SunDING SD-548C - User Manual

Sunding Bicycle Computer
SD-548C (14Functions)
FUNCTIONS
- SPD CURRENT SPEED
- ODO ODOMETER （0.001～99999km/m)
- DST TRIP DISTANCE
- MXS MAXIMUM SPEED
- AVS AVERAGE SPEED
- TM ELAPSED TIME .
- CLK CLOCK （12H/24H）
- SCAN
- “+” “－” COMPARATOR
- SETTING SPEED SCALE（km/h,m/h）
- SETTING TYRE CIRCUMFERENCE : （ 0mm ～
9999mm）
- SETTING THE LAST VALUE OF
ODOMETER/ODO
- FREEZE FRAME MEMORY
- AUTO ON/OFF
Computer Battery Installation
Remove the battery cover from the bottom of the computer
by using a flat blade screwdriver, install one CR2032
battery with the positive (+) pole facing the battery cover
and replace the cover. Should the LCD show irregular
figures, take out the battery and reinstall it.
Sensor Transmitter Battery Installation
Remove the battery cover
from the bottom of the
computer by using a flat blade
screwdriver, install one 23A
12V battery with the positive
(+) pole facing the battery
cover and replace the cover.
Should the LCD show
irregular figures, take out the battery and re-install it.
Sensor Transmitter
Attach the sensor transmitter to the left fork blade, the
distance between computer and the sensor can not exceed
60cm, the closer the batter. Using the shims to adjust the
diameter, and using the cable
ties(show below) to tie it with the
fork. Position the sensor
transmitter and magnet as shows,
make sure that the arc of the
magnet intersects the alignment mark on the sensor
transmitter with 1.5mm clearance.
Mounting Shoe
Attach the mounting shoe with the cable ties to the
handlebar, adjust the mounting shoe on the handlebar with
the shims to hold its position .
Computer
Attach the computer to the mounting shoe by sliding the
unit until it snaps firmly into its postion. To remove it, press
the button on it in the opposite direction.
To check for proper speed function and sensor alignment,
spin the front wheel with computer in speed mode. Adjust
the position of sensor and magnet when there is no or weak
reaction.
Wheel Size Input
‘2060’ appears on the screen when the battery has been
installed, with one figure flashing,choose the correct wheel
circumference from the table below.Press RIGHT button to
advance digits as needed and LEFT button to confirm and
advance. (The circumference ranges 0mm～9999mm), press
LEFT button to enter KM/M mode.
Setting（
（（
（km/h）
））
）/（
（（
（m/h）
））
）
Press the RIGHT button to choose km/h or
m/h. Press the LEFT button to enter
CLOCK mode.
CLK Mode(12H/24H)
In CLOCK Mode, press the LEFT button
for 3 seconds to enter 12/24H selection.
Re-press the LEFT button for 12/24
exchanging. Press the RIGHT button to
enter Hour setting mode, when the figure
indicating HOUR start to flash, press the LEFT button to
adjust it.
Continue to press the RIGHT button to enter Minute setting
mode, when the figure indicating MINUTE start to flash,
press the LEFT button to adjust it and RIGHT button to
confirm, press the RIGHT button again to ODO mode.
Setting the Last value of
Odometer
In ODO mode, press the LEFT button
for 2 seconds to set the ODO value,
its initial value is 0000.0. when one
figure flashing, press RIGHT button to adjust it and
LEFT button to confirm it and start to set the next
figure.(after re-install the battery, latest value can
be inputted according to the value exists before the
battery is re-installed).
Reset of Mileage Parameter
In ODO mode, press and hold both RIGHT and LEFT
button simultaneously for 3 seconds to clear the tire
circuference and (km/m) setting, The user need to reset the
tire circumference and (km/m), the original ODO value and
CLOCK will remain unaffected.
Speedometer
Speed is shown all the time on the screen, its maximum
reading is 99.9km/h(m/h), and it’s accurate to +/- 0.1km/h
(m/h).
Speed Comparator
