TD-240A
OPERATION MANUAL
TEAC INSTRUMENTS CORPORATION
Rev.1.35
2005.JUL
Introduction
We appreciate your kind purchase of TD-240A Digital Indicator.
To take full advantage of high performance of TD-240A, Thoroughly read this operating
manual first before use and understand the explanations contained herein for correct
operating procedures.
Introduction
Safety Precautions
Safety Precautions
Be sure to read for safety.
In order to have an TD-240A Digital Indicator used safely, notes I would like you to surely
follow divide into and , and are indicated by the following
documents.Notes indicated here are the serious contents related safely.Please use after
understanding the contents well.
WARNING CAUTION
WARNING
Misuse may cause the risk of death or serious
injury to persons.
CAUTION
Misuse may cause the risk of injury to persons
or damage to property.
Safety Precautions
WARNING
● Use TD-240A with correct supply voltage.
● Do not carry out the direct file of the commercial power supply to a signal input terminal.
● Carefully check wiring, etc. before applying power.
● Set the correct Excitation Voltage for the sensor. （10V is set when TD-240A is
dispatched from us.）
● Do not disassemble the main body for modifications or repair.
● Be sure to ground the protective ground terminal.
● When smoke, a nasty smell, or strange sound, please shut off a power supply
immediately and extract a power supply cable.
● Do not install in the following environments.
- Placeｓ containing corrosive gas or flammable gas.
- Where the product may be splashed with water, oil or chemicals.
Safety Precautions
● Be sure to disconnect the power cable when performing the following.
- Attachment/detachment of connectors of options.
- Wiring/connection of cables to terminal blocks.
- Connection of the ground line.
● Take an interval of more than 5 seconds when repeating ON/OFF.
● For connection to the signal I/O terminal block, wire correctly after checking the signal
names and terminal block numbers.
Also, turn off the power of the main body before connection/wiring to the signal I/O
terminal block.
CAUTION
● Use shielded cables for the connection of strain gauge type sensor, displacement
sensor, External input and output or options.
● Take adequate shielding measures when using at the following locations.
- Near a power line.
- Where a strong electric field or magnetic field is formed.
- Where static electricity, relay noise or the like is generated.
● Do not install in the following environments.
- Where the temperature and/or humidity exceeds the range in the specifications.
- Placeｓ with large quantities of salt or iron powder.
- Where the main body is directly affected by vibration or shock.
● Do not use it, broken down.
● When you send TD-240A by repair etc., please take sufficient measures against a
shock.
CONTENTS
1．FUNCTIONAL DESCRIPTIONS ............................................. 1
1-1．Front Panel ............................................................................................ 1
1-1-1．Status Display .................................................................................. 1
1-1-2．Numerical Display ........................................................................... 2
1-1-3．Setting Key Pad ............................................................................... 2
1-2．Rear Panel ............................................................................................. 4
1-2-1．Guard Ground................................................................................... 4
1-2-2．Frame Ground (Functional ground) ............................................... 4
1-2-3．Options Slot ..................................................................................... 4
1-2-4．AC Power Input Terminal Board .................................................... 4
1-2-5．Signal Input/Output Terminal Board .............................................. 5
CONTENTS
2．CONNECTION ........................................................................7
2-1．Connecting to Cage Clamp Terminal Block ....................................... 7
2-2．Connecting Strain Gauge Sensor ....................................................... 8
2-3．Connecting Power Input Terminal ...................................................... 9
2-4．Connecting SI/F .................................................................................. 10
2-5．Connecting High / Low Limit Relays ................................................. 11
2-6． Connecting Hold and Digital Zero Signals ........................................ 12
2-7．Connecting Voltage Output (VOL OUT) ............................................ 13
3．SETTING MODE CONFIGURATION ....................................14
3-1．Selection of Setting Items .................................................................. 14
3-2．Display of Setting Items ..................................................................... 16
3-3．List of Values ...................................................................................... 17
3-4．Setting Procedure ............................................................................... 19
CONTENTS
4．CALIBRATION ......................................................................20
4-1．Equivalent Input Calibration Procedure ........................................... 21
4-2．Actual Load Calibration ..................................................................... 26
5．SETTING OF FUNCTIONS ...................................................31
5-1．High /Low Limit Value ........................................................................ 31
5-2．High / Low Limit Comparator Mode .................................................. 33
5-3．Hysteresis ............................................................................................ 34
5-4．Digital Offset ....................................................................................... 37
5-5．Near Zero ............................................................................................. 38
5-6．Digital Filter ......................................................................................... 39
5-7．Analog Filter ........................................................................................ 40
5-8．Motion Detect ...................................................................................... 41
5-9．Zero Tracking ...................................................................................... 43
5-10．Hold Mode ......................................................................................... 45
5-11．Automatic Printing ............................................................................ 46
5-12．Hold Value Printing ........................................................................... 48
5-13．LOCK .................................................................................................. 49
5-14．Scale Division ................................................................................... 50
5-15．Display Frequency ............................................................................ 51
5-16．Excitation Voltage ............................................................................. 52
6． HOLD FUNCTION ..................................................................53
6-1．Peak Hold ............................................................................................ 53
6-2．Sample Hold Operation (Digital Hold) ............................................... 56
7．DIGITAL ZERO FUNCTION ..................................................58
CONTENTS
8．BCD DATA OUTPUT（TD-2403） .........................................59
8-1．Connector Pin Assignment ................................................................ 59
8-2．Logic Switching .................................................................................. 60
8-3．Equivalent Circuit ............................................................................... 60
8-4．Signal Timing ...................................................................................... 61
8-5．BCD Data Update Rate Selection ...................................................... 62
9．RS-232C INTERFACE（TD-2404） .......................................64
9-1．Communication Specifications ......................................................... 64
9-1-1．Standard ......................................................................................... 64
9-1-2．Connector Pin Assignment .......................................................... 65
9-1-3．About Cables ................................................................................. 65
9-2．Setting RS-232C Interface ................................................................. 66
9-3．Communication Mode ........................................................................ 67
9-4．Communication Format ..................................................................... 67
10．D/A CONVERTER（TD-2407） ...........................................72
10-1．Obtaining Voltage Output Signal .................................................... 73
10-2．Obtaining Current Output Signal .................................................... 73
10-3．About Resolution .............................................................................. 74
10-4．Setting D/A Zero Full Scale .............................................................. 75
10-5．About D/A Output Error .................................................................... 76
11．DC POWER SOURCE ........................................................77
12．OVERSCALE/ERROR DISPLAYS .....................................78
12-1．Overscale Display ............................................................................. 78
12-2．Calibration Error Display ................................................................. 78
CONTENTS
13．SELF-CHECK FUNCTION AND INITIALIZATION .............79
13-1．Self-Check ......................................................................................... 79
13-2．Initialization ....................................................................................... 81
13-3．TD-240A Block Diagram ................................................................... 83
14．DIMENSIONS ......................................................................84
15．SPECIFICATIONS ..............................................................85
15-1．Analog Section .................................................................................. 85
15-2． Indicator Section ............................................................................... 86
15-3．Setting Section .................................................................................. 86
15-4．External Signals ................................................................................ 86
15-5．Interface .............................................................................................. 86
15-6．Option ................................................................................................ 87
15-7．General Specifications ..................................................................... 87
15-8．Accessories ....................................................................................... 88
16．CONFORMITY TO EC DIRECTIVES ..................................89
1. FUNCTIONAL DESCRIPTIONS
1-1. Front Panel
STATUS
DISPLAY
NUMERICAL
DISPLAY
1.FUNCTIONAL DESCRIPTIONS
SETTING
KEY PAD
1-1-1. Status Display
The TD-240A status is indicated. Setting items are indicated when setting.
HI： This LED turns on when the indicated value is larger than the set value of the
OK： This LED turns on when the indicated value is smaller than the set value of
high limit（indicated value ＞ high limit）
Operation of the high limit relay is on.
the high limit and larger than the set value of the low limit
（low limit ≦ indicated value ≦ high limit）
LOW： This LED turns on when the indicated value is smaller than the set value of
the low limit（indicated value ＜ low limit）
Operation of the low limit relay is on.
PEAK： This LED is blinking when the Peak Hold function is activated.
HOLD： This LED turns on when the indicated value is the held value.
1
1.FUNCTIONAL DESCRIPTIONS
1-1-2. Numerical Display
The three types of display are provided.
1）Indicated value
2）Set value
3）Overflow display
• Minus overflow of the A/D converter （－ LOAD）
• Plus overflow of the A/D converter （LOAD）
• Indicated value overflowed （indicated value ＜－ 19999）（OFL1）
• Indicated value overflowed （indicated value ＞ 19999）（OFL2）
1-1-3. Setting Key Pad
These are keys for commanding settings and operations.
