Tsubaki BDTM201 User manual

Sonic Belt Tension Meter
BDTM201 Operation Manual
Contents
6-1 How to input the unit mass
6-2 How to input the belt width or the number of belts (ribs)
6-3 How to input the value of span length
1. Precautions P1 7. Unit mass table of the
preinstalled belt
P10
P32. Brief summary, caution & check
points for the failure
8. Unit mass table of TSUBAKI
tooth shape timing belt
P10
P43. Measurement principle of BDTM201 9. The installation tension table of
the TSUBAKI timing belts
P11
P54. Explanation of the parts of BDTM201
main body
10. Specification of BDTM201 P12
11. Guarantee & Repair Guidelines P12
P75. Operation procedure of BDTM201
P96. How to input the data
This manual describes operation procedure of BDTM201.
Please read this manual thoroughly before for full use of functions.
Website
https://www.tsubakimoto.com
The logos, brand names, or product names in this operation manual are trademarks or registered trademarks of
Tsubakimoto Chain Co. in Japan and other countries.
Headguarters
3-3-3 Nakanoshima, Kita-ku, Osaka 530-0005 Japan

1
2
Danger
■Please read this precautions carefully. And Keep this manual
safe for future reference.
■These precautions are written to defend the user to keep
other people from harm, and to prevent other damages.
Please pay attention to these precautions.
■These signs indicate the level of danger which can be
expected by improper use.
1. Precautions
Imminently dangerous
situation, such as death
or severe injury
Warning
Can cause break down,
injury, and electric shock
Caution
Caution
Injury or physical damages
Things the user must NOT do.
Things the user must do.
Avoid keeping at the place where
much humidity, dust and high
temperature are present.
●Can cause the break down
Do not leave or use this sensor
in the direct sunlight or high
temperature place.
Do not put on an unstable place
like a sloping table.
●Can cause injury or breakdown
Please measure the tensile force
after confirming the machine has
been turned off.
Do not make strong impact or throw.
●Can cause breakdown and fire
Do not use this in a flammable
environment.
●Can cause an explosion or the fire
when using this near propane gas
or gasoline
Do not break down or change.
●Can cause injury
Even though the arm part of the
flexible arm sensor (standard) is a
flexible pipe, do not bend it at an
acute angle.Please do not bend it
close to the head of the sensor
(within 20mm from the sensor),
and also do not bend it at the
bottom of the sensor. For a cord
sensor, do not grab or twirl the
sensor or cord parts strongly.
Please turn off the power,
immediately right after you hear
a thunder noise and move to a
safety place.
●Can cause an electric shock
Do not put liquids such as water
or solvents on the meter. Do not
use the sensor in a wet or oily
environment.
Do not use solvents (thinner and
benzene, etc.) for maintenance.
Warning

1
2
Danger
■Please read this precautions carefully. And Keep this manual
safe for future reference.
■These precautions are written to defend the user to keep
other people from harm, and to prevent other damages.
Please pay attention to these precautions.
■These signs indicate the level of danger which can be
expected by improper use.
1. Precautions
Imminently dangerous
situation, such as death
or severe injury
Warning
Can cause break down,
injury, and electric shock
Caution
Caution
Injury or physical damages
Things the user must NOT do.
Things the user must do.
Avoid keeping at the place where
much humidity, dust and high
temperature are present.
●Can cause the break down
Do not leave or use this sensor
in the direct sunlight or high
temperature place.
Do not put on an unstable place
like a sloping table.
●Can cause injury or breakdown
Please measure the tensile force
after confirming the machine has
been turned off.
Do not make strong impact or throw.
●Can cause breakdown and fire
Do not use this in a flammable
environment.
●Can cause an explosion or the fire
when using this near propane gas
or gasoline
Do not break down or change.
●Can cause injury
Even though the arm part of the
flexible arm sensor (standard) is a
flexible pipe, do not bend it at an
acute angle.Please do not bend it
close to the head of the sensor
(within 20mm from the sensor),
and also do not bend it at the
bottom of the sensor. For a cord
sensor, do not grab or twirl the
sensor or cord parts strongly.
Please turn off the power,
immediately right after you hear
a thunder noise and move to a
safety place.
●Can cause an electric shock
Do not put liquids such as water
or solvents on the meter. Do not
use the sensor in a wet or oily
environment.
Do not use solvents (thinner and
benzene, etc.) for maintenance.
Warning

3
4
2. Brief summary, caution & check points for failure
3. Measurement principle of BDTM201
The sonic belt tension meter (BDTM201)is the
handy equipment which enables to measure
the tension accurately by analyzing sonic wave
without touching.
A sensor catches the produced
eruption of sound wave by pick the belt span.
After that, the high processing computer
analyzes it and shows the result on the screen
digitally.
When we make an impact on a belt between
pulleys, it starts to oscillate irregularly. The
belt gradually oscillates with its inherent
regular waveform, but this basic waveform
will be attenuated in a short while. Though
we did not have any simple devices for
picking up a period of such a waveform, we
can now do so fairly easily thanks to the
development of unique data processing
methods. A measured oscillation frequency
can be converted into a belt tension with the
formula on the right.
Thus, BDTM201 can display a more accurate
tension by incorporating a correction factor
obtained in calibration testing into data to be
input, though it may display a higher tension
than in actuality due to the rigidity of the belt
under specific conditions.
