Interface 9320 Battery Powered Portable Load Cell Indicator User Manual
- June 6, 2024
- Interface
Table of Contents
9320 Battery Powered Portable Load Cell Indicator
User Manual
9320 Battery Powered Portable Load Cell Indicator
9320 User Manual
Contents
What is TEDS?
1
Basic concept
1
How it works
1
Advantages
2
Introduction
3
User Operation
3
Electrical Connection Information
4
Sensor Connections
4
RS232 Port Connections
4
Internal Connections
4
Menu Structure
6
millivolt per Volt Calibration Menu Structure
7
Configuration Menu
8
Calibration Menu
10
Millivolt per Volt Calibration Menu
12
Operation Features
13
Normal Display Operation
13
Switching the 9320 On/Off
13
RANGE Button
13
HOLD Button
14
GROSS/NET Button
14
SHUNT CAL Button
14
PEAK Button
14
TROUGH Button
14
Configuration Menu Parameters
15
Calibration Menu Parameters
17
Calibration Procedures
18
Millivolt per Volt Calibration Procedure
20
Specifications
21
Mechanical Dimensions
21
Warranty
22
What is TEDS?
Plug and play sensor hardware and software make configuring a smart TEDS
sensor as easy as plugging a mouse into a PC. The technology has greatly
improved efficiency and productivity by completely eliminating manual sensor
configuration.
Basic concept
TEDS is at the heart of the new universally accepted IEEE 1451.4 standard for
delivering Plug and Play capabilities to analogue measurement and test
instruments. In essence, information in a Transducer Electronic Data Sheet
provides interfacing devices with the critical sensor calibration information
in order to perform accurate and precise measurements every time.
TEDS works in a similar way in which USB computer peripherals immediately work
as they are connected. TEDS enabled equipment maybe swapped and changed
without recalibration, saving time and money.
TEDS holds information such as a sensor manufacturer, model and serial
numbers, and more importantly all the calibration settings determined by the
manufacturer.
Sm a rt TEDS Se nso r
A na lo g Sig na l
TRANSDUC ER
TRANSDUC ER ELEC TRO NIC DATA SHEET (TEDS)
MIXED-M O DE INTERFAC E (A NALO G UE A ND DIG ITAL)
Dig ita l TEDS
· SENSO R M ANUFA C TURER · M O DEL NUM BER · SERIAL NUM BER · M EASUREM ENT
RANG E · C ALIBRATIO N INFO RM ATIO N · USER INFO RM A TIO N
How it works
Plug and play is a data acquisition technology that can simplify the
configuration of automated measuring systems by making a sensor’s unique
identification data available electronically. As implemented according to IEEE
P1451.4, data in the form of a transducer electronic data sheet (TEDS) is
burned on an electrically erasable programmable read-only memory (EEPROM) chip
located on the sensor, so when a properly adapted signal conditioner
interrogates the sensor, it can interpret the self identification data. This
technology provides a great benefit by eliminating the need for paper
calibration sheets. In addition, it can simplify labeling and cabling
problems, as well as inventory control issues; by letting you burn location
data onto the chip when installing a sensor. And because all sensors produced
according to the standard will carry the same basic identically formatted
self-identification information, you will be able to mix and match sensors and
applicable signal conditioners across manufacturers.
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Advantages
Plug and play sensors are revolutionizing measurement and automation. With
Transducer Electronic Data Sheets (TEDS), your data acquisition system can
detect and automatically configure sensors. This technology provides:
Reduced configuration time by eliminating manual data entry
Better sensor tracking by storing data sheets electronically
Improved accuracy by providing detailed calibration information
Simplified asset management by eliminating paper data sheets
Reliable sensor location by identifying individual sensors electronically
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Introduction
The 9320 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 85 upwards can be used with the 9320.
Configuration and calibration of the 9320 is achieved using the front panel
push buttons to navigate through a very simple menu structure.
User functions available on the 9320 include:-
Range Selection Display Hold/Freeze Gross/Net indication selection Peak Hold
selection Trough Hold selection Shunt Cal check
The 9320 is powered by two internal non-rechargeable AA alkaline batteries.