UP
DOWN
FNC
SEL
Increments by one the numeric in the blinking digit of the setting
item selection or set value.
Decrements by one the numeric in the blinking digit of the setting
item selection or set value.
Enters the setting mode. Setting mode“F1” is indicated.
This key sets a decimal point in the span calibration.
Indicated value display
FNC
Setting mode“F1”
display
Enters the actual load calibration mode.
Select the setting mode number and the blinking digit of the setting
value in setting.
SHIFT
Enters the equivalent input calibration mode.
CAL
Inputs the minus sign in setting.
2
ENT
1.FUNCTIONAL DESCRIPTIONS
Validates setting items and set values.
HOLD
ZERO
ESC
Starts the Hold function. To cancel the Hold function,
HOLD
press key again.
Forcibly resets the indicated value to zero （digital zero function）.
When the calibration LOCK is turned off, the digital zero function is
not activated using this key.External DZ input is also disabled.
Cancels setting and returns to the indicated value display.
setting in progress Indicated Value display
ESC
3
1.FUNCTIONAL DESCRIPTIONS
1-2. Rear Panel
SIGNAL
INPUT/OUTPUT
TERMINAL BOARD
GUARD GROUND
MADE IN JAPAN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
AC IN
N
F. G.
SER. No.
AC INPUT
TERMINAL BOARD
OPTION SLOT
FRAME GROUND
1-2-1. GUARD GROUND
This is a guard ground terminal block. Be sure to ground the guard ground terminal to
prevent electric shocks and failures due to static electricity.（The frame and the guard
ground terminal are conducted.）
1-2-2. Frame Ground (Functional ground)
This is a F.G terminal of AC input.（The frame and the F.G terminal are conducted.）
1-2-3. Options Slot
One option board can in stall in the option slot.
・TD-2403 BCD Parallel data output
・TD-2404 RS-232C Interface
・TD-2407 D/A Converter
1-2-4. AC Power Input Terminal Board
Connect AC power code. The input voltage is 100V-240V AC.
The frequency is 50/60Hz.
4
1-2-5. Signal Input/Output Terminal Board
This terminal board is used for input/output of control signals, SI/F data output, and
input of strain gauge sensor signals.
・Terminal board Assignment
1.FUNCTIONAL DESCRIPTIONS
Connect the shield
cable of the sensor.
1
SI/F
2
N/O
3
COM
4
N/O
5
COM
6
7
8
9
10
11
＋ EXC
10
11
12
13
14
15
SER.N
㧿㧱㧾㧚㧺
12
13
14
15
－ SIG
－ EXC
＋ SIG
SHIELD
High limit relay
Low limit relay
Hold input
COM
DZ input
Analog voltage output
Analog COM
Strain gauge
sensor input
1・2 ： Two-wire serial interface （SI/F） for connecting printers and external display
from TEAC.
This interface has no polarity and can connect up to three external devices.
Use parallel two-core cables or captire cables.
3 ～ 6： Output terminals of the high/low limit relays.
3・・・High limit relay （N/O）
4・・・High limit COM
5・・・Low limit relay （N/O）
6・・・Low limit COM
Rating is 250V AC and 0.5A.
5
1.FUNCTIONAL DESCRIPTIONS
７・８： Terminals for inputting hold signals
８・９： Terminals for inputting digital zero signals. Available in LOCK ON only.
10・11： Terminal for output of a voltage proportional to the sensor input.
12 ～ 15：Terminal for connecting a strain gauge sensor
7・・・Hold input
8・・・ COM
9・・・DZ input
8・・・ COM
Output voltage is approx. 2V per 1mV/V(sensor input).
10・・・Voltage output （0 to Approx. ± 6V）
11・・・ COM
12・・・＋ EXC
13・・・ － SIG
14・・・－ EXC
15・・・ ＋ SIG
6
2. CONNECTION
2-1. Connecting to Cage Clamp Terminal Block
1.Strip the casing 0.2in (6mm) on the cable to be connected.
0.2in
2.Twist the bare wire to fit the terminal hole.
3.Insert the supplied screwdriver into the upper hole and lift upward.
2.CONNECTION
4.Insert the twisted wires into the lower hole.
5.Make sure cable is clamped securely and does not come out with a slight tug.
Request
・Cable can be from 24 to 14AWG (0.2 to 2.5mm2)
・ It is not necessary to solder the cable wires or to fix a solderless terminal.
・If several cables to be inserted to the same hole,twist those cable wires
together and insert.
7
2.CONNECTION
2-2. Connecting Strain Gauge Sensor
・4-wire sensor
＋ IN
＋ OUT
－ OUT
12
（＋ EXC）
13
（－ SIG）
・6-wire sensor
＋ OUT
＋ IN
－ IN
－ OUT
（－ EXC）
14
（＋ SIG）
15
（SHIELD）
12
（＋ EXC）
13
（－ SIG）
TD-240A
TD-240A
－ IN
（－ EXC）
14
（＋ SIG）
15
（SHIELD）
8
2-3. Connecting Power Input Terminal
AC spec.
Before connecting cables to the terminal block, put on
climp-style terminals (M3) to the cables as shown in the
figure so that the cables tips might not straggle.
2.CONNECTION
L
AC IN
N
F.G.
6mm or less
Connect AC power code. The input voltage is 100V-240V AC.
The frequency is 50/60Hz.
DC spec. (Depending on the request at the time of order)
＋
DC IN
－
F.G.
6mm or less
Black
White
Green
Red
Black
緑
Connect the positive (+) side of the power source to the red screw side of the terminal
block on the back of the TD-240A, and its negative (-) side to the black screw side.The
input voltage is 12V-24V DC.
CAUTION
Be aware that the voltage drops depending on the wire thickness and length.
Also, never input an AC power source. Doing so will cause a failure.
9
2.CONNECTION
2-4. Connecting SI/F
Two-wire serial interface （SI/F） for connecting printers and external display from
TEAC.
This interface has no polarity and can connect up to three external devices.
Use parallel two-core cables or captire cables.
TD-240A
１
SI/F
２
← Inside Outside →
Printer
Display
Converter
10
2-5. Connecting High / Low Limit Relays
・Connecting External Load
[ High limit relay ]
2.CONNECTION
AC Power Supply
[ Low limit relay ]
TD-240A
N/O
５
６
COM
←
Inside Outside
→
DC Power Supply
[ Low limit relay ]
TD-240A
N/O
５
６
COM
←
Inside Outside
→
TD-240A
N/O
３
４
COM
← Inside Outside →
TD-240A
N/O
３
COM
４
← Inside Outside →
Varistor
Spark Killer
Spark Killer
Load
Load
Connect a spark killer as
near the load as possible.
AC
Power Supply
Connect a diode as
near the load as possible.
DC
Power Supply
CAUTION
Overvoltage and overcurrent may cause breakdown of the relay as well
as shortening its life.
It is recommended to connect a spark killer etc. to the connected load
according to AC/DC (refer to the connection examples). With a noise
killer, you can make the life of the relay longer as well as making it
resistible against noise.
Never short-circuit the load.
Should you do it, the equipment will break down.
11
2.CONNECTION
2-6. Connecting Hold and Digital Zero Signals
・Equivalent circuit （input）
[ Hold input ]
Vcc
[ DZ input ]
Connect 9 and 8.
+12V
TD-240A
←
Inside
Ic=Approx.8mA
COM
Outside →
7
8
Push
switch
IN
ON when IN is ’H
Toggleelay
switch
Relay
Contact
＊
TTL open
collect output
Transistor
IN
Ic=Approx.8mA
9
Push
COM
8
switch
CAUTION
・Avoid applying external voltages to the signal
・Use external elements which withstands Ic=10mA
・Leakage current from external element must be 30μA or below.
12
2-7. Connecting Voltage Output (VOL OUT)
Terminal for out put of a voltage proportional to the sensor input .
Output voltage is approx. 2V per 1mV/V(sensor input).
