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FieldSens User manual Opsens Inc

1. 3 1 8 Select Button This button is a shortcut that brings the user directly to the menu item for selecting a new sensor being used 3 1 9 Null Button measurement display This button is also used for zeroing a sensor when the system Mm This button allows to cancel most operations taking place and return directly to the NULL is not within the menu measurement display mode 3 2 Main Menu When the Menu button is pressed the display shows the following submenus e Probes e Setting e Diagnostic The Probes submenu is used to define select modify and delete sensor definitions in the sensor list The Setting submenu is used to modify the general system settings such as averaging mode and analog output configuration The Diagnostic submenu is used the display some quality indicators on the optical signal from each channel This is useful for troubleshooting purpose 3 3 Probes Submenu The Probes submenu is where all sensor related commands are made 3 3 1 Def Probe This command is used to define the parameters for a new sensor It has been described in section 2 3 1 Opsens Inc 9 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 3 3 2 Sel Probe This command is used to select a sensor for each channel It has been described in section 2 3 2 3 3 3 Mod Probe This command is used to modify the parameters for a sensor that has been already defined It works basically the same way as the Def P
2. FieldSens User Manual FieldSens User Manual FieldSens User manual Opsens Inc 2014 Cyrille Duquet Suite 125 Quebec city Quebec G1N 4N6 Canada Tel 418 682 9996 Fax 418 682 9939 info opsens com www opsens com Opsens inc IMP0047 v4 FieldSens User Manual doc FieldSens User Manual WARRANTY All products manufactured by Opsens inc are warranted to be free of defects in workmanship and materials for a period of one year from the date of shipment No other express warranty is given and no affirmation of Seller by words or actions shall constitute a warranty SELLER DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSES WHATSOEVER If any defect in workmanship or material should develop under conditions of normal use and service within the warranty period repairs will be made at no charge to the original purchaser upon delivery of the product s to the factory shipping charges prepaid If inspection by Opsens or its authorized representative reveals that the product was damaged by accident alteration misuse abuse faulty installation or other causes beyond the control of Opsens this warranty does not apply Service repairs or disassembly of the product in any manner performed without specific factory permission voids this warranty OPSENS MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MANUAL INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY A
3. LCD screen display standard not available on 32 channel model Can be ordered without display 9 to 24 VDC 2 5 Watt typical 40 C to 70 C 0 C to 45 C 95 non condensing 40 000 hours MTBF 4 8 12 or 16 17 FieldSens User Manual 6 Internal Memory 6 1 General description The FieldSens signal conditioner is supplied with an onboard non volatile Flash memory chip The Flash memory allows over 1 000 000 individual physical measurements to be stored A maximum of 8 acquisition files can be stored in the FieldSens internal memory whether or not the 1 000 000 available measurement spaces have been used After all the available memory has been filled or if 8 acquisition files are stored in the Flash Memory chip the memory will have to be cleared either by retrieving the files using SoftSens or by deleting the files to allow for new acquisition procedures 6 2 Configuring the memory from the front panel The measure period is the main parameter to configure It corresponds to the frequency at which you want the instrument to memorize one physical measurement value for each optical channel that is enabled The measure period is set in number of seconds so for example if 1 physical measurement per channel is required every 15 minutes then the value entered should be 15 minutes x 60 seconds minute 900 seconds 900 Note that the measure period cannot be set to a value lower than the instrument s minimal measur
