ＴＤ－２５０Ｔ
Digital Indicator
Instruction Manual

TEAC Corporation
T001303-00JiIntroduction
Thank you for purchasing a TD-250T Digital Indicator.
Be sure to read the following instructions in order to safely operate the TD-250T according to
specifications.

For Your Safety
This manual describes the safety instruction for the operation of TD-250T digital indicator. Readthis manual carefully and understand the contents before using the product.

Warning
Follow the instructions below, or you may be exposed to an immediate danger of major injury
or death.
・ Never use it exceeding the rated specifications as there is a danger of injury, fire orelectrical shock.
・ Never use it in a flammable gaseous environment as there is a danger of explosion.
・Locations with corrosive and flammable gas
・Location with water, oil or chemical splash
・ If it malfunctions (any smoke, odor or noise is present), stop operating the productimmediately and unplug the power cable as there is a danger of fire or electrical shock.
・ Never attempt to disassemble the product.
・ Carefully check connections and wiring before applying power.
・ Be sure to ground the protective ground terminal.

CautionFollow the instructions below, or you may be exposed to personal injury or mechanical damage.
・ Disconnect the power cable when performing the following.
・Attaching / detaching the optional connectors.
・Wiring / connecting a cable to terminal blocks.
・Connecting the ground line.
・ Wait more than 5 seconds when recycling the power.
・ Allow 5 minutes or more warm-up time after power on.
・ When making a connection to the signal I/O connectors, check the signal name and the pin
assignment to prevent a false connection. Also the power must be turned off when making
connection.
・ Use a shielded cable when connecting to load-cell, external I/O and options.
・ Take adequate measures when operating in the following locations.
・Near a power line
・Where a strong electric or magnetic field is present
・Where static electricity or noise such as from relay is generated
・ Do not install under the following environment.
・Locations exceeding the temperature or humidity specification
・Locations in high salinity or iron・Location under direct vibration or shock.
・ Do not operate a damaged unit.
1

FCC Part 15
This equipment has been tested and found to comply with the limits for a Class A digital device,pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. Thisequipment generates, uses, and can radiate radio frequency energy and, if not installed and usedin accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in whichcase the user will be required to correct the interference at his own expense.

CautionChanges or modifications to this equipment not expressly approved by TEAC CORPORATION forcompliance could void the user's authority to operate this equipment.

DISCLAIMERTEAC disclaims all warranty, either expressed or implied, with respect to this product and theaccompanying written materials. In no event shall TEAC be liable for any damages whatsoever(including, without limitation, damages for loss of business profits, business interruption, lossof business information or other loss) arising out of the use of or inability to use this product.

2

Table of Contents
１．TD-250T Controls and Functions ································ 5
1-1 Front Panel ···················································5
1-1-1 Status Display ·············································5
1-1-2 Numerical Display ········································· 5
1-1-3 Control Key ···············································6
1-2 Rear Panel ·····················································7
1-2-1 Protective Ground Terminal···································7
1-2-2 Frame Ground (F.G)···········································7
1-2-3 Option Space ················································7
1-2-4 AC Power Input Terminal ·····································7
1-2-5 Signal I/O Terminal ·········································8２．Connection
2-1
2-2
2-3
2-4
2-5
2-6
2-7

Connecting Screwless Terminal ··································9Connecting Strain Gage Sensor ··································9Connecting Power Input Terminal ·································9Connecting TEDS Terminal ·······································10Connecting High/Low Level Relay ·······························10Connecting HOLD Signal and Digital ZERO Signal ·················11Connecting Voltage Output (V-OUT) ······························11

３．Setup Mode
3-1
3-2·················································· 9················································· 12

Selecting Setup Items ·········································12
List of Setup Items ···········································13４．Calibration················································ 14

Equivalent Input Calibration ····································14Real Load Calibration ··········································14TEDS Calibration ··············································14
4-1 Common Procedure in Calibration ·······························15
Locking and Unlocking CAL Values·······························15
Minimum Scale Setting··········································15
4-2 Procedure of Equivalent Input Calibration ······················16
4-3 Procedure of Real Load Calibration ·····························17
4-4 Procedure of TEDS Calibration ··································19
4-4-1 The Rated Capacity Display Digit in TEDS Calibration ·······20

５．Function Settings ··········································· 21
5-1 High and Low Limit ············································21
5-2 High-Low Comparison Mode ······································22
5-3 Hysteresis ·····················································22
5-4 Digital Offset ·················································23
5-5 Zero Vicinity ··················································23
5-6 Digital Filter ·················································24
5-7 Analog Filter ··················································24
5-8 Motion Detect ··················································25
5-9 Zero Tracking ··················································26
5-10 Hold Mode ······················································27
5-11 Minimum Scale ··················································27
5-12 Display Update Rate ············································28
5-13 Bridge Excitation Voltage ······································28
5-14 External Hold Mode ·············································29
5-15 External Output Data Moving Average Setting ····················293

６．Hold Function
6-1
6-2·············································· 30

Peak Hold ······················································30
Sample Hold ····················································31

７．Digital Zero Function ········································ 32
８．BCD Data Output(TD-250T03) ··································· 33
8-1 Connector Pin Assignment ·······································33
8-2 Changing Logic ················································34
8-3 Equivalent Circuit ·············································34
8-4 Signal Timing ················································35
8-5 BCD Data Refresh Rate ··········································35

９．RS-232C Interface（TD-250T04） ······························· 36
9-1 Communication Specification ···································36
9-1-1 Standard·····················································36
9-1-2 Connector Pin Assignment ·····································36
9-1-3 Cable························································36
9-2 Setting RS-232C Interface ······································37
9-3 Communication Mode ············································37
9-3-1 Mode 0 ·······················································37
9-3-2 Mode 1 ·······················································37
9-4 Communication Format ···········································38
9-4-1 Mode 0 ·······················································38
9-4-2 Mode 1 ·······················································42

10．D/A Converter (TD-250T07) ···································· 43
10-1
10-2
10-3
10-4
10-5

Using Output Voltage and Current ······························43
Setting D/A Zero ·············································44
Setting D/A Full-Scale ········································44
D/A Output Error ··············································45
Resolution ····················································45

11．Over-Scale and Error Indications ····························· 46
12．TEDS························································· 47
12-1 TEDS Write Function (F4-5) ····································47
12-2 TEDS Data Recovery Function (F4-6)·····························48
12-3 TEDS Sensor Verification ······································48

13．Operation on Power On ········································ 49
14．Warranty····················································· 49
15．Specifications··············································· 50
16．External View················································ 51

4

1.

TD-250T Controls and Functions
1-1

1-1-1

Front Panel

Status Display
Displays the TD-250T status
HI ：Lights when the indication level is higher than the preset maximum level.
(Indication Level > High Limit) The High Limit relay will be engaged.

OK ：Lights when the indication level between the preset High and Low Limit level.
(Preset Low Limit ≦ Indication level≦Preset High Limit)

LOW ：Lights when the indication level is lower than the preset Low Limit level.
(Indication level<Preset Low Limit) The Low Limit relay will be engaged.