TD-240A
← Inside Outside →
2.CONNECTION
10
11
SIG
＋
External device
－
GND
Load resistance
2kΩor above
13
3.SETTING MODE CONFIGURATION
3. SETTING MODE CONFIGURATION
3-1. Selection of Setting Items
FNC
Setting Mode 1
DOWN
High Limit
DOWN
UP
Low Limit
High/LowLlimit
Comparison Mode
Hysteresis
UP
（P. 3 1）
（P. 3 1）
（P. 3 3）
（P. 3 4）
Setting Mode 2
SEL SEL
DOWN
UP
Digital Filter
DOWN
Analog Filter
Motion Detect
（time）
Motion Detect
（band）
UP
（P. 3 9）
（P. 4 0）
（P. 4 1）
（P. 4 1）
14
Digital
Offset
Near Zero
（P. 3 7）
（P. 3 8）
Zero Tracking
（time）
Zero Tracking
（band）
Hold Mode
Automatic Printing
Hold Value Printing
（P. 4 3）
（P. 4 3）
（P. 4 5）
（P. 4 6）
（P. 4 8）
3.SETTING MODE CONFIGURATION
Setting Mode3 Setting Mode4
SEL
DOWN
DOWN
Division
Display
Frequency
Excitation
Voltage
LOCK
Scale
UP
（P. 4 9）
UP
（P. 5 0）
（P. 5 1）
（P. 5 2）
DOWN
BCD Data
Update Rate
DOWN
RS-232C
D/A Zero Setting
D/A Full Scale
Setting
UP
（P. 6 2）
UP
（P. 6 6）
（P. 7 5）
（P. 7 5）
15
3.SETTING MODE CONFIGURATION
3-2. Display of Setting Items
・Mode1
・Mode2
(1) High Limit
(2) Low Limit
(3) High/Low Limit Comparison
Mode
(4) Hysteresis
(5) Digital Offset
(6) Near Zero
Blnking OFF
HI
HI
HI
HI
HI
HI
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
(1) Digital Filter
(2) Analog Filter
(3) Motion Detect（time）
(4) Motion Detect（band）
(5) Zero Tracking （time）
(6) Zero Tracking（band）
(7) Hold Mode
(8) Automatic Printing
HI
HI
HI
HI
HI
HI
HI
HI
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
16
(9) Hold value Printing
HI
OK LOW HOLDPEAK
・Mode3
3.SETTING MODE CONFIGURATION
・Mode4
(1) LOCK
(2) Scale Division
(3) Display Frequency
(4) Excitation Voltage
(1) BCD Data Update Rate
(2) RS-232C
(3) D/A Zero Setting
HI
HI
HI
HI
HI
HI
HI
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
OK LOW HOLDPEAK
(4) D/A Full Scale Setting
3-3. List of Values
Setting Mode1
1 High Limit 075.00
2 Low Limit 025.00
3
4 Hysteresis 00.00
5 Digital Offset 000.00
6 Near Zero 001.00
Item Default Set Value
High/Low Limit Comparison Mode
HI
OK LOW HOLDPEAK
LOCK
○
○
0
○
○
○
○
Calibration
LOCK
17
3.SETTING MODE CONFIGURATION
Setting Mode2
Item Default Set Value
1 Digital Filter 0
2 Analog Filter 2
3
Motion Detect（time）
4
Motion Detect（band）
5
Zero Tracking（time）
6
Zero Tracking（band）
7 Hold Mode 0
8 Automatic Printing 1
9 Hold Value Printing 0
Setting Mode3
Item Default Set Value
1.5
05
0.0
00
LOCK
○
○
○
○
○
○
○
○
○
LOCK
Calibration
LOCK
Calibration
LOCK
1LOCK 0000
2 Scale Division 0.01
3 Display Frequency 3
4 Excitation Voltage 1
Setting Mode4
Item Default Set Value
1 BCD Data Update Rate 0
2 RS-232C 13010
3 D/A Zero Setting 000.00
4 D/A Full Scale Setting 100.00
※ default：factory-set value
LOCK
○
○
○
○
○
○
○
Calibration
LOCK
18
3-4. Setting Procedure
FNC
“F1” of setting Mode1
is displayed.
3.SETTING MODE CONFIGURATION
SEL
SEL SEL SEL
“F2” of setting Mode2 “F3” of setting Mode3 “F4” of setting Mode4
is displayed.is displayed.is displayed.
UP
DOWN
Select a
setting item..
UP
DOWN
Select a
setting item..
UP
DOWN
Select a
setting item..
ENT
The most significant digit starts blinking
to prompt setting.
SEL
Select a digit where setting is desired.
UP
DOWN
Set a value.
UP DOWN
Select a
setting item..
If wishing to affix a sign to the high/low limit
and d
igital offset, D/A zero setting full scale
setting, press key.
ENT
Set Value is validated.
ESC
Setting Mode is terminated to return to
SHIFT
CAL
the indicated value display.
If one minute has elapsed after key is pressed without any key hit
FNC
before key is pressed,the setting is canceled and the indicated value is displayed
ENT
again. The set value is not stored in this case.
19
4.CALIBRATION
4. CALIBRATION
"Calibration" refers to an operation whereby matching between the TD-240A and a
strain gauge sensor is obtained. The TD-240A uses the two calibration methods as
described below.
◇ Equivalent Input Calibration
This approach uses no actual loads but key entry of the rated output value of the strain
gauge sensor (mV/V) and the rating value (value to be displayed).
This method is simple and employed when actual loads cannot be applied.
For example
Gain will be automatically decided by registering the values indicated as follows:
for load: 2.001mV/V - 100.0kgf
for pressure: 2.002mV/V - 10.00kgf/cm2, and
for torque: 2.502mV/V - 15.00kgf•m.
TD-240A
Strain gauge sensor
Rated output value （mV/V）
＋
Indicated value
A data sheet will be attached to a strain gauge sensor you buy.
On the data seat, the following values are listed.
Capacity ................................... Load (unit: Kg, t, etc.)
20
Rated Output............................ Voltage (unit: mV/V)
Non-Linearity， Hysterisis，
Input Resistance，Output Resistance，
Zero Balance, etc.
The Capacity and the Rated Output are necessary values for the
equivalent input calibration. Input these two values to TD-240A.
◇ Actual Load Calibration
This approach provides calibration by applying an actual load to the strain gauge sensor
and inputting the actual load value. This calibration is without little errors and more
correct.
4.CALIBRATION
Actual
load
Strain gauge sensor
4-1. Equivalent Input Calibration Procedure
The equivalent input calibration uses the following procedure :
Releasing Calibration LOCK
Setting Scale Division
Release the Calibration LOCK that inhibits calibration.
Set the minimum value of the digital change desired
（omissible if no desired value is present）
TD-240A
Indicated value
Equivalent Input Calibration
Inhibit Calibration
Calibration Lock
Set the rated output vale and zero point of the strain
gauge sensor.
Set the calibration of ON to prevent misoperation.
21
4.CALIBRATION
・Releasing Calibration LOCK
Releasing Calibration LOCK
1)Select setting mode 3.
FNC
SEL SEL
2)Select calibration lock.
DOWN
ENT
SEL
Calibration LOCK
1：ON
0：OFF
UP
DOWN
Use and key to set the calibration lock of
OFF（0）． then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
22
・Setting of Scale Division （Omissible if no change is needed）
Setting of Scale Division
1) Select setting mode 3.
FNC
SEL SEL
2) Set the scale division.
DOWN
ENT
Press twice.
Scale Division（001 to 100）
4.CALIBRATION
UP
DOWN
SEL
Use and keys to set the scale division,
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
23
4.CALIBRATION
・Equivalent Input Calibration
Equivalent Input Calibration
1) Start the equivalent input calibration.
SHIFT
CAL
ENT
Example of a sensor having the output
value of 2.010mV/V for rated 100.00kgf（N）
Rated Output Value（0.500 to 3.000mV/V）
2) Set the rated output value of the sensor.
UP
DOWN
SEL
Use and keys
to set the rated output value,
then use key to validata the setting.
ENT
3) Set the rated value.
UP
DOWN
SEL
Rated Value（00000 to 19999）
Use and keys to set the rated value,
ENT
FNC
then use key to validate the setting. Press key at a blinking
digit to place a decimal point immediately after the digit.
4) Place the sensor without load and set the zero point. Check that the sensor is
unloaded,then press and keys in this order.
ZERO
ENT
If the indicated value following the display CAL2E is
zero, the equivalent input calibration is terminated.
If a calibration error display appears, take a proper action according to the error,
then perform calibration again.
…Span set value is "00000". Set a correct span value.
c
On completion of calibration, turn on the calibration LOCK.
24
・Calibration LOCK
CalibrationLOCK
1) Select setting mode 3.
FNC
2) Select calibration lock.
DOWN
ENT
SEL
4.CALIBRATION
SEL SEL
Calibration LOCK
1：ON
0：OFF
UP
DOWN
3) Use and key to set the calibration lock of
ON（1）． then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
25
4.CALIBRATION
4-2. Actual Load Calibration
The actual load calibration uses the following procedure
Releasing Calibration LOCK
Setting of Scale Division
Zero Calibration
Actual Load Calibration
Calibration LOCK
Release the calibration LOCK that inhibits calibration.
Set the minimum value of the digital change desired.
（omissible if no desired value is present）.
