Teac TD-35 User manual

Digital Strain Indicator
ＴＤ−３５
Operation Manual
Teac Corporation
Ver 2006/ 4/18
P/N D009185‑00C
1

Preface
Thank you for purchasing a TD‑35 Digital Strain Indicator.
Read this manual and understand the contents correctly before using the product
for the best performance of the TD‑35.
Warranty
This is a product that has passed a strict in‑house quality inspection. We will
repair or exchange it upon any failure or trouble of this product according to
the service standard prescribed by TEAC Corporation. This TEAC warrantee shall
also fully comply with any local product liability law.
Teac Corporation
Headquarter Sales Department:
3‑7‑3, Nakacho Musashino‑shi, Tokyo 180‑8550 Japan TEL: (0422) 52‑5082
Contacts for Technical Support
Business Solutions Company Sales Department Sales 1 Group
TEL (0422) 52‑5074 E‑mail：tic[e-mail]
Hours Mon〜Fri (except Holidays) AM 9:30〜12:00、PM 1:00〜5:00
TEAC Corporation Web Page http://www.tic.teac.co.jp/
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Index
1. Overview...................................................................................... 4
2. Features ...................................................................................... 4
3. Configuration.............................................................................. 4
4. Standard Accessories.................................................................. 6
5. Specifications .............................................................................. 6
6. Operation..................................................................................... 8
7. Measuring Method.................................................................... 12
8. Miscellaneous Materials........................................................... 15
9. External View ........................................................................... 18
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1. Overview
The TD‑35 is a digital strain indicator that suits various strain gauge base
sensors, used for the indication of pressure, load or torque as well as the
load‑cell. This offers the display resolution of ±20000×10‑6 strain. In
addition to the display in strain unit, it is also capable of converting the value
into a real unit such as in Newton (N) using the preset sensor‑output‑value (mV/V)
for direct reading convenience. This operates with a built‑in battery (AAA type)
or external AC power supply (using an AC adaptor).
2. Features
1) Small and compact size.
2) All necessary functions for the static strain indicator are equipped and
ready to make a measurement simply by connecting the sensor.
3) Suited for almost all types of strain gauge base sensors such as load and
pressure.
3. Configuration
1) Pre‑amp 6) Bridge power supply
2) A/D converter 7) Operation controller
3) Display circuit 8) Internal battery
4) Ref. power circuit 9) AC adapter
5) CPU 10) Power circuit
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5

4. Standard Accessories
1) ZR6(Y) Oxyride dry‑cell battery ・・・・・・・・・・・・・・・・ Qty 4
2) Operation Manual ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ Qty 1
3) AC Adapter ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ Qty 1
5. Specifications
Input : Strain gauge type connector
Input connector : NDI‑7R connector
Bridge power supply : Approx. DC 2.5V, Max current 30mA
Input range : ±20000×10−６ strain（±10mV/V）
Zero shift : ±10000×10−６ strain, digital adjustment
Display : Strain display mode : 0±20000×10−６ strain
User display mode : 020000×10−６ strain value
can be converted to an arbitrary user value
within 099999 (with arbitrary decimal point)
Display module : LCD, Character height approx. 12mm,
Display frequency : Approx. 6 times/second
Peak hold : Maximum value during measurement
Calibration accuracy : 0.1％ F.S or less (FS = 20000×10−６ strain)
Linearity :
±1×10−６ strain ＋1digit
Stability Zero : ±0.2×10−６ strain/℃
Stability Sensitivity : ±0.1×10−６ strain/℃
Low battery voltage warning : LCD shows B under approx. 4V
Operating condition
Temperature range : 0〜45℃
Humidity range : Max. 80% RH (without condensation)
Storage temperature range : ‑40〜80℃
Power supply (Internal) : ZR6(Y9) dry battery
(Externnal) :
DC5〜8V AC adapter
(Current consumption) : Approx. 170mA/DC6V (when sensor=120Ω,
Back‑light=OFF)
Battery life : Approx. 8 hours (when ZR6(Y) Oxiride dry‑cell
battery, sensor=120Ω, Back‑light=OFF, at
room temperature)
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Dimension : 150mm(W)x100mm(D)x40mm(H) (excluding umbo)
Weight : Approx. 500g (including ZR6(Y) dry‑cell battery)
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6. Operation
6.1 Functions and controls in rear panel
① DC IN ‑ External Power Input Connector
The power input connector when AC power is used.
