Omni Instruments TR150 User manual

TR150
Portable Battery
Powered Indicator
Instruction Manual
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1
CONTENTS
INTRODUCTION .................................................................................................................2
USER OPERATION .........................................................................................................2
Electrical Connection Information.....................................................................................3
Sensor Connections .....................................................................................................3
RS232 Port Connections ..............................................................................................3
Internal Connections.....................................................................................................3
MENU STRUCTURE........................................................................................................5
CONFIGURATION MENU................................................................................................7
CALIBRATION MENU......................................................................................................9
Operation Features ........................................................................................................10
Normal Display Operation...........................................................................................10
Switching the TR150 On/Off .......................................................................................10
RANGE Button ...........................................................................................................10
HOLD Button ..............................................................................................................11
GROSS/NET Button ...................................................................................................11
SHUNT CAL Button....................................................................................................11
PEAK Button...............................................................................................................11
TROUGH Button.........................................................................................................11
CONFIGURATION MENU Parameters ..........................................................................12
CALIBRATION MENU Parameters ................................................................................14
Calibration Procedures ...............................................................................................15
Specifications .................................................................................................................17
Mechanical Dimensions .................................................................................................17
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2
INTRODUCTION
The TR150 Portable Strain Display Load Cell/Force transducer readout is a
microprocessor based portable instrument designed to interface with any full bridge sensor
with an output sensitivity of up to 50mV/V. Bridge resistances from 85Ωupwards can be
used with the TR150.
Configuration and calibration of the TR150 is achieved using the front panel push buttons
to navigate through a very simple menu structure.
User functions available on the TR150 include:-
•Range Selection
•Display Hold/Freeze
•Gross/Net indication selection
•Peak Hold selection
•Trough Hold selection
•Shunt Cal check
The TR150 is powered by two internal non-rechargeable AA alkaline batteries.
There is an option to have rechargeable alkaline batteries, which can be charged without
the need for removing them from the TR150.
USER OPERATION
Important Note
The unit is supplied calibrated to a particular load cell. All user functions are available via
the front keypad. Do not attempt to re-calibrate the TR150, unless you are authorised and
have the equipment available to do so.
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3
Electrical Connection Information
Sensor Connections
The standard sensor connection is a 5 pin 723 series Binder connector. The sensor
connector is also used as a charging socket when the re-chargeable alkaline battery
option has been ordered. The wiring of the socket is detailed below:-
PIN 1 +ve Excitation
PIN 2 -ve Excitation & -ve Charge Input
PIN 3 +ve Signal
PIN 4 -ve Signal
PIN 5 +ve Charge Input
RS232 Port Connections
If the TR150 has been ordered with the optional RS232 output, then this will be available
via an 8 pin 723 series Binder connector. The wiring for this is detailed below:-
PIN 1 Tx
PIN 2 Rx
PIN 3 Gnd
Internal Connections
It may be necessary from time to time to know what the internal connections are. For
example, if you disturb some of the connections whilst trying to insert the range legends,
or if you need to change the internal shunt calibration resistor. These are shown below for
reference only:-

4
There are six push buttons on the front panel of the TR150, which are available for use in
normal operation. Each of these is described below:-
Front Panel
Button Function of Button in Normal Operation Mode
To switch the TR150 ON or OFF press and hold the button.
The RANGE button allows the user to toggle between two
independent scales. The range that has been selected is
highlighted by an annunciator.
The HOLD button allows you to hold/freeze the current display
value when the button is pressed. Pressing the HOLD button
again releases the display. The HOLD annunciator is illuminated
when in the HOLD mode, and the display will flash to warn that
the user is not viewing instantaneous display values.
The GROSS/NET button, when pressed, allows the user to
toggle between Gross or Net display values. This can be useful
in many applications where it is necessary to display the change
in value from a certain part of the measurement range. When in
NET mode the NET annunciator is lit. When in GROSS mode,
the NET annunciator is not lit.
The SHUNT CAL button can be pressed by the user at any point
in time. The standard unit shunts a 100kresistor across the
negative excitation and negative signal connections. If this is
performed at the end of the calibration procedure, then a figure
can be noted so the user can check calibration accuracy or
connection integrity. The button has to be held down to operate.
When held down the SHUNT CAL annunciator is lit and the
display will flash to warn that the user is not viewing
instantaneous display values.
When the PEAK button is pressed, the display will show the last
Peak reading. To reset the Peak reading, press the PEAK and
TROUGH buttons simultaneously. When in PEAK mode, the
PEAK annunciator will be lit and the display will flash to warn
that the user is not viewing instantaneous display values. To turn
off Peak mode, press the PEAK button again.
When the TROUGH button is pressed, the display will show the
last Trough reading. To reset the Trough reading, press the
PEAK and TROUGH buttons simultaneously. When in TROUGH
mode, the TROUGH annunciator will be lit and the display will
flash to warn that the user is not viewing instantaneous display
values. To turn off Trough mode, press the TROUGH button
again.
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5
MENU STRUCTURE
The TR150 has two menus, details of which are outlined below:-
A CONFIGURATION MENU enables the user to tailor the operation to meet a specific
application requirement. The values selected in the CONFIGURATION MENU are
completely independent for each range.
SEt ZErO 0000000
SEt rAtE
SEt OUEr
SEt OPEr
AutO OFF
rS232
25? 10? 3? 1? 0.5?
0000000
PSAVE?
