Teac TD-240A User manual

TD-240A
OPERATION MANUAL
TEAC INSTRUMENTS CORPORATION
Rev.1.35
2005.JUL

Introduction
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.

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.
- Placeｓcontaining corrosive gas or flammable gas.
- Where the product may be splashed with water, oil or chemicals.

Safety Precautions
CAUTION
●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.
●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.
- Placeｓwith 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
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
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. FUNCTIONAL DESCRIPTIONS
1-1. Front Panel
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
high limit（indicated value ＞high limit）
Operation of the high limit relay is on.
OK：This LED turns on when the indicated value is smaller than the set value of
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.
STATUS
NUMERICAL
SETTING
DISPLAY
DISPLAY
KEY PAD

1.FUNCTIONAL DESCRIPTIONS
2
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.
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.
Enters the actual load calibration mode.
Select the setting mode number and the blinking digit of the setting
value in setting.
Enters the equivalent input calibration mode.
Inputs the minus sign in setting.
UP
DOWN
FNC
SEL
SHIFT
CAL
FNC
Indicated value display Setting mode“F1”
display

1.FUNCTIONAL DESCRIPTIONS
3
Validates setting items and set values.
Starts the Hold function. To cancel the Hold function,
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.
ENT
HOLD
ZERO
ESC
HOLD
ESC
setting in progress Indicated Value display

1.FUNCTIONAL DESCRIPTIONS
4
1-2. Rear Panel
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.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
N
AC IN
F. G.
SER. No.
MADE IN JAPAN
FRAME GROUND
SIGNAL
AC INPUT
OPTION SLOT
TERMINAL BOARD
TERMINAL BOARD
INPUT/OUTPUT
GUARD GROUND

1.FUNCTIONAL DESCRIPTIONS
5
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・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.






㧿㧱㧾㧚㧺
10
11
12
13
14
15
SER.N
1
11
12
13
14
15
2
3
4
5
6
7
8
9
10
SI/F
N/O
COM
High limit relay
Low limit relay
Hold input
COM
DZ input
Analog voltage output
Analog COM
＋EXC
－SIG
－EXC
＋SIG
SHIELD
N/O
COM
Strain gauge
Connect the shield
cable of the sensor.
sensor input

1.FUNCTIONAL DESCRIPTIONS
6
７・８：Terminals for inputting hold signals
7・・・Hold input
8・・・ COM
８・９：Terminals for inputting digital zero signals. Available in LOCK ON only.
9・・・DZ input
8・・・ COM
10・11：Terminal for output of a voltage proportional to the sensor input.
Output voltage is approx. 2V per 1mV/V(sensor input).
10・・・Voltage output （0 to Approx. ±6V）
11・・・ COM
12 ～15：Terminal for connecting a strain gauge sensor
12・・・＋ EXC
13・・・ －SIG
14・・・－ EXC
15・・・ ＋SIG

2.CONNECTION
7
2. CONNECTION
2-1. Connecting to Cage Clamp Terminal Block
1.Strip the casing 0.2in (6mm) on the cable to be connected.
2.Twist the bare wire to fit the terminal hole.
3.Insert the supplied screwdriver into the upper hole and lift upward.
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.
0.2in
・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.
Request

2.CONNECTION
8
2-2. Connecting Strain Gauge Sensor
・4-wire sensor
・6-wire sensor
（＋ EXC）
（－ EXC）
（＋ SIG）
（－ SIG）
（SHIELD）
＋IN
－OUT
－IN
＋OUT
12
13
14
15
TD-240A
（＋ EXC）
（－ EXC）
（＋ SIG）
（－ SIG）
（SHIELD）
＋IN
－OUT
－IN
＋OUT
12
13
14
15
TD-240A

2.CONNECTION
9
2-3. Connecting Power Input Terminal
AC spec.
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)
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.
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.
Black
White
Green
L
N
AC IN
F.G.
6mm or less
Red
Black
緑
＋
－
DC IN
F.G. 6mm or less
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.

2.CONNECTION
10
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.
Converter
Display
Printer
SI/F
２
１
←Inside Outside →
TD-240A

2.CONNECTION
11
2-5. Connecting High / Low Limit Relays
・Connecting External Load
[ High limit relay ]
N/O
COM
３
４
Load
Varistor Spark Killer
AC
３
４
Spark Killer
DC
←Inside Outside →
←Inside Outside →
COM
N/O
Load
TD-240A
TD-240A
AC Power Supply
DC Power Supply
N/O
COM
５
６
← Inside Outside →
TD-240A
[ Low limit relay ]
Connect a spark killer as
near the load as possible.
Connect a diode as
near the load as possible.
Power Supply
Power Supply
N/O
COM
５
６
← Inside Outside →
TD-240A
[ Low limit relay ]
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.