During riding , ‘+’and ‘-’ indicates the current speed is
higher or lower than average speed(AVS) .
Odometer
In ODO mode , the total distance is
indicated on the screen, its mileage
range is 0.001 ～ 99999km(m). the
display will be back to 0 when value
exceeds its maximum limit, press the RIGHT button to enter
DST mode..
Trip Distance (DST)
In DST mode, the distance for one trip
is indicated on the bottom line. DST
ranges from 0.001～9999km(m), when
the value exceed the range limit, it
restarts from 0 automatically. Both the time and the
distance records will be cleared when the time of one trip
exceed the range limits.
press the LEFT button for 5 seconds to clear the records of
DST,MXS,AVS and TM.
Press the RIGHT button to enter MXS mode.
Maximum Speed (MXS)
In MXS mode, maximum speed is
indicated on the bottom line. Press the
LEFT button for 5 seconds to clear the
records of MXS,DST,AVS and TM.
Press the RIGHT button to enter AVS mode.
Average Speed
In AVS mode, average speed is
indicated on the bottom line. Press the
LEFT button for 5 seconds to clear the
records of AVS,DST,MXS and TM.
Press RIGHT button to enter TM mode.
Trip Time
In TM mode, trip time is indicated on
the bottom line.TM ranges 0 :00 :00～
99 :59 :59. It will be back to 0 when
value exceed the limits.
Press the LEFT button for 5 seconds to clear the records of
TM, DST,MXS and AVS.
Press the RIGHT button to enter SCAN mode.
SCAN
In Scan mode , DST, MXS, AVS and TM mode are
indicated in turn every 4 seconds.
Press the RIGHT button to enter CLOCK Mode.
Sleep Mode
If no signal has been inputted for 300 seconds, computer
will enter into Sleep Mode, and CLK value remains. It will
turn back to the former mode with all the data collected
when any signal is inputted or any button is pressed.
FREEZE FRAME MEMORY
Press the LEFT button in any time will enter into freeze
frame memory mode. Flashing TM data will appear on the
screen. Press the RIGHT button to view the records of DST,
MXS, AVS and TM.
Press the LEFT button to end it.
Buttons Instruction
Press the RIGHT button to choose any mode below :
ODO, DST, MXS, AVS, TM, SCAN（DST、MXS、AVS、
TM） and CLOCK. It’s unnecessary to press the LEFT
button except choosing the Freeze frame Memory mode.
In Freeze Frame Momery mode, press the RIGHT button,
several data will display, re-press LEFT button to turn back
to other modes.
Malfunctions and Problems
Malfunctions Problems
No speedometer
Improper magnet/sensor alignment
Distance between computer and
sensor transmitter exceed 60cm
Low battery voltage of sensor
transmitter or computer.
Short distance of
the transmitter or
no receiving
Lower battery voltage, need to
change for a new one.
Display Abnormal
figures
Too much Electromagnetic
interference around
Inaccurate value is
indicated
Improper input, such as wheel
circumference.
Slow display
response
Temperature exceeds operating
limits(0℃～55℃).
Black display
Temperature too high, or put in
direct sunlight for too long time.
Need take back to shadow place for
a period.
Weak display Poor battery contact or dead battery
Display shows
irregular figures
Take out battery and re-install it
after 10 seconds.
Sensor without
reaction
Put off the insulation film of the
sensor transmitter
Accessories
TIRE SIZE
CIRC
TIRE SIZE
CIRC
700c x 38mm 2180 26’’ x 2.25’’ 2115
700c x 35mm 2168 26’’ x 2.1’’ 2095
700c x 32mm 2155 26’’ x 2.0’’ 2074
700c x 30mm 2145 26’’ x 1.9’’/1.95’’ 2055
700c x 28mm 2136 26’’ x 1.75’’ 2035
700c x 25mm 2124 26’’ x 1.5’’ 1985
700c x 23mm 2105 26’’ x 1.25’’ 1953
700c x 20mm 2074 26’’ x 1.0’’ 1913
700cTubulari 2130 24’’ x 1.9’’/1.95’’ 1916
650c x 23mm 1990 20’’ x 1-1/4’’ 1618
650c x 20mm 1945 16’’ x 2.0’’ 1253
27’’ x 1-1/4’’ 2161 16’’ x 1.95’’ 1257
27’’ x 1-1/8’’ 2155 16’’ x 1.5’’ 1206
26’’ x 2.3’’ 2135