Set the zero point of the strain gauge sensor.
Set the span(gain) point of the strain gage sensor.
Set the calibration of ON to prevent misoperation.
26
・Releasing Calibration LOCK
Releasing Calibration LOCK
1) Select setting mode 3.
FNC
2) Select calibration lock.
DOWN
ENT
SEL
4.CALIBRATION
SEL SEL
Calibration LOCK
1：ON
0：OFF
UP
DOWN
Use and key to set the calibration lock of
OFF（0）． then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
27
4.CALIBRATION
・Setting of Scale Division（omissible if no change is needed）
Setting of Scale Division
1) Select setting mode 3.
FNC
2) Set the scale division.
DOWN
ENT
Press twice.
SEL SEL
Scale Division（001to 100）
Use and keys to set the scale division，
then use key to validate the setting.
To return to the indicated value display, press key.
・Zero Calibration
Zero Calibration
1)Check that the sensor is unloaded, then press keys in
this order.
ENT
DOWN
SEL
ESC
ZERO
and
ENT
UP
28
If the indicated value following the display CAL2E is
zero, the zero calibration is terminated.
・Actual Load Calibration
Actual Load Calibration
1) Apply an actual load to the sensor and set the actual load value.
SEL
4.CALIBRATION
ENT
Indicated Value of
（00000 to 19999）
Actual Load Value
UP
DOWN
SEL
Use and keys to set the actual load value，
then key to validate the setting.
ENT
To move the decimal point, press key at a blinking digit.
FNC
If the indicated value following the display CALSP is
Actual Load, the Actual Load calibration is terminated.
If a calibration error display appears, take a proper action according to the error, then
perform calibration again.
…Span set value is "00000".
Set a correct span value.
…Output of the strain gauge sensor does not reach the span adjustment
range.
Confirm whether an actual load is put on the strain gauge sensor.
Calibration may not be performed without load
…Output of the strain gauge sensor is on the minus side.
Check to see if the +SIG and -SIG wiring if the sensor is reversed.
On completion of calibration, turn on the calibration LOCK.
29
4.CALIBRATION
・Calibration LOCK
Calibration LOCK
1) Select setting mode 3.
FNC
SEL SEL
2) Select calibration lock.
DOWN
ENT
SEL
Calibration LOCK
1：ON
0：OFF
UP
DOWN
3）Use and key to set the calibration lock of
ON（1）． then use key to validate the setting
ENT
To return to the indicated value display, press key.
ESC
30
5. SETTING OF FUNCTIONS
5-1. High /Low Limit Value
High / Low limit value are functions whereby the high output is turned on when the
indicated value exceeds the high / low output is turned on when it drops below the low
limit.
＜ HIGH/LOW output conditions ＞
HIGH ：Indicated value ＞ High limit value
LOW ：Indicated value ＜ Low limit value
5.SETTING OF FUNCTIONS
Indicated value
High limit value
Low limit value
OFF
HIGH
OFF
LOW
Time
ON
ON
31
5.SETTING OF FUNCTIONS
Setting of High/Low Limit Value
1) Select setting mode 1.
2) Select high limit value.
FNC
DOWN
ENT
High Limit Value（00000 to ± 19999）
UP
DOWN
SEL
Use and keys to set the high limit value.
Press key to place a minus sign. press key to validate the
SHIFT
CAL
ENT
setting.
3) Select low limit value.
DOWN
ENT
Low Limit Value（00000 to ± 19999）
UP
DOWN
SEL
Use and key to set the low limit value.
Press key to place a minus sign.
SHIFT
CAL
32
Press key to validate the setting
ENT
To return to the indicated value display, press key.
ESC
5-2. High / Low Limit Comparator Mode
High / Low Limit Comparator Mode
1)Select setting mode 1.
FNC
2)Select high / low limit comparator mode.
DOWN
ENT
Press three times.
5.SETTING OF FUNCTIONS
High / Low Limit
Comparator Mode
3：
Comparison is made at stable
status except for near zero.
2：Comparison is always made
except for near zero
1：Comparison is made in the
stabl status.
0：Comparison is always made.
Use and keys to set the high
UP
ENT
DOWN
/ low Limit Comparator Mode,
then use key to validate the setting.
To return to the indicated value display, press key.
ESC
Except for Mode 0 （Comparison is always made） of the High / Low
Limit Comparator Mode, setting is closely related to Near Zero and
Motion Detect functions. For details, see Near Zero on page 38 and
Motion Detect on page 41 .
33
5.SETTING OF FUNCTIONS
5-3. Hysteresis
The Hysteresis function provides a range of high/low limit comparator off. Usually the
high limit comparator is turned on when the indicated value is above the high limit value
and turned off when below. If you set a hysteresis range, the comparator is turned off
when the indicated value is below the high limit value by the hysteresis setting. This is
effective in preventing chattering caused when signals are slightly varying （vibrating) .
〈Comparison conditions〉
・High limit
ON conditions ：Indicated value ＞ High limit value
OFF conditions：Indicated value ≦（High limit value － Hysteresis set value）
・Low limit
ON conditions ：Indicated value ＜ Low limit value
OFF conditions：Indicated value ≧（Low limit value ＋ Hysteresis set value）
34
・Hysteresis operation
Indicated value
High limit
value
Low limit
value
＋
0
－
High limit relay
HI LED
5.SETTING OF FUNCTIONS
Hysteresis range
Time
Low limit relay
LO LED
OK LED
Relay ON
LED ON
Relay OFF
LED OFF
Relay ON
LED ON
Relay OFF
LED OFF
Relay OFF
LED OFF
Relay ON
LED ON
35
5.SETTING OF FUNCTIONS
Setting of Hysteresis
1) Select setting mode 1.
2)
Select hysteresis.
FNC
DOWN
ENT
Press four times.
Hysteresis （0000 to 9999）
UP
DOWN
SEL
Use and keys to set the hysteresis range，
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
Hysteresis setting is the same for high / low limit.
36
5-4. Digital Offset
This function subtracts a set value from the indicated value. If you make digital offset,
the value which is obtained by subtracting the set value from the indicated value will be
displayed. This is convenient when you cannot obtain zero by unloading the equipment
for some reason or when you want to give offset.
(Indicated value to be displayed) = (Actual indicated value) - (Digital offset setting value)
Setting of Digital Offset
1) Select setting mode 1.
5.SETTING OF FUNCTIONS
FNC
2) Select digital offset.
DOWN
ENT
Press five times.
Digital Offset (00000 to ± 19999)
Input an digital offset setting value with and keys
UP
and validate it with key. Press key to put minus sign.
ENT
SHIFT
To return to the indicated value display, press key.
DOWN
CAL
ESC
SEL
37
5.SETTING OF FUNCTIONS
5-5. Near Zero
The Near Zero function detects that the indicated value is near zero.
Setting of Near Zero
1) Select setting mode 1.
Near Zero ON/OFF is closely related to Automatic Printing and High
and Low Limit Comparator Mode.
For details, see High and Low Limit Comparator Mode on page 33 and
Automatic Printing on page 46 .
FNC
2) Select near zero.
DOWN
ENT
Press six times.
Near Zero
UP
DOWN
SEL
Use and keys to set the near zero.
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
（00000 to 19999）
38
The Near Zero function operates at an absolute value.
5-6. Digital Filter
The Digital Filter function obtains the moving average of Analog-to-Digital（A/D）
converted data and stabilizes the indicated values. The moving average count can be
selected from 4 to 64.
1) Select setting mode 2.
2) Select digital filter.
Setting of Digital Filter
FNC
DOWN
SEL
5.SETTING OF FUNCTIONS
ENT
Digital Filter
5 ： 64 times
4 ： 32 times
3 ： 16 times
UP
DOWN
Use and keys to set the digtal filter,
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
2 ： 8 times
1 ： 4 times
0 ： OFF
39
5.SETTING OF FUNCTIONS
5-7. Analog Filter
This is a lowpass filter filtering the strain gage sensors input signal and cutout the noise
element.
Lowpass filter cutout freguency is selectable in the 4/10/100/3k Hz.
Setting of Analog Filter
1) Select setting mode 2.
2) Select analog filter.
FNC
DOWN
ENT
SEL
Press twice.
Analog Filter
3 ： 3kHz
2 ： 100Hz
1 ： 10Hz
0 ： 4Hz
UP
DOWN
Use and keys to set the analog filter,
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
40
5-8. Motion Detect
Setting of parameters for detecting stable measurement is required.
If the difference between the current indicated value and that of 100msec before fall
within the specified range and the status last for a specified time, indicated values are
assumed stable.