4. see Section 2 1 This button is disabled O 3 1 2 Menu Button Menu button gives access to the system menus Once in the menu this button brings the user one level higher into the menu hierarchy Once at the root the system will exit the menu and goes back to measurement display 3 1 3 Left Right Arrows Left Right arrows allows navigating 1 within the Gauge Factors of a given sensor being defined selected modified or deleted or 2 it allows moving from one digit to the other when a value is being entered 3 1 4 Up Down Arrows Up Down arrows allows navigating 1 between menu items of a given hierarchical A level or 2 it allows changing a value being entered 3 1 5 Confirmation button Confirmation button permits confirming 1 a new value being entered 2 confirm the selection of a menu item then moving one hierarchical level lower 3 refreshing displayed value in the case of diagnostic 3 1 6 Scan Button Opsens Inc 8 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual Pressing this button stop the scanning measurement over all channels and reads only a single channel at full speed The user can select the channel by using the up down left right arrows Pressing the SCAN button once again resumes to the scanning of all enabled channels 3 1 7 Define Button This button is a shortcut that brings the user directly to the menu item for defining the Gauge Factor of a new sensor
5. COMMUNICAIONS AS A a us vad om A net ne Eee eue 11 3 4 6 E 11 3 5 Diagnos lie SUDINGIN ER A A A TAREA 12 4 Remote operati N snou er iaa aa 14 4 1 SA A A A EE E RE RER 14 4 2 R485 SCD E E E E AE T OEE 14 D SDO CHICALIONS idilio le dica 17 6 MA en e ne can annees nes sue aa 18 6 1 NT 18 6 2 Configuring the memory from the front PANE 1 1scsececcccccceceenenennneneennensneseeeeeeenenanansnsasnseseseseeeeeeeanannasssessenees 18 6 2 1 Set Period notimbl mented yel atado A di A tit 19 6 2 2 AA PPP EaEZEEEZEZEZELEZ 19 6 2 3 AS Te ey A er ee ee eee 19 6 2 4 Delete Al asco eA eho hf tO o lac O 20 6 3 D ring AN ACOUISINOR sonic are ERA ane A SU este nas encres A nat eee 20 6 4 PICQUISITION THE TOITIOVAl E A a AA 20 Opsens inc V Table of content IMP0047 v4 FieldSens User Manual doc FieldSens User Manual Opsens inc IMP0047 v4 FieldSens User Manual doc yi 1 FieldSens User Manual FieldSens Operating Principle The FieldSens is a fiber optic white light interferometric multi channel signal conditioner having the capability of accurately measuring the absolute path length difference of various type of sensing interferometers Opsens produces a variety of interferometric sensors that are based on either so called Fabry Perot interferometer low finesse version configuration or on the polarization interferometer configuration For example Opsens temperature sensors are based on a polarization sensing interferom
6. Ce CE Table 3 RS 485 communication setup Opsens Inc IMP0047 v4 FieldSens User Manual doc 15 FieldSens User Manual i 4 H id X RE Tx 7 To other slave units Figure 7 Wiring diagram for RS 485 4 wires Network For a network at 9600 and 19200 bauds Opsens does not recommend the use of termination resistors For more information on this subject and for a general discussion on RS 485 network topology several resources are available freely One of these is RS 422 and RS 485 Application Note from B amp B Electronics available at the following URL address http www bb elec com tech_articles rs422 485 app note table of contents asp Opsens Inc 16 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 5 Specifications Number of channels Compatibility Full scale Resolution Precision Sampling rate Channel scanning rate Output interface Display Input power Consumption Storage temperature Operating temperature Humidity Light source life span Number of channels Opsens Inc IMP0047 v4 FieldSens User Manual doc 4 8 12 or 16 All Opsens WLPI fiber optic sensors 30 000 nm path length difference 0 003 of F S no averaging 0 01 of F S 3 3 sigma limit 99 9 confidence level 20 Hz standard rate given for a fixed channel 6 67 Hz maximum channel to channel scan period 150 ms RS 232 and RS 485 serial output SCPI protocol
7. Even Odd Default None Stop bits Flow control Handshaking Table 2 RS 232 and RS 485 communication setup The serial interface remote control commands are based on the standard SCPI syntax Standard Commands for Programmable Instrumentation The user can create its own remote control software using the various SCPI commands available for the FieldSens But for ease of operation Opsens provides its own control software called SoftSens which gives access to all the functionalities of the instrument See SoftSens user manual for how to remotely control the FieldSens conditioner For those who which to develop their own remote control software ask for Opsens Serial communication user manual to get all the information about serial interfacing with Opsens signal conditioners 4 1 RS 232 Setup The RS 232 communication link is made trough a standard DB 9 connector on the signal conditioner unit 4 2 RS 485 Setup The RS 485 communication link is made trough a RJ 45 modular receptacle 8 positions on the signal conditioner unit The pinout for this receptacle is illustrated in figure 1 as seen from the front of the instrument Opsens Inc 14 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual pin 8 pin 1 Figure 6 Pinout of RS 485 RJ 45 connector receptacle The table 3 lists the RS 485 signal associated with each pin oe RS 485 signal Not connected N i Not connected Not connected
