Teac TD-240A Operation Manual
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
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