5.SETTING OF FUNCTIONS
Indicated value
Set
range
Time
100mSec
Set period
Whether the indicated value is stable or not is closely related to
Automatic Printing and High and Low Limit Comparator Mode. For
details, see High and Low Limit Comparator Mode on page 33 and
Automatic Printing on page 46
41
5.SETTING OF FUNCTIONS
Setting of Motion Detect
1) Select setting mode 2.
2 ) Select motion detect（time）.
FNC
DOWN
ENT
SEL
Press three times.
Motion Detect(time)
（0.0 to 9.9s）
UP
DOWN
SEL
Use and keys to set the motion detect（time）
then use key to validate the setting.
ENT
3) Select motion detect（range）.
Motion Detect（range）
（00 to 99division）
UP
DOWN
SEL
Use and keys to set the motion detect（range）
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
42
5-9. Zero Tracking
The Zero Tracking function automatically tracks and compensates a fine shift of the zero
point due to a factor such as a drift.
Setting of Zero Tracking
1) Select setting mode 2.
2) Select zero tracking（Time）.
FNC
DOWN
ENT
5.SETTING OF FUNCTIONS
SEL
Press five times.
Zero Tracking（Time）
（0.0 to 9.9S）
UP
DOWN SEL
Use and keys to set the zero tracking （time），
then use key to validate the setting.
ENT
3) Select zero tracking（range）.
DOWN
ENT
Zero Tracking（range）
（00 to 99）
UP
DOWN SEL
Use and keys to set the zero tracking （range），
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
43
5.SETTING OF FUNCTIONS
・The Zero Tracking function automatically resets the zero point to zero at a specified
time interval when the zero point move amount is below the specified range.
・The time（tracking delay）is set in units of 0.1 seconds, from 0.1 to 9.9 seconds. The
range （tracking band）is set in units of quarters of the indicated value. （The indicated
value 02 corresponds to 0.5 scales and 12, 3 scales.） If the time is set to 0.0 sec. and
range to 00, the Zero Tracking function does not work.
Boundary of zero track
＋
0
－
DELAY
BAND=COUNT × the minimum digital scale × 2
Indicated Value
From the point when it returned within the range,
counting will be resumed.
+COUN
T
-COUNT
DELAY
BAND
Request
The Zero Tracking works from where the indicated value is zero. It does not work when
the indicated value exceeds the tracking band. In this case,specify the zero point using
the Digital Zero or Zero Calibration.
44
5-10. Hold Mode
The TD-240A provides the Peak Hold function to hold and display the peak value
（maximum value） of the input signal, and the Sample Hold function to hold and display
an optional point.
1) Select setting mode 2.
2)
Setting of Hold Mode
FNC
Select hold mode.
DOWN
ENT
Press seven times.
5.SETTING OF FUNCTIONS
SEL
Hold Mode
1 ： Peak Hold
0 ： Sample Hold
UP
DOWN
ENT
Use and keys to set the hold mode, then use key
to validate the setting.
To return to the indicated value display, press key.
ESC
45
5.SETTING OF FUNCTIONS
5-11. Automatic Printing
The Automatic Printing function automatically prints out indicated values on a TEAC
printer connected to the TD-240A over the SI/F. Printing is made when indicates vales
are stable. （Parameter for stabilization is set in the Motion Detect function.） The
stabilized indicated value can be held for three seconds （indicated value hold function）.
・Operation of the indicated value hold function
Indicated
value
Hold function …
Indicated value
SI/F
Output signal（HI, LOW）
Near zero
Stabl e
Near zero
0
ON
OFF
ON
OFF
ON
↑
Automatic printing
OFF
ON
※ 3 seconds
Hold
Time
ON
46
※ If the state of Near Zero ON is not keeping for three
minutes, the hold values was not canceled.
5.SETTING OF FUNCTIONS
Near zero
Indicated
value
Stabl e
Near zero
0
ON
OFF
ON
OFF
Time
ON
OFF
ON
ON
3 seconds
↑
Hold
Automatic printing
Setting of Automatic Printing
1) Select setting mode 2.
FNC
SEL
2) Select automatic printing.
DOWN
ENT
Press eight times.
Automatic printing
2 ： Automatic printing ON,
Indicated value HOLD
1 ： Automatic printing ON
0 ： Automatic printing OFF
UP
DOWN
Use and keys to set the automatic printing，
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
47
5.SETTING OF FUNCTIONS
5-12. Hold Value Printing
The Hold Value Printing function automatically prints out the peak value （held value）
on a TEAC printer connected to the TD-240A over the SI/F.
Setting of Hold Value Printing
1) Select setting mode 2.
FNC
2) Select hold value printing.
DOWN
ENT
SEL
Press nine times.
Hold Value Printing
1 ： Hold value printed when Hold
is canceled
0 ： No printing
UP
DOWN
Use and keys to set the hold value printing.
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
If setting Hold Value Printing when the hold value canceled,
Automatic Printing did not work.
48
5-13. LOCK
5.SETTING OF FUNCTIONS
The Setting value LOCK function inhibits changes to setting to prevent changes to set
values or calibrated values through misoperation.
Setting of LOCK
1) Select setting mode 3.
FNC
SEL SEL
2) Select lock.
DOWN
ENT
Select
Setting Value LOCK
1 ： LOCK
0 ： LOCK
released
Calbration LOCK
1 ： LOCK
0 ： LOCK
released
Hold key
operation
1 ：Invalid
0 ：Va l i d
Zero key operation
1 ：Invalid
0 ：Valid
UP
DOWN
SEL
Use and key to set the lock，
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
For setting items locked by using set value LOCK and calibration
value LOCK , see the set value list on page 17.
The Digital Zero function by using the key on the front
ZERO
panel is not effective when the Setting value LOCK （calibrated
value）is released（nor is it effective from the rear panel DZ）.
On completion of calibration set the calibration value LOCK.
49
5.SETTING OF FUNCTIONS
5-14. Scale Division
This function sets the minimum value of the digital change.
Setting of Scale Division
1) Select setting mode 3.
2) Select scale division.
FNC
DOWN
ENT
SEL SEL
Press twice.
Scale Division
（001 to 100）
UP
DOWN
SEL
Use and key to set the scale division,
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
50
5-15. Display Frequency
The Display frequency function is used to select the times the indicated values are
displayed per second. A/D conversion count is fixed to 100 per second.
Setting of Display Count
1) Select setting mode 3.
FNC
2) Select display frequency.
DOWN
ENT
5.SETTING OF FUNCTIONS
SEL SEL
Press three times.
Display Frequency
3 ： 25/sec.
2 ： 13/sec.
1 ： 6/sec.
0 ： 3/sec.
UP
DOWN
Use and keys to set the display frequency,
then use key to validate the setting.
ENT
To return to the indicated value display, press key.
ESC
51
5.SETTING OF FUNCTIONS
5-16. Excitation Voltage
This function selects the bridge excitation voltage to be supplied to the strain gauge
sensor.
Setting Excitation Voltage
1) Select setting mode 3.
2) Select excitation voltage.
FNC
DOWN
ENT
SEL SEL
Press four times.
Excitation Voltage
1 ： 10 V
0 ： 2.5V
Set excitation voltage with and keys and validate it
with key.
ENT
To return to the indicated value display, press key.
UP DO WN
ESC
CAUTION
Use a strain gauge sensor to be connected to the TD-240A whose
52
maximum excitation voltage is above the bridge excitation voltage
specified.
If the bridge excitation voltage is greater than the maximum excitation
voltage of the sensor, the sensor may overheat or may be damaged.
6 HOLD FUNCTION
6-1. Peak Hold
・Peak Hold Operation
6HOLD FUNCTION
Indicated value
Sensor input value
HOLD
Key input
HOLD LED
Peak hold section Peak hold release
Time
LED lighting
Peak hold start Peak hold reset
53
6HOLD FUNCTION
Indicated value
Sensor input value
Peak hold section Peak hold release
Hold input
HOLD LED
Time
LED lighting
Peak hold start Peak hold reset
54
・Timing Chart
6HOLD FUNCTION
Indicated value
Sensor input
Hold
input
Display and
BCD output
t1 ： Time from the short-circuiting of the hold input (OFF → ON) to the display of the
peak hold value.
t3
Time
t1
t2
t4
t1 ： MAX 25mS
t2 ： MAX 10mS
t3 ： MAX 25mS
t4 ： MIN 25mS
t2 ： Time until the A/D conversion of the analog value.
t3 ： Time from the input of the hold input (ON → OFF) to the reset of the analog peak
hold value.
t4 ： The minimum tracking (resetting) time required for resetting the display of the
held value.