PEAK ：Lights when the peak hold feature is enabled.

HOLD ：Lights when the indicated level is in hold state.

1-1-2

Numerical Display
Displays the following three indications
１）

Indication Level

２）

Preset Level

３）

Overflow Status

・ A/D Converter Negative Overflow-LOAD

・ A/D Converter Positive Overflow

LOAD

・ Display Underflow(below -19999)-Full

・ Display Overflow(above 19999)

Full

5

1-1-3Control Key
Saves setup and command operations.

GAIN

FNC

UP

HOLD

TEDS

LEFT

ENTER

RIGHT

CAL

ESC

DOWN

ZERO

GAIN

【ＧＡＩＮ】
Performs the real load calibration

TEDS【ＴＥＤＳ】
Performs the calibration when a TEDS sensor is connected

CAL

【ＣＡＬ】
Performs the equivalent input calibration

FNC

【ＦＮＣ】
Changes to Setup menu in indication level display mode.
Changes the setup menu in setup mode.
Changes to the user define menu when pushing this key slightly longer in theindication level display mode.
Changes the sign and decimal point in setup mode.

ESC

【ＥＳＣ】
Cancels the setup and returns to the indication level display.

HOLD【ＨＯＬＤ】
Enables the HOLD function. To release the HOLD mode, press the HOLD key again.

ZERO

ENTER

【ＺＥＲＯ】
Performs Zero calibration when the CAL LOCK is OFF.
Force the indication level reading to zero when the CAL LOCK is ON.
(Digital Zero Function)【ＥＮＴＥＲ】
Confirms the setup selection and value.
Releases the Key Lock/Unlock in the indication level display mode when holding
for a few seconds.
When KEY LOCK is enabled, all key controls are disabled. Releasing the KEY LOCK
is done by holding for a few seconds.

UP

DOWN

LEFT

RIGHT

【ＵＰ/ＤＯＷＮ/ＬＥＦＴ／ＲＩＧＨＴ】
Changes setup selections and values.
Selects a digit for making a change.

6

1-2

Rear Panel

1-2-1

Protective Ground Terminal
To prevent an electric shock hazard, be sure to connect the protective ground to a grounding
source.

1-2-2

Frame Ground (F.G）
F.G Terminal of AC power（chassis and the F.G terminal are connected）

1-2-3

Option SpaceOne of the following options can be installed.
・ TD-250T03 BCD Parallel Data Output
・ TD-250T04 RS-232C Interface
・ TD-250T07 D/A Converter

1-2-4

AC Power Input Terminal
Connects to AC power. (AC100 ~ 240V) (DC power supply is optional)

7

1-2-5 Signal I/O Terminal
Inputs to the control signals (HOLD, DZ), TEDS sensors, strain gage sensors.
Terminal Pin Assignment82.

Connection
2-1

Connecting Screwless Terminal
Use a mini-screw driver when connecting to the screwless terminal.
1. Strip a coating of connecting wire for 10mm~12mm and lightly twist the bare wire.
Applicable wire size is 0.4φ～1.2φ

2.
3.
4.
5.

2-2

Push the button next to the wire insertion hole with a screw driver.
Insert a twisted wire tip carefully.
Release the button
Check for the cable to be securely clamped and does not come out with a slight tug.

Connecting Strain Gage Sensor

ＴＤ－２５０Ｔ

With six wire cable from the load cell, shunt between +EXC and +SENSE, and between -EXC
and -SENSE, then connect to #3 (+EXC) and #5 (-EXC).

2-3

Connecting Power Input Terminal
Connecting AC PowerUse a pressure terminal (M3) when connecting to the terminal
Rating: AC100V ~ 240V (50/60Hz)

Connecting DC Power (Optional)
Rating: DC10V ~ 28V (1A @12V)

9

2-4

Connecting TEDS Terminal
Connect the TEDS signal from the TEDS sensor.
When not using the TEDS feature, leave them un-connected.

2-5Connecting High/Low Level Relay

・Connecting External Load
１）For AC Power Load２）For DC Power Load

・The contact rating is 0.5A/125AVC, 1A/30VDC. Use within the power ratings.
・Install a spark killer for noise reduction close to the load circuit, such as a relay coil.
・For the AC load, use the spark killer constructed with a capacitor and resister in seriesconnection, and for the DC load, use a rectifying diode.
10

2-6

Connecting HOLD Signal and Digital ZERO Signal
・Equivalent Circuit (Input)＜HOLD Input＞

・The external contact draws 8mA in ON state. Use a contact device with 10mA or more capacity.
・Do not apply voltage externally.

2-7

Connecting Voltage Output (V-OUT)
Output voltage is proportionate to the sensor input.
The output voltage is approximately 2V per sensor input 1mV/V.
(The output voltage is based on the sensor's Zero Balance being performed)

11

3.

Setup Mode
3-1

Selecting Setup Items
FNC

Indication Level

FNC

FNC

FNC

F2

F1

FNC

F4

F3

Hold

ESC

FNC

UP

DOWN

Several 100msec later

ENTER

F1-1

Set Value

UP

DOWN

Change Set Value

LEFT

RIGHT

Change Set Digit

FNC

Change Decimal point and Sign

ENTER

ESC
UP

DOWN

F1-2
Several 100msec later

Set Value
UP

FNC

DOWN

UP

DOWN

Change Set Value

LEFT

RIGHT

Change Set Digit

F1-1
Hold

ENTER

Set Value

12

3-2

List of Setup Items

Setup Mode Ｆ１
No

Item

F1-1
F1-2
F1-3

High Limit value
Low Limit value
Hysteresis

F1-4

High-Low comparison mode

F1-5
F1-6
F1-7
F1-8
F1-9

Near zero
Motion detect time
Motion detect window
Zero tracking time
Zero tracking window

Default

Range

75.00
25.00
0

1.00
1.5
5
0
0

-19999～19999-19999～19999
00000～19999
0:Always compare
1:Compare when stabilized
2: Always compare except near zero
3: Compare when stabilized except
near zero
00000～19999
0.0～9.9（sec）
00～99
0.0～9.9（sec）
00～99

Default

Range

0

Key Lock
Setup Val Cal.Val○○○

Ref Pg
17
18

○

18

○
○
○
○
○

19
21
22

Setup Mode Ｆ２
No

Item

F2-1

Hold mode

1

F2-2

Digital offset

0

F2-3

Digital filter

OFF

F2-4
F2-5

Analog filter
Excitation voltage

100
2.5

F2-6

External Hold mode00:Peak hold
1:Sample hold-19999～19999
Moving average number
OFF,4,8,16,32,64（times）
4,10,100,3000（Hz）
10,2.5(V)
0: Level response
1: Pulse response

Key Lock
Setup Val Cal.Val

Ref Pg

○

23

○

19

○

20

○
○
○

20
24
25

Setup Mode Ｆ３
No
F3-1
F3-2
F3-3
F3-4
F3-5
F3-6
F3-7
F3-8

Item
Zero enabled
Hold enabled
Minimum scale
Display times
Cal. value lock
Setup value lock
Direct strain value mode
Digital Zero mode