Calculation“To＝4×M×W×S2×f2×10-9”
 To：Tension
M：Unit mass
W：Belt width or number of ribs（wires）
S：Measured span length
f：Horizontal characteristic frequenc
（N）
（g/mm width × m length）
（
mm /R）
（
mm ）
（Hz）
■Brief summary
■Check points for the immeasurable state
［Failed to measure or the results were fluctuated significantly.］
ITEM
＊ Please inquire to us or the dealer where you purchased if the BDTM201 does not work after checking
the points above.
PRESUMED PRESUMED CAUSE CONFIRMATION PONT
"Error" shows up or
the measure mode
can not be engaged
or the red light on.
The unevenness of
the output level is
large.
●The measured
value changes
every time greatly
●The sensor
responds to the
background noise
keenly
●"0" is entered to the unit mass,
width & span
●Input the wrong frequency range
●Measured frequency exceeds
5000Hz or below 10Hz
●Battery drain
●The sensor attaches to a belt for
a moment
●Automatic gain adjustment is not
enough
●Check the entered data（Input
the correct number）
●The frequency displays, but the
tension does not measure
●Change the measurement
frequency range
（LOW（V）⇔STANDARD ⇔HIGH）
● Check whether the measurement
frequency exceeds 5000Hz or
not
●Battery drain
●Measure again keeping enough
distance so that the sensor does
not attach to a belt
●Turn off a power once at the
measurement place, then turn it on
（Turn on a power with
connected the sensor, then push
"MEASURE" button after one
second
）
Nothing shows up or
only measuring
processing sign
shows up from the
third time of
measurin
（Frequency mode）

3
4
2. Brief summary, caution & check points for failure
3. Measurement principle of BDTM201
The sonic belt tension meter (BDTM201)is the
handy equipment which enables to measure
the tension accurately by analyzing sonic wave
without touching.
A sensor catches the produced
eruption of sound wave by pick the belt span.
After that, the high processing computer
analyzes it and shows the result on the screen
digitally.
When we make an impact on a belt between
pulleys, it starts to oscillate irregularly. The
belt gradually oscillates with its inherent
regular waveform, but this basic waveform
will be attenuated in a short while. Though
we did not have any simple devices for
picking up a period of such a waveform, we
can now do so fairly easily thanks to the
development of unique data processing
methods. A measured oscillation frequency
can be converted into a belt tension with the
formula on the right.
Thus, BDTM201 can display a more accurate
tension by incorporating a correction factor
obtained in calibration testing into data to be
input, though it may display a higher tension
than in actuality due to the rigidity of the belt
under specific conditions.
Calculation“To＝4×M×W×S2×f2×10-9”
 To：Tension
M：Unit mass
W：Belt width or number of ribs（wires）
S：Measured span length
f：Horizontal characteristic frequenc
（N）
（g/mm width × m length）
（
mm /R）
（
mm ）
（Hz）
■Brief summary
■Check points for the immeasurable state
［Failed to measure or the results were fluctuated significantly.］
ITEM
＊ Please inquire to us or the dealer where you purchased if the BDTM201 does not work after checking
the points above.
PRESUMED PRESUMED CAUSE CONFIRMATION PONT
"Error" shows up or
the measure mode
can not be engaged
or the red light on.
The unevenness of
the output level is
large.
●The measured
value changes
every time greatly
●The sensor
responds to the
background noise
keenly
●"0" is entered to the unit mass,
width & span
●Input the wrong frequency range
●Measured frequency exceeds
5000Hz or below 10Hz
●Battery drain
●The sensor attaches to a belt for
a moment
●Automatic gain adjustment is not
enough
●Check the entered data（Input
the correct number）
●The frequency displays, but the
tension does not measure
●Change the measurement
frequency range
（LOW（V）⇔STANDARD ⇔HIGH）
● Check whether the measurement
frequency exceeds 5000Hz or
not
●Battery drain
●Measure again keeping enough
distance so that the sensor does
not attach to a belt
●Turn off a power once at the
measurement place, then turn it on
（Turn on a power with
connected the sensor, then push
"MEASURE" button after one
second
）
Nothing shows up or
only measuring
processing sign
shows up from the
third time of
measurin
（Frequency mode）

5
6
1.Press MEASURE button to set up auto trigger mode.
＊Initially is shown.
＊During measurement is shown.
The measurement starts after receiving a signal from a sensor
2.It will start measuring after selecting belt type and press MEASURE button.
3.After changing measuring frequency range, press MEASURE button for measuring changed
frequency range.
MEASURE
10
Thissensorhasnarrowpathofφ12.5mmandaction-pipewhichcansetasensorpositionhandily.
Itisbestusedwhenonecannotputthemainbodyonthefloor.
Flexiblearm
sensor
11
One-touch
connector
There is the hollow of a dent, insert a convex connector at the top.
To remove a connector, slide the joint part and pull out.
1
Power button Press the power button to turn BDTM201 on.
It will automatically turn off five minutes after the last measure.
2
●【To show the preinstalled mass】
The belt type is shown by pressing and holding the MASS button for one second or more.
And choose by UP or DOWN button and push MEASURE button for confirmation.
＊Showing unit : g/m.