55
6HOLD FUNCTION
6-2. Sample Hold Operation (Digital Hold)
・Sample Hold Operation
Indicated value
Sensor input value
Time
HOLD
Key input
HOLD LED
Hold input
Hold section
LED lighting
Indicated value
Sensor input value
Time
Hold section
56
HOLD LED
LED lighting
・Timing Chart
6HOLD FUNCTION
Indicated value
Sensor input
t3
Hold input
t4
t1
Display and
BCD output
t2
t1 ： MAX 25mS
t2 ： MAX 25mS
t3 ： MAX 25mS
t4 ： MIN 25mS
t1 ： Time from the short-circuiting of the hold input (OFF → ON) to the display of the
hold value.
Time
t2 ： Time from start of the hold to the A/D conversion of the hold value.
t3 ： Time from the input of the hold input (ON → OFF) to the reset of the analog hold.
t4 ： The minimum tracking (resetting) time required for resetting the display of the
held value.
57
7.DIGITAL ZERO FUNCTION
7. DIGITAL ZERO FUNCTION
This function makes the indicated value zero instantly by a key operation.
Setting of Digital Zero
1) Perform digital zero.
ZERO
2) When the indicated value becomes zero, digital zero is completed.
Digital zero will not work when the calibration value LOCK is
turned off.
It only works when the calibration value LOCK is turned on.
If you turn off the power, digital zero will be reset.
58
8. BCD DATA OUTPUT（TD-2403）
The BCD Data Output Interface is for transferring indication values in BCD (Binary
coded Decimal) from to PC's PLC's or sequences for controlling, processing and
recording data.
The internal and external circuits are opto-isolated.
8-1. Connector Pin Assignment
Amphenol Connector （36-Pin）
No. Signal No. Signal
8.BCD DATA OUTPUT（TD-2403）
1
＊
2Out 1 20
3Out 2 21
4 Out 4 22 Out Near Zero
5 Out 8 23 Out
6 Out 10 24 Out OVER
7 Out 20 25 Out
8 Out 40 26 Out STROBE
9 Out 80 27 In BCD Data hold
10 Out 100 28 In Logic Switching
11 Out 200 29
12 Out 400 30
13 Out 800 31
14 Out 1000 32
15 Out 2000 33
COM 19
＊
Minus（polarity）
P. C （stable）
COM
16 Out 4000 34
17 Out 8000 35
18 Out 10000 36
Compatible connector is DDK57-30360 or equivalent.
59
8.BCD DATA OUTPUT（TD-2403）
8-2. Logic Switching
The logic Switching function is used to switch between the signal output logics, positive
logic and negative logic. Pin 28 is used for this purpose.
When COM and pin 28 are left open, the negative logic is used. When COM and pin 28
are short-circuited, the positive logic is used.
8-3. Equivalent Circuit
・Output
The signal output circuit employs the TTL open collector output
Vcc
+5V
Vceo=30V(max)
Ic =50mA (max)
● Internal transistor status
Output data Negative Positive
0OFFON
1ONOFF
TD-240A
Inside
COM
outside
Vext
● Output pin level
Output data Negative Positive
0
1
Through logic switching （pin 28）
ＨＬ
ＬＨ
60
・Input
8.BCD DATA OUTPUT（TD-2403）
Vcc
+5V
・Avoid applying external voltages to the signal input circuit.
・Avoid applying external voltages to the signal input circuit.
・Use external elements which withstands Ic=10mA or above
・Use external elements which withstands Ic=10mA or above
・Leakage current from external element must be 30μA or below.
・Leakage current from external element must be 30μA or below.
TD-240A
Outside
Inside
Ic=Approx. 6mA
COM
注 意
注 意
Switch
Open OFF
Short ON
Transistor
TTL open collector output
＊
8-4. Signal Timing
・P. C
P.C goes on with the BCD data when measurement is stable. Perform data read
approximately 25msec. after the trailing edge of the P.C
BCD data
P. C
・OVER
0
1
Output when LOAD or -LOAD, and OFL1 or OFL2 are specified.
25msec. or more
61
8.BCD DATA OUTPUT（TD-2403）
・STROBE
BCD data is updated on a per A/D conversion and the strobe pulse synchronous with the
BCD data is output.Use the rising edge of the pulse to read data
BCD data
OVER
0
STROBE
1
strobe range
8-5. BCD Data Update Rate Selection
BCD Data Update Rate Selection
1) Select setting mode 4.
FNC
2) Set the update rate of BCD parallel data output.
DOWN
ENT
SEL
BCD Update Rate
62
0 ： 100 times/sec. STROBE Range 5msec
1 ： 50 times/sec. 〃 10msec
2
：
20 times/sec. 〃 25msec
3 ： 10 times/sec. 〃 50msec
4 ： 5 times/sec. 〃 100msec
5 ： 2 times/sec. 〃 250msec
6 ： 1 times/sec. 〃 Approx. 500msec
8.BCD DATA OUTPUT（TD-2403）
Normaly，BCD data update synchronous the A/D conversion (100
times/sec).
When the BCD input equipment is low ability and can not read out
the high rate of 100 times/sec.，set the BCD data update rate is low.
63
9.RS-232C INTERFACE（TD-2404）
9. RS-232C INTERFACE（TD-2404）
RS-232C interface is used to read out the indicated value and the state of TD-240A and
to write set values into TD-240A. It is convenient to connect TD-240A with a computer,
a process controller and a sequencer, etc. to make processing such as control,
aggregation, recording and so on.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
MADE IN JAPAN
L
AC IN
N
F. G.
SER. No.
9-1. Communication Specifications
9-1-1. Standard
Signal level ：Based on RS-232C
Transmitting distance ：Approx.15m
Transmitting method ：Asynchronous，Full duplex
Transmitting speed ：1200，2400，4800，or 9600bps selectable
Bit configuration ：Start bit 1
Character length 7 or 8 bit selectable
Stop bit 1or 2 bit Selectable
Parity none,odd or even selectable
Code ：ASCII
64
9-1-2. Connector Pin Assignment
Adaptable plug :25-pin D-sub connector
9.RS-232C INTERFACE（TD-2404）
1
2out TxD 15
3in RxD 16
4out RTS 17
5in CTS 18
619
7
821
922
10 23
11 24
12 25
13
9-1-3. About Cables
2
3
4
5
8
6
20
7
＊
＊
TD-240A
1
FG
TｘD
RｘD
RTS
CTS
(CD)
(DSR)
DTR
SG
FG 14
SG 20 out DTR
cross cable
1
2
3
4
5
8
6
20
7
PC etc…
FG
TｘD
RｘD
RTS
CTS
CD
DSR
DTR
SG
※ The avobe diagram is for connecting a personal computer as a DTE(Data Terminal
Equipment)device.
If it is a DCE (Data Circuit-terminating Equipment)device,connect pin to pin (DTR
to DTR, DSR to DSR etc.)
※ Cables should be prepared after checking connector type and pin assignments of the
connected device.
65
9.RS-232C INTERFACE（TD-2404）
9-2. Setting RS-232C Interface
This will set the RS-232C communication conditions of TD-240A.
Setting of RS-232C
1) Select setting mode 4.
FNC
2) Select RS-232C.
DOWN
ENT
Press twice.
SEL
Press three times.
Communication
Mode
2 ： Communication Mode 2
(transmits when printed)
1 ： Communication Mode 1
(transmits continuously)
0 ： Communication Mode 0
(performs communication
by a command)
Baud Rate
3 ： 9600bps
2 ： 4800bps
1 ： 2400bps
0 ： 1200bps
Stop Bit
1 ： 2bit
0 ： 1bit
Parity Bit
2 ： Even number
1 ： Odd number
0 ： None
Character Length
1 ： 8bit
0 ： 7bit
66
UP
DOWN
SEL
3) Input RS-232C with and keys and validate
it with key.
ENT
To return to the indicated value display, press key.
ESC
9-3. Communication Mode
1. Communication Mode 0
This mode performs communication by a command from the host computer.
In this mode, you can read out the indicated value, status, set values and write in set
values.
2. Communication Mode 1
This mode continuously transmits the indicated values and the status.
3. Communication Mode 2
This mode transmits the indicated values when they are printed.
9.RS-232C INTERFACE（TD-2404）
9-4. Communication Format
1. Communication Mode 0
・Reading Out the Indicated Value (the sign, indicated value with 5 digits and decimal point)
Host
TD-240A
・Reading Out the Status (seven digits)
Host
TD-240A
R A CR
RD CR
1:ON
Hold
0:OFF
RA CRLF
RD CRLF0 0 0 0 0 0 0
1 0 0 0 0 .