Default
ON
ON
0.01
3
OFF
OFF
OFF
1

Range
OFF,ON
OFF,ON
00001～19999
3,6,13,25（times）
OFF,ON
OFF,ON
Strain display OFF,ON
0: Digital Zero
1:Analog

Key Lock
Setup Val Cal.Val
○
○
○
○

○
○

Ref Pg23
24
1032

Setup Mode Ｆ４
No
F4-1
F4-2

F4-3
F4-4
F4-5
F4-6
F4-7

Item
BCD refresh rate
RS-232C setup

DA ZeroDA Full scale
TEDS data rewrite
TEDS data restore
Out Put Data Moving Average

Default

Range

100
13100

1,2,5,10,20,50,100（time/sec）
１ ３ １ ０ ０
↓ ↓ ↓ ↓ ↓［Ａ Ｂ Ｃ Ｄ Ｅ］

0
100.002.000
01［Ａ］ Communication mode
０:Command communication mode
1:Continuous TX mode
［Ｂ］ Baud rate
０:1200bps,
１:2400bps
２:4800bps,
３:9600bps
４:19200bps［Ｃ］ Character length
０:7bit, １:8bit［Ｄ］ Parity bit
０:None, １:Odd, ２:Even［Ｅ］ Stop bit
０:1bit, １:2bit
00000～19999
00001～19999

0:Off

13

1:On

Key Lock
Setup Val Cal.Val○○

Ref Pg
30

32

○
○
○
○
○

38
40
41
29

4.

Calibration
A Calibration configures the TD-250T in relation to how the strain gage sensor output isdisplayed. TD-250T offers the following three calibration methods.

◇Equivalent Input Calibration
It is a simple calibration method without using a real load, by manually entering the strain
gage sensor's rated output (mV/V) and the rated capacity (desired value to display).
For example:
For load:
2.001mV/V – 100N
For Pressure:2.002mV/V – 10.00MPa
For Torque:2.502mV/V – 15.00N.m
Entering the values shown above, it automatically computes the gain and display values.

A strain gage sensor usually contains a test result sheet as shown below.
Rated

Capacity･････････････････････ Load（Unit：㎏,ton, etc.）

Rated

Output･･･････････････････････ Voltage（Unit：mV/V）

Nonlinearity････････････････････････ %R.O
Hysteresis･･････････････････････････ %R.O
Input Terminal Resistance･････ Ω
Output Terminal Resistance････ ΩZero Balance･･･････････････････ x10-6
The Rated Capacity and the Rated Output are used in equivalent calibration.

These data are saved in the TEDS sensor’s internal memory.

◇Real Load Calibration
It is an accurate and low-error calibration method by applying a real load to the strain gage
sensor and manually entering the real load value and the maximum capacity value.

◇TEDS Calibration
It is a calibration method using the data stored in TEDS memory in which the rated output level(mV/V) and the rated capacity are recorded.

《 Before Calibration 》
When the sensor is connected and it displays “Unstable” or “Error”,
a calibration cannot be performed.
In such case, switch to the Strain Quantity Direct Read mode (F3-7), whichdisplays the sensor output of 0~±3mV/V as 0~±6000.
Press

FNC

3 times to select Mode3, and press

select F3-7, then enter

ENTER

to select “ON”, then press

ENTER

key. UsingUP

key followed by

It switches to the Strain Quantity Direct Read mode.

14

6 times to

UP
or

DOWN
ESC

.

4-1

Common Procedure in Calibration
Three calibration methods are available. The CAL LOCK, UNLOCK and MIN Scale setting are common
in all three methods.
CAL UNLOCK

・Release the CAL LOCK state.

MIN Scale・Set the desired digital minimum resolution value.
This can be set during or after the calibration.

Eqiv. Input CALTEDS CALReal Load CAL

Select a CAL method.

・ Set CAL LOCK to ON to prevent any error during operation.

CAL LOCK

Locking and Unlocking CAL Values
1) Select MODE3.
Press

3 times to select MODE3.

FNC

2) Select MODE5.
Press3) Using

4 times to select F3-5 then press

UP
or

UP

DOWN

ENTER

4) Confirm with

ENTER

.

key, select “OFF” or “ON”.

, then exit from Setup mode with

ESC.

Minimum Scale Setting (Can be omitted if no change required)
1) Select MODE3.
Press

3 times to select MODE3.

FNC

2) Select MODE3 by choosing “3”.
UP

Press
3) Using

2 times to select F3-3 then press

ENTER

RIGHT

or

LEFT

key, select a digit, then using

UP

or

DOWN

key, change a value.

4) Confirm with

ENTER

, then exit from Setup mode with

15

ESC

.

.

4-2

Procedure of Equivalent Input Calibration
The calibration procedure is as follow.
Clear CAL LOCK・UNLOCK CALMin Scale・MIN Scale Setting (Can be omitted)

Eqiv. Input CAL・Enter the Rated Output Value and the Rated Capacity of the strain
gage sensor.

Lock CAL Value・LOCK CAL

Equivalent Input Calibration
1) Select Equivalent Input Calibration
CAL

Press

then press

ENTER

.

2) Rated Output is displayed in the display unit as (X.XXX) mV/V.
3) The bottom digit flashes. Using
UP

or

DOWN

or

LEFT

, select a digit, then using, change the value.

ENTER , and change to the sensor rated capacity value entry mode.

4) Confirm with

5) The bottom digit flashes. Using
or

UP

RIGH

RIGHT

LEFT , select a digit, then using

DOWN , change the value.

※To change the decimal point, press
6) Confirm with

or

ENTER

FNC

while the desired digit is flashing.

.

7) Set zero point with no-load sensor connected. Confirming that the sensor has
no load, press

ZERO

then

ENTER

.

When the value changes to zero, preceded by “CAL2E”, the equivalent input
calibration is completed.
8) If an error is indicated, make a necessary correction and repeat the calibration.

16

4-3

Procedure of Real Load Calibration
The calibration procedure is as follow.
Clear CAL LOCK・Clear CAL LOCKMin Scale Setting・MIN Scale Setting (Can be omitted)

Zero CAL

・Make a no-load state (no weight is applied to the sensor) then
set the zero point of the strain gage sensor.

Real Load CAL

・Set the value at the maximum capacity and the sensor with a real
load.
・LOCK CAL Value

Lock CAL Value

Real Load Calibration
ZERO1) Confirm that the sensor has no-load then press,

ENTER ..

2) When the value changes to zero preceded by “CAL2E”, the equivalent input
calibration is completed.
3) Apply a real load and press

GAIN4) The bottom digit flashes. Using
RIGHT

or

LEFT

ENTER

,
UP

or

ENTER

or

LEFT

UP

or

ENTER

FNC

while the desired digit is

DOWN, change a value, using,change a digit, then set the maximum capacity value.

