Manual Sunding SD-538 Cycling Computer
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Manual
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Sunding Bicycle Computer
SD-548A（
（（
（16Functions）
））
）
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
- TEMPERATURE (-10℃
℃℃
℃~70℃
℃℃
℃)
- MAINTENANCE ALERT
- 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 an AG13 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.
Speedometer Sensor
Attach the speedometer sensor bracket to the left fork blade, using the
shims to adjust the diameter, and using the cable ties (show below) to
tie it with the fork. Position the sensor and magnet as show; make
sure that the arc of the magnet intersects the alignment mark on the
sensor with 1mm 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.
Sensor Wiring
Route the sensor wire up the fork
blade, using cable ties to secure it
at the bottom and crown to avoid it
hinder the movement of the front
wheel.
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 Maintenance
mode.
Maintenance Alert
The original value for Maintenance Alert is
600(km/m), with one figure flashing, press the RIGHT button to
select 200/400/600/800(km/m).
Function : the wrench signal appears when it reaches the settled
mileage limits. Press the LEFT button to cancel it and 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, re-press RIGHT button 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, 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 circumference value and
cancel (km/m) & Maintenance Alert setting. The user need to reset
the tyre circumference, (km/m) & Maintenance Alert, 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 is 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 0～99999km(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 limited.
press the LEFT button for 5 seconds, the computer will 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 T (thermometer) mode.
The Thermometer
Exterior temperature is indicated on the bottom line, default
measurement unit is ℃(Celsius Degree), press the LEFT button for 3
seconds to make it flash, and press the RIGHT button can transfer it
to F(Fahrenheit Degree) mode, then press LEFT button to confirm it.
The Temperature ranges -10℃~70℃, and it is accurate to 0.1℃, error
margin is ±0.1℃.
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 then 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 TM,AVS,MXS,DST.
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）Temperature, 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
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 back to
shadow place for a period.
Weak display Poor battery contact or dead battery.
Display shows
Irregular figures
Take out battery and reinstall it after 10
seconds.
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
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Specifications
| Brand | Sunding |
| Model | SD-538 |
| Category | Cycling Computers |
| File type | |
| File size | 0.29 MB |
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Frequently Asked Questions about Sunding SD-538 Cycling Computer
Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.
Why do I need to enter the size of my wheel? Verified
To calculate the traveled distance, the cycling computer uses the number of revolutions. The number of revolutions multiplied by the size of the wheel equals the traveled distance.
This was helpful (4117) Read moreHow many miles is one kilometer? Verified
One kilometer equals 0,621 mile. Ten kilometers makes 6,21 miles. One mile equals 1,609 kilometer. Ten miles makes 16,09 kilometers.
This was helpful (704) Read moreA battery in my device is oxidized, can I still safely use it? Verified
Ja, the device can still be safely used. Firstly, remove the oxidizd battery. Never use bare hands to do this. Then clean the battery compartment with a cotton swab dipped in vinegar or lemon juice. Let it dry and insert new batteries.
This was helpful (702) Read more
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