＋
※ Undefined
1:ON
Stable
0:OFF
Near zero output signal 1:ON
HI output signal 0:OFF
HI 1:ON
LO output signal 0:OFF
L O 1:ON
output signal 0:OFF
OK 1:ON
output signal 0:OFF
67
9.RS-232C INTERFACE（TD-2404）
・Write in of the set value
High Limit
Low Limit
High/Low Limit
Comparison Mode
Hysteresis
Digital Offset
Near Zero
Digital Filter
Analog Filter
W
W
W
W
W
W
W
W
0
0
0
0 0 0 0 0
0 0 0 0 0
CR
CR LF2 0
CR LF0 0 0 0 3 0 0
CR LF0 4 0
CR LF 5 0
CR LF 6 0
CR LF 1 1
CR LF 2 1
（Set value
LF1
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
MD（stable time）
MD（stable band）
Zero Tracking（time）
Zero Tracking（band）
Hold Mode
Automatic Printing
Hold Value Printing
W
W
W
W
W
W
W
Set value No.
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
Max 5digits
0
0
0
CR LF 3 1
CR LF 4 1
CR LF 5 1
CR LF 6 1
CR LF 7 1
CR LF 8 1
CR LF 9 1
Sign bit
0 ：In signed setting, this will be recognized
as plus.
－：This will be recognized as minus.
※
Do not put other than zero into a place which is set zero.
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
（Set value
LOCK）
68
9.RS-232C INTERFACE（TD-2404）
LOCK
Scale Division
Display Frequency
Excitation Voltage
BCD Data Update Rate
RS-232C
D/A Zero Setting
D/A Full Scale Setting
2
W
W
W
W
W
W
W
W
Set value No.
0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0
Max 5digits
CR
CR LF2 2
CR LF0 0 0 0 3 0 2
CR LF 4 2
CR LF 1 3
CR LF 2 3
CR LF 3 3
CR LF 4 3
LF1
（calibration
LOCK）
calibration
（
LOCK）
calibration
（
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
calibration
（
calibration
（
LOCK）
LOCK）
・Reading out Set Values
Host
TD-240A
Ｗ
Set value No.
Sign bit
（
（
calibration
calibration
LOCK）
LOCK）
※ Do not put other than zero into a place which is set zero.
0 ：In signed setting, this will be recognized
as plus.
－：This will be recognized as minus.
It is impossible to write Ｗ２４ and Ｗ３４.
CR
Ｗ
CR LF
Set value No. The same format as write-in
of set values.
69
9.RS-232C INTERFACE（TD-2404）
・Command (host → TD-240A)
Hold
Hold Reset
Digital Zero
Digital Zero Reset
Print Instruction
2. Communication Mode 1
This mode will continuously transmit the indicated values.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Ｃ
Ｃ
Ｃ
Ｃ
Ｃ
Ｅ
Ｆ
Ｇ
Ｈ
Ｉ
CR
CR
(This is effective only when the calibration
CR
value LOCK is "1.")
(This is effective only when the calibration
CR
value LOCK is "1.")
(This will issue print a command
CR
onto SIF.)
G S ， 1 ， 2 ， 3 ， 4 ， ±
HEADER
3. Communication Mode 2
This mode will transmit when the indicated value is printed.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
G S ， 1 ， 2 ， 3 ， 4 ， ±
HEADER
****
****
Sign
＋ or －
Sign
＋ or －
CR LF
Five digits of the indicated
value and decimal point
CR LF
Five digits of the indicated
value and decimal point
70
＊ 1
O........ Over Load（LOAD，OFL）
S ........ Stable
M....... Not Stable
H........ Hold
＊ 1 Priority H ＞ O ＞（Ｓ or Ｍ）
＊ 2
A........Zero Tracking OFF
T ........Zero Tracking ON
9.RS-232C INTERFACE（TD-2404）
＊ 3
H........High Limit ON
L ........Low Limit ON
G........High / Low Limit OFF
N........High / Low Limit ON
F ........Compare OFF
＊ 3 Priority N ＞（H or L ） F ＞ G
＊ 4
N........Zero Near OFF
Z ........Zero Near ON
71
10.D/A CONVERTER（TD-2407）
10. D/A CONVERTER（TD-2407）
This is a converter to obtain an analog output which is linked with the indicated values of
TD-240A.
The range of the analog output is from 0 to +10V for the voltage output or from 4 to
20mA for the constant current output.
For any digital value you have set with the D/A zero setting and the D/A full scale setting
functions, you can obtain from zero (0V, 4mA) to full scale (+10V, 20mA) of analog
output.
The output circuit and the main circuit are isolated. The resolution is 1/3000 for the
voltage from 0 to +10V and the conversion rate is 100 times per a second. The output
has an overrange of about ± 10%FS.
MADE IN JAPAN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
AC IN
N
F. G.
SER. No.
V OUT
OUT
I
These are terminals to obtain
voltage or current signal of the
voltage/current output terminal.
+ is for signal and - for ground.
You can obtain voltage from 0
to +10V or current from 4 to
20mA.
72
10-1. Obtaining Voltage Output Signal
Use + and - terminals of TD-240A connecting to them an external equipment (with load
resistance of 2KΩ or more).
TD-240A
← Inside Outside →
10.D/A CONVERTER（TD-2407）
＋
SIG
－
10-2. Obtaining Current Output Signal
Use + and - terminals of TD-240A connecting to them an external equipment (with load
resistance of 350Ω or less).
TD-240A
← Inside Outside →
＋
SIG
－
＋
External equipment
－
GND
＋
－
GND
Load resistance: 2KΩ or more
External equipment
Load resistance: 350Ω or less
73
10.D/A CONVERTER（TD-2407）
10-3. About Resolution
The D/A converter has the resolution of 1/3000 for 0 to 10V (4 to 20mA).
・The D/A converter is an option.
・Do not apply voltage externally. If you do, it will break down.
・Do not short-circuit the voltage output. Short-circuiting may
cause failure. Connecting a capacity load might cause oscillation.
CAUTION
74
10-4. Setting D/A Zero Full Scale
This will set the D/A zero full scale of TD-240A.
Setting D/A Zero Full Scale
1)Select setting mode 4.
FNC
2)Set D/A zero.
DOWN
ENT
Press three times.
SEL
Press three times.
10.D/A CONVERTER（TD-2407）
D/A Zero Value (00000 to ± 19999)
UP
DOWN
SEL
Set D/A zero with and keys. Press
SHIFT
key to put minus sign. When you have made setting, validate it
CAL
ENT
with key.
3）Set D/A full scale.
DOWN
ENT
Press one times.
UP
DOWN
SEL
Set D/A full scale with and keys. Press
SHIFT
key to put minus sign. When you have made setting, validate it
CAL
ENT
with key.
75
10.D/A CONVERTER（TD-2407）
10-5. About D/A Output Error
This is an error which is output only when D/A option is provided.
D/A output is less than the range of output.
For current output: 4mA - 25% or less (about 0mA or less)
For voltage output: 0V - 25% or less (about -2.5V or less)
The D/A output exceeds the range of the output.
For current output: 20mA + 25% or more (about 24mA or more)
For voltage output: 10V + 25% or more (about 12.5V or more)
76
11. DC POWER SOURCE
By specifying at the time of shipment, TD-240A can be used with DC power supply.
Red
Black
MADE IN JAPAN
11.DC POWER SOURCE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
＋
ＤＣＩＮ
DC IN
－
F. G.
SER. No.
Connect the positive (+) side of the power source to the red screw side of the terminal
block on the back of the TD-240A, and its negative (-) side to the black screw side.
Input voltage range ( voltage between terminals of the F340A)
DC12 ～ 24V（± 15%）
CAUTION
Be aware that the voltage drops depending on the wire thickness and length.
Also, never input an AC power source. Doing so will cause a failure.
Power consumption
15W max
Request
Use a source power (or battery) of 3A DC or more.
77
12.OVERSCALE/ERROR DISPLAYS
12. OVERSCALE/ERROR DISPLAYS
12-1. Overscale Display
Minus overflow of the A/D converter （under -3.2mV/V between ± SIG）
Plus overflow of the A/D converter （over 3.2mV/V between ± SIG）
Indicated value overflowed （indicated value<-1999）
Indicated value overflowed （indicated value>1999）
12-2. Calibration Error Display
Span set value is "00000"
Output of the strain gauge sensor does not reach the span
adjustment range.
Output of the strain gauge sensor is on the minus（negative）side.
78
13.SELF-CHECK FUNCTION AND INITIALIZATION
13. SELF-CHECK FUNCTION AND INITIALIZATION
13-1. Self-Check
The TD-240A incorporates the Self-check Function to detect errors in the internal
circuits and in programs and the Visual-check Function to visually check the indicator.
Setting Method
1）Turn off the power to the TD-240A.
2）Turn on the power with key held down.
