HOZAN C-738 User manual

INSTRUCTION
MANUAL
SPOKE TENSION
METER
C-738 Thank you for purchasing the HOZAN
C-738 SPOKE TENSION METER.
By controlling the spoke tension, you
can assemble the correct wheel and
diagnose wheel problems.
This product is special tool for
measuring the tension of
spokes used bicycle wheels.
The capacities of this tool is
written down on page ❶. Do
not use it for any other purpose.
Please check the package contents. ●Please read this entire instruction manual carefully before
attempting to place this product in service.
Please keep this instruction manual available for reference.
●Please attach this instruction manual when transferred or
lent for someone.
1
This symbol urges caution.
Make sure to read and follow
the rules and the instructions.

2
Contents
Identification of parts
Identification of parts ……………………………… 2-3
Safety Precautions ………………………………… 3-4
Operation …………………………………………… 4-9
Preparation for use ……………………………… 4-5
How to find the reference value ………………… 5-6
Main operation …………………………………… 7-9
Daily inspection …………………………………… 10
Maintenance / Storage method …………………… 10
Product disposal …………………………………… 10
Specifications ……………………………………… 11
C-738 Spoke tension meter Conversion table ……❶
Upper knob
Degital indicator
HOLD button ZERO button
ON/OFF button
Knob Screw
Guide plate BGuide plate A
Stopper pin
Probe
Fixed pivot
Handle
Battery case
Display

3
取扱説明書
Main unit Instruction manual
Identification of parts
Safety Precautions
Package contents
Checker
Coin type lithium battery
(for test operation)
Other necessary items
●Coin type lithium battery (CR2032)
The following symbols are displayed in this instruction manual.
These symbols are used throughout the instruction manual to alert the user to potential
safety hazards as follows:
Symbols that may
cause serious damage
Don't Do
No liquids
No disassembly
Not wet hands
May cause malfunction or inaccurate
measurement.
May cause injury, malfunction or
inaccurate measurement.
Do not use when the product is damaged,
deformed or markedly worn.
Do not leave the product in direct sunlight, in
a car under the scorching sun, near a fire, etc. May cause injury or malfunction.
Do not disassemble the product.
May cause electric shock.
Do not use with wet hands.
Do not use in a place where the product is
likely to get wet.
…Notice when incorrect handling could cause the user's death or serious injury.
…
Notice when incorrect handling could cause injury to the user or material damage.
Warning
Caution
Please read this safety precations carefully
before use to ensure correct use.
Even if the instructions do not have Caution mark, there are some possibilities for a
serious situation. Follow the instructions.
Warning

4
Safety Precations
Operation
Do not use for anything other than
adaptive spokes. May cause damege or malfunction.
Do not drop or hit the product. May cause injury, damege, malfunction
or inaccurate measurement.
Preparation for use
1. Pull out battery case from the
digital indicator.
Pull out while holding both sides of the battery case.
3. Insert the battery case to the digital
indicator.
Set the battery case "▼" mark as shown.
2. Set the coin type lithium battery
(CR2032).
Place the coin type lithium battery in the battery case
with the "PLUS(+)" side of the coin type lithium battery
facing the battery case.
How to insert the battery
Caution
Be sure to use the coin type lithium battery
(CR2032).
Do not touch with wet hands.
May cause electric shock,
injury or malfunction.
Caution

Do not pull the upper knob of the digital
indicator with strong force. It will be broken.
May cause malfunction.
5
Preparation for use
1. Set the position of guide plate B
to "CLOSE" as shown.
2. Press the ON / OFF button to turn
on the power.
Make sure the numbers are shown on the display.
3. Perform zero adjustment.
Press the ZERO button to set the number on the display
to "0.00mm".
Gently pull and release the upper knob at several times.
Zero adjustment is complete when "0.00mm" is displayed
stably.
4. Switch on and check the display.
Press the ON/OFF button.It is normal if the numbers
are shown on the display.
If you don't see the numbers on the display, please
open the battery case and check the direction of coin
type lithium battery or replace the coin type lithium
battery.
How to find the reference value
May cause inaccurate
measurement.
If the knob screw is loose, tighten it.
Guide plate B
Upper knob
Knob screw
By using the checker, it is possible to easily check whether the C-738 is measuring correctly.
You need to find the "reference value" before using the checker.
You should to measure it when using for the first time after purchase.
Operation
Caution
Caution

