Quick Start Guide
T71 Indicators
ASSEMBLY
Both the T71P and T71XW connect to a scale base through a Load Cell Cable that connects to
the Indicator’s Main Printed Circuit Board (PCB). CAUTION: REMOVE ALL POWER
CONNECTIONS TO THE INDICATOR BEFORE MAKING INTERNAL CONNECTIONS.
The process of opening the Housing varies slightly for each model:
T71P:
1. Remove the four Phillips head screws
from the rear housing.
2. Open the housing; disconnect the
ribbon cable from the top of the PCB.
T71XW:
1. Remove the four hex head screws from
the rear housing.
2. Open the housing by carefully pulling
the top of the front housing forward.
The T71’s Main PCB, with connectors, jumpers, terminals and switches is shown below.
Power Supply
connector
Scale 1 Load Cell
Terminal Block J4
Real Time
Clock Battery
Scale 1 Sense
Jumper W2
Scale 2 Sense
Jumper W3
Scale 2 Load
Cell Terminal
Block J7
Scale 2 Sense
Jumper W4
COM2 Connector
J8 (Optional:
RS232 or
RS422/485)
Battery
connector
(T71P only)
Rechargeable
Battery
Connection J3
(T71P opposite side)
Alibi Option
PCB Connection
Security Switch
SW1
Scale 1 Load Cell
Connector J14
(T71P only)
Scale 1 Sense
Jumper W1
RS232 Terminal J7
(T71XW only)
RS232 Connector
(T71P only)
External Input
Terminal Block J9
Printed Circuit Board (PCB), T71 Indicator.
Connecting the Scale Base’s Load Cell
The T71P has a circular connector jack on its Bottom Housing. The white plastic six-wire plug
connects to the Scale 1 Load Cell Connector J14.
Attach a base without a circular connector to one of the Load Cell Terminal Blocks on the Main
PCB. Pass the load cell cable through a Cable Gland and attach it to Terminal Block J4 or
Terminal Block J7. Tighten the Cable Gland to secure the cable and maintain a tight seal.
Jumper Connections
When a 4-wire load cell is attached to terminal block J4, short jumpers W1 and W2.
When a 6-wire load cell is attached to terminal block J4, open jumpers W1 and W2.
When a 4-wire load cell is attached to terminal block J7, short jumpers W3 and W4.
When a 6-wire load cell is attached to terminal block J7, remove jumpers W3 and W4.
Pin
+EXC
+SIG -SIG -EXC
+SENS GND -SENS
Load Cell wiring.
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1
2
3
4
5
6
7
Connection
+Excitation
+Sense
+Signal
GND
–Signal
–Sense
–Excitation
i
Open/shorted jumpers.
T71 Indicators Quick Start Guide
T71 Indicators
Quick Start Guide
SAFETY PRECAUTIONS
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For safe and dependable operation of this product, please comply with the following
safety precautions:
Verify that the input voltage printed on the power Adapter and the plug type matches
the local power supply.
Make sure that the power cord does not pose an obstacle or tripping hazard.
Disconnect the product from the power supply when cleaning.
Do not operate this product in hazardous or unstable environments.
Do not drop loads on the pan.
Use only approved accessories and peripherals, as available.
Operate the product only under ambient conditions specified in the Instruction Manual.
Service should be performed by authorized personnel only.
Capacity label
window
CONTROLS
7-segment, 6-digit
Display
Net symbol
Scale symbol
Range symbol
Center of Zero
Kilogram, Gram,
Percent, Pound, Ounce,
Pound:Ounce, Tonne,
Pieces symbols
Battery charge
symbol
Negative symbol
Stability symbol
Preset Tare, Tare,
Bruto, Gross,
Memory symbols
Dynamic symbol
Control Buttons
Button
Primary
Function
(Short Press)
ON/ZERO
Turns the Indicator on
If on, sets zero.
PRINT
Sends current value to COM
port if AUTOPRINT is Off.
FUNCTION
Initiates a mode.
Displays reference data.
TARE
Performs tare
operation.
LIBRARY
Display library data.
Secondary
Function
(Long Press)
Off
Turns the Indicator
off.
Units
Changes the weighing unit.
Mode
Change mode.
Press and hold: scroll
through modes.
Menu
Enter the User
menu.
Edit
Edit current library
record.
Menu
Function
(Short Press)
Yes
Accepts the current
menu or setting.
No
Advances to next item.
Rejects current setting;
advances to the next.
Increments the value.
Back
Moves back
to previous item.
Decrements the value.
Exit
Exits the User
menu.
Aborts a calibration
in progress.
Library
Function
(Short Press)
Yes
Accepts current
setting.
No
Advances to next.