The self-check is completed in 30 seconds. The display " " should appear, then
the indicate value should follow.This ensures that the TD-240A is in normal operation.
ESC
79
13.SELF-CHECK FUNCTION AND INITIALIZATION
Self-check （Visual-Check Sequence）
80
13-2. Initialization
The Initialization is an operation to reset the memory to the factory setting. This
operation resets all set values except calibrated values （obtained through zero calibration
and span calibration） to the factory setting
Setting Method
13.SELF-CHECK FUNCTION AND INITIALIZATION
1）Turn off the power to the TD-240A.
2）Turn on the power with and keys held down．
The initialization follows the self-check.
ESC
ENT
81
13.SELF-CHECK FUNCTION AND INITIALIZATION
Initialization Sequence
82
13-3. TD-240A Block Diagram
1024bit
NOV.RAM
13.SELF-CHECK FUNCTION AND INITIALIZATION
HOLD
DZ
HI
LO
SIF
CPU
BCD
128K
Dog
Watc h
MPU
16bit
VOL OUT
Flash
GND
ROM
Serial
RAM
4Kbyte
Port
Port
Port
Serial
Port
Port
Display
RS-232C
LED
D/A
2Line
Parallel
Input
Output
Parallel
SI/F
2Line
Key Input
AC IN
Buffer
A/D
Conversion
L
F.G
N
FRAME
+5V
Isolation
Low-pass
Fillter
× 100
＋ SIG
－ SIG
Voltage
Excitation
Voltage
Referrence
VCC
Power Supply Unit
FRAME
＋ EXC
－ EXC
F.G
SI/F 用
+12V +12V -12V +5V
83
14.DIMENSIONS
14. DIMENSIONS
9691
2.52.5
H I OK LOW PEAK HOLD
DIGITAL
INDICATOR
F340A
UP
FNC
SHIFT
CAL
（Front）（Side）
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
MADE IN JAPAN
TD-240A
DOWN
SEL
GAIN
ENT
96
L
AC IN
N
F.G.
SER. No.
DIGITAL
TRANSDUCER INDICATOR
HOLD
ZERO
ESC
OPTION
OPTION
BCO
BCO
232
232
DAC
DAC
10
2.5V
B.V
10
V
DIGITAL
INDICATOR
2.5V
100 - 240V ~
50 - 60Hz
15W
MADE IN JAPAN
B.V
V
F340A
F.G
1
1
SI/F
SI/F
2
2
3
3
HI
HI
4
4
5
5
LO
LO
6
6
7
7
HOLD
HOLD
8
8
DZ
DZ
9
9
10
10
VOL OUT
VOL OUT
G
G
11
11
+EXC
+EXC
12
12
-SIG
-SIG
13
13
-EXC
-EXC
14
14
+SIG
+SIG
15
15
F.G
12213
5
R
-
4
- 0
- 0
+1
92
92
92
Panel cut out dimensions
下
以
3
R
-
4
2.5 2.5
91
（Rear）
84
+1
92
- 0
Unit：mm
15. SPECIFICATIONS
15-1. Analog Section
Bride Voltage DC 10V ± 10％
Signal input range － 3.0 to 3.0mV/V
Equivalent input calibration range 0.5 ～ 3.0mV/V
Equivalent input calibration error ＜ 0.1％FS（0.5mV/V input）
15.SPECIFICATIONS
DC 2.5V ± 10％
Output current of ｍax 30mA
Changable by setting key Pad
Actual load calibration range 0.5 ～ 3.0mV/V
Zero adjustment range 0 ～± 2.0mV/V
Analog input signal sensitivity 1μV/count
Accuracy Non-linearity：＜ 0.02%FS（of 3mV/V input）
Zero drift ：＜ 0.5μV/ ℃
Gain drift ：＜ 25ppm/ ℃
A/D converter 100 times /sec. Resolution：16 bits （binary）
Analog filter 4Hz，10Hz，100Hz（Initial），3ｋHz
Changable by setting key pad
Peak hold function （high-speed analog hold system）
Operation response speed：Approx. 1kHz
（Sin wave : 3mV/V input，
Analog Filter.3kHz）
Accuracy： ＜ 0.1%FS
Reset time：＜ 50μS
85
15.SPECIFICATIONS
15-2. Indicator Section
Indicator Numeric display （5 digits）, 15mm in height, red LED
Items Status HI，OK，LOW，PEAK，HOLD
15-3. Setting Section
Numeric 5digits ±
Indicatid value － 19999 to 19999
Decimal point Selectable
Red LED 5
Count 3，6，13，25times/sec. Selectable
Items Calibration：Zero/Span calibration （actual load calibration,
setting，D/A converter fullscael setting.
15-4. External Signals
equivalent input calibration）
High limit value，Low limit value，High/Low limit comparison mode，
Hysteresis, Digital offset, Near zero，Digital filter, Analogfilter，
Motion detect, Zero tracking, Hold mode，Automatic printing，
Hold value printing，LOCK，Scale division，Display frequency,
Excitation Voltage，BCD data update rate，RS-232C，D/A converter
High limit relay，Low limit relay，Analog voltage output，
Hold signal input, Digital zero signal input.
15-5. Interface
86
SI/F output
15-6. Option
・TD-2403 BCD Parallel data output
・TD-2404 RS-232C Interface
・TD-2407 D/A Converter
15-7. General Specifications
Power voltage - AC spec: 100V to 240V AC ( ＋ 10% － 15%)
15.SPECIFICATIONS
[Free power supply 50Hz/60Hz]
- DC spec: 12V to 24V DC ( ± 15%)
(Depending on the request at the time of order)
Power consumption - AC spec: 15W max.
- DC spec: 15W max.
Rush current (Typ) 20A, 2.5 msec.: 100V AC mean load state
(ordinary temperature, at cold-start time)
40A, 2.5 msec.: 200V AC mean load state
(ordinary temperature, at cold-start time)
Ambient conditions Temperature：Operation － 10 to ＋ 40 ℃
Storage － 40 to ＋ 80 ℃
Humidity：＜ 85％RH（non-condensation）
Dimensions 96W × 96H × 135D（mm）（excluding protrusions）
Panelcutout dimension 92 × 92 （mm）
＋ 1
－ 0
Weight Approx.0.9kg
87
15.SPECIFICATIONS
15-8. Accessories
・AC power cord. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
・Mini screwdriver for terminal board connection . . 1
・Ferrite core. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
・3P － 2P conversion adapter . . . . . . . . . . . . . . . . . 1
・BCD Output connector . . . . . . . . . . . . . . . . . . . . . 1（when BCD option is supplied）
・TD-240A operational manual
88
16.CONFORMITY TO EC DIRECTIVES
16. CONFORMITY TO EC DIRECTIVES
The TD-240A digital indicator conforms to EC directives (based on the EC council of
ministers), carrying a CE mark.
- Low voltage directive: EN61010-1
- EMC directive: EN61326-1
EN55011，EN61000-4-2，EN61000-4-3，EN61000-4-4
EN61000-4-5，EN61000-4-6，EN61000-4-8
EN61000-4-11，EN61000-3-2，EN61000-3-3
When installing, attention should be given to the following.
1. Since the TD-240A is defined as an open type (built-in equipment), be sure to install
the TD-240A and fix to a panel or the like for use.
2. Use the attached power cable.
3. Use shielded cables for others (load cell, external I/O, option).
Attachment of a ferrite core
It is necessary to twist a power supply cable and sensor cables, such as a load cell,
around an attached ferrite core.（Common to AC spec. and DC spec.）
A cable is twisted around
a ferrite core.（One roll）
power supply cable
Ferrite core
TD-240A
Load cell
89
16.CONFORMITY TO EC DIRECTIVES
Connection of Lightning serge protect
The F340A main body conforms to EMC directive EN61000-4-5 (lightning surge
immunity) in combination with the lightning surge protect.
● AC Spec.
TD-240A
Lightning surge protect
MAINTRAB MNT-1D
● DC Spec.
Lightning surge protect
The cable of the EU outlet shape is required for connection
of lighting serge protect. (Option)
＊ MAINTRAB MNT-1Dis a trademark of PHOENIX
CONTACT.
TD-240A
PT 2-PE/S-24AC-ST
90
PT-BE/FM
（DIN rail attachment type）
＊ PT-BE /FM 、PT 2-PE/S-24AC-ST is a trademark of
PHOENIX CONTACT.
This lightning surge protect is not a standard accessory (optionally available).
Purchase it from PHOENIX CONTACT or us.
TEAC INSTRUMENTS CORPORATION
83 IMAIKAMIMACHI, NAKAHARA-KU, KAWASAKI JAPAN
Phone：(044)-711-5221 Fax： (044)-711-5240
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