＊CAT(rough standard), tension and frequency won't be shown without selecting belt type.
Selectbutton ●【Memory of measuring condition】
Press SELECT button to choose any desired input number displayed in power-on.
40 memory functions selectable from No. 0 to 39
＊To pass on, press SELECT button back to back, to jump in the number, press the wished
number directly on it.
Please press the number continuously to call out larger than the number ten.
4
WIDTH button ●Press WIDTH button for putting the width of the belt with numeric key.
＊Enter capacity: 000.1 - 999.9 mm/R
6
SPAN button ●Press SPAN button for putting the width of the belt span numeric key.
7
Hz button
（switching
frequency and
tension)
●Press Hz button for selecting frequency or
tension.
＊The mode changes every time this button is
pressed.
●Press Hz button more than one second to show
both records with tension and frequency.
8
0/RANGE
button（switch
frequency
range）
Press 0/RANGE button more than one second to change measurement frequency range.
HIGH…900〜5000Ｈｚ
STANDARD…10〜1000Ｈｚ
LOW（V）…10〜50Ｈｚ
＊Change to HIGH for measuring over 1000Hz
9
Becausethesizeofthissenorisanarrowpathofφ12.5mm,itismeasurableby
everyplaces.
Sensor
（Option）
12
4. Explanation of the parts of BDTM201 main body
Flexible arm sensor11
One-touch connector
1
Measure button
（Decision button）
10
Power button
2
●Cord type sensor
Sensor（Option）
12
OLED
3
Span button
7
Select button
（Call button of
measured results）
Power supply: Triple A type x 2 pieces
4
Hz button
（change a frequency ⇔tension）
8
LED
（Left: Red, Right: Green）
Width button
6
Mass button
5
O/Range button
Change a frequency range
9
UP/DOWN
button
5
S No 01
STANDARD
LOW（V）
HIGH
S No 01 P5M
RESULT
TEN N
S No 01 P5M
RESULT
FREQ Hz
Measured tension
S No 01 P5M
RESULT
FREQ Hz
TEN N
Measured tension & frequency
S No 01 P5M
FREQUENCY
CAT Hz
RES Hz
Frequency & Catalog frequency
S No 01 P5M
Tension & Catalog tension
Measured tension & Frequency
TENSION
CAT N
RES N
OLED
This displays
tension value
3
S No 00
M 9 9 9. 9 g/m
W 9 9 9 .9 mm/R
S 9 9 9 9 mm
S No 00 PX 2M
TENSION
99900 N
Measurement
frequency level
H : HIGH
S : STANDARD
L : LOW（V）
Memory No.
The measured result
In measurement of belt type
Battery residual quantity
【Overview of OLED showing pattern】
Note: This will be shown
pre-installation.
Unit mass belt width span indication example
●Tension numerical number is shown by three digits from
0.01 〜99,900.
●Frequency numerical number is shown by three digits
from 10.0 〜5,000 Hz.
●The red light and ERROR will be shown on the screen
when the result of the measure is out of the standard
range.
NOTE: If the standard range over occurs after the result is
shown, it beeps twice until the second measure.
●A battery type signature at the time of the battery
consumption is shown.
LOW BATT blinks on and off when the battery is low.
●OLED will turn off after no operation for 1 minute.
S No 02
PX 5M 4.1
PX 3M 2.0
01
03
02
PX 2M 1.4
5MASS button
By UP or DOWN button to choose
the range, and press
MEASURE button for confirmation.
Cordtype
（Standard）

5
6
1.Press MEASURE button to set up auto trigger mode.
＊Initially is shown.
＊During measurement is shown.
The measurement starts after receiving a signal from a sensor
2.It will start measuring after selecting belt type and press MEASURE button.
3.After changing measuring frequency range, press MEASURE button for measuring changed
frequency range.
MEASURE
10
Thissensorhasnarrowpathofφ12.5mmandaction-pipewhichcansetasensorpositionhandily.
Itisbestusedwhenonecannotputthemainbodyonthefloor.
Flexiblearm
sensor
11
One-touch
connector
There is the hollow of a dent, insert a convex connector at the top.
To remove a connector, slide the joint part and pull out.
1
Power button Press the power button to turn BDTM201 on.
It will automatically turn off five minutes after the last measure.
2
●【To show the preinstalled mass】
The belt type is shown by pressing and holding the MASS button for one second or more.
And choose by UP or DOWN button and push MEASURE button for confirmation.
＊Showing unit : g/m.
＊CAT(rough standard), tension and frequency won't be shown without selecting belt type.
Selectbutton ●【Memory of measuring condition】
Press SELECT button to choose any desired input number displayed in power-on.
40 memory functions selectable from No. 0 to 39
＊To pass on, press SELECT button back to back, to jump in the number, press the wished
number directly on it.
Please press the number continuously to call out larger than the number ten.
4
WIDTH button ●Press WIDTH button for putting the width of the belt with numeric key.
＊Enter capacity: 000.1 - 999.9 mm/R
6
SPAN button ●Press SPAN button for putting the width of the belt span numeric key.
7
Hz button
（switching
frequency and
tension)
●Press Hz button for selecting frequency or
tension.
＊The mode changes every time this button is
pressed.
●Press Hz button more than one second to show
both records with tension and frequency.
