Mantracourt PSD User Manual

TEDS

Enabled

2 label options available for the PSD

PSD

Strain Gauge or Load Cell Hand Held Display

TEDS enabled

User Manual

MICRON METERS

www.micronmeters.com

[e-mail]

TEDS

enabled

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What is TEDS? ................................................................................................................... 2

Basic concept ................................................................................................................... 2

How it works .................................................................................................................... 2

Advantages ...................................................................................................................... 3

Introduction..................................................................................................................... 4

User Operation ................................................................................................................. 4

Electrical Connection Information .......................................................................................... 5

Sensor Connections ............................................................................................................ 5

RS232 Port Connections ...................................................................................................... 5

Internal Connections .......................................................................................................... 5

Menu Structure ................................................................................................................. 7

millivolt per Volt Calibration Menu Structure ............................................................................ 9

Configuration Menu .......................................................................................................... 10

Calibration Menu ............................................................................................................. 12

Millivolt per Volt Calibration Menu ....................................................................................... 14

Operation Features .......................................................................................................... 15

Normal Display Operation .................................................................................................. 15

Switching the PSD On/Off .................................................................................................. 15

RANGE Button ................................................................................................................ 15

HOLD Button .................................................................................................................. 16

GROSS/NET Button .......................................................................................................... 16

SHUNT CAL Button ........................................................................................................... 16

PEAK Button .................................................................................................................. 16

TROUGH Button .............................................................................................................. 16

Configuration Menu Parameters ........................................................................................... 17

Calibration Menu Parameters .............................................................................................. 19

Calibration Procedures...................................................................................................... 20

Millivolt per Volt Calibration Procedure ................................................................................. 22

Specifications................................................................................................................. 23

Mechanical Dimensions ..................................................................................................... 23

Warranty ...................................................................................................................... 24

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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.

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 PSD 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 85Ω upwards can be used with the PSD.

Configuration and calibration of the PSD is achieved using the front panel push buttons to navigate through
a very simple menu structure.

User functions available on the PSD include:-

Range Selection
Display Hold/Freeze
Gross/Net indication selection
Peak Hold selection
Trough Hold selection
Shunt Cal check

The PSD is powered by two internal non-rechargeable AA alkaline batteries.

User Operation

Operation Annunciators

Unit Labels

6 Push Buttons
used for normal
operation and for
configuration

Full 7 digit LCD
display

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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 +ve Excitation
PIN 2 -ve Excitation & TEDS Common
PIN 3 +ve Signal
PIN 4 -ve Signal
PIN 5 TEDS

RS232 Port Connections

If the PSD 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:-

Shunt Calibration Resistor

Sensor Connections

RS232 option

J9 TEDs Position

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There are six push buttons on the front panel of the PSD, 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 PSD 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 100kΩ 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 PSD 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.

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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

LiVE?

0000.000

uSE SC?

APPLY LO

dISP LO

0000000

APPLY HI

dISP HI

0000000

donE

APPLY LO

dISP LO

0000000

dISP HI

0000000

donE

CALibrAt

tAbLE?

InPut LO

0000000

dISP LO

0000000

InPut HI

0000000

dISP HI

0000000

donE

CAL VAL?

SEt 9Ain

0000000

SEt OFFS

donE

0000000

RETURN TO

NORMAL DISPLAY

MODE

tedS

EnAbLEd?

*

* Note:Only when TEDS is disabled

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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

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 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.

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 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 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 PSD 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-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 update per
second and pulses the sensor excitation. This results in a lower accuracy (1 part in 20,000).

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 (between 00 and 04 leaves the PSD 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 To skip this parameter and exit menu
Press

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 PSD. 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

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 PSD, when
connecting to sensors with a sensitivity of greater than 5mV/V. The PSD 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 PSD 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 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.

To save the settings and move on to the next parameter press

CALibrAt

THIS MENU IS DISABLED WHEN TEDS IS ENABLED

Press

to skip to next menu item.

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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tedS

ENABLING TEDS DISABLES CALIBRATE MENU

Press

to skip this parameter and exit menu

Press

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

. If you have selected enabled, two

flashing indicators will appear.

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

5.0 gAIn

Press

To skip to next menu item

Press

To change the 5mV/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.

5.0 OFFS

Press

to skip to next menu item

Press

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.

50 gAIn

THIS CAN ONLY BE SET WHEN USING 50mV/V RANGE

Press

To skip to next menu item

Press

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.