Fixed pivot
Checker
6
4. Set the checker as shown.
Hook the checker on the fixed pivot as shown.
6. Read the measured value on the display with the checker
and the stopper pin contacted.
This value is the reference value of your C-738 spoke tension meter.
Record it in the blank below.
This reference value is only for the product you purchased.
Daily inspections are performed using this reference value.
We do not have any records, so we cannot answer any inquiries you may have later.
5. Hook your finger at the position of
the arrow as shown and slowly push
the checker up until the checker
touches the stopper pin.
Hold the handle so that the main unit does not move.
How to find the reference value
Reference value mm
Stopper pin Guide plate A
May cause inaccurate
measurement.
Be careful not to leave the checker from the
guide plate A.
Operation
Caution

7
1. Use the checker to make sure you can measure correctly.
Measure according to the procedure on page 5 to 6 "How to find the reference value".
Compare the measured value with the reference value.
Acceptance Range：The reference value ±0.02mm.
2. Check the spoke and the conversion table.
Check the spoke type, cross-sectional shape, cross-sectional dimensions, and material.
Look for the spoke corresponded their contents in the conversion table (Refer to page ❶
at the end of the instruction manual).
3. Set the guide plate B according to the spoke type.
Turn the knob screw counterclockwise to loosen it.
Set the guide plate B as shown.
Turn the knob screw clockwise to fix the guide plate B firmly.
Main operation
Knob Screw
Guide plate B
Round plain spoke
Knob Screw
Guide plate B
Bladed or Butted spoke
If there is no corresponding
spoke in the conversion table,
you will not be able to determine
the tension value. However you
will be able to check the relative
condition of each spokes in
wheel.
Type
Images
Plain Butted Bladed
Shape Round Round
Ellipse / Oblong
Dimensions
Cross-
section
Material Stainless steel / iron
Aluminium
Operation

8
Main operation
For the bladed spoke, the value changes
depending on the contact direction.
Align the spoke perpendicularly.
Cross-Section of Spoke Cross-Section of Spoke
OK NG
Ex.) Round plain spoke
Guide plate A
Probe
Fixed pivot
Upper knob
Do not pull the upper knob of the digital
indicator with strong force. It will be broken.
May cause malfunction.
May cause inaccurate measurement.
4. Press the ON / OFF button to turn
on the power.
Make sure the numbers are shown on the display.
5. Perform zero adjustment.
Press the ZERO button to set the number on the display
to "0.00mm".
Gently pull and release the upper knob at several times.
Zero adjustment is complete when "0.00mm" is displayed
stably.
6. Place the C-738 aligning the spoke.
Hold the C-738 perpendicular to the wheel and hook the
spoke by the fixed pivot of C-738.
And position the C-738 so that the spoke contact the
surface of the guide plate A.
In the case if bladed spoke;
Sandwich the thinned surface between the fixed pivot
and the probe. Then contact the side of the spoke with the
guide plate A.
Caution
Operation
Caution
Guide plate A Guide plate A

9
Round plain spoke Bladed or Butted spoke
Main operation
May cause inaccurate
measurement.
Keep the C-738 so that the spoke contact the
surface of the guide plate A.
Also, keep the C-738 so that the side of the
guide plate B and the rim are in contact with
each other.
Do not press more the C-738 after contacting
the spoke with the stopper pin.
Stopper pin
May cause inaccurate measurement.
If the display shows a value other than "0.00 mm" when the C-738 is
separated from the spokes, adjust to zero and try the measurement again.
7. Slide the C-738 until the side of the guide plate B to the
position where it contacts the rim.
By making the measurement points the same, you can make stable measurement.
9. Read the measured value.
Read the measured value on the display with the spoke and stopper pin contacted.
10. Find the tension of the spoke using the conversion table.
Refer to page ❶at the end of the instruction manual.
8. Hold the wheel firmly and gently
press the C-738 until contacting with
the stopper pin as shown.
Operation
Caution
Caution