User Operation
Full 7 digit LCD display
Push Buttons used for normal operation and for configuration
Operation Annunciators Unit Labels
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Electrical Connection Information
Sensor Connections
The standard sensor connection is a 5 pin 723 series Binder connector. The
wiring for this is detailed below:-
PIN 1 PIN 2 PIN 3 PIN 4 PIN 5
+ve Excitation -ve Excitation & TEDS Common +ve Signal -ve Signal TEDS
RS232 Port Connections
If the 9320 has been ordered with the optional RS232 output, then this will be
available via a 8 pin 723 series Binder connector. The wiring for this is as
detailed below:-
PIN 1
Tx
PIN 2
Rx
PIN 3
Gnd
Note: PINS 4 to 8 not connected
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:-
J9 TEDs Position
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Shunt Calibration Resistor
Sensor Connections RS232 option
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There are six push buttons on the front panel of the 9320, 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 9320 ON or OFF press and hold the button
The RANGE button allows the user to toggle between two independent scales. An
annunciator highlights the range that has been selected.
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 alarm further that the user is not viewing instantaneous display
values. The GROSS/NET button, when pressed, allows the user to toggle between
displaying the Gross or Net display values. This can be useful in many
applications where it is necessary to display the change in display 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 allows the user to press this 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 alarm
further 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 readings press the PEAK and TROUGH buttons simultaneously. When in
PEAK mode the PEAK annunciator will be lit and the display will flash, to
alarm further that the user is not viewing instantaneous display values. To
turn off Peak mode press the PEAK button. When the TROUGH button is pressed
the display will show the last Trough reading. To reset the Trough readings
press the TROUGH and PEAK buttons simultaneously. When in TROUGH mode the
TROUGH annunciator will be lit and the display will flash, to alarm further
that the user is not viewing instantaneous display values. To turn off the
Trough mode press the TROUGH button
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Menu Structure
The 9320 has two menus, details of which are outlined below:-
A CONFIGURATION MENU, which 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
25?
10?
3?
1?
0.5?
SEt OUEr
0000000
SEt OPEr
PSAVE?
AutO OFF
00
rS232
EnAbLEd?
RETURN TO NORMAL DISPLAY
MODE
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A Calibration Menu, which 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
0000.000
- CALibrAt
LiVE? tAbLE?
uSE SC?
APPLY LO
dISP LO
0000000
APPLY HI
dISP HI
0000000
APPLY LO
dISP LO
0000000
dISP HI
0000000
donE
InPut LO
0000000
dISP LO
0000000
InPut HI
0000000
dISP HI
donE 0000000
donE
tedS
CAL VAL? EnAbLEd?
SEt 9Ain
0000000
SEt OFFS
0000000
donE
- Note:Only when TEDS is disabled
RETURN TO NORMAL DISPLAY
MODE
Millivolt per Volt Calibration Menu Structure
To access the millivolt CALIBRATION MENU, Press and hold
and
for 10 seconds
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Configuration Menu
To enter the CONFIGURATION MENU, press and hold and
buttons for 3 seconds
Parameter
Set-up Information
Press Press
To skip to next menu item 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.
SEt ZEro
Values between -9999999 and +9999999 can be entered, using the and arrows to select a digit and the and arrows to increment or decrement the digits. Press to accept the value and move onto the next parameter.
Set Zero may also be set by pressing
and
at the same time.
Press Press
To skip to next menu item To change the update rate
SEt rAtE
This allows the user to set the display update rate, the options available is the update rate 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 Press
To skip to next menu item To set overload alarm
This allows the setting of a visual overload. The value entered is the display value at which the 9320 displays OUErLOAd.
Values between -9999999 and +9999999 can be entered, using the and arrows to select a digit and the and arrows to increment or decrement the digits. Press to accept the value and move onto the next parameter.
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Parameter
SEt OPEr
Set-up Information
Press Press
To skip to next menu item To select operation mode
This allows the enabling or disabling of the power save mode, which updates at
1 update per
second and pulses the sensor excitation. This results in a lower accuracy (1
part in 20,000). Minimum bridge resistance is 350 for power save mode.
