Tohnichi M-DW User manual

To customers:
Before using this product, please read this operating instruction carefully to use it properl y.
If you have any question, please contact your nearest distributor or
TOHNICHI MFG. CO., LTD. This operating instruction should be stored in a safe place.
Tohnichi torque wrench with LS type
Digital Angle Module
Model M-DW
Angle Display Module
M-DW
DW QL100N (QL100N torque wrench with M-DW )

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Contents
Overview
Functions
Usage
Cautions on safety
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ １
１ ．
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
２
２ ．
Features
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
２
２
３ ． Specifications
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
４ ． Names of Parts ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
３
５ ．
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
４
６ ．
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
５
５
７ ． Battery Replace
me nt
・
・
・
・
・
・
・
・
・
・
・
・
８ ． Attaching to LS Torque Wrench
・
・
・
・
・
６
・
・
・
・
・
・
・
・
・
・
・
・
８
９ ．
Precautions for Use
９
１ ０ ．Error Messages
・
・
・
・
・
・
・
・
・
Cautions on Safety
Warning
・ The torque used during tightening work should be less than the maximum torque of
the attached torque wrench.
・ Consider the environment of the workplace.
・ Do not use the main body in the a moist or wet place.
Failure to observe this may result in electric shock or smoking.
Keep the workplace well illuminated.
・ Working in a dark place may cause an accident.
・ Do not use the product in a place exposed to a combustible liquid or gas.
Failure to observe this may result in an explosion or a fire, causing an accident.
・ Use specified accessories and options.
Failure to observe this may cause an accident or an injury.
Cautions
(1) Use only the specified battery.
(2) When not using the product for a long period of time, store it with the battery removed.
(3) Do not give vibrations or a shock to the product.
(4) Use the product only in the working environment mentioned in the operating instruction.
(5) Before use, carry out daily inspection to check the settings.
(6) Note that if the product is wetted with water or oil, it may result in trouble or burnout.
(7) Note that if the product is dropped or hit, it may result in damage and trouble.
(8) Use the product within the measurement range mentioned in the operating instruction.
(9) Be sure to conduct periodic inspection on the product.
If the product emits a foul odor or ignites during use, stop using it immediately,
move this measuring instrument to a safety place, and contact TOHNICHI MFG. CO., LTD.
1

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１ ． Overview
２ ． Features
３ ． Specifications
The M-DW is digital an angle module is designed to be attached to our torque wrench
with limit switch. The LS type torque wrench can be used as an angle
wrench by attaching this module. An angle from the setting torque of the torque
wrench is measured.
・ Easily attachable to our LS type torque wrench.
・ Capable of easily measuring a tightening angle from the setting torque of the torque wrench.
・ Bright and easy-to-see 7-segment LED for clear reading of a display value in a dim place.
・ Provided with only one operation key for simple operation.
M-DW
Angle Range
0 〜 999°
Specifications
1 d i g i t
1°
Angle Accuracy
± 2 ° + 1 d i g i t ( A n g u l a r v e l o c i t y i s 3 0 t o 1 8 0 ° / s e c . w h e n t h e b o l t i s t u r n e d t o 9 0 ° )
Display
7 - s e g m e n t L E D , 3 d i g i t s / C h a r a c t e r h e i g h t : 1 0 m m
Co n tin u o u s O p er a tio n A p p r o x . 6 0 h o u r s
Operating
0 t o 4 0 ° C , 8 5 % H R o r l e s s
( n o c o n d e n s a t i o n )
Environment
Limit switch with connector: 1 pc
Standard
Accessories
Screws & washers: 2 pcs. each
Operating Instruction 1 manual,
AA-size battery： 1 pc.
Exam ple M-DW is attached to a click type torque wrench,QL
Torque accuracy± 3％
A n g le M eas u rin g Ran g e [° ]
Torque Range [N･m]
Model
MIN〜MAX
1 d i g i t
MIN〜MAX
G r a d
DWQL50N
(5) 10 〜 50
0.5
DWQL100N
(10) 20 〜 100
1
DWQL140N
(25)30 〜 140
1
0 〜 999
1
DWQL200N
(30) 40 〜 200
2
DWQL280N
(30) 40 〜 280
2
DWQL420N
(40) 60 〜 420
2
※Parenthesized torque graduation values are m inim um possible setting values of snug torque.
However, there is no assurance for the accuracy of the m inim um
possible setting values.
※ The M-DW can be attached to other LS type torque wrenches than the above-m entioned.
(Not attachable to the QSPCALS, ALS, ACLS,MS type torque wrenches, SPLS8N, and RSPLS8N)
W hen attaching to a special LS type torque wrenches, see “9. Precautions for Use”.
※ If the M-DW and the LS type torque wrench are purchased separately
and attached, the torque graduation m ay not be adjusted to the parenthesized values depending
on the adjustm ent condition of the LS type torque wrench.
The torque used during tightening work should be less than the m axim um torque
of the attached torque wrench
2