00
EnAbLEd?
RETURN TO
NORMAL DISPLAY
MODE
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6
A CALIBRATION MENU is used to calibrate each of the two ranges with independent scales, as well as setting the display resolution for
each range.
SEnS 5.0
SEt rES
CALibrAt LiVE?
RETURN TO
NORMAL DISPLAY
MODE
0000.000
uSE SC? APPLY LO dISP LO 0000000 APPLY HI dISP HI 0000000 donE
APPLY LO dISP LO 0000000 dISP HI 0000000 donE
tAbLE? InPut LO 0000000 dISP LO 0000000 InPut HI 0000000 dISP HI 0000000 donE
CAL VAL? SEt 9Ain 0000000 SEt OFFS donE
0000000
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7
CONFIGURATION MENU
To enter the CONFIGURATION MENU, press and hold
and buttons for 3 seconds.
Parameter Set-up Information
SEt ZEro
PRESS TO SKIP TO NEXT MENU ITEM
PRESS TO SET A NEW SYSTEM ZERO
This allows the user to introduce a fixed offset to the display value. The
GROSS and NET values are then displayed with this offset taken into account.
Values between -9999999 and +9999999 can be entered, using the and
buttons to select a digit and the and buttons to increment or
decrement the digits. Press to accept the value and move onto the next
parameter.
SEt rAtE
PRESS TO SKIP TO NEXT MENU ITEM
PRESS TO CHANGE THE UPDATE RATE
This allows the user to set the display update rate. The options available are
the update rates of the display in Hz. Please note that the 25Hz update is only
available in PEAK or TROUGH mode.
When you choose to change the update rate, you will be prompted whether
you want to select 25Hz. If you do not, press . You will then be prompted to
select any of the other values which, in order, are 10Hz, 3Hz, 1Hz, 0.5Hz. To
set the update rate for the value you want, press .
SEt
OUEr
PRESS TO SKIP TO NEXT MENU ITEM
PRESS TO SET OVERLOAD ALARM
This allows the setting of a visual overload. The value entered is the display
value at which the TR150 flashes OUErLOAd.
Values between -9999999 and +9999999 can be entered, using the and
buttons to select a digit and the and buttons to increment or
decrement the digits. Press to accept the value and move onto the next
parameter.
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8
Parameter Set-up Information
SEt
OPEr
PRESS TO SKIP TO NEXT MENU ITEM
PRESS TO SELECT OPERATION MODE
This allows the enabling or disabling of the power save mode, which updates at
1 reading per second and pulses the sensor excitation. This results in a lower
accuracy (1 digit in 10,000).
To enable press .
To disable press
AUtO
OFF
PRESS TO SKIP TO NEXT MENU ITEM
PRESS TO SET AUTO POWER OFF
This enables the setting of an auto power off value. The value entered is in
minutes. If no front panel buttons are pressed for the time set here, then the
indicator will automatically power off to conserve battery life.
Values between 05 and 99 can be entered (00 leaves the TR150 permanently
powered), using the and buttons to select a digit and the and
buttons to increment or decrement the digits. Press to accept the value and
move onto the next parameter.
rS232
PRESS TO SKIP THIS PARAMETER AND EXIT MENU
PRESS TO ENABLE THE RS232 OUTPUT
This feature allows you to enable or disable the RS232 output. Further details
of the RS232 format are provided on page 13 of this manual. The RS232
output is an option that has to be ordered with the TR150. To conserve battery
life, it is suggested that the RS232 output is disabled when it is not required.
To enable press .
To disable press
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9
CALIBRATION MENU
To enter the CALIBRATION MENU, press and hold
and buttons for 5 seconds.
Parameter Set-up Information
SEnS 5.0
PRESS TO SKIP TO NEXT MENU ITEM
PRESS TO CHANGE SENSOR INPUT SENSITIVITY
This allows the calibration engineer to change the sensitivity range of the
TR150 when connecting to sensors with an output of greater than 5mV/V. The
TR150 is factory set for 5mV/V. To ensure the unit is set to 5mV/V press .
To select 50mV/V, you need to power down the unit and access the internal
circuit board. Move link LK1 and place it onto JP1. Power on the TR150 and
return to this point of the calibration menu. You will notice that the menu
parameter has changed to SEnS 50.0. Press to change the sensitivity to
50mV/V and move on to the next parameter.
SEt rES
PRESS TO SKIP TO NEXT MENU ITEM
PRESS TO THE SET THE DISPLAY RESOLUTION
This parameter sets the decimal point position for the display and the
resolution, i.e. a value of 000.005 would display the reading to 3 decimal
places and the readings will change in steps of 0.005.
The decimal point position is moved one place to the right each time you press
the and together.
Any value can be entered for the resolution, using the and buttons to
select a digit and the and buttons to increment or decrement the digits.
Press to accept the value and move onto the next parameter.
To save the settings and move on to the next parameter press .
CALibrAt
PRESS TO SKIP THIS PARAMETER AND EXIT MENU
PRESS TO THE ENTER THE CALIBRATION ROUTINE
If you have chosen to enter the calibration routine, you will be prompted
whether you want to select LiVE. If you do not, press ; otherwise press .
You will then be prompted to select either of the other calibration methods
which, in order, are tAbLE and CAL VAL . To select any of the calibration
methods, press ; otherwise press .
For more detailed calibration information, please refer to the calibration section
of the manual.
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