50 OFFS

THIS CAN ONLY BE SET WHEN USING 50mV/V RANGE

Press

to skip to next menu item

Press

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 PSD has a full 7 digit dis play, which can be scaled us ing the calibrati on menu to suit t he application i t 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 PSD has two independent ranges. All values set in one range are totally independent from the other.

Switching the PSD On/Off

The PSD 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 PSD automatically switches itself
off after a preset time, if there is no keyboard activity.

RANGE Button

The range feature allow s for the setting of two to tally 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 calibratio n menu or co nfigura tion m enu, the paramet ers you w ill be setti ng are those for
the range you have selected. An annunciator is lit to identify which range has been selected.

The PSD is supplied with engineering unit legends; thes e can be slid into a window, located on the i nside of the
front panel. These labels then help to further identify the unit s being display ed for each range. Please ref er to the
photo below:-

Legend labels are
inserted both sides

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HOLD Button

The hold button allows the user to f reeze the display when it i s pressed. When press ed again the dis play returns to
it’s normal operat ing mode. When in hold mo de the displa y will fla sh and the ho ld annunciat or 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 PSD is in either peak or trough hold mode.

GROSS/NET Button

The gross/net button, when press ed, to gg les bet ween the g ro ss a nd net dis play va lues. Thi s ena bles the user to zero
the display (by putting the PSD into net mode) and displaying the change in display value from that point.

This is useful for certai n wei ghi ng a pplica ti o ns w here a t are w eig ht ex i st s, w hich ca n be remo ved by putting the PSD
into net mode.

SHUNT CAL Button

The shunt calibration button, when pres sed, puts an inter nal 100kΩ resisto r across the –ve excitat ion 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 t he sensor has been calibrated with the PSD and noted down f or later reference. The
value noted can be used to get a n idea of the calibrati on accuracy at a la ter date, or for checking t he 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 PSD into peak mode. This will displa y 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 pea k mode it is possible t o 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 PS D into trough mode. This will display t he lowest dis play reading a nd 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 t rough mode it is possible to capture tro ughs 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 fix ed display offset values
from the display, so tha t the GRO SS a nd NET fea t ures ca n o perat e fro m a zero po int . This ma y a lso be cons i dered as
a manual tare facility . To zero the dis play, simply enter t he value that yo u wish to subtract f rom 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 o nly updates at this rate when in the PEAK or TROUGH mode. When in no rmal 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 updat e the display ev ery 100m S, 300mS , 1000m S and 2000mS respecti vely. The
PSD when it leaves the factory is set at 3Hz.

SEt OVEr Parameter

The SEt OVEr pa rameter allows the user to set a visual ala rm. The value that is entered is the dis play value that
you want the alarm to activate at. When the alarm is activated the word OVErLOad a ppears 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 feat ure, or simply as a quick indica tion of when a preset level has
been reached.

This value entered can be anywhere over the entire dis play range, so t here are no limitatio ns. Different values and
settings are available for each RANGE.

SEt OPEr Parameter

The PSD has a special power saving mode, which c an be enabled or disabled within this param eter, pressing
when asked whether you wis h to select P SAvE? will put the PSD into power save mode for t he 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 a ccuracy is reduced, as is the update ra te. When in this mode, the quickest upda te rate is
3Hz and the accura cy of the dis play is reduced t o 1 digit in 10 ,000. It is import ant to note these limit ations when
deciding whether to us e the power save facility. However, it is also possible to set one RAN GE with power save
activated and the other without.

The benefit is that the battery life, based on a 350 Ω sensor bridge bei ng c onnected, increa ses f rom 45 hours t o 45 0
hours.

It is also important to remember t hat when the PSD is re-calibrated wit h a sensor, the power save fa cility will be
automatically turned off . The power save facility w ill therefore need to be re-activa ted after calibration ha s been
completed.

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AUtO OFF Parameter

The AUtO OF F parameter is another power saving f eature. It allows for the setting o f 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 PSD detects no keyboard
activity for a continuous 25 minute period, then the PSD will power down, to cons erv e pow er. If key boa rd a cti vi ty 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 PSD be left unintentionally powered on.

rS232 Parameter

This parameter allows the user to enable the RS232 output form the PSD, by pressing when prompted by

EnAbLEd? On the display, pressing will disable the RS232.