55.5
４ ． Names of Parts
69
φ27
③Battery Cap
M o d ule F i x i n g S cr e w
①Display
16.5
（ ２ pc.）
21.5
②POW ER(C) Key
①Display
Displays an angle value.
② POWER (C) key
1.To turn on,press this key,wen turn off press this key more 2 seconds.
2.If this key is pressed while on the angle displays, the angle value will be cleared to 0.
If pressed with the display turned off, the display is turned on. If held down for 2 seconds
or longer with the display turned on, the display is turned off.
③Battery cap
This is a battery replacement cap. (Right-handed screw)
Standard Accessories
Module Fixing Screw
Washer.
Ｍ２ ｘ 10 （ 2 Pc.）
Limit switch With connector
Ｍ２ washer.（ 2 pc.）
3

of the unused state
sp
５ ． Functions
①Angular velocity check and zero correction function
When the power is turned on, angular velocity is checked to make zero correction.
Unless the torque wrench is standstill at that time, “Er0” appears, repeating the
angular velocity check. If “Er0” does not disappea r, see “10. Error Messages ”.
Angular velocity zero correction is automatically made when the standstill state
continues for 2 seconds or longer while the display is being turned on.
Checking the angular velocity
Error display
In use
Momentarily displayed while correcting
the angular velocity.
②Power-saving function
The M-DW is automatically placed in the power-saving mode when it is not being used
(when not operating the key or activating the torque wrench).
The power-saving mode includes 3 phases which work as shown in the following table.
Status
１ ． Lower display brightness
２ ． Standby
３ ． Shutdown
Di表示 lay
Display turned off
Display dim m ed
Blinking
1-minute continuation
10-m inute continuation
Prere q uisite
5-second continuation
of the unused state
of the unused state
Press the POWER (C) key or
Resetting
Press the POWER (C) key.
Press the POWER (C) key.
Method
activate the torque wrench.
T h e d is p la y is b rig h te n e d . T h e a n g le d is p la y
The display is turned on.
The display is turned on
Operation
is c le a re d w h e n re s e t b y th e P O W E R (C ) k e y.
(The angular velocity is not
to check the angular velocity.
upon
M e a s u re m e n t is c o n tin u e d w h e n th e to rq u e
checked.)
Resetting
w re n ch is a c tiv a te d .
③Remaining battery capacity display function
Once the remaining battery capacity is running out, a display value blinks.
If it discharges further, a bar display appears, disabling the battery.
Once the display starts blinking, replace the battery as soon as possible.
Blinking
Bar display
4

６ ． Usage
① Attach the M-DW to the LS type torque wrench. See “8. Attaching to the LS Type Torque
Wrench”. This step is not required if you have purchased an integrated torque wrench.
②Adjust the setting torque of the torque wrench to the snug torque.
See the “Operating Instruction for Torque Wrench”.
③Set the specified AA-size battery in the main unit. See “ 7.Battery Replacement ”.
④Peel off the protective sheet from the display.
⑤ Pressing the POWER (C) key turns on the power and makes angular velocity zero point
correction at the same time. Place the torque wrench standstill in a stable place. Unless
it is standstill, “Er0” appears, continuing angular velocity correction.
⑥Once the torque wrench is applied with a load and reaches the snug torque, it is activated.
If it is further rotated, it counts the angle.
* Even if it is ratcheted halfway, the angle is additionally counted.
⑦Seeing the angle display, tighten up to the specified angle.
⑧After untightening, press the POWER (C) key to clear the angle display.
７ ． Battery Replacement
The product is made available by setting one AA-size battery in the main unit.
When setting the battery, take care of the polarity, and securely close the battery cap.
See the figure below.
Commercially available nickel-hydrogen rechargeable battery and alkaline battery are
both available. If the alkaline battery is used, however, the battery characteristics may
not be fully exhibited.
* The nickel-hydrogen rechargeable battery and the alkaline battery have different
cut-off voltages.
The product has been designed for the cut-off voltage of the nickel-hydrogen
rechargeable battery which is repeatedly available in view of the environment.
For this reason, the alkaline battery may become useless before it has been fully
consumed.
AA-size Battery
Battery Cap
Setting the battery
Removing the capOPEN
CLOSE
5