8
0/RANGE
button（switch
frequency
range）
Press 0/RANGE button more than one second to change measurement frequency range.
HIGH…900〜5000Ｈｚ
STANDARD…10〜1000Ｈｚ
LOW（V）…10〜50Ｈｚ
＊Change to HIGH for measuring over 1000Hz
9
Becausethesizeofthissenorisanarrowpathofφ12.5mm,itismeasurableby
everyplaces.
Sensor
（Option）
12
4. Explanation of the parts of BDTM201 main body
Flexible arm sensor11
One-touch connector
1
Measure button
（Decision button）
10
Power button
2
●Cord type sensor
Sensor（Option）
12
OLED
3
Span button
7
Select button
（Call button of
measured results）
Power supply: Triple A type x 2 pieces
4
Hz button
（change a frequency ⇔tension）
8
LED
（Left: Red, Right: Green）
Width button
6
Mass button
5
O/Range button
Change a frequency range
9
UP/DOWN
button
5
S No 01
STANDARD
LOW（V）
HIGH
S No 01 P5M
RESULT
TEN N
S No 01 P5M
RESULT
FREQ Hz
Measured tension
S No 01 P5M
RESULT
FREQ Hz
TEN N
Measured tension & frequency
S No 01 P5M
FREQUENCY
CAT Hz
RES Hz
Frequency & Catalog frequency
S No 01 P5M
Tension & Catalog tension
Measured tension & Frequency
TENSION
CAT N
RES N
OLED
This displays
tension value
3
S No 00
M 9 9 9. 9 g/m
W 9 9 9 .9 mm/R
S 9 9 9 9 mm
S No 00 PX 2M
TENSION
99900 N
Measurement
frequency level
H : HIGH
S : STANDARD
L : LOW（V）
Memory No.
The measured result
In measurement of belt type
Battery residual quantity
【Overview of OLED showing pattern】
Note: This will be shown
pre-installation.
Unit mass belt width span indication example
●Tension numerical number is shown by three digits from
0.01 〜99,900.
●Frequency numerical number is shown by three digits
from 10.0 〜5,000 Hz.
●The red light and ERROR will be shown on the screen
when the result of the measure is out of the standard
range.
NOTE: If the standard range over occurs after the result is
shown, it beeps twice until the second measure.
●A battery type signature at the time of the battery
consumption is shown.
LOW BATT blinks on and off when the battery is low.
●OLED will turn off after no operation for 1 minute.
S No 02
PX 5M 4.1
PX 3M 2.0
01
03
02
PX 2M 1.4
5MASS button
By UP or DOWN button to choose
the range, and press
MEASURE button for confirmation.
Cordtype
（Standard）

7
8
Set up the sensor. Choose an optimum sensor and fix in the main body
with one-touch connector.
1
Turnonpower. POWERbutton−PUSH No
No
No 00→No 01
No 01→No 02
No 00→No 02
2
Input No. by numerical keypad or
select button.
“SELECT”button −PUSH
【Number is forwarded sequentalty every time
“SELECT”button is pressed. 00→0１→･ ･→38→39
00→01→02→In addition, you can jump to any
designated number by pressing a number with
numeric key. 】
Selecting procedure
“SELECT”button −PUSH（1st time）
“SELECT”button −PUSH（2nd time）
electing procedure
“2”button −PUSH
When “SELECT” button is pressed during the
following procedure （during display of unit mass,
belt width, span length input, and measured value）,
the number being chosen is displayed.
3
EX: Select from 00 to No.02
Case of inputting a unit mass
manually.
Caseofinputtingtheunitmass
frombelttype.
EX:SelectP5M.
［See page 9 for input data.］
［See page 9 for input date.］
EX: Put 2.5g/mm wide x meter
long
Input the belt width.
EX: Put 25mm.
［See page 9 for input data.］
“MASS”button −PUSH
[Input the unit mass（g/mm W x m L） in the order of
blinking position on display screen by use of
numeric key. If you input wrong number, press
"MASS" button again to return the cursor to the
first.]
“0”button −PUSH
“0”button −PUSH
“2”button −PUSH
“5”button −PUSH
●"MASS"button−PUSH（holdingdownmore
thanonesecond）Belttypeisshownonscreenby
pressingMASSbuttonmorethanonesecond.
ByusingUPorDOWNbuttontoselectthe
belttype.
●"DOWN"button−PUSHPlacehighlighted
portiononP5M.
●"MEASURE"−PUSH
PX5Misdisplayedonscreen.
4-1
4-2
“WIDTH”button −PUSH
【Do the same step as the above 4-2. When data
above alIowable capacity is input, the cursor
returns to the first, and input of data is requested
again.】
“0”button −PUSH
“2”button −PUSH
“5”button −PUSH
“0”button −PUSH
5
Input the span length. “SPAN”button −PUSH
【Do the same step as the above 4-1.】
6
Procedure Description Operation Display screen
5. Operation procedure of BDTM201
S＝ □□□mm
『
Allowable input capacity:
0001〜9999mm』
W＝ □□.□mm/R
『Allowable input capacity:
000.1〜999.9mm』
W＝0 □.□mm/R
W＝02 .□mm/R
W＝025. mm/R
W＝025.0mm/R
M＝ □□.□g/m
『Allowable input capacity:
0.1〜999.9g/mm×m』
M＝0 □.□g/m
M＝00 .□g/m
M＝002. g/m
M＝002.5g/m
Shows frequency after
measurement of tension.