To enable press
To disable press
AUtO OFF
Press Press
To skip to next menu item 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 (between 00 and 04 leaves the 9320
permanently powered), using the and arrows to select a digit and the and
arrows to increment or decrement the digits. Press to accept the value and
move onto the next parameter.
rS232
Press Press
To skip this parameter and exit menu To enable the RS232 output
This feature enables you to enable or disable the RS232 output. Further
details of the RS232
format are provided further into this manual. The RS232 output is an option
that has to be ordered with the 9320. 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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Calibration Menu
To enter the Calibration Menu, press and hold
and
buttons for 5 seconds
Parameter Set-up Information
Press Press
To skip to next menu item To change sensor input sensitivity
SEnS 5.0
This allows the calibration engineer to change the sensitivity range of the
9320, when connecting to sensors with a sensitivity of greater than 5mV/V. The
9320 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 9320 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.
Press Press
to skip to next menu item 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.
SEt rES 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 arrows to select a digit
and the and arrows to increment or decrement the digits. Press value and move onto the next parameter.
to accept the
To save the settings and move on to the next parameter press
THIS MENU IS DISABLED WHEN TEDS IS ENABLED
Press Press
to skip to next menu item. to the enter the calibration routine
CALibrAt
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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tedS
ENABLING TEDS DISABLES CALIBRATE MENU
Press Press
to skip this parameter and exit menu to enable or disable TEDS.
If you have chosen to enter the TEDS calibration, EnAbLEd? appears.
If you have chosen to enter the TEDS you will be prompted whether you want to select
EnAbLEd? if you do not press otherwise press ,
flashing indicators will appear.
. If you have selected enabled, two
For more detailed TEDS calibration information, please refer to the TEDS section of the manual.
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Millivolt per Volt Calibration Menu
To enter the MilliVolt per Volt Calibration Menu, press and hold
and
buttons for 10 seconds
Parameter Set-up Information
Press Press
To skip to next menu item To change the 5mV/V gain.
5.0 gAIn Here the factory gain calibration can be changed to a measured value (see Milli-Volt Calibration Procedure back end of manual).
Once the derived value has been entered Press to confirm.
Press Press
to skip to next menu item to change the 5mV/V offset.
5.0 OFFS Here the factory offset value can be changed to a measured value (see Milli-Volt Calibration Procedure back end of manual).
Once the derived value has been entered Press to confirm.
THIS CAN ONLY BE SET WHEN USING 50mV/V RANGE
50 gAIn
Press Press
To skip to next menu item To change the 50mV/V gain.
Here the factory gain calibration can be changed to a measured value (see Milli-Volt Calibration Procedure back end of manual).
Once the derived value has been entered Press to confirm.
THIS CAN ONLY BE SET WHEN USING 50mV/V RANGE
50 OFFS
Press Press
to skip to next menu item to change the 5mV/V offset.
Here the factory offset value can be changed to a measured value (see Milli- Volt Calibration Procedure back end of manual).
Once the derived value has been entered Press to confirm.
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Operation Features
Normal Display Operation
The 9320 has a full 7 digit display, which can be scaled using the calibration
menu to suit the application it is to be used in. The display can display the
instantaneous, peak or trough values. It is also possible to hold the display
value (this only operates when not in peak or trough mode).
The display update rate, decimal point position and resolution can be set to
suit.
The 9320 has two independent ranges. All values set in one range are totally
independent from the other.
Switching the 9320 On/Off
The 9320 is switched ON or OFF by pressing and holding down the
button for 3 seconds.
It is also possible to set an Auto-off value in the configuration menu, so that the 9320 automatically switches itself off after a preset time, if there is no keyboard activity.
RANGE Button
The range feature allows for the setting of two totally independent setup
ranges to be selected, if required. To switch between ranges simply press the
range button. If TEDS has been enabled then only 1 range is permissible.
When you enter either the calibration menu or configuration menu, the
parameters you will be setting are those for the range you have selected. An
annunciator is lit to identify which range has been selected.
The 9320 is supplied with engineering unit legends; these can be slid into a
window, located on the inside of the front panel. These labels then help to
further identify the units being displayed for each range. Please refer to the
photo below:-
Legend labels are inserted both sides
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HOLD Button
The hold button allows the user to freeze the display when it is pressed. When
pressed again the display returns to it’s normal operating mode. When in hold
mode the display will flash and the hold annunciator will be lit, to ensure
that this feature is not accidentally turned on without the user noticing.