８ ． Attaching to LS Torque W rench
１ ． Loosen 4 LS cover setscrews,
LS Cover
and open the LS cover.
Screw
4 pc.
①
２ ． Here are two set of tapped hole for
m ounting the lim it switch, so m ake
m arks on the switch base as shown in
Screw
Screw
the figure at right to check the position
where the limit switch has been mounted.
Then loosen the two limit switch fixing
Lim it Switch
screws and remove the limit switch.
Switch Base
Marking Example
②
Marking Example
３ ． Mount the limit switch with connector
Tightening Torque T = 25 cN･m
using the screws and washers ,
matching the switch to the
Apply Screw Locking Agent
position marked. Apply screw locking agent
(ThreeBond TB1324N recommended)
on the screw threads, and use a torque
Washer
screwdriver to carry out the tightening.
③
6

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４ ．After replacing the limit switch with connector, check
the continuity utilizing a tester.
If the lever of the limit switch with connector is pressed too strongly it will cause damage,
and if the pressing amount is insufficient the switch will not operate normally.
OK
(Appropriate)
Click!
NG
too close
During
Before Operation
Operation
④
NG
too distant
５ ． Insert the connector of the limit switch
Connector Inserting Slot
into a connector inserting slot in
the board.
⑤
Tightening Torque
６ ． Attach the digital angle module in such
T= 270cN・ m
a manner that the wiring will not be caught.
Tighten the two module fixing screws with
T = 270 cN•m.
⑥
７ ． Turn on the display, and when the display is dimmed after 5 seconds
or more, activate the torque wrench. If the display is brightened,
it indicates that assembly has been properly done.
7

９ ． Precautions for Use
●Use the digital angle module in such a manner that it will be perpendicular to
the rotation axis of the bolt. Otherwise, the angle cannot be accurately measured.
The product is not available for the LS type torque wrench where it cannot be
attached in a perpendicular manner.
NG
the rotation axis of the bolt
OK
●Firmly fix a workpiece. If it turns during measurement,
a measurement angle goes out of order.
NG
●About ratcheting
Even if ratcheting is performed after activating the torque wrench, the angle is
additionally counted, allowing continuous tightening. However, there occurs an
error of less than 1° when activating the torque wrench. An angle error will be
accumulated if ratcheting is repeated many times in one tightening operation.
8

１ ０ ． Error Messages
The M-DW has a self-diagnostic function and displays an error message at
the time of failure. The following lists the error messages and their remedies.
Error
Description
Remedy solution
message
Place the torque wrench standstill in a stable place free
from vibrations. If the error disappears, the torque wrench
is available. If not, the sensor or amp. circuit is defective.
Repair is required. Contact our distributor or
TOHNICHI MFG. CO.,LTD.
Defective sensor
Er0
/amp. circuit
Turn off the power. With the torque wrench deactivated, turn
on the power again. If the error is cleared, the torque wrench is
Limit switch
available. If not, the limit switch is dislocated, or the switch or
Er3
the torque wrench is defective. Review a limit switch position.
left turned on
If the error still persists after reviewing the position, repair is
required. Contact our distributor or TOHNICHI MFG. CO., LTD.
Defective
Er8
Repair is required. Contact our distributor or
TOHNICHI MFG. CO., LTD.
CPU/memory
9

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TEL: + 1-(0)678-423-5777 FAX: + 1-(0)678-423-1333
4046 Hwy. 154 Suite 103 Newnan, GA 30265
Website:http://www.tohnichi-sh.com
13.04.YK