"Hz" button −PUSH
［Shows frequency corresponding to the measured
tension.
When "Hz" button is pressed once again, the display
returns to tension mode.］
8-2
S No 02
PX 5M 4.1
PX 3M 2.0
01
03
02
PX 2M 1.4
Shows tension. "Hz" button −PUSH
［Shows frequency corresponding to the measured
tension.
＊When "Hz" button is pressed once again, the
display returns to tension mode.］
8-1
Start measurement. Get sensor in central span of the measure object
without touching it.
"MEASURE" button −PUSH: LED（green）
blinks, shows .
To vibrate the wire, flip the belt span with a
finger etc.: shows .
The following measurement is performed by the
sensor receiving sound without use of measure
button from the second time.
Since measurement is started by the senor
receiving sound, it is started as well even by a
noise if it has a relatively stable sound pressure.
Result is shown as well as beep sound emitted
and LED（green）turns on in 0.2 second after
reception of belt vibration sound.
［After the second
measurement, please
notice that the screen
shows the data
previously measured.
And you hear the beep,
the new data will be
displayed on the
screen.］
7１
２
３
１
2

7
8
Set up the sensor. Choose an optimum sensor and fix in the main body
with one-touch connector.
1
Turnonpower. POWERbutton−PUSH No
No
No 00→No 01
No 01→No 02
No 00→No 02
2
Input No. by numerical keypad or
select button.
“SELECT”button −PUSH
【Number is forwarded sequentalty every time
“SELECT”button is pressed. 00→0１→･ ･→38→39
00→01→02→In addition, you can jump to any
designated number by pressing a number with
numeric key. 】
Selecting procedure
“SELECT”button −PUSH（1st time）
“SELECT”button −PUSH（2nd time）
electing procedure
“2”button −PUSH
When “SELECT” button is pressed during the
following procedure （during display of unit mass,
belt width, span length input, and measured value）,
the number being chosen is displayed.
3
EX: Select from 00 to No.02
Case of inputting a unit mass
manually.
Caseofinputtingtheunitmass
frombelttype.
EX:SelectP5M.
［See page 9 for input data.］
［See page 9 for input date.］
EX: Put 2.5g/mm wide x meter
long
Input the belt width.
EX: Put 25mm.
［See page 9 for input data.］
“MASS”button −PUSH
[Input the unit mass（g/mm W x m L） in the order of
blinking position on display screen by use of
numeric key. If you input wrong number, press
"MASS" button again to return the cursor to the
first.]
“0”button −PUSH
“0”button −PUSH
“2”button −PUSH
“5”button −PUSH
●"MASS"button−PUSH（holdingdownmore
thanonesecond）Belttypeisshownonscreenby
pressingMASSbuttonmorethanonesecond.
ByusingUPorDOWNbuttontoselectthe
belttype.
●"DOWN"button−PUSHPlacehighlighted
portiononP5M.
●"MEASURE"−PUSH
PX5Misdisplayedonscreen.
4-1
4-2
“WIDTH”button −PUSH
【Do the same step as the above 4-2. When data
above alIowable capacity is input, the cursor
returns to the first, and input of data is requested
again.】
“0”button −PUSH
“2”button −PUSH
“5”button −PUSH
“0”button −PUSH
5
Input the span length. “SPAN”button −PUSH
【Do the same step as the above 4-1.】
6
Procedure Description Operation Display screen
5. Operation procedure of BDTM201
S＝ □□□mm
『
Allowable input capacity:
0001〜9999mm』
W＝ □□.□mm/R
『Allowable input capacity:
000.1〜999.9mm』
W＝0 □.□mm/R
W＝02 .□mm/R
W＝025. mm/R
W＝025.0mm/R
M＝ □□.□g/m
『Allowable input capacity:
0.1〜999.9g/mm×m』
M＝0 □.□g/m
M＝00 .□g/m
M＝002. g/m
M＝002.5g/m
Shows frequency after
measurement of tension.
"Hz" button −PUSH
［Shows frequency corresponding to the measured
tension.
When "Hz" button is pressed once again, the display
returns to tension mode.］
8-2
S No 02
PX 5M 4.1
PX 3M 2.0
01
03
02
PX 2M 1.4
Shows tension. "Hz" button −PUSH
［Shows frequency corresponding to the measured
tension.
＊When "Hz" button is pressed once again, the
display returns to tension mode.］
8-1
Start measurement. Get sensor in central span of the measure object
without touching it.
"MEASURE" button −PUSH: LED（green）
blinks, shows .
To vibrate the wire, flip the belt span with a
finger etc.: shows .
The following measurement is performed by the
sensor receiving sound without use of measure
button from the second time.
Since measurement is started by the senor
receiving sound, it is started as well even by a
noise if it has a relatively stable sound pressure.
Result is shown as well as beep sound emitted
and LED（green）turns on in 0.2 second after
reception of belt vibration sound.
［After the second
measurement, please
notice that the screen
shows the data
previously measured.