※To change the decimal point, press
flashing.
7) Confirm with, change a value, using. It switches to the maximum capacity entry mode.

6) The bottom digit flashes. Using
RIGHT

DOWN

,change a digit, then set the real load value.

※To change the decimal point, press
flashing.
5) Confirm with.

FNC

while the desired digit is.

8) If an error is indicated, make a necessary correction and repeat the calibration.

17

＜Example: Real Load Calibration＞
Case when the real load = 50N and maximum capacity = 100N.
In 4), enter 50.00 (or 50.0 or 50)
In 6), enter 100.00 (or 100.0 or 100)
※When the sensor input is less than 0.3mV/V with real load, calibration cannot be performed.
The values exceeding 3.0mV/V at maximum capacity cannot be set.
For example, with the example above, if the input at 50N is 2.0mV/V, the calculated maximum capacity
value of 100N is to be 4.0mV/V. Such calibration cannot be set.
※ When the values of the real load and the maximum capacity are equal, the procedure 8) is notnecessary.

18

4-4

Procedure of TEDS Calibration
The calibration procedure is as follow.
Clear CAL LOCK・Clear CAL LOCKMin Scale Setting・MIN Scale Setting (Can be omitted)

・The values of TEDS stain gage sensor’s rated output and rated
capacity are automatically registered.

TEDS CAL・LOCK CAL Value

Lock CAL ValueTEDS Calibration
1) Select TEDS Calibration.
Press, then

TEDS

ENTER

.

2) The display shows“――０――”and the TEDS sensor data is retrieved.
3) The retrieved rated output (X.XXX) mV/V is displayed. The bottom digit flashes.
4) Press

ENTER.

5) The rated capacity is retrieved from the TEDS memory and displayed.
The value of significant figure 4000 or less is displayed. (units are ignored)
When changing the displayed value, using
digit, then using

UP

or

RIGHT

LEFT

, select a

DOWN , change a value.
FNC※To change the decimal point, press
flashing.
6) Confirm with

or

ENTER

while the desired digit is.

7) Set zero point with no-load sensor connected. Confirming that the sensor has
no load, press

ZERO , then

.

ENTER

When the value changes to zero, preceded by “CAL2E”, the TEDS
calibration is completed.
8) If an error is indicated, make a necessary correction and repeat thecalibration.

19

4-4-1The Rated Capacity Display Digit in TEDS Calibration
The sensitivity calibration is performed by retrieving the TEDS memory data. A variety of rated
capacities exists, and their rated capacity indication values in TEDS calibration are shownin the table below.

T E D S S e n s o r D a ta
C a lib r a t e d R e s u lt
X .X X X m V / V R a t e d C a p a c it y X .X X X m V / V In d ic a t e d V a lu e

・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・

１Ｎ
２Ｎ
３Ｎ
４Ｎ
５Ｎ
１０Ｎ
２０Ｎ
３０Ｎ
４０Ｎ
５０Ｎ
１００Ｎ
２００Ｎ
３００Ｎ
４００Ｎ
５００Ｎ
１ｋＮ
２ｋＮ
３ｋＮ
４ｋＮ
５ｋＮ

・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・

20

０１．００００２．００００３．００００４．０００００５．０００１０．０００２０．０００３０．０００４０．００００５０．００１００．００２００．００３００．００４００．０００５００
０１．００００２．００００３．００００４．０００００５．００5.

Function Settings

5-1

High and Low Limit

When the indication value exceeds the the preset High Limit, the HI relay turns ON, and falls below
the preset Low limit, LOW relys turns ON.
HI/LOW relay output condition
HI：

Indicated value > High limit

LOW：

Indicated value < Low limit

Setting a High Limit
1) Select MODE1.
Press

to select MODE1.

FNC

2) Confirm F1-1 in the display and press
UP3) The bottom digit flashes. Using
or

RIGHT

LEFT

ENTER

or

DOWN

.
, change a value, using, select a digit, then set a desired value.

※To change the sign, press
4) Confirm with

ENTER

while the desired digit is flashing.

FNC

then exit from Setup mode with

ESC.

Setting a Low Limit
1) Select MODE1.
Press

to select MODE1.

FNC

2) Select 1 in MODE2.
Press

once thenUP3) The bottom digit flashes. Using
RIGHT

or

LEFT

ENTER

UP

or

DOWN

, change a value, using, select a digit, then set a desired value.

※To change the sign, press
4) Confirm withto select F1-2.

ENTER

FNC

while the desired digit is flashing.

then exit from Setup mode with

ESC.

※ When an invalid value as a condition below is entered,“Err08”is shown.
High Limit value ≦ Low Limit value

21

5-2

High-Low Comparison Mode

Setting
1) Select MODE1.
FNC

Press

to select MODE1.

2) Select 4 in MODE1.
UP

Press

once thenENTER

to select F1-4.

3) The bottom digit flashes. Using
or DOWN, select a desired
UPvalue.
3：Compare in stable and when not zero vicinity
2：Compare when not zero vicinity
1：Compare in stable
0：Always compare4) Confirm with

ENTER

then exit from Setup mode withESC.

Except High-Low Comparison Mode 0 (Always Compare), it is closely related with zero vicinity
and Motion Detect.
Refer to “Zero Vicinity” in pg.19 and “Motion Detect” in pg.21 for the detail.
5-3

Hysteresis
It is a Time Window when the High-Low Comparison turns OFF. Generally when the indication value
exceeds the preset High Limit, it turns ON, and when it falls below the preset Low Limit, it
turns OFF. With the Hysteresis however, it turns OFF at the preset Hysteresis level below theHigh Limit. (Likewise for the Low Limit)

It is effective in preventing a chattering when the signal is fluctuating (vibrating) in small
level.
<Comp. Condition> ・High Limit

ON
OFF：Indicated value > High Limit value：Indication value ≦ (High Limit – Hysteresis values)

・Low Limit

ON：Indication value < Low Limit valueOFF：Indication value ≧ (High Limit + Hysteresis values)※ Be sure to set (High Limit – Hysteresis values) ≧ Low Limit value

Setting
1) Select MODE1. Press

FNC

to select MODE1.

2) Select 3 in MODE1.
Press

UP

twice andENTER

3) The bottom digit flashes. Using
RIGHT
4) Confirm with

or
ENTER

LEFT

to select F1-3.
UP

or

DOWN

, change a value, using, select a digit, then set a desired value.

then exit from Setup mode with

22

ESC

.

The available Hysteresis window is equal in both High Limit and Low Limit side.
5-4

Digital Offset
It deducts a preset value from the indication value. When the digital offset is set, the indication
value minus preset offset value is displayed. Use this feature when zero cannot be set in no-loador wanting to add an offset.
(Displayed value) = (Actual value) –(Digital offset preset value)

Setting
1) Select MODE2.
Press

twice to select MODE2.

FNC

2) Select 2 in MODE2.
Press

UP

once thenENTER3) The bottom digit flashes. Using
RIGHT
4) Confirm with

5-5

or
ENTER

LEFT

to select F2-2.
UP

or

DOWN

, change a value, using, select a digit, then set a desired value.

then exit from Setup mode with

ESC.