The output format is ASC II. 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 = 9600 baud
Stop bits = 1
Parity = None
Data bits = 8

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Calibration Menu Parameters

SEnS 5.0 Parameter

The PSD is factory set to ena ble cali brat io n wi th s enso rs genera ti ng a n i nput si g nal o f 5 mV /V o r less . In the ma jori ty
of cases it will no t be necessa ry to read hig her signal levels. If however, a hig her sensiti vity sens or is used with the
PSD, it will be necessary to gai n access to t he internal PCB (yo u must t urn the PSD of f) to mo ve link LK 1 to JP1 (see
picture below) to allow the PSD to accept sensitivities of up to 50mV/V. TEDS s hould only be used with 5mV/V as
50mV/V is not factory calibrated.

Once this link has been moved, yo u will need to go back int o the CALIBRATION MENU. When re enteri ng the menu,
you will notice that the parameter SEnS 5.0 has chang ed to SEnS 50.0 to change the sensitivity to 50mV/V press

, the PSD will now check the position of the link and change the sensitiv ity. It will now be necessary to re-

calibrate any sensors that you may previously have calibrated to this instrument.

SEt rES Parameter

This parameter enables the s ett ing of tw o f eatures on the PSD. It allows you to set the decimal point position of the
display, by pressing the

and together, to mov e the point position (each press moves the decima l point

position, one place to the right).
It also allows for t he setting of the display resolution o r the number of display counts t he display changes with a n

input change. To change t he resolution use the

and arrows to select a digit you wa nt 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 PSD with a sensor. There are tw o basic methods of calibratio n
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 off set a nd ga in f ig ures f ro m a ny st o red cali brat io n. If t hese f ig ures a re no ted, they can
be used to re-enter at a later date, if calibra tion da ta is lost for any reaso n, or if the cali bratio n data from a senso r
needs to be transferred to another PSD.

tedS Parameter

This parameter automatically calibrates the PSD 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 chang ing a sensor the PSD sho uld be power cycled as this is w hen the TEDS data is read.
Calibration Procedures are not available when TEDS is enabled.

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

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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 min physical value = >-9999999.0
max physical value = >9999999.0
ERROR 4 value precision case = 1 or 2
ERROR 7 min electrical value > -5.0mV/V
max electrical value < 5.0 mV/V
ERROR 5 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 PSD automatically. If this is not possible, then the sensitivity figure (in mV/V)
from the sensor calibrati o n certi fi ca te ca n be us ed to sc ale the PS D, by us ing 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 s elected if you wish to use the shunt ca libration figure from a sens or
calibration certifi cate (care should be ta ken t hat the s hunt calibra tion res isto r used ori gina lly with th e senso r is the

same as is fitted in the PSD). If you wish to use this press

otherwise press
You will then be prompted APPLY LO. At this point ensure that the low ca librati on sti mulus is applied to the senso r
and allow to settle of approx. 3 seconds, then press

You will then be prompt ed wi th 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 di git and the and

buttons to change the digit. When the value has been set press
You will then be prompted with APPLY H I (unless you chose to uSE SC ?, in which case jump to the next stage) At

this point ensure that the hig h calibra tion s timulus is a pplied to the sens or and allow to settle of approx . 3 s ec o nds ,
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 di git 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 PSD 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 co mpleted the procedure in the co rrect 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 us ing the

and button to select a digit and the

and

buttons to change the digi t. When the value has been set pres s .If you do not know this, simply enter

all zeros.

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 digi t 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/va lue provided by t he senso r manufa cturer, enter the mV/ V output level by usi ng t he

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 to enter t he display value required for the high input figure
entered.

The value can be entered by using the

and button to select a digi t 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 PSD to normal
operation mode, with the new calibration data stored.

If you see FaiLEd, then yo u wi ll need t o repea t t he calibrat ion, checki ng tha t you hav e completed t he procedure in
the correct order, and that the sensor is connected correctly.

Mantracourt Electronics Limited PSD User Manual

22

Millivolt per Volt Calibration Procedure

This procedure outlines how a millivolt per volt calibration might be undertaken.

1. Ensure that the factory set tings for gain and offs et are set to 1 and 0, respectiv ely. See millivolt per volt
calibration section to do this.

2. Begin by connecting up the model PSD and a high precision Multimeter to the calibration source set at

2.5mV/V with a 350Ω load.