10
Storge method
●Keep away from high temperature, humidity and dust.
●Please store after rust prevention.
●If you do not use the C-738 for a long time, remove the battery.
May cause injury or damege.
Keep out of reach of children.
Maintenance and care
●If the numbers are not displayed or the value is not stable, replace with a new battery.
Follow local reguration when disposing.
Perform daily inspections for safe use.
Inspection items Inspection contents Handling
Display
Are the numbers shown on
the display? Are the numbers
stable?
If the numbers are not displayed or the value is
not stable, replace with a new battery.
Daily inspection
Maintenance / Storage method
Product disposal
Caution

20.09
Applicable Spoke Shape Spokes with the shape, size, and material described
in the conversion table.
Battery Coin type lithium battery (CR2032) x 1 pc
Dimensions 185（W）×1 8 0（H）×7 0（D）mm
Weight 380g
11
Specifications
1-2-12 Saiwaicho, Naniwa-ku, Osaka 556-0021, Japan
Tel : [phone] Fax : [phone]

❶
Aluminium
#12
（φ2.6）
#13
（φ2.34）
#13
（φ2.3）
#14-15-14
（φ1.8）
#15-16-15
（φ1.6）
3004.38 4.14 3.99 3.65 3.65 3.39 3.35 3.45 3.17 2.55 2.62 2.69 2.83 3.03 3.17 3.11 3.24 3.15 5004.47 4.25 4.13 3.83 3.82 3.60 3.58 3.63 3.41 2.87 2.92 2.97 3.07 3.28 3.38 3.34 3.45 3.40 7004.54 4.33 4.22 3.97 3.95 3.77 3.75 3.78 3.59 3.11 3.15 3.19 3.27 3.46 3.53 3.51 3.60 3.58 8004.56 4.37 4.26 4.02 4.00 3.83 3.81 3.84 3.66 3.20 3.24 3.28 3.35 3.53 3.60 3.58 3.66 3.66 9004.58 4.40 4.30 4.07 4.05 3.89 3.87 3.90 3.72 3.28 3.32 3.36 3.41 3.59 3.66 3.65 3.72 3.72
10004.61 4.42 4.33 4.11 4.09 3.94 3.92 3.95 3.78 3.35 3.38 3.42 3.47 3.65 3.71 3.70 3.77 3.78 11004.63 4.45 4.36 4.14 4.13 3.98 3.96 3.99 3.83 3.41 3.44 3.48 3.52 3.70 3.75 3.75 3.82 3.82 12004.64 4.47 4.39 4.18 4.15 4.02 4.00 4.03 3.87 3.46 3.49 3.52 3.56 3.74 3.79 3.79 3.85 3.87 13004.66 4.49 4.41 4.20 4.18 4.06 4.04 4.06 3.91 3.50 3.53 3.57 3.60 3.78 3.83 3.83 3.89 3.90 15004.69 4.52 4.45 4.25 4.23 4.12 4.10 4.11 3.97 3.57 3.61 3.64 3.67 3.84 3.89 3.89 3.95 3.97 17004.71 4.55 4.48 4.30 4.27 4.16 4.14 4.16 4.03 3.63
NOTE;Pleaserefertoourwebsiteforthelatestconversiontable.
Type：Plain, Diameter：2mmφ, Spoke manufacturer：HOSHI SPOKE, Measured value：4.09
The tension is 1000(N).
3.67 3.70 3.72 3.89 3.94 3.94 3.99 4.02
−
DTSWISS
−−
HOSHI SPOKE
−
HOSHI SPOKE
−
−
Type Plain Butted
Guide Plate B Close Open Cross- Sectional Shape Round Material Stainless steel / Iron
Dimensions
#14
（φ2.0）
#15
（φ1.8）
Measured value
Tension
(N)
Spoke manufacturer (reference)
Bladed
Open
Ellipse / Oblong
Stainless steel / Iron
0.9×1.9 0.9×2.2 1.0×2.2 1.0×2.7 1.3×2.2 1.3×2.8 1.4×2.3 1.4×2.4 1.5×3.8
C-738 Spoke tension meter Conversion table
【Example of tension conversion】