Zero Vicinity
It detects when the indication value is close to zero.
The operation and non-operation near zero are closely related to the High-Low Limit comparison.
Refer to “High-Low Comparison Mode” in pg. 18.

Setting
1) Select MODE1
Press

FNC

twice to select MODE1.

2) Select 5 in MODE1
Press

UP

4 times then3) The bottom digit flashes. Using
RIGHT
4) Confirm with

or
ENTER

LEFT

to select F1-5.

ENTER
UP

or

DOWN

, change a value, using, select a digit, then set a desired value.

then exit from Setup mode with

It operates in absolute value near zero.

23

ESC

.

5-6

Digital Filter
It applies a moving average to the A/D converted data to reduce the fluctuation of the indication
value. The available number of moving average is from 4 to 64.

Setting
1) Select MODE2.
Press

FNC

twice to select MODE2.

2) Select 3 in MODE2.
Press

UP

twice thento select F2-3.

ENTER3) The bottom digit flashes. Using
value.

UP
OFF
4
8
16
32
64

4) Confirm with

5-7

ENTER

or

DOWN

, select a desired：No averaging：4 times：8 times：16 times：32 times：64 times

then exit from Setup mode with

ESC.

Analog Filter
It is a low-pass filter that filters the input signal from the strain gage sensor and removes
unwanted noise components. The cutoff frequency can be set between 4Hz and 3KHz. The higher the
cut-off frequency is set, the faster the response is expected. However the noise component tends
to appear more in faster response.

Setting
1) Select MODE2.
Press

FNC

twice to select MODE2.

2) Select 4 in MODE2.
Press

UP

3 times then3) The bottom digit flashes. Using

4) Confirm with

ENTER

to select F2-4.

ENTER

DOWN

UP

or

4
10
100
3000

：4Hz
：10Hz
：100Hz：3KHz, select a desired value.

then exit from Setup mode with

24

ESC

.

5-8

Motion DetectSet parameters to detect the stability. The signal is compared with the one from 100 msec prior,and if it fits within the preset amplitude range, then such condition continues for the preset
length, it determines that the indication value is STABLE.

The stable/unstable condition is closely related to the High-Low Limit comparison.
Refer to “High-Low Comparison Mode” in pg. 18.

Setting
1) Set Motion Detect time. Select 6 in MODE1.
Press

FNC

then

2) Press

ENTER

and the bottom digit flashes. Usingchange a value, using

UP

five times to select F1-6.

RIGHT

a desired value. Confirm with

or

LEFT

ENTER

.

UP

or

DOWN

,

, select a digit, then select3) Select a Motion Detect Range.
Press

UP

to select F1-7, then

4) The bottom digit flashes. Using
RIGHT
5) Confirm with

or

LEFT

ENTER

ENTER

.

or

DOWN

UP

, change a value, using, select a digit, then select a desired value.
then exit from Setup mode with

A range of Motion Detect Delay is 0.0 ~ 9.9.
A range of Motion Detect Band is 00 ~ 99.

25

ESC

.

5-9

Zero Tracking

A gradual zero drift is automatically detected and compensated.
・ It automatically moves a drifted zero point to zero at every preset time interval,
only when the drift is within a specified amount.
・ The tracking delay is 0.1~9.9 sec and the tracking band is set in weight unit.
・ The Zero Tracking is disabled when the tracking delay and the tracking band are set
to "0".
・ It is active only when the setup mode "F3-5", CAL LOCK is ON and "F3-1", ZERO is
ON.

Setting
1) Set Zero Tracking Time. Select 8 in MODE1.
Press2) Press

FNC
ENTER

then

UP

7 times to select F1-8.

and the bottom digit flashes. Using

to change a value, using

RIGHT

desired value. Confirm with

LEFT

or

ENTER

UP

DOWN

or

to select a digit, select a.

3) Set Zero Tracking Band
Press

UP

to select F1-0 then press

4) The bottom digit flashes. Using
using

UP

or

5) Confirm with

DOWN
ENTER

RIGHT

ENTER
or

.
LEFT

to change a value,

to select a digit, select a desired value.
then exit from Setup mode with

The range of Zero Tracking Delay is 0.0~9.9sec.
The range of Zero Tracking Band is 00~99.

26

ESC

.

5-10 Hold Mode
TD-250T has the Peak Hold function and the Sample Hold feature. The former holds the peak(maximum) input signal level, and the latter holds an input signal at an arbitrary time.

Setting
The HOLD function is available only when the MODE F3-2 is set to ON.
1) Select MODE2
Press

FNC

twice to select MODE2.

2) Select 1 in MODE2 then press
3) The display flashes. Using

.

ENTER
UP

DOWN

or

, select a desired value.

1: Sample Hold
0: Peak Hold
4) Confirm with

5-11

ENTER

then exit from Setup mode with

ESC.

Minimum Scale
Set the minimum value or resolution of the change in digital value.

Setting
1) Select MODE3.
Press

FNC

3 times to select MODE3.

2) Select 3 in MODE3.
Press

UP

2 times then3) The bottom digit flashes. Using
RIGHT

or

4) Confirm with

ENTER

to select F3-3.
or

UP

DOWN

to change a value, using

LEFT

to select a digit, select a desired value.

ENTER

then exit from Setup mode with

27

ESC

.

5-12 Display Update Rate
Set the display update rate of the indicator. The sample frequency of the A/D converter is
100 per second.

Setting
1) Select MODE3
Press

FNC

3 times to select MODE3.

2) Select 4 in MODE3.
Press

UP

3 times then3) The bottom digit flashes. Using

ENTER

to select F3-4.
or

UP

DOWN

, select a desired refresh

rate from 3 ~ 25/sec.
4) Confirm with

ENTER

then exit from Setup mode withESC.

5-13 Bridge Excitation Voltage
Set the bridge excitation voltage for the strain gage sensor.

Setting
1) Select MODE2.
Press

FNC

2 times to select MODE2.

2) Select 5 in MODE2.
Press

UP

4 times then3) The bottom digit flashes. Using
10V.
4) Confirm with

ENTER

to select F2-5.

ENTER
UP

or

DOWN

, select either 2.5V orthen exit from Setup mode with

ESC.

＊ When the TEDS sensor is connected, the sensor data is retrieved then automatically set to B.V,
which is lower than the sensor’s maximum excitation voltage.

28

5-14 External Hold Mode
Select a response setting of the External Hold input (pin 9 & 10 of In/Out terminal).

Setting
1) Select MODE2.
Press

2 times to select MODE2.

FNC

2) Select 6 in MODE2.
Press

5 times thenENTER3) The bottom digit flashes. UsingUP

UP

to select F2-6.
or

DOWN

, select a desired value.

1: Pulse Response
0: Level Response
4) Confirm with

5-15

ENTER

then exit from Setup mode with

ESC.

External Output Data Moving Average Setting
For D/A converter, RS-232C, BCD data output, to set its moving average processing(64 times) for stability or not. For Factory ship out setting is valid.