3. Take readings at 2.5mV/V and 0mV/V on both the model PSD and the high precision Multimeter.

4. Record your excitation reading.

5. To convert Multimeter reading t o a mi llivolt per volt rea ding, div ide the out put reading on the meter by the
measured value of excitation.

6. The gain is then ca lculated by dividing the dif ference in the span of the Multi meter readings by The model
PSD 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 PSD is derived by subtracting the 0mV/ V Multimeter reading from the model PSD
reading.

9. Again, enter this under 5.0 OFFS in the millivolt per Volt Calibration menu then press to confirm.

Setup Diagram

Worked Example

PSD handheld (mV/V) Multimeter (mV/V)

0 mV/V

0.000338

0.000204423

2.5mV/V 2.47993 2.499846

1. Gain = Δ Multimeter reading / Δ PSD reading = (2.49984 - 0.000204423) = 1.008008mV/V (6dp)

(2.47993 - 0.000338)

2. Offset = Multimeter reading – PSD reading = 0.000204423 - 0.000338 = - 0.000096mV/V (6dp)

Output Voltage (mV)

millivolts per volt (mV/V)= _____________
Excitation (V)

Calibration Source

2.5mV/V @ 350 Ω load

PSD Reading e.g.

0.000338mV/V @ 0mV/V

2.47993mV/V @ 2.5mV/V

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

[ 1 ]

Mantracourt Electronics Limited PSD User Manual

23

Specifications

Performance

Input Type:

Strain Gauge Full Bridge Sensors

Input Range:

Up ±5mV/V (±50mV/V can be supplied, with factory set option)

Non Linearity:

± 50ppm of FR

Thermal Drift:

<25 ppm/°C

Temperature effect on
zero (MAX)

±7 ppm/°C

Tem

perature effect on

span (MAX)

±5 ppm/°C

Offset stability

±80 ppm of FR*

Gain stability

±100 ppm of FR**

Excitation Voltage:

5Vdc (±4%), 59mA maximum current

Minimum Bridge

Resistance:

85Ω (4off 350Ω sensors in parallel)

Internal Battery:

2off AA size alkaline, access via sealed rear compartment

Battery Life:

45 hours (Typical 450 hours in low power mode), with 350Ω

sensor

Update Rate:

Up to 40mS (can be set in configuration menu)

*from original offset at any time @ 2.5mV/V ** 1st year

Indication

Display Type:

7½ digit LCD display, 8.8mm high digits

Display Resolution:

1 part in 250,000 at 1Hz update rate
1 part in 65,000 at 10Hz update rate

Annunciators:

Low Battery warning; peak; trough; hold; net; shunt cal; range

Control Variables Front Panel User Keys:

Tactile Keys with recessed rims for:-

ON/OFF Switches PSD 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

Settable Parameters:

Tare/Zero value; display resolution/decimal point position;
display update rate; low power mode; auto power off;

Mechanical

Electrical Connection:

5 pin Binder socket (mating plug supplied)

Physical Size:

See drawing below

Weight:

250 grams

Legends:

Insert legends for engineering unit identification (supplied)

Environmental

Operating Temperature:

-10°C to +50°C

Environmental Rating:

IP65 (when mating plug fitted)

Enclosure Type:

ABS, dark grey (Leather Carry Case Optional)

European EMC Directive

2004/108/EC

B

S EN 61326—1:2006

BS EN 61326-2-3:2006

Mechanical Dimensions

The Case is Registered Design No. 3021311

Mantracourt Electronics Limited PSD User Manual

24

Warranty

The PSD is warranted against defective material and workmanship for a period of (1) one year from the date of
dispatch.
If the MANTRACOURT ELECTRONICS LTD' 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 to 'MANTRACOURT ELECTRONICS LTD' please 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.

'MANTRACOURT ELECTRONICS LTD' 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. 'MANTRACOURT ELECTRONICS LTD' specifically disclaims any implied
warranties of merchantability or fitness for a specific purpose. The remedies outlined above are the buyer’s only
remedies. 'MANTRACOURT ELECTRONICS LTD' will not be liable for direct, indirect, special, incidental or
consequential damages whether based on the contract, tort or other legal theory.

An

y corrective maintenance required after the warranty period should be performed by 'Mantracourt Elec tronics Ltd' app roved personnel only.

I

n the interests of continued product d ev elo pment, Mantracourt Electronics L imit ed res erv es t he right t o a l t er pro d uct s pecifications without prior notice.

Code No. 517-173 Issue 3.1 22.10.14