And you hear the beep,
the new data will be
displayed on the
screen.］
7１
２
３
１
2

6. How to input the data
6-1. How to input the unit
mass（Refer to the unit
mass tables on next page）
●
●
●
Timing belt &（Reference）Flat timing belt
To input the unit mass is width（mm）×
length（m）in g/mm width × m Length.
1.Data capacity is 000.1〜999.9g/mm
width × m Length
2.Able to input with four significant digit
figures of three columns of integers and
decimal one column
Tooth belt from the pre-install data
Push "MASS" bottom more than one
second, belt type shows up on the screen.
With using "UP" or "DOWN" button to
select and push "MEASURE" to set.
（Reference）V belt, V-Ribbed belt, and Wire
Input the mass per meter of length in "g/m
length" for unit mass.
Able to input by four significant digits,
i.e. three digits of integer and one digit
below decimal point from 000.1 up to
999.9 g/m L. Unit mass corresponds to one
piece for V-belt and wire, and one rib for
V-ribbed belt.
6-2. How to input the belt
width or the number of
belts（ribs）
●
●
Timing belt &（Reference）Flat timing belt
To put the date is for belt width is
000.1mm〜999.9mm, three digits of
integer and one digit below decimal point
in mm.
（Reference）V belt, V-Ribbed belt, and Wire
For V belt and Wire, put one piece. For V
ribbed belt, put the number of ribs of
V-ribbed belt.
6-3. How to put the value of
span length
Span length is a distance between contacts
with pulley, and can be calculated by the f
following calculating formula.
Alternatively, measure the distance between
pulley contacts with a tape measure and put.
L ：Span length  （mm）
C ：Distance between axes （mm）
Dp ： Large pulley pitch outer diameter （mm）
dp：
Small pulley pitch outer diameter （mm）
L＝ C − （Dp−dp）
4
22
Flat timing
belt
V-Ribbed belt
V belt
Wire
g/mm W×mL
g/Ribbed×mL
g/one belt×mL
g/one belt×mL
mm
Number of
Ribbed
1
1
mm
mm
mm
mm
MASS WIDTH SPAN
9
10
Refer to the explanation of "MASS" button at page 6.
7. Unit mass table of the preinstalled belt
■Table2: For BDTM201 unit mass table
Data of unit mass can be input by four significant digits, i.e. three digits of integer and one digit
below decimal point in g/mm W x m L from 0.1 to 999.9 g/mm W x m L.
8. Unit mass table of TSUBAKI tooth shape timing belt
■Table1: Unit mass list of timing belts

6. How to input the data
6-1. How to input the unit
mass（Refer to the unit
mass tables on next page）
●
●
●
Timing belt &（Reference）Flat timing belt
To input the unit mass is width（mm）×
length（m）in g/mm width × m Length.
1.Data capacity is 000.1〜999.9g/mm
width × m Length
2.Able to input with four significant digit
figures of three columns of integers and
decimal one column
Tooth belt from the pre-install data
Push "MASS" bottom more than one
second, belt type shows up on the screen.
With using "UP" or "DOWN" button to
select and push "MEASURE" to set.
（Reference）V belt, V-Ribbed belt, and Wire
Input the mass per meter of length in "g/m
length" for unit mass.
Able to input by four significant digits,
i.e. three digits of integer and one digit
below decimal point from 000.1 up to
999.9 g/m L. Unit mass corresponds to one
piece for V-belt and wire, and one rib for
V-ribbed belt.
6-2. How to input the belt
width or the number of
belts（ribs）
●
●
Timing belt &（Reference）Flat timing belt
To put the date is for belt width is
000.1mm〜999.9mm, three digits of
integer and one digit below decimal point
in mm.
（Reference）V belt, V-Ribbed belt, and Wire
For V belt and Wire, put one piece. For V
ribbed belt, put the number of ribs of
V-ribbed belt.
6-3. How to put the value of
span length
Span length is a distance between contacts
with pulley, and can be calculated by the f
following calculating formula.
Alternatively, measure the distance between
pulley contacts with a tape measure and put.
L ：Span length  （mm）
C ：Distance between axes （mm）
Dp ： Large pulley pitch outer diameter （mm）
dp：
Small pulley pitch outer diameter （mm）
L＝ C − （Dp−dp）
4
22
Flat timing
belt
V-Ribbed belt
V belt
Wire
g/mm W×mL
g/Ribbed×mL
g/one belt×mL
g/one belt×mL
mm
Number of
Ribbed
1
1
mm
mm
mm
mm
MASS WIDTH SPAN
9
10
Refer to the explanation of "MASS" button at page 6.
7. Unit mass table of the preinstalled belt
■Table2: For BDTM201 unit mass table
Data of unit mass can be input by four significant digits, i.e. three digits of integer and one digit
below decimal point in g/mm W x m L from 0.1 to 999.9 g/mm W x m L.