Moving average processing for stability:
It is the one method for reduce output data variation with multiplying 64 times ofmovingaverage when less variation for internal A/D data value (wobbling as noise) .

Setting
1) Select MODE2.
Press

4 times to select MODE4.

FNC

2) Select 7 in MODE4.
Press

1 times thenENTER3) The bottom digit flashes. Using

UP

DOWN

to select F4-7.
or

DOWN

, select a desired value.

1: On
0: Off4) Confirm with

ENTER

then exit from Setup mode with

29

ESC

.

6.

Hold Function
6-1

Peak Hold

30

6-2

Sample Hold

31

7.

Digital Zero Function
It is a function to reset the indication value to zero with a key operation.

Operation
1) Perform Digital Zero.
Press

ZERO

.

2) When the indication value changes to zero, it is complete.
It operates only when the CAL LOCK of setup mode F3-5 is ON, and the ZERO of F3-1 is ON. The
digital zero is cleared once the power is turned off.
3)

For Digital Zero Function.
This indicator can be selected by F3-8 for Zero balance with both analog and digital mode or onlywith digital mode.
“1” for F3-8 case. Zero balance with both analog and digital mode.
This function is approx 1 sec. Zero balance can be taken with analog, so when zero balancecompleted, the back side terminal pin 7 and pin 8 of analog voltage output becoming nearlyZERO [V].
For Factory ship out setting is 1.
“0” for F3-8 case. Zero balance with only digital circuit and it will complete about 0.1 sec.

32

8.

BCD Data Output(TD-250T03)
The BCD Data Output is an interface that outputs the indication value in BCD coded value. This
interface is used when connecting to a computer, process controller, sequencer, etc. It is convenientwhen using controlling, recording or data collection processes. The TD-250T internal circuit andthe external connecting circuit are electrically isolated with a photo coupler.
＊Install an included ferrite core on the output cable to reduce unwanted radiation.

8-1

Connector Pin Assignment
ＡｍｐｈｅｎｏｌＣｏｎｎｅｃｔｏｒ ３６ｐｉｎ

No.

No.

1

Output

COM

19

COM

2

〃

1

20

NC

3

〃

2

21

〃

4

〃

4

22

5

〃

8

23

Nagative(Polarity)

6

〃

10

24

OVER

7

〃

20

25

P.C(Stable)

8

〃

40

26

9

〃

80

27

Input

10

〃

100

28

〃

11

〃

200

29

NC

12

〃

400

30

〃

13

〃

800

31

〃

14

〃

1000

32

〃

15

〃

2000

33

〃

16

〃

4000

34

〃

17

〃

8000

35

〃

18

〃

10000

36

〃

Adaptive Connector ：DDK-5730360

corresponding

33

OutputZero Vicinity

STROBEBCD Date Hold
Date Logic Switch

8-2

Changing Logic
Make a logic selection of the output signal using a pin 28.
False logic – when COM and pin28 are open, True logic – when both are shorted

8-3

Equivalent Circuit

OutputVce = 30V(max)Ic = 50mA(max)Input

Caution・Never apply voltage externally to the input.
・Use an external device with a capacity of 10mA or more.

34

8-4

Signal Timing・PC
It turns ON synchronizing with the BCD data when stable. When reading the data, be sure to wait
25msec or more from the P.C End edge timing.

・OVER
It outputs when -LOAD, LOAD, OFL1 or OFL2.

・STROBEThe strobe pulse is output synchronizing with the BCD data. When reading the data, fetch thedata at the rising edge of this pulse. The refresh rate of the BCD data can be changed in Setup.

8-5

BCD Data Refresh Rate

Setting
1) Select MODE4.
Press

FNC

4 times to select F4-1, then press

2) The display flashes. Using

UP

or

DOWN

ENTER
.

, select a desired value.

1:
1 time/sec
2:
2 times/sec
5:
5 times/sec
10:
10 times/sec
20:
10 times/sec
50:
50 times/sec
100: 100 times/sec
3) Confirm with

ENTER

then exit from Setup mode with

35

ESC

.

9.

RS-232C Interface（TD-250T04）
The RS-232C interface is used to read status or data from, or write setup data to TD-250T. It is
used when connecting to a computer, process controller, sequencer, etc. It is convenient whencontrolling or recording. The TD-250T internal circuit and the external connecting circuit areelectrically isolated with a photo coupler.
9-1

Communication Specification
9-1-1

Standard

Signal Level:
Transmission Distance:
Communication Method:
Transfer Speed:
Start Bit:
Bit Length:
Stop Bit:
Parity Bit:
Code:
9-1-2

RS-232C Compatible
Approx. 15m
Synchronous, Full Duplex
1200, 2400, 4800, 9600, 19200bps
1
7 or 8 selectable
1 or 2 selectable
None, Odd or Even selectable
ASCII

Connector Pin Assignment

Adaptive Plug: 25-pin D-SUB Connector ( DB-25P-NR made by JAE )
No.
No.
1
ＦＧ
14
2
Output
ＴｘＤ
15
3
Input
ＲｘＤ
16
4
Output
ＲＴＳ
17
5
Input
ＣＴＳ
18
6
19
7
ＳＧ
20
Output
ＤＴＲ
8
21
9
22
10
23
11
24
12
25
13
26
9-1-3

Cable

36

9-2

Setting RS-232C Interface
Set up the RS-232C communication parameters of RD-250T.

Setting
1) Select MODE4.
Press

4 times to select MODE4.

FNC

2) Select 2 in MODE4
Press[UP] once then

[ENTER] to select F4-2.
ENTER3) The bottom digit flashes. Using
RIGHT

Or

LEFT

or

UP

DOWN

top change a value,

to select a digit, set a parameters.

Refer to the table below

１
↓
[ Ａ
[Ａ]

[Ｂ］

[Ｃ］
[Ｄ］
[Ｅ］

３
↓
Ｂ

１
↓
Ｃ

０
↓
Ｄ

０
↓
Ｅ

]

Ｃｏｍｍｕｎｉｃａｔｉｏｎ Ｍｏｄｅ０
Ｃｏｍｍａｎｄ Ｃｏｍｍｕｎｉｃａｔｉｏｎ Ｍｏｄｅ
１
Ｃｏｎｔｉｎｕｏｕｓ Ｂｒｏａｄｃａｓｔ Ｍｏｄｅ
Ｂａｕｄｒａｔｅ０:
１２００bps
１： ２４００bps
２： ４８００bps
３：
９６００bps ４： １９２００bps
Ｃｈａｒａｃｔｅｒ Ｌｅｎｇｔｈ
０:
７ｂｉｔ
１：
８ｂｉｔ
Ｐａｒｉｔｙ Ｂｉｔ
０:
Ｎｏｎｅ
１：
０ｄｄ
２：
Ｅｖｅｎ
Ｓｔｏｐ Ｂｉｔ
０:
１ｂｉｔ
１：
２ｂｉｔ

4) Confirm with

ENTER

then exit from Setup mode withESC.