Use the supplied accessory AC adapter for the external power.
② POWER ‑ Power Switch
The power switch for the internal battery or the external power.
When the external power is connected, the internal battery is used and not
consumed.
③ LIGHT ‐ Back‑light Switch for LCD
The ON/OFF switch for the display back‑light. Note that twice as much power
is consumed when it is turned on in battery operation.
④ INDICATION ‐ Display Unit Switch
The switch to select whether the strain input is displayed in strain unit
(STRAIN) or the mV/V input is displayed in user defined unit (USER).
When STRAIN is selected, it displays in strain quantity (x10−６ strain),
and when USER is selected, it displays in user defined quantity.
⑤ ZERO ‐ Zero Cancel ON/OFF Switch
The ON/OFF switch of the zero cancel operation.
When it is ON, the zero cancellation is performed by pressing and holding ⑬
"SELECT" on the operation panel and press ⑨↓"ZERO‑RESET".
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When it is OFF, the zero cancel operation is not performed and it displays
the strain quantity with reference to the TD‑35 internal zero in the selected
display mode set in ④. This can be used to check the initial balance value
of the strain gauge or strain gauge sensor.
⑥ INPUT ‐ Sensor Input Connector
The NDIS standard input connector for the strain gauge sensor. Applicable plug
model is PRC03‑12A10‑7M10.5 made by Tajimi‑Musen.
Pin Signal (Cable Color)
Ａ Bridge Voltage ＋ (Red)
Ｂ Bridge Output − (Black)
Ｃ Bridge Voltage − (Blue)
Ｄ Bridge Output ＋ (White)
Ｅ Shield (Yellow)
Ｆ No Connection
Ｇ No Connection
(Color in parentheses is of our companys color)
Strain gauge sensor connecting diagram
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6.2 Operating Function and Controls
⑦ ↑ Key
Used to increase the setting value
⑧ → Key
Used to move the digit during setting value
⑨ ↓ Key (ZERO‑RESET)
Used to decrement the setting value or zero cancellation when used together
with ⑬ key.
⑩ ← Key
Used to move the digit while setting value
⑪ ENTER Key
Used to set the value in various settings
⑫ PEAK HOLD Key
Used to select the peak hold operation
It holds and displays the maximum value of the A/D sampling data. During
the peak hold operation, [P] is displayed in the LCD. When [P] is displayed,
press this key again and [P] disappears indicating that the peak hold mode
is canceled, the display mode returns to normal.
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⑬ SELECT Key
Used to combine with other keys for various operations
Key Operation Operation
⑬SELECT Key ＋ ⑨↓Key Zero cancel
⑬SELECT Key ＋ ⑪ENTER Key USER unit display
⑬SELECT Key ＋ ⑧ →Key
⑩ ←Key
Set values or decimal point in
USER unit display mode
6.3 Internal Battery and Replacement
The AAA type Oxiride dry‑cell battery is recommended but any other AAA type
battery may be used. However the operating time will vary depending upon the
battery used. The operating time of approx. 8 hours described in the
specification is under the conditions of a ZR6(Y) Oxiride dry‑cell battery
used at room temperature. When the voltage drops below 4V, [B] is displayed
on the LCD. When it occurs replace the battery or switch to the external power
source soon. When replacing the battery or switching to the external power,
turn off the POWER switch ② in the rear panel. (Note that it does not
automatically switch to the external AC power source in battery operation)
Battery Storage
It is installed in the area where the lid in the rear panel slides.
Rear View
→Slides to this direction
MADE IN JAPAN NO.
SERIAL
MODEL NO.
TEAC INSTRUMENTS CORP
DIGITAL STRAIN INDICATOR
5‑12V 0.3‑0.14A
ＴＤ−３５
Battery Storage
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7. Measuring Method
7.1 Notes in Measurement
■ TD‑35 is a strain measuring instrument primarily for the static strain (DC
〜about 3Hz).