The hold feature can not be used when the 9320 is in either peak or trough
hold mode.
GROSS/NET Button
The gross/net button, when pressed, toggles between the gross and net display
values. This enables the user to zero the display (by putting the 9320 into
net mode) and displaying the change in display value from that point.
This is useful for certain weighing applications where a tare weight exists,
which can be removed by putting the 9320 into net mode.
SHUNT CAL Button
The shunt calibration button, when pressed, puts an internal 100k resistor
across the ve excitation and ve signal of the sensor, generating a simulated
output from the sensor, therefore giving a simulated display value. This can
be pressed immediately after the sensor has been calibrated with the 9320 and
noted down for later reference. The value noted can be used to get an idea of
the calibration accuracy at a later date, or for checking the integrity of the
sensor and sensor cabling.
The shunt calibration resistor can be changed to suit specific requirements.
It is suggested that a 15ppm ±0.1% tolerance resistor is used.
PEAK Button
When pressed this button puts the 9320 into peak mode. This will display the
highest display reading and hold it on the display until it is reset or a
higher value is reached. To reset the peak display, press the peak and trough
buttons simultaneously. In peak mode it is possible to capture peaks at a rate
of up to 25Hz. To turn off the peak mode, press the peak button.
TROUGH Button
When pressed this button puts the 9320 into trough mode. This will display the
lowest display reading and hold it on the display until it is reset or a lower
value is reached. To reset the trough display, press the peak and trough
buttons simultaneously. In trough mode it is possible to capture troughs at a
rate of up to 25Hz. To turn off the trough mode, press the peak button.
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Configuration Menu Parameters
SEt ZEro Parameter
The SEt ZEro parameter is meant to be accessible to the user. It allows the
removal of fixed display offset values from the display, so that the GROSS and
NET features can operate from a zero point. This may also be considered as a
manual tare facility. To zero the display, simply enter the value that you
wish to subtract from the display in the SEt Zero parameter. i.e. if the
display reads 000.103 and you wish it to read 000.000, then enter 000.103 in
the SEt ZEro parameter.
Set Zero may also be achieve by pressing Gross/Net and Hold button
simultaneously.
Different values can be set for each RANGE.
SEt rAtE Parameter The SEt rAtE value sets the display update rate. The
options available are 25Hz, 10Hz, 3Hz, 1Hz and 0.5Hz. Different updates rates
can be set for each RANGE.
The 25Hz rate only updates at this rate when in the PEAK or TROUGH mode. When
in normal display mode it has been limited to a 3Hz update, as the digit
fluctuations are impossible to view with the human eye.
The 10Hz, 3Hz, 1Hz and 0.5Hz rates update the display every 100mS, 300mS,
1000mS and 2000mS respectively. The 9320 when it leaves the factory is set at
3Hz.
SEt OVEr Parameter The SEt OVEr parameter allows the user to set a visual
alarm. The value that is entered is the display value that you want the alarm
to activate at. When the alarm is activated the word OVErLOad appears on the
screen. To remove the alarm, the display value must be reduced to a value that
is lower than that set in the SEt OVEr parameter. This can be very useful as a
safety feature, or simply as a quick indication of when a preset level has
been reached.
This value entered can be anywhere over the entire display range, so there are
no limitations. Different values and settings are available for each RANGE.
SEt OPEr Parameter The 9320 has a special power saving mode, which can be
enabled or disabled within this parameter, pressing when asked whether you
wish to select P SAvE? will put the 9320 into power save mode for the RANGE
selected.
Pressing will de-activate the power save facility.
When the power save facility is activated, battery life is conserved by pulsing on the excitation voltage to the sensor. As a result the accuracy is reduced, as is the update rate. When in this mode, the quickest update rate is 3Hz and the accuracy of the display is reduced to 1 digit in 10,000. It is important to note these limitations when deciding whether to use the power save facility. However, it is also possible to set one RANGE with power save activated and the other without.
The benefit is that the battery life, based on a 350 sensor bridge being connected, increases from 45 hours to 450 hours. Power save mode should not be used on sensor bridges of less than 350.