8. User Manual 2 Quick start 2 1 Power supply The FieldSens accepts supply voltage from 12 to 24 VDC The supply connection is made through the 2 positions terminal blocks left side ground right side positive located on the front panel Figure 1 Connect a voltage source of 12 to 24 VDC to the power input terminal block common positive Once connected the green LED should go ON indicating that the FieldSens is powered correctly NOTE the red LED is reserved for future use OPSer ON OFF ON OFF switch Status LEDs RS 232 connector RS 485 connector MODBUS RS 485 PaL Power input terminal POWER ESC block Figure 1 Power supply and communication connectors 2 2 Sensor connection Opsens fiber optic sensors or transducers must me mated to the FieldSens output connectors Figure 2 The optical connectors provided with the FieldSens is usually a Square push pull SC type connector mounted with a SC SC type mating Remove the protective cap of the mating engage the sensor connector with the orientation key properly oriented and push until it clicks into its place Always clean the sensor connector prior to connect it to the signal conditioner with the included connector cleaner Use a fresh section of cleaning cloth every time Ask for Opsens Fiber Optic Cleaning Guide for further information on how to clean fiber optic connectors NOTE Always clean the connector ferrule end face with the include connecto
9. into the FieldSens non volatile memory Sensor definition and then the defined sensor must be selected Sensor selection on the specific channel These numbers contain the parameterization factors of the sensor that is the sensor type and the sensor calibration parameters These factors are indicated on a label fixed on the optical cable of the sensor nearby the optical connector as indicated on the left figure The label shows the identification number of the sensor used for record purpose only the Gauge Factors GFO GF1 and the Sensor Type The type of the sensors depends of the physical parameter to be measured For example the T type T1 T2 etc are used for defining temperature sensors the P type P1 P2 Pv etc are used for defining pressure sensors and the S type are used for defining strain sensors There are also special type definitions that are the N type and the X type which are not related to any specific sensor These are needed for internal calibration purpose only and should be not used unless instructions have been given by Opsens to do so 2 3 1 Define a sensor Before selecting a specific sensor it must be defined that is its corresponding Sensor Type and Gauge Factor must be stored into the non volatile memory of the instrument The following example shows how to define a Pr type pressure sensor Opsens Inc 5 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual gB Enter Define Sensor Menu D PO
10. 2 2 1 POWER SUD DIY ican siete RER jecamaces suas E a EA Ea A a a E EE RER RE RE TOR ARS 2 2 2 Sensor CONMCCHON icc howler O 2 2 3 FICIASENS SOUND nn nn dci 5 2 3 1 DEME ASENSO rana nn aed eed seaside tasses osa 5 2 9 2 Select a sensor among previously defined Sensors sise 6 2 3 3 Zeroing a sensor When tequila nan 7 2 4 FieldSens remote connection and control 11 111seeeeeseeesesesesesnseeesnsesesnsnseseseensnsesnsesesesnensesnsnsnsesnsnsneneneneneeeeenenees 7 2 5 Analog output optional sissies sites tre en rs aaa leal 7 3 POCA Operati N ra nd tone en teinte 8 3 1 KOVDOAIG zenenan R O EE E AE ERE O E A E E E ERE 8 3 1 1 SWC NON O Mea eaea O 8 3 1 2 A A O O er 8 3 1 3 ESTU RIORTANOWS lt a ciiaiba potdamtarw tete rocio 8 3 1 4 DU Ain nes dd ne caen ini a tan eee de en ne on 8 3 1 5 CONTMAION DUMONT datant nee oi ea nn Ras nee nant Une dl Rare ane Ten ORNE 8 3 1 6 GAIT OM PR a nerd PE ET 8 3 1 7 HEMME BURON monien e e o eet a dl O 9 3 1 8 A O oe aw eM AT ae 9 3 1 9 A o ee E eee ee ee eee ee 9 3 2 Main Menu asinan TR CR AA VER eee eae 9 3 3 PODES SUDAN A a 9 3 3 1 D POT ada iia 9 3 3 2 A de a ice ie eu en ei ee tous 10 3 3 3 MOT PODE tr RER e RO eee ne 10 3 3 4 BE A q Se a eee Se 10 3 4 SEHMING SUDMONU nsc around lea etat rise de ne vasivibes id e ti a a r a a a 10 3 4 1 A RS A nd as ds nes i asa Si cance adn nl ant D An en amu ila eee ads 10 3 4 2 VOTO Le TA AES OEA NETE licencia cogida 10 3 4 3 E E 10 3 4 4 A EEE EL 11 3 4 5