The A/D sampling frequency of TD‑35 is 6Hz. For the strain measurement of a
higher frequency component, use the dynamic strain measuring instrument
instead.
■ Because the signal from the strain gauge or sensor is minute, pay special
attention to noise intrusion.
For the signal cable from the sensor, use the dedicated 4‑wire shielded cable.
■ Use it where the signal cable does not touch or run parallel to the power line.
Also keep the signal cable away from any strong magnetic field generating
devices such as a motor or a power transformer.
■ During operation, avoid direct sunlight, high temperature, high humidity, or
places where dew condensation may occur such as rapid temperature or humidity
changes.
7.2 Wire Connection
This is a strain indicator for measuring the strain gauge type sensor gauge output
such as a load‑cell. For the strain measurement of an individual strain gauge,
use the BX‑100 strain gauge bridge box with the 1‑gauge or the 2‑gauge method.
7.3 Measurement
7.3.1 Strain Measurement
Connect a sensor to ⑥ INPUT in the rear panel, switch ④ INDICATION to STRAIN,
and ⑤ ZERO SET to OFF, then turn on the power. It is now ready in strain display
mode.
■ Zero Adjustment
Switch ⑤ ZERO SET in the rear panel to ON, press ⑨ (↓Key) ZERO RESET while
holding ⑬ SELECT button in the operation panel, and the display changes to
zero and it is now ready for zero adjustment. The range of zero adjustment
is ±10000×10−６ strain.
When it exceeds the range, the LCD displays [OFF OVER] and you will not be
able to return to the previous display for the zero adjustment.
When you wish to make a zero adjustment, set it to within ±10000×10−６
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strain by referencing the material in the back of this manual, then make a
zero adjustment.
■ Peak Hold Display
Press ⑫ PEAK HOLD button and the display shows [P] then the peak hold
operation starts. It continues until ⑫ PEAK HOLD button is pressed again.
7.3.2 User Unit Display Measurement
Connect ⑥ INPUT in the rear panel to a sensor, switch ④ INDICATION to USER,
and the display mode becomes a user display mode. The displayed value is computed
according to the user defined physical quantity (Kg, etc.) vs. sensor
sensitivity (mV/V) setting.
■ Sensor Sensitivity (mV/V and rated capacity) setting procedure
Press ⑪ ENTER while holding ⑬ SELECT in the operation panel, and the
display changes to C 00.000. Move to a desired digit using ⑧(→) or ⑩(←)
key, and select values using ⑦(↑) or ⑨(↓) key. Once a desired value is
set, press ⑪ ENTER. Then the rated capacity is displayed as G 00000. Move
to a desired digit using ⑧(→) or ⑩(←) key, and select values using ⑦
(↑) or ⑨(↓) key. (The rated capacity is a value found in the sensors
data sheet)
To change the decimal point position, move the cursor to a desired decimal
point position using ⑧(→) or ⑩(←) key, press ⑪ ENTER key, and the
character display becomes reversed. Move to a desired position using ⑧(→)
or ⑩(←) key, and press ⑪ ENTER. When all of the settings are finished,
press ⑪ ENTER one more time.
■ How to set the number of digits below decimal point in the measurement screen
The number of display digits below decimal point can be selected during
measurement. Press ⑧(→）or ⑩(←) key while holding ⑬ SELECT, and the
character at the cursor becomes inverted. Move to a desired digit using ⑧
(→) or ⑩(←) key, then press ⑪ENTER. Note that the maximum value to be
displayed is 9999 including the number after the decimal point.
■ Zero adjustment and peak hold display
The operation and function are the same as strain measurement. Switch ⑤ ZERO
SET in the rear panel to "ON". The zero adjustment is engaged by pressing
⑨(↓key) ZERO RESET while holding ⑬ SELECT button. The adjustable range
is ±10000×10−６ in strain quantity.
■ Display accuracy
The numerical value that is smaller than 1×10−６ strain in input
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strain quantity converted value can be displayed by moving the decimal
point. However, not all digits in display are guaranteed due to the
stability or accuracy, etc.