It is also important to remember that when the 9320 is re-calibrated with a sensor, the power save facility will
be automatically turned off. The power save facility will therefore need to be re-activated after calibration has
been completed.
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AUtO OFF Parameter The AUtO OFF parameter is another power saving feature. It
allows for the setting of a time period in minutes, between 05 and 99 (00 de-
activates AUtO OFF). i.e. if this was set to 25, then if the 9320 detects no
keyboard activity for a continuous 25 minute period, then the 9320 will power
down, to conserve power. If keyboard activity is detected at any time during
the 25 minute period, then the time period is restarted.
This can be a useful feature in a site environment, should the 9320 be left
unintentionally powered on.
rS232 Parameter This parameter allows the user to enable the RS232 output form the 9320, by pressing EnAbLEd? On the display, pressing will disable the RS232.
when prompted by
The output format is ASCII. The display value is passed to the RS232 port each time the display updates, with a carriage return and line feed at the end of each data string. The string information is as follows:-
Baud Rate
=
Stop bits
=
Parity
=
Data bits
=
9600 baud 1 None 8
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Calibration Menu Parameters
SEnS 5.0 Parameter The 9320 is factory set to enable calibration with sensors
generating an input signal of 5mV/V or less. In the majority of cases it will
not be necessary to read higher signal levels. If however, a higher
sensitivity sensor is used with the 9320, it will be necessary to gain access
to the internal PCB (you must turn the 9320 off) to move link LK1 to JP1 (see
picture below) to allow the 9320 to accept sensitivities of up to 50mV/V. TEDS
should only be used with 5mV/V as 50mV/V is not factory calibrated.
Once this link has been moved, you will need to go back into the CALIBRATION
MENU. When re entering the menu, you will notice that the parameter SEnS 5.0
has changed to SEnS 50.0 to change the sensitivity to 50mV/V press
, the 9320 will now check the position of the link and change the sensitivity.
It will now be necessary to re-calibrate any sensors that you may previously
have calibrated to this instrument.
Sensitivity link should be in this position for use with sensors, with
sensitivities <+/- 5mV/V
Sensitivity link should be in this position for use with sensors, with
sensitivities >+/-5mV/V
SEt rES Parameter This parameter enables the setting of two features on the 9320. It allows you to set the decimal point position of
the display, by pressing the
and
together, to move the point position (each press moves the decimal
point position, one place to the right). It also allows for the setting of the display resolution or the number of display counts the display changes with an
input change. To change the resolution use the
and
arrows to select a digit you want to change and the
and arrows to increment or decrement the digits. Press to accept the value.
CALibrAt Parameter (disabled when TEDS is enabled) This parameter is used to
calibrate and scale the 9320 with a sensor. There are two basic methods of
calibration available. These are LiVE and tAbLE. There is also a third
parameter, which can be used for
maintenance and recording purposes. This parameter is CAL VAL. The CAL VAL
value can be viewed after a
calibration has been completed and will show the offset and gain figures from
any stored calibration. If these
figures are noted, they can be used to re-enter at a later date, if
calibration data is lost for any reason, or if the calibration data from a
sensor needs to be transferred to another 9320.
tedS Parameter This parameter automatically calibrates the 9320 with the data
from the TEDS chip. The two annunciators
appear when active connection with a TEDS peripheral has been made. When there
is a loss of connection these annunciators flash. When changing a sensor the
9320 should be power cycled as this is when the
TEDS data is read. Calibration Procedures are not available when TEDS is
enabled.
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TEDS limitations / specifications
ERROR 1
Must be DS2431 or DS2433 Device
ERROR 2 & 3 Must use template 33
Template 33 restrictions
ERROR 6
ERROR 4 ERROR 7
ERROR 5
min physical value = >-9999999.0 max physical value = >9999999.0 value precision case = 1 or 2 min electrical value > -5.0mV/V max electrical value < 5.0 mV/V bridge type = FULL (2)
ERROR 8
excitation min = > 5.0 excitation max = < 5.0
Calibration Procedures
The best method of calibration, if it is possible to do so, is the LiVE
calibration, as this reads in the sensor signal at two calibration points and
scales the 9320 automatically. If this is not possible, then the sensitivity
figure (in mV/V) from the sensor calibration certificate can be used to scale
the 9320, by using the tAbLE calibration. This may be the only option
available if you are unable to apply a known stimulus to the sensor, which
quite often is the case.