8. Unit mass table of TSUBAKI tooth shape timing belt
■Table1: Unit mass list of timing belts
PX Belt PX Belt water proof type Ultra PX belt HC type Ultra PX belt oil proof type Ultra PX belt HY type
Type Unit mass Type Unit mass Type Unit mass Type Unit mass Type Unit mass
PX 2M 1.4 W 5M 3.5 HC 3M 2.2 HA 5M 3.4 HY 3M 2.6
PX 3M 2.0 W 8M 5.6 HC 5M 4.1 HA 8M 4.7 HY 5M 3.5
PX 5M 4.1 HC 8M 5.1 HA 14M 7.9 HY 8M 4.5
PX 8M 5.6 HC 14M 8.4 HY 14M 8.1
PX 14M 9.8
①PX Belt
Type P2M P3M P5M P8M P14M
Pitch（mm）2.000 3.000 5.000 8.000 14.000
Unit mass
(g/mm width×m length) 1.4 2.0 4.1 5.6 9.8
②PX Belt water proof type
Type P5M-W P8M-W
Pitch（mm）5.000 8.000
Unit mass
(g/mm width×m length) 3.5 5.6
③Ultra PX belt HC type
Type UP3M-HC UP5M-HC UP8M-HC UP14M-HC
Pitch（mm）3.000 5.000 8.000 14.000
Unit mass
(g/mm width×m length) 2.2 4.1 5.1 8.4
④Ultra PX belt oil proof type
Type UP5M-HA UP8M-HA UP14M-HA
Pitch（mm）5.000 8.000 14.000
Unit mass
(g/mm width×m length) 3.4 4.7 7.9
⑤Ultra PX belt HY type
Type UP3M-HY UP5M-HY UP8M-HY UP14M-HY
Pitch（mm）3.000 5.000 8.000 14.000
Unit mass
(g/mm width×m length) 2.6 3.5 4.5 8.1
Note: These unit masses are dierent from those used in BDTM101
（kg/m).
Unit mass：g/mm width×m length

11
12
9.The installation tension table of TSUBAKI timing belts
10. Specification of BDTM201
■Main Body
■Accessories
●BDTM201
●Option
●
●
Power Supply: Two triple A batteries. Alkaline
battery is recommended.
Overall Size: 160（H）× 59（W）× 26（D）
●
●
Mass: 120g
Temperature and humidity range for use and
storage: -10〜-50℃, 80%
（free from condensation）
1）Flexible type sensor
・Sensor outer diameter: 12.5mm
・Total length: 170mm
・Measurable frequency band: 10Hz〜5000Hz
2）Soft case for carrying
・ Capable of containing the body of tension meter,
flexible type sensor etc.
3）Two triple A batteries
4）Operation manual of BDTM201
5）Operating procedure sheet for carrying
6） Inspection acceptance certificate
7）Warranty
Cord type sensor
・Sensor outer diameter: 12.5mm
・Total length: 1m
・Measurable frequency band: 10Hz〜5000Hz
Abouttheinstallationtensionlevelofourtoothbelt,thegapwillnotoccurbetweenBDTM201measurementandtruetensionintherangeof
Note1andNote3.Soitisnotnecessarytosetatensioncompensatingrate.
Note1）Asforthemeasuringinstallationtension,setthebeltonthemachinefirstandmeasuretheaveragetensionofstretchandlooseside
ofthebeltafterspinningseveraltimestomakethemachinerunsmoothly.Ifbothspanshavethedifferenceofmorethan30%,
pleaseadjustthemandmeasureagain.
Note2）Measurewithaspanhavingthelengthmorethan20timesthetoothpitch.
（Becauseahighervaluethanactualisshowedattheshortrangetobeaffectedbytherigidityofthebeltitself.)
Note3）Useabeltwithatensionofatleast1/3oftherecommendedvalueforit.
（Becauseahighervaluethanactualisshowedatthelowtensiontobeaffectedbyrigidityofbeltitself.)
Notethatanextremelylowtensionmaynotbemeasured.
Forinstallationinalongspan,abeltshouldbeinstalledwithtensionclosetoitsmaximuminsomecases.Pleasecontactusfor
details.
Asforexperiencedmachinesinstallthebeltfollowingtheprocedureprovidedforacorrespondingmachine,itiscapableofmanaging
tensionbysettingcyclenumericalvaluewhichapprovedbyBDTM201afterward.
Thank you for choosing our sonic tension meter（BDTM201）.
We guarantee for one year for the main body and six months for the sensor.
If our sonic tension meter（BDTM201）fails due to a manufacturing or workmanship defect
during the period, we repair it free of charge.
Please contact our distributor from which you purchased for the repair.
（See the enclosed warranty.）
When the official approval is required, direct the sensor to a communicator
which emits stable frequency sound from 10 to 5000 Hz, and measure the same way as
measuring tension. The calibration is enabled easily.
In addition, we will calibrate your device for a fee, so please contact us or our sales
agents if needed.