9-3 Communication Mode
9-3-1 Mode 0
Reading an indication value, status setup values, or writing setup values can be conductedby a command from the host PC.
9-3-2

Mode 1An indication value and the status are continuously transmitted.
37

9-4 Communication Format
9-4-1 Mode 0
The [Request] is data from a host PC to TD-250T and the [Response] is from TD-250T to ahost PC. All data except [CR] and [LF] are ASCII characters.
（[CR]：Carriage Return（0x0D）、[LF]：Line Feed（0x0A））・Reading the indication values (polarity, 5 digits value and decimal point)

・Reading Status (7 digits)

・Writing Setup Values

38

39

40

・Reading Setup Values

・Command (host PC -> TD-250T)
Setting HOLD
When HOLD enabled (F3-2 ON)
CNo Response
E

Releasing HOLD
When HOLD enabled (F3-2 ON)
C[CR]

No Response
F[CR]

Digital Zero
When Zero enabled + CAL LOCK (F3-1 ON + F3-5 ON)
C

G

[CR]

Digital Zero Reset
When Zero enabled + CAL LOCK (F3-1 ON + F3-5 ON)
C

H

41

No Response[CR]

No Response

9-4-2Mode 1

The indication value is continuously transmitted.
0

1

2

3

4

5

6

7

8

9

10 11 12 13 14 15 16 17

18

G

S

,

①

,

②

,

③

,

④

,

[CR] [LF]

±

19

Sign
Indicated Value + Decimal Point①

O・・・Overload（±LOAD、±Full）
S・・・Stable
M・・・Unstable
H・・・Hold
Priority

H > O > (S or M)②

A・・・Zero Tracking OFF
T・・・Zero Tracking ON③

H・・・Max Relay ON
L・・・Min Relay ON
G・・・Max and Min Rely OFF
F・・・Comp Relay OFF
Priority④(H or L) > F > G

N・・・Zero Vicinity OFF
Z・・・Zero Vicinity ON

42

10.

D/A Converter (TD-250T07)
It is a D/A converter to output analog signal referencing to the TD-150T indication value. The
ranges of analog voltage output is 0 ~ ±10V, and the current output is 4 ~ 20mA. Using the D/AZero and D/A Full-Scale settings, a desired analog output Zero (0V, 4mA) and Full-Scale (±10V,
20mA) are obtained. The D/A output and the main body circuit are electrically isolated. The
resolution is 1/±10,000 per 0 ~ ±10V, and the sample speed is 100/sec. The output has about +10%
of over-range head room.
The output is 0V when the output current is 4mA, and 10V when 20mA. The Full-Scale of the output
current and the output voltage cannot be separately selected.
＊ Be sure to install the included Ferrite core to the output cable, to reduce the unwanted noiseradiation.

10-1 Using Output Voltage and Current
For the voltage output, connect an external device (with 2Kohms or more load resistance) tothe "V"+(plus) and the "V"-(minus).
For the current output, connect an external device to the "I"+(plus) and the "I"-(minus). The
maximum load resistance should not exceed 350 ohms including the cable resistance.

4310-2 Setting D/A Zero

Setting
1) Select MODE4
FNC
Press [FNC]

4 times to select MODE4.

2) Select 3 in MODE4.
Press [UP
UP]

ENTER
2 times then [ENTER]

to select F4-3.

3) The bottom digit flashes. Using [UP
UP]

or

DOWN
[DOWN] to change a value,[LLEFT
EFT]

to select a digit, set a desired value.

4) Confirm with [ENTER
ENTER]

ESC
and exit from the Setup mode with [ESC]

RIGH] or
[RIGHT.

10-3 Setting D/A Full-Scale

Setting

1) Select MODE4
Press [FFNC
NC]

4 times to select MODE4.

2) Select 4 in MODE4.
Press [UP ]3 times then [ENTER]
ENTER

3) The bottom digit flashes. Using [UP]
[RIGHT]RIGHT

or[LLEFT
EFT]4) Confirm with [EENTER
NTER]

to select F4-4.
or

DOWN[DOWN] to change a value,

to select a digit, set a desired value.
and exit from the Setup mode with [ESC]
ESC.

Setting Examples
Example 1
DA Zero000.00DA Full-Scale
100.00Ind. ValueDA Output
100.0010V：：
000.000V：：-100.00－10V

Example 2
DA Zero020.00DA Full-Scale
100.00Ind. ValueDA Output
120.0010V：：
020.000V：：-80.00－10V

44

Example 3
DA Zero020.00DA Full-Scale－100.00
Ind. ValueDA Output
120.00－10V：：
020.000V：：-80.0010V

Example 4
DA Zero-10.00DA Full-Scale
20.00
Ind. ValueDA Output
10.00
10V(20mA)：：
000.005V(12mA)：：-10.000V(4mA)

10-4 D/A Output Error
The output error is shown only when the D/A option is installed.
dErr
-dErr

DA output exceeds +10.9V, outside of linear range
DA output exceeds -10.9V, outside of linear range

10-5 Resolution
The D/A converter has a resolution of 1/±10,000 per 0～±10V, and 1/10,000 per 4～20mA.

45

11. Over-Scale and Error Indications
Display
Load
-Load
Full
-Full
oFul
-oFul
Err00
Err01
Err02
Err03
Err04
Err05
Err06
Err07
Err08
Err09
Err0A
ErrFF
dErr
-dErr
cErr0
cErr1
cErr2
cErr3

Description
ADC Plus OverADC Minus Over
Indication Plus Over (19999 or more)
Indication Minus Over (-19999 or less)
Actual input is more than 3.3mV/V
Actual input is less than -3.3mV/V
Zero balance is timed out
Input in CAL is more than 3.3mV/V
Span setting is 0000
Sensor output is not enough for adjustment (0.28mV/V)
Sensor output is negative
Valid TEDS sensor is not connected
Incorrect password for TEDS writing
Invalid setting parameter
Exceeding output rating (more than 0.28mV/V, or less than 3.3mV/V)
Sensor is different from the one of the TEDS CAL time
Other errors
DA output is more than 10.9V
DA output is more than -10.9V
C-000 check error (internal RAM)
C-001 check error (external SRAM)
C-002 check error（SCI0 EEPROM）
C-003 check error (SCI1 DS2480B)

46

12. TEDS
By connecting a sensor complying with IEEE1451.4（Transducer Electronic Data Sheet (TEDS)）,
TD-250T can retrieve the rated output values stored in the sensor, and applies them to theindicator’s calibration process. It also can save the self-calibrated values into the TEDS
sensor.
The following TEDS sensors are compatible with such functions.