Summary

Product Functions and Features

Computer Battery Installation

Instructions for installing a CR2032 battery into the bicycle computer unit.

Sensor Transmitter Battery Installation

Instructions for installing a 23A 12V battery into the sensor transmitter.

Sensor Transmitter Mounting

Guidance on attaching the sensor transmitter to the bicycle fork using cable ties.

Component Mounting and Setup

Mounting Shoe and Computer Attachment

Instructions for attaching the mounting shoe to the handlebar and the computer to the shoe.

Wheel Size Input

Procedure for selecting the correct tire circumference for accurate speed readings.

Speed Unit Setting

How to choose between kilometers per hour (km/h) or miles per hour (m/h).

Clock Mode (12 H;24 H)

Steps to set the clock display to either 12-hour or 24-hour format.

Setting Odometer Value

Instructions for inputting the last recorded odometer value.

Parameter Reset and Data Display

Resetting Mileage Parameter

How to reset tire circumference and speed unit settings, preserving ODO and CLOCK.

Speedometer and Speed Comparator

Explanation of speed display, maximum reading, and comparison with average speed.

Odometer and Trip Distance

Details on total distance (ODO) and single trip distance (DST) display.

Maximum Speed and Average Speed

Information on displaying maximum speed (MXS) and average speed (AVS).

Trip Time and Scan Mode

Explanation of trip time (TM) display and how to cycle through modes in SCAN.

Advanced Features and Troubleshooting

Scan and Sleep Modes

How the device cycles through modes in SCAN and enters Sleep Mode.

Freeze Frame Memory

Accessing and viewing recorded data after stopping.

Button Operations Summary

Overview of button functions for mode selection and navigation.

Malfunctions and Problems

Common issues like no speedometer, slow response, or display errors and their solutions.

Included Accessories

List of items provided with the bicycle computer.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The Sunding Bicycle Computer SD-548C is a 14-function device designed to track various cycling metrics.

Function Description

The computer offers a comprehensive set of functions to monitor cycling performance and provide essential information:

• SPD (Current Speed): Displays the real-time speed of the bicycle.
• ODO (Odometer): Records the total distance traveled, with a range from 0.001 to 99999 km/m.
• DST (Trip Distance): Measures the distance covered during a single trip.
• MXS (Maximum Speed): Shows the highest speed achieved during the current trip.
• AVS (Average Speed): Calculates and displays the average speed for the current trip.
• TM (Elapsed Time): Tracks the duration of the current trip.
• CLK (Clock): Provides a 12-hour or 24-hour clock display.
• SCAN: Cycles through DST, MXS, AVS, and TM modes every 4 seconds.
• "+" "-" Comparator: Indicates whether the current speed is higher or lower than the average speed.
• Setting Speed Scale: Allows selection between km/h and m/h units.
• Setting Tyre Circumference: Enables input of the wheel circumference, ranging from 0mm to 9999mm, crucial for accurate distance and speed calculations.
• Setting the Last Value of Odometer/ODO: Allows users to input a previous odometer reading after battery replacement.
• Freeze Frame Memory: Stores trip data (TM, DST, MXS, AVS) at a specific moment.
• Auto ON/OFF: Automatically turns the device on or off to conserve battery.

Important Technical Specifications

• Odometer Range: 0.001 ~ 99999 km/m.
• Tyre Circumference Setting Range: 0mm ~ 9999mm.
• Speedometer Maximum Reading: 99.9 km/h (m/h), with an accuracy of +/- 0.1 km/h (m/h).
• Trip Distance (DST) Range: 0.001 ~ 9999 km (m).
• Trip Time (TM) Range: 0:00:00 ~ 99:59:59.
• Computer Battery: CR2032 (3.0V/2032).
• Sensor Transmitter Battery: 23A/12V.
• Operating Temperature Limits: 0°C ~ 55°C.
• Wireless Communication Range: Distance between computer and sensor transmitter should not exceed 60cm.
• Magnet Clearance: The wheel magnet should intersect the alignment mark on the sensor transmitter with 1.5mm clearance.

Usage Features

Computer Battery Installation: To install the computer battery, remove the battery cover from the bottom using a flat blade screwdriver. Insert one CR2032 battery with the positive (+) pole facing the battery cover, then replace the cover. If the LCD shows irregular figures, remove and reinstall the battery.

Sensor Transmitter Battery Installation: Similarly, remove the battery cover from the bottom of the sensor transmitter using a flat blade screwdriver. Install one 23A 12V battery with the positive (+) pole facing the battery cover, and then replace the cover. If irregular figures appear on the LCD, remove and reinstall the battery.

Sensor Transmitter Attachment: Attach the sensor transmitter to the left fork blade using cable ties. The distance between the computer and the sensor should not exceed 60cm. Shims can be used to adjust the diameter for a secure fit. Position the sensor transmitter and magnet as shown in the diagram, ensuring the arc of the magnet intersects the alignment mark on the sensor transmitter with a 1.5mm clearance.

Mounting Shoe: Attach the mounting shoe to the handlebar using cable ties. Adjust its position on the handlebar with shims for stability.

Computer Attachment: Slide the computer onto the mounting shoe until it snaps firmly into place. To remove, press the button on the computer in the opposite direction. To verify proper speed function and sensor alignment, spin the front wheel while the computer is in speed mode. Adjust the sensor and magnet positions if there is no or weak reaction.

Wheel Size Input: Upon battery installation, '2060' will appear with one flashing figure. Select the correct wheel circumference from the provided table. Use the RIGHT button to advance digits and the LEFT button to confirm and advance. The circumference range is 0mm to 9999mm. Press the LEFT button to enter KM/M mode.