LiVE Calibration Procedure
When CALibrAt is displayed press
LiVE ? will now be displayed, press
You will be prompted uSE SC ?, this can be selected if you wish to use the shunt calibration figure from a sensor
calibration certificate (care should be taken that the shunt calibration resistor used originally with the sensor is the
same as is fitted in the 9320). If you wish to use this press
otherwise press
You will then be prompted APPLY LO. At this point ensure that the low calibration stimulus is applied to the sensor and allow to settle of approx. 3 seconds, then press
You will then be prompted with dISP LO. Press to enter the display value required with the low stimulus applied
to the sensor. The value can be entered by using the
and
button to select a digit and the
and
buttons to change the digit. When the value has been set press You will then be prompted with APPLY HI (unless you chose to uSE SC ?, in which case jump to the next stage) At this point ensure that the high calibration stimulus is applied to the sensor and allow to settle of approx. 3 seconds, then press
You will then be prompted with dISP HI. Press to enter the display value required with the high stimulus applied
to the sensor. The value can be entered by using the
and
button to select a digit and the
and
buttons to change the digit. When the value has been set press
You should now see donE displayed. This means the calibration was successful, press
to the 9320 to
normal operation mode, with the new calibration data stored. If you see FaiLEd, then you will need to
repeat the calibration, checking that you have completed the procedure in the correct order, and that the sensor is
connected correctly.
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tAbLE Calibration Procedure When CALibrAt is displayed press LiVE ? will now be displayed, press tAbLE ? will now be displayed, press You will be prompted with InPut LO, press
Now enter the `zero’ mV/V output level of the sensor by using the
and
and buttons to change the digit. When the value has been set press
all zeros.
button to select a digit and the .If you do not know this, simply enter
You will be prompted with dISP LO. Press to enter the display value required for the low input figure entered.
The value can be entered by using the and button to select a digit and the and buttons to change the digit. When the value has been set press
You will be prompted with InPut HI, press
Now, using the table/value provided by the sensor manufacturer, enter the mV/V output level by using the and button to select a digit and the and buttons to change the digit.
When the value has been set press For example, if you enter a value of 2.5 mV/V for InPut HI the display will show `2.500000′
You will then be prompted with dISP HI. Press entered.
to enter the display value required for the high input figure
The value can be entered by using the and button to select a digit and the and buttons to change the digit. When the value has been set press
You should now see donE displayed. This means the calibration was successful, press operation mode, with the new calibration data stored.
to the 9320 to normal
If you see FaiLEd, then you will need to repeat the calibration, checking that you have completed the procedure in the correct order, and that the sensor is connected correctly.
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Millivolt per Volt Calibration Procedure
This procedure outlines how a millivolt per volt calibration might be undertaken.
1. Ensure that the factory settings for gain and offset are set to 1 and 0,
respectively. See millivolt per volt
calibration section to do this. 2. Begin by connecting up the model 9320 and a
high precision Multimeter to the calibration source set at
2.5mV/V with a 350 load. 3. Take readings at 2.5mV/V and 0mV/V on both the
model 9320 and the high precision Multimeter. 4. Record your excitation
reading. 5. To convert Multimeter reading to a millivolt per volt reading,
divide the output reading on the meter by the
measured value of excitation.
millivolts per volt (mV/V)=
Output Voltage (mV) _____
Excitation (V)
[ 1 ]
6. The gain is then calculated by dividing the difference in the span of the Multimeter readings by The model 9320 reading.
7. This value can then be entered into the millivolt per Volt Calibration menu under 5.0 gAIn then press
to
confirm. 8. The offset of the model 9320 is derived by subtracting the 0mV/V Multimeter reading from the model 9320
reading.