■ Initial Setting
Turn ② POWER on while holding both ⑬ SELECT button and ⑦ ↑ key
simultaneously, and keep holding both keys until the measurement value
appears. The unit is then initialized to the user unit of 1.000ｍV/V and the
displayed value of 2000.
7.4 Alarm Display
Alarm during measurement
■ OVER
Description：Displayed value exceeds the limit of 9999
Countermeasure：If in user unit mode, adjust the maximum digits or the
coefficient so that the expected maximum measurement value fits in 9999.
■ OFF OVER
Description：Input value exceeds the offset adjustable range.
Countermeasure：Refer to Zero Adjustment in the back of the material and
adjust the bridge balance to the level smaller than ±10000×10−６ strain.
■ AD +OVER/‑OVER
Description：The input level from sensor exceeds ±20000×10−６ strain.
Countermeasure：Open wire or disconnection of sensor or sensor cable is
considered. Make a correction.
Power on error message
The following alarm indicates errors from EEPROM rewrite times (10７times),
data storage life (10 years), setting, internal process. PRM ERR is an error
during setting and the others do not occur during normal operation. In case
of an error, turn off the power then turn it back on. If the error continues,
contact our sales department or distributor.
1. RECOVER ：Invalid user unit coefficient. (Unit reboots as result)
Power has been disturbed during data saving to ROM.
2. PRM ERR ：Invalid conversion coefficient
One or both terms in sensitivity (mV/V) are zero. (Enter a
valid value)
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3. AD ERR ：Communication with internal A/D failed. (Reboot the unit)
4. CAL ERR ：Invalid written data in ROM.
5. ROM WERR ：ROM write failure.
6. ROM RERR ：ROM read failure.
7. ROM EERR ：ROM erase failure.
8. SYS ERR ：Internal process error.
9. BAD CALD ：Calibration failure due to the abnormal ROM data.
8. Miscellaneous Materials
ZERO adjustment of strain gauge sensor
The sensor generates a slight voltage even if no load is applied.
When there is a tare weight such as a weight measuring device, the voltage equivalent
to the tare weight is generated. The zero adjustment range of TD‑35 is ±5mV/V (±
10000×10−６ strain). In case it does not meet the zero adjustment within this range,
as shown in the figure below, the zero point shift resister that corresponds to the
sensor output can be externally connected so that the zero point is shifted
electrically.
RZ is connected to only one side depending on the direction of the sensor. The direction
of zero shift changes depending on the connection either between ‑SIG(B) and +EXC(A)
or ‑SIG(B) and ‑EXC(C). The RZ is to be connected between ‑SIG and +EXC(B‑A) when the
imbalance needs to be canceled such as in subtracting tare weight of measuring weight
devices (tare weight appears as positive in sensor output).
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The resister to be used (RZ) directly influences the zero drift characteristic of the
sensor, therefore use the resister that has an excellent temperature coefficient.
(25ppm/℃ or less recommended) This method can be used for sensitivity calibration
when the indicator is replaced.
In general, the initial calibration is done by combining with a sensor and an actual
applied load. However, when a re‑calibration is not feasible, it can be done with the
following substitution method without using an actual load.
After initial calibration, connect an appropriate resister (RZ) to one side of the
bridge and record the displayed value, then remove the resister. When the indicator
is replaced for a reason of servicing or so forth, connect the same resister used above,
adjust ZERO balance, and make a sensitivity adjustment so that the reading value becomes
the same as the previously recorded value.
The table in next page shows the resister values and the shift amount when a resister
is connected to one side of the bridge circuits having two different resister values,
350Ω and 120Ω. These resister values are calculated amounts and they may be off due
to the errors in the input and the output resistance of the sensor. Use these values
only as an estimate or guideline.
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Added resister value versus input conversion strain of the bridge circuit with 350
Ω and 120Ω resistance.
List of switch settings on measurement items
17

9. External View
４０ １.６
１００
１５０
１１
MADE IN JAPAN NO.
SERIAL
MODEL NO.
TEAC INSTRUMENTS CORP
DIGITAL STRAIN INDICATOR
5‑12V 0.3‑0.14A
ＴＤ−３５
18