Interface 9320 Battery Powered Portable Load Cell Indicator User Manual

June 6, 2024
Interface

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)

Interface Inc.

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9320 User Manual

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

Interface Inc.

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9320 User Manual

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.

Interface Inc.

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9320 User Manual

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