Increments displayed value.
Back
Moves back to previous.
Decrements value.
Exit
Exits the library.
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Quick Start Guide
T71 Indicators
FUNCTIONS OF THE DISPLAY KEYPAD
Button
Primary
Function
(Short Press)
Secondary
Function
(Long Press)
1
2ABC through 9WXYZ
._-
0
CLR
Enter 1 on
the display.
Enter alphanumeric values on the
display using the multi-tap text
entry method.
Enter decimal point,
space or dash on
display.
Enter 0 on
the display.
Clear last
character from the
display
1s2
Info
+/-
Change display
between Scale 1
and Scale 2.
Show accumulation
statistics on display.
Change polarity of
displayed value.
OPERATION
On: Press ON. Indicator runs a display test, shows a series of
informational displays, and enters active weighing mode.
Off: Press and hold Off until OFF appears.
Press ZERO to zero the weight display. Scale must be stable.
Scale zeros automatically at Power On.
Manual Tare: If weighing an item in a container, place empty container on
the scale. Before taring, container’s weight is shown (example 0.5 kg).
Press TARE. Display shows zero.
(If container is removed, display shows container’s weight as negative.)
To clear the Tare value, empty the scale and press TARE.
The display shows gross weight (zero if scale is empty).
Weighing: Place the item to be weighed on the scale.
(Sample shown: 1.5 kg, Gross weight.)
Verify the indicator: place a known mass on the scale and check if the reading is accurate.
If not, calibrate, using the Calibration Guide.
ADDITIONAL OPERATIONS
Changing Units of Measure: Press and hold Units until desired unit
appears. Only measuring units enabled in the Unit Menu are displayed.
Application Modes: Press and hold the Mode button until the desired
application mode appears. WEIGH is default mode.
To have other modes accessible through Mode button, first turn
them On in the MODE menu. (See back page.)
When modes are On, press Mode to choose from available options.
For details on various application modes, see Instruction Manual.
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iii
Weigh
Count
Percent
Dynamic
Checkweigh
Off, On
Off, On
Off, On
Off, Manual
Off, On
T71 Indicators Quick Start Guide
T71 Indicators
Quick Start Guide
MENU NAVIGATION
Press and hold the Menu button until MENU appears on the display.
Use Yes, No, Back, and Exit to navigate in Menu Mode:
– Yes Allows entry / Accepts displayed setting and advances to next menu item.
– No Skips displayed menu / Rejects setting or item, advances to next available item.
– Back Moves backwards through menus.
– Exit Exits directly to active weighing mode.
MENU STRUCTURE (For more details, see Instruction Manual.)
CALIBRATION
SETUP
READOUT
MODE
UNIT
GMP
PRINT-1
Zero1
Zero2
Span1
Span2
3pt Linear1
3pt Linear2
5pt Linear1
5pt Linear2
CAL Test1
CAL Test2
GEO
Reset
Dual Scale
Range1
Range2
Capacity1
Capacity2
Graduation1
Graduation2
Power on Unit
Zero Range
Auto Tare
Accumulation
Retain Zero
Legal For Trade
Beeper Volume
Beeper Signal
Key Beep
Library
Alibi
End Setup
Reset
Language
Stable Range
Filter
Auto Zero
Backlight
Auto Off
Gross Indicator
End Readout
Reset
Weigh
Count
Percent
Dynamic
Check Weigh
End Mode
Reset
Kilogram
Pound
Gram
Ounce
Pound Ounce
Tonne
Custom
End Unit
Reset
Date
Time
User ID
Project ID
Scale ID
End GMP
Reset
Stable Print
Auto Print
Content
Layout
End Print-1
PRINT-2
COM1
COM2
I-O
LOCK MENU
LOCK KEY
END
Reset
Stable Print
Auto Print
Content
Layout
End Print-2
Reset
Baud
Parity
Stop
Handshake
Alt. Command
End COM1
Reset
Baud
Parity
Stop
Address
Handshake
Alt. Command
End COM2
Reset
Ext. Input
Input Beep
Relay Output
Stable
End I-O
Reset
Lock Cal
Lock Setup
Lock Readout
Lock Mode
Lock Unit
Lock Print1
Lock Print2
Lock COM1
Lock COM2
Lock GMP
Lock I-O
End Lock Menu
Reset
Lock All
Lock Off
Lock Zero
Lock Print
Lock Unit
Lock Function
Lock Mode
Lock Tare
Lock Menu
Lock Library
Lock Info
End Lock Key
Note: For Relay Option and RS 485/422 Option Kits, see instruction manuals at www.Ohaus.com.
*80253036*
P/N 80253036
T71 Indicators Quick Start Guide
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