11. ND FITNESS FOR A PARTICULAR PURPOSE Opsens shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material This warranty does not apply to the transducers sold for use with Opsens signal conditioners IMPORTANT NOTICE The product specifications and other information contained in this manual are subject to change without notice Opsens has made a concerted effort to provide complete and current information for the proper use of the equipment If there are questions regarding this manual or the proper use of the equipment contact Opsens inc at TEL 418 682 9996 WEB SITE www opsens com FAX 418 682 9939 E MAIL info opsens com PACKAGING FOR SHIPMENT If the product must be shipped to a different location or returned to Opsens for any reason through a common carrier it must be properly packaged to minimize risks of damage SOFTWARE LICENSE AGREEMENT This product contains intellectual property i e software programs that are licensed for use by the end user customer hereinafter end user This is not a sale of such intellectual property The end user shall not copy disassemble or reverse compile the software program The software programs are provided to the end user as is without warranty of any kind either express or implied including but not limited to warranties of merchantability and fitness for a particula
12. SEZ O Wl A A Select Sensor Type use up or Def Probe gt Type Pr down arrow keys Der wie Press Y key to accept the type E Obs Y Y and V key again to edit the Nam Pr 00 OK name of the sensor CE is POCO EE z 00010 Use Default Name or select a Def Probe A y Y name for the sensor using up or gt Nam P r 0 0 OK gt Repeat above procedure if other New Ped OK GF are required NN GF1 23210 GF2 6400 entry with the confirm V key En 123210 622 0000 Def Probe o O0 to gt C Enter Gauge Factor GF1 use Plone Nessie arrow keys and validate the Nam Pr00 OK o Def Probe A Select OK and press the Nam Pr00 gt OK Y confirm V key GES 432 E 6400 wow wen Quit the menu 2 3 2 Select a sensor among previously defined sensors Once a sensor is defined it can be selected for a specific channel as indicated below example for selecting in channel 2 1 gt None 2 None Enter Sensor Select Menu 3 None 4 None 1 None Select a channel using the 2 None y Y direction arrows and then the 3 None confirm V key 4 None 1 None A Select sensor using the up down ES Y arrows 3 None 4 None O Opsens Inc 6 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 2 3 3 Zeroing a sensor when required If required zeroing a sensor is easily done with the NULL button example for selecting in channel 2 l gt AN os ns From the measurement display 2 14 Spsi screen
13. asure period 6 2 2 Start In the Start submenu the screen presents a YES or NO option list use the Up and Down amp buttons to select Yes or NO and then press the Confirmation button amp to lock down the new value selected The acquisition procedure will go on until either it is stopped manually through the Stop submenu or until the remaining memory space is filled up If the available memory has been filled or if 8 acquisition files are stored in the Flash Memory chip the FieldSens will not allow a new acquisition to be started and the following message will appear Measure Meas Acquisition ACQ is running Press Menu to Exit Existing acquisition files will need to be downloaded to a computer using Opsens SoftSens application or SCPI commands or deleted from the internal memory for a new acquisition to be started 6 2 3 Stop ACQ In the Stop ACQ submenu the screen presents a YES or NO option list use the Up and Down buttons to select Yes or NO and then press the Confirmation button amp to lock down the new value selected Opsens Inc 19 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 6 2 4 Delete All The FieldSens front panel menus allow for the deletion of all the data files stored in the internal memory It will not allow the deletion of an individual acquisition file To delete individual files use Opsens SoftSens application or SCPI commands Note that the files will be deleted so the da
14. e period which is determined by the number of optical channels that are enabled and the time to switch through all channels If a lower value is entered the instrument s minimal measure period will be activated Note that the measure period value entered by the user will be rounded up or down to the closest compatible time value corresponding to a factor of the instrument s minimal measure period Acquisitions can be manually started stopped and deleted from the FieldSens signal conditioner More advanced acquisition configuration is available through Opsens SoftSens application requires SoftSens version 2 18 or greater Please refer to the SoftSens User Manual In the Memory submenu there are three submenus e Start e Stop Acquisition Stop ACQ e Delete All Opsens Inc 18 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 