IEEE1451.4 (V0.9)

TEDS Specification
IEEE1451.4 (V1.0)
Template ID
Bridge Sensors（33） Strain Gage（35）

×

◎

○

Others×◎：TEDS calibration correspondence 、F4-5、F4-6 correspondence○：TEDS calibration correspondence
×：Non-correspondence
12-1 TEDS Write Function (F4-5)
It updates the calibration data stored in the TEDS sensor with the data from which the real loador equivalent calibration has been performed.
Refer to “4-4-1 The Rated Capacity Display Digit in TEDS Calibration” for the indication values.
For example, when performing the real load calibration and writing the indication value of“100.00” into the TEDS memory, and then the TEDS calibration is performed, the capacity
indication value is NOT “100.00” but “0100.0”.
Writing Data
1) Select MODE 4
Press

[FNC
FNC ] 4 times to select MODE4.

2) Select 5 in MODE4.
Press [UPUP] 4 times then [ENTER]
ENTER

to select F4-5.

3) The bottom digit flashes. Using [UPUP]

or [DDOWN
OWN]

LEFT
[LEFT]

RIGHT, and [RIGHT]or, enter as“00015”.
ENTER4) Confirm the entry with.

5) A moment after “--0-- ”is displayed, the calibration value of the equivalentor real input previously performed is displayed. Confirm by pressing [ENTER
ENTER]
2 times.
6) Then enter the year, month and day that the calibration is conducted using[RIGHT]
RIGHT ,

FT]
[LE
LEFT

,

[ UPUP] and[DOWN] keys.
DOWN

7) A moment after“--0-- ”is displayed during the data write, it displays MODE4
then returns to the key entry state.
8) Press [ESC
ESC] to finish MODE4 and return to the display mode.

47

12-2 TEDS Data Recovery Function (F4-6)
It restores the TEDS data with the factory default values that is stored in the TEDS’ SUB area.
Recovering Data
1) Select MODE4
Press

[FNC
FNC ] 4 times to select MODE4.

2) Select 6 in MODE4.
Press [UPUP] 4 times then [ENTER]
ENTER

to select F4-5.

3) The bottom digit flashes. Using [UP]or [DOWN
DOWN][LEFT]LEFT

RIGHT, and [RIGHT]or, enter as“00015”.

4) Confirm the entry with

ENTER

.

5) A moment after “--0-- ”is displayed, the recovery data is retrieved from the
TEDS memory and the rated output is displayed. Confirm by pressing[ENTER]
ENTER.

6) Then the indication value is displayed. Confirm by pressing[ENTER
ENTER ].

7) A moment after“--0-- ”is displayed during the data write, it displays MODE4-6
then returns to the key entry state.
8) Press [ESC
ESC] to finish MODE4 and return to the display mode.

12-3 TEDS Sensor Verification
The 1-Wire device in the TEDS sensor stores a device specific 64-bit Registration number. By
remembering the Registration Number during the calibration, a TD-250T verifies the same TEDS
sensor used in the TEDS calibration.
This 64-bit Registration Number will not alter even if the TEDS data, such as rated output, in
the EEPROM is updated.
MSB
8bit
CRC

64bit Registration ROM Number
48bit
Serial Number＜On TEDS Calibration＞
Saves 64bit Registration Number＜On Equivalent Input, Real Load Calibration＞
Clears 64bit Registration Number with zero

48

LSB
8bit
Family Code13. Operation on Power On
When the power is turned on with the following keys pressed, the specified operation check is
performed.
Operation
Self Check

Key
ESC

Check Items
Internal RAM
External SRAM
SCI0(EEPROM)
SCI1(DS2480B)

Self Check & Setting ESC + ENTER
to Default (Init.
Factory Setting)Internal RAM
External SRAM
SCI0(EEPROM)
SCI1(DS2480B)

Display during Self Check:・C-000 Internal RAM Read Write Check
・C-001 External SRAM Read Write Check
・C-002 SCI0（EEPROM）Read Write Check
・C-003 SCI1（DS2480B）Communication Check

14 Warranty
TEAC warrants that TD-250T has been manufactured in accordance with the prescribed
specifications and is free from defects in material and/or workmanship.
If any non-conformity to the specifications or defect in material and/or workmanship isfound during the warranty period,contact our sales department or the dealer from whom you
purchased our product.

49

15. Specifications
1) Excitation

Voltage
Current2) Signal I/O range
3) Equivalent Input/TEDS
Calibration Range
Calibration Accuracy
4) Zero Adj. Range
5) Min. Input Sensitivity：DC10V, 2.5V±10%：120mA when using DC power option (30mA)：0~±3.0mV/V：0.3~3.0mV/V：0.1%F.S. or less @ sensitivity 0.5mV/V or more
：0~±2.0mV/V：1μV/count
Guaranteed 1/10000 @ 1mV/V or more input
6) Accuracy Non-Linearity：0.02%F.S. or less @ input 1mV/V or more
Zero Drift：0.5μV/℃ or less (input converted value)
Gain Drift：25ppm/℃ F.S. or less
7) A/D Conversion Rate：100 times/sec
8) Analog Filter：4, 10, 100Hz(default), 3KHz
Selectable on the front panel
9) TEDS Function：IEEE1451.4 Class2 Mix Mode Interface
10) Peak Hold Function (Analog and Digital Methods)
Response Speed：Approx. 1KHz (Width 2mS：3mV/V Input @ Analog Filter 3kHz)
Accuracy：0.2% FS or lessReset Time
：50μｓ or less
11) Display
Char. Height：16mm 7 segments red LED, 5 digits numeric display
Display Range：±19999
Decimal Point：Selectable
Display Cycle：3, 6, 13 or 25/sec
12) Display Items
Status ：HI,OK,LOW,PEAK,HOLD,CALIBRATION LOCK,SETTING LOCK LED 713) Setup Items CAL Setup ：Zero CAL/Span CAL (TEDS CAL, Real Load CAL, Equiv. Input CAL)
Function Setup ：High Limit, Low Limit, High/Low Limit Comp. Mode, Hysteresis, Zero
Vicinity, Digital Filter, Analog Filter, Motion Detect, Zero
Tracking, Digital Zero, Zero Offset, Hold Mode, Key Lock,
Minimum Scale, Display Cycle, Excitation Voltage, B.C.D.
Refresh Rate, RS-232C, D/A Converter
14) External Signal：High/Low Limit Relay Contact Output, Analog Voltage Output
Hold Signal Input, Digital Zero Signal Input
15) Options：B.C.D. Parallel Data Output
TD-250T03
RS-232C Interface
TD-250T04
D/A Converter Voltage Current Output
TD-250T07
16) Power Supply：AC85V~264V
Approx. 7W：DC10V~28V
Approx. 9W (Option)17) Ambient Condition Temp.
Humidity18) Dimensions19) Weight20) Accessories

21) Standard

EMC

Safety Standard：Operation-10~+40℃
Storage-40~+80℃：85% RH or less (non-condensation)：96W x 96H x 146D (mm) (excluding protrusion)：Approx. 1Kg：AC cable 3m
CD-ROM Operation Manual1
Quick Operation Manual
1
B.C.D. Output Connector Plug 57-30360 DDK 1
when B.C.D. Option is used
Ferrite Core B.C.D when D/A Option is used
：VCCI (class A)
EN61326 (class A)
EN61000-3-3：EN61010-1

50

EN61000-3-2

16.

External View

51