................42
L parameters Setting. ...................................................................................................43

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Exit Parameter Setting............................................................................................. 39
Parameter Copy .................................................................................................................. 45
User Setting Note ............................................................................................................... 47
Version Information……………………………………………………………………… 47

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Preface
The illustrated manual will help you understand and be familiar with the meter
function, guiding you on how to operate the meter, how to set the project parameters, how
to achieve the best match of the three as motor, controller and meter to improve electronic
control performance of the electric motor. This manual covers installation, operation,
parameter setting of the meter and how to use it properly, which help you resolve the
problems appeared in practical use.
Outlook and Size
○Meter Dimension
Meter Dimension

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Dual Bracket Mounting Dimension
○Button Box Dimension
○Main Material and Color
PC material is mainly used for KT-LCD8S meter and button box housing, and the
housing color is black.
○Wiring Schematic
Installation Instruction
The meter body and button box are mounted on the handlebars of the electric vehicle,
adjusting perspective. In the case that the vehicle is power off, the meter connectors are in
plug connection to corresponding controller connectors. Turn on the power, electric
vehicle and meter will be under normal operation, the meter installation is finished. The
protection film on meter display panel should be torn.

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○Φ 31.8 handlebar diameters install icon
○Φ 22.2 handlebar diameters install icon
○Physical installation icon

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Function Overview
KT-LCD8S meter provide you with a variety of functions such as vehicle controls and
vehicle status digitized displays to meet the trip demands.
◇Trip time display (with displays of a single trip time (TM) and total trip time (TTM));
◇Trip speed display (with displays of real-time speed (KM/H or MPH) and a single
maximum speed (MXS) and a single average speed (AVS));
◇Trip distance display (with displays of a single trip distance (DST) and total trip distance
(ODO));
◇Display of turned on throttle (THROTTLE);
◇Power assistant ratio (or throttle) gear (ASSIST) switch;
◇6KM/H power assistant push ( ) function;
◇Cruise function ( );
◇Battery capacity indicator ( );
◇Real-time battery voltage (VOL) display;
◇Motor power (MOTOR W) and temperature (MOTOR ℃) display;
◇Brake status display ( );

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◇Turn on backlighting and lights ( );
◇Environment temperature (℃or ℉) display;
◇Data clearing;
◇Fault code display;
◇User parameter setting;
◇24V, 36V, 48V supply voltage can automatic identification and be compatible.
Display Content
The display content is shown as follow.
Button Definition
KT-LCD8S meter adopts the structural form with part design between the main part
and operating buttons.
There are three keys on the operating panel of button box, which are icons of
button (alt text UP), button (alt text SW) and (alt text DOWN).
Button Box and Operating Panel
Normal Operation

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○On/Off
Hold button (SW) long, the meter is powered on and into normal operation, and
it provides the controller with power supply. Under normal operating status, hold
button (SW) long, the meter is powered off, meanwhile to shutdown the power supply of
controllers. When the vehicle is stopped and without any button operation on the
meter for five minutes, the meter will automatically shut down, and the power supply
of the electric vehicle will be powered off. In power off mode, the power consumption of
the meter and controller is zero.
○Display Interface
Hold button (SW) long, the meter is startup to enter display 1.
Display 1
In display 1, hold button (SW) shortly to enter display 2.

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Display 2
In the riding mode after 5 seconds, display 2 automatically jump to display 1
In display 2 , hold button (SW) shortly again to enter display 3.
In each display interface, if you hold button (SW) long, the meter will be
powered-off together with that of the controller.
○Display of Turned on Throttle
Rotate the throttle control handle under normal operating of the meter, the display
interface shows the logo of turned-on throttle, see the Figure below.

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○PAS Ratio (or throttle) Gear Switch
Under normal operation, hold button (UP) or button (DOWN) to
switch the power assist ratio (or throttle) gear (ASSIST), changing motor output power.
Switching range is 1-5 gear (this can also be configured according to the customer
requirements), gear 1 is for the lowest power, and gear 5 is for the highest power.
At every startup, the meter will automatically restore gear (this can also be
configured as required by users) when it was at last shut down. When the power
assist ratio is gear 0 zero, there’s no power assist function.

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○Power Assistant Push Function
Users can use 6KM/H power assist function when pushing vehicles. Hold
button (DOWN), the meter assist function logo ( ) flashes, the vehicle drives at the speed
of no more than 6km/h. Release button (DOWN), the assist function will be
revoked.
○Cruise Function
When C7 parameter setting is 1 (see C parameter setting), the meter turns on cruise
function, hold button (DOWN) long to enter the cruise status when the vehicle
speed is more than 7 km/h, and the cruise function logo (CRUISE) lights. Brake or hold
any button to revoke cruise function.

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○ Startup Backlights and Headlights
Hold button (UP) long, the meter turns on the backlights as well as the vehicle
headlights (the Controller should have headlights driving and output functions), meter
backlighting and vehicle lights power logo ( ) light, hold button (UP) long again
to turn off backlights and vehicle headlights.
○Brake status display

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Under normal operation, vehicle brake, brake status indicator display ( ), as
shown in the figure.
○Battery Capacity Indicator
The meter can automatically identify 24V, 36V, 48V battery capacities when it is
supporting use with the specified controller. When the battery capacity is over 70%, the
four power displays of the meter are lit, when the battery capacities drop, the four power
displays are off in order, when the power capacity is less than 15%, the four power
displays are totally turned off.
When the controller is power off due to voltage shortage, the power display frame
flashes, indicating the vehicle has been in voltage shortage and waiting for shutdown
currently.

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Voltage shortage flashes
Battery capacity indicator
○Motor Operating Power and Temperature
Under the riding status of vehicle, the motor real time running output power can be
known via the meter displays.
When C8 parameter setting is 1 (see C parameter setting), the meter turns on motor

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operating temperature display function.
○ Environment Temperature
After startup, the environment temperature for using meter will be displayed in
environment temperature display column.
The temperature display value may be in deviation shortly after boot-up, and the
display value will be gradually approaching the environment temperature within 10
minutes after boot-up.
○Single Data Clearing
5 seconds after the meter is powered on, at display 1, hold both the button (UP)
and the button (DOWN) simultaneously for about 2 seconds, the single trip time
(TM) and single trip distance (DST) flicker, then hold button shortly (SW), the
record contents of both will be cleared.

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Under the status of data flashing, if there were no operations on the data within 5
seconds, the meter will automatically return to display1 after 5 seconds, and the
original record content will be saved.
○Automatically Prompt Interface
Error Code Display：
When the electronic control system of the electric vehicle fails, and the meter will
automatically display (flicker) fault code. You can’t exit the fault code display only the
fault is removed.
Error Code & Definition Table：
Error Code
Definition
Motor position sensor fault!
Failure of electronic control system
THROTTLE fault!
Malfunction of the operation
Motor operating temperature alarm：
Under any interface, when the motor operating temperature exceeds the warning value,
the motor operating temperature display flashes to alarm, meanwhile, the controller will
offer the appropriate protection to motor.

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User Setting Project
KT-LCD8S meter user setting project：
◇General project setting
◇P parameter setting
◇C parameter setting
General Project Setting
○Maximum Trip Speed
Under power off status, hold button long (SW), the meter is turned on. Within
5 seconds after boot-up, hold button (UP) and button (DOWN)
simultaneously for about 2 seconds, the first is to enter the maximum riding speed setting
interface, press button shortly (SW) ,then the speed display column flashes. Press
button shortly (UP) or button (DOWN) in order to set the maximum riding
speed value. The default maximum riding speed value was 25KM/H. When the speed of
the electric vehicle exceeds the set value, the motor will be stopped driving.
Under the setting maximum riding speed interface, if there’s no button operation
on the meter for more than 1 minute, and then the meter will automatically return to
display 1, and the original set values will be saved.
After finishing the maximum riding speed setting, press button shortly (SW) ,