11. Guarantee & Repair Guidelines
①PX belt
Type P2M P3M P5M P8M P14M
Belt width mm 4 6 10 6 10 15 10 15 20 25 15 20 25 40 60 40 60 80 100 120
Recommended 5.9 9.8 17 20 34 55 108 167 238 304 225 311 382 657 1040 990 1500 2110 2710 3340
Max. 7.8 13 23 26 46 74 147 225 323 412 294 406 510 860 1370 1310 2000 2810 3610 4450
②PX belt water proof type
Type P5M-W P8M-W
Belt width mm 10 15 25 15 25 40 60
Recommended 108 167 304 225 382 657 1040
Max. 147 225 412 294 510 860 1370
③Ultra PX belt HC type
Type UP3M-HC UP5M-HC UP8M-HC UP14M-HC
Belt width mm 6 10 15 10 15 20 25 15 20 25 40 60 40 60 80 100 120
Recommended 29 54 88 108 167 238 304 177 244 304 530 834 794 1200 1690 2170 2680
Max. 40 72 118 147 225 323 412 235 324 408 690 1100 1050 1600 2250 2880 3560
④Ultra PX belt oil proof type
Type UP5M-HA UP8M-HA UP14M-HA
Belt width mm 10 15 20 25 15 20 25 40 60 40 60 80 100 120
Recommended 108 167 238 304 177 244 304 530 834 794 1200 1690 2170 2680
Max. 147 225 323 412 235 324 408 690 1100 1050 1600 2250 2880 3560
⑤Ultra PX belt HY type
Type UP3M-HY UP5M-HY UP8M-HY UP14M-HY
Belt width mm 6 10 15 10 15 20 25 15 20 25 40 60 40 60 80 100 120
Recommended 39 67 104 125 200 265 355 255 347 445 730 1120 1020 1580 2140 2700 3260
Max. 47 80 125 165 260 350 460 290 394 510 840 1290 1225 1900 2570 3240 3915
Unit
：N
Unit
：N
Unit
：N
Unit
：N
Unit
：N

11
12
9.The installation tension table of TSUBAKI timing belts
10. Specification of BDTM201
■Main Body
■Accessories
●BDTM201
●Option
●
●
Power Supply: Two triple A batteries. Alkaline
battery is recommended.
Overall Size: 160（H）× 59（W）× 26（D）
●
●
Mass: 120g
Temperature and humidity range for use and
storage: -10〜-50℃, 80%
（free from condensation）
1）Flexible type sensor
・Sensor outer diameter: 12.5mm
・Total length: 170mm
・Measurable frequency band: 10Hz〜5000Hz
2）Soft case for carrying
・ Capable of containing the body of tension meter,
flexible type sensor etc.
3）Two triple A batteries
4）Operation manual of BDTM201
5）Operating procedure sheet for carrying
6） Inspection acceptance certificate
7）Warranty
Cord type sensor
・Sensor outer diameter: 12.5mm
・Total length: 1m
・Measurable frequency band: 10Hz〜5000Hz
Abouttheinstallationtensionlevelofourtoothbelt,thegapwillnotoccurbetweenBDTM201measurementandtruetensionintherangeof
Note1andNote3.Soitisnotnecessarytosetatensioncompensatingrate.
Note1）Asforthemeasuringinstallationtension,setthebeltonthemachinefirstandmeasuretheaveragetensionofstretchandlooseside
ofthebeltafterspinningseveraltimestomakethemachinerunsmoothly.Ifbothspanshavethedifferenceofmorethan30%,
pleaseadjustthemandmeasureagain.
Note2）Measurewithaspanhavingthelengthmorethan20timesthetoothpitch.
（Becauseahighervaluethanactualisshowedattheshortrangetobeaffectedbytherigidityofthebeltitself.)
Note3）Useabeltwithatensionofatleast1/3oftherecommendedvalueforit.
（Becauseahighervaluethanactualisshowedatthelowtensiontobeaffectedbyrigidityofbeltitself.)
Notethatanextremelylowtensionmaynotbemeasured.
Forinstallationinalongspan,abeltshouldbeinstalledwithtensionclosetoitsmaximuminsomecases.Pleasecontactusfor
details.
Asforexperiencedmachinesinstallthebeltfollowingtheprocedureprovidedforacorrespondingmachine,itiscapableofmanaging
tensionbysettingcyclenumericalvaluewhichapprovedbyBDTM201afterward.
Thank you for choosing our sonic tension meter（BDTM201）.
We guarantee for one year for the main body and six months for the sensor.
If our sonic tension meter（BDTM201）fails due to a manufacturing or workmanship defect
during the period, we repair it free of charge.
Please contact our distributor from which you purchased for the repair.
（See the enclosed warranty.）
When the official approval is required, direct the sensor to a communicator
which emits stable frequency sound from 10 to 5000 Hz, and measure the same way as
measuring tension. The calibration is enabled easily.
In addition, we will calibrate your device for a fee, so please contact us or our sales
agents if needed.
11. Guarantee & Repair Guidelines

Sonic Belt Tension Meter
BDTM201 Operation Manual
Contents
6-1 How to input the unit mass
6-2 How to input the belt width or the number of belts (ribs)
6-3 How to input the value of span length
1. Precautions P1 7. Unit mass table of the
preinstalled belt
P10
P32. Brief summary, caution & check
points for the failure
8.
Unit mass table of TSUBAKI
tooth shape timing belt
P10
P43. Measurement principle of BDTM201 9. The installation tension table of
the TSUBAKI timing belts
P11
P54. Explanation of the parts of BDTM201
main body
10. Specification of BDTM201 P12
11. Guarantee & Repair Guidelines P12 P75. Operation procedure of BDTM201
P96. How to input the data
This manual describes operation procedure of BDTM201.
Please read this manual thoroughly before for full use of functions.
Website
https://www.tsubakimoto.com
The logos, brand names, or product names in this operation manual are trademarks or registered trademarks of
Tsubakimoto Chain Co. in Japan and other countries.
Headguarters
3-3-3 Nakanoshima, Kita-ku, Osaka 530-0005 Japan