Setting (km/h) / (m/h): Press the RIGHT button to choose between km/h or m/h. Press the LEFT button to enter CLOCK mode.

CLK Mode (12H/24H): In CLOCK Mode, press the LEFT button for 3 seconds to select 12/24H. Re-press LEFT to toggle. Press RIGHT to enter Hour setting mode; when the HOUR figure flashes, use LEFT to adjust. Continue pressing RIGHT to enter Minute setting mode; when the MINUTE figure flashes, use LEFT to adjust. Press RIGHT to confirm and again to enter ODO mode.

Setting the Last Value of Odometer: In ODO mode, press the LEFT button for 2 seconds to set the ODO value (initial value 0000.0). When a figure flashes, use RIGHT to adjust and LEFT to confirm, then proceed to set the next figure. This allows inputting previous odometer values after battery replacement.

Reset of Mileage Parameter: In ODO mode, press and hold both RIGHT and LEFT buttons simultaneously for 3 seconds to clear the tire circumference and km/m settings. The original ODO value and CLOCK will remain unaffected.

Speedometer: Speed is continuously displayed, with a maximum reading of 99.9 km/h (m/h) and an accuracy of +/- 0.1 km/h (m/h).

Speed Comparator: During riding, '+' or '-' indicates if the current speed is higher or lower than the average speed (AVS).

Odometer: In ODO mode, the total distance is shown. The range is 0.001 to 99999 km (m). The display resets to 0 if the value exceeds the maximum limit. Press RIGHT to enter DST mode.

Trip Distance (DST): In DST mode, the distance for one trip is shown on the bottom line. The range is 0.001 to 9999 km (m). It resets to 0 if the value exceeds the limit. Both time and distance records clear if the trip time exceeds range limits. Press LEFT for 5 seconds to clear DST, MXS, AVS, and TM records. Press RIGHT to enter MXS mode.

Maximum Speed (MXS): In MXS mode, the maximum speed is shown on the bottom line. Press LEFT for 5 seconds to clear MXS, DST, AVS, and TM records. Press RIGHT to enter AVS mode.

Average Speed (AVS): In AVS mode, the average speed is shown on the bottom line. Press LEFT for 5 seconds to clear AVS, DST, MXS, and TM records. Press RIGHT to enter TM mode.

Trip Time (TM): In TM mode, the trip time is shown on the bottom line, ranging from 0:00:00 to 99:59:59. It resets to 0 if the value exceeds the limits. Press LEFT for 5 seconds to clear TM, DST, MXS, and AVS records. Press RIGHT to enter SCAN mode.

SCAN Mode: In SCAN mode, DST, MXS, AVS, and TM modes are displayed in turn every 4 seconds. Press RIGHT to enter CLOCK mode.

Sleep Mode: If no signal is received for 300 seconds, the computer enters Sleep Mode, and the CLK value remains. It will return to the previous mode with all collected data when any signal is input or any button is pressed.

Freeze Frame Memory: Press the LEFT button at any time to enter Freeze Frame Memory mode. Flashing TM data will appear. Press RIGHT to view DST, MXS, AVS, and TM records. Press LEFT to exit.

Buttons Instruction: Press the RIGHT button to cycle through ODO, DST, MXS, AVS, TM, SCAN (DST, MXS, AVS, TM), and CLOCK modes. The LEFT button is primarily used for Freeze Frame Memory mode. In Freeze Frame Memory mode, press RIGHT to display various data, then re-press LEFT to return to other modes.

Maintenance Features

Troubleshooting Guide:

• No speedometer:
  • Check for improper magnet/sensor alignment.
  • Ensure the distance between the computer and sensor transmitter does not exceed 60cm.
  • Verify battery voltage of sensor transmitter or computer (low battery).
• Short distance of transmitter or no receiving:
  • Indicates low battery voltage; replace with a new one.
• Display Abnormal figures:
  • Could be due to too much electromagnetic interference nearby.
• Inaccurate value is indicated:
  • Check for improper input, such as incorrect wheel circumference.
• Slow display response:
  • The operating temperature might exceed limits (0°C ~ 55°C).
• Black display:
  • Temperature too high, or left in direct sunlight for too long. Move to a shaded area for a period.
• Weak display:
  • Poor battery contact or a dead battery.
• Display shows irregular figures:
  • Take out the battery and re-install it after 10 seconds.
• Sensor without reaction:
  • Remove the insulation film from the sensor transmitter.

Accessories: The device comes with a mounting shoe, sensor transmitter, battery (3.0V/2032), wheel magnet, and cable ties for installation.

SunDING SD-548C Specifications

General

Brand	SunDING
Model	SD-548C
Category	Desktop
Language	English