9. Again, enter this under 5.0 OFFS in the millivolt per Volt Calibration menu then press to confirm.
9320 Reading e.g. 0.000338mV/V @ 0mV/V 2.47993mV/V @ 2.5mV/V
Worked Example
0 mV/V 2.5mV/V
Calibration Source 2.5mV/V @ 350 load
Setup Diagram
Multimeter Reading e.g. 12.234mV @ 2.5mV/V 000.001mV @ 0mV/V Excitation
4.8939 V @ 2.5mV/V Excitation 4.8918 V @ 0mV/V
Using formula above [1]:
0.000204423mV/V @ 0mV/V 2.499846mV/V @ 2.5mV/V
9320 handheld (mV/V) 0.000338 2.47993
Multimeter (mV/V) 0.000204423 2.499846
1. Gain = Multimeter reading / 9320 reading = (2.49984 – 0.000204423)
(2.47993 – 0.000338) 2. Offset = Multimeter reading 9320 reading =
0.000204423 – 0.000338
= 1.008008mV/V (6dp) = – 0.000096mV/V (6dp)
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Specifications
Performance
Input Type: Input Range: Non Linearity: Thermal Drift: Temperature effect on zero (MAX) Temperature effect on span (MAX) Offset stability Gain stability Excitation Voltage: Minimum Bridge Resistance: Internal Battery:
Battery Life:
Update Rate:
*from original offset at any time @ 2.5mV/V ** 1st year
Indication
Display Type:
Display Resolution:
Annunciators:
Control Variables
Front Panel User Keys:
Mechanical Environmental
Settable Parameters:
Electrical Connection: Physical Size: Weight: Legends: Operating Temperature:
Environmental Rating: Enclosure Type: European EMC Directive
Mechanical Dimensions
Strain Gauge Full Bridge Sensors Up ±5mV/V (±50mV/V can be supplied, with
factory set option) ± 50ppm of FR <25 ppm/°C
±7 ppm/°C
±5 ppm/°C
±80 ppm of FR* ±100 ppm of FR** 5Vdc (±4%), 59mA maximum current 85 (4 off 350
sensors in parallel) (350 for power save mode) 2off AA size alkaline, access
via sealed rear compartment 45 hours (Typical 450 hours in low power mode),
with 350 sensor Up to 40mS (can be set in configuration menu)
7½ digit LCD display, 8.8mm high digits
1 part in 250,000 at 1Hz update rate
1 part in 65,000 at 10Hz update rate
Low Battery warning; peak; trough; hold; net; shunt cal; range
Tactile Keys with recessed rims for:ON/OFFSwitches 9320 power on/off
RANGE Selects between two ranges
HOLD Hold the current display value, press again to release GROSS/NET Zero’s display (±100% range)
SHUNT CAL Generates simulated input for indicator
testing
PEAK
Enables peak hold
TROUGH
Enables valley/trough hold
Tare/Zero value; display resolution/decimal point position;
display update rate; low power mode; auto power off;
5 pin Binder socket (mating plug supplied)
See drawing below
250 grams
Insert legends for engineering unit identification (supplied)
-10°C to +50°C
IP65 (when mating plug fitted)
ABS, dark grey (Leather Carry Case Optional)
2004/108/EC BS EN 61326–1:2006
BS EN 61326-2-3:2006
90
34
152
kgf
kN Lbs
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Warrant y
The 9320 is warranted against defective material and workmanship for a period
of (1) one year from the date of dispatch. If the Interface, Inc. product you
purchase appears to have a defect in material or workmanship or fails during
normal use within the period, please contact your Distributor, who will assist
you in resolving the problem. If it is necessary to return the product request
an RMA # and include a note stating name, company, address, phone number and a
detailed description of the problem. Also, please indicate if it is a warranty
repair. The sender is responsible for shipping charges, freight insurance and
proper packaging to prevent breakage in transit.
The warranty does not apply to defects resulting from action of the buyer such
as mishandling, improper interfacing, operation outside of design limits,
improper repair or unauthorised modification. No other warranties are
expressed or implied. Interface, Inc. specifically disclaims any implied
warranties of merchantability or fitness for a specific purpose. The remedies
outlined above are the buyer’s only remedies. Interface, Inc. will not be
liable for direct, indirect, special, incidental or consequential damages
whether based on the contract, tort or other legal theory.
In the interests of continued product development, Interface, Inc. reserves
the right to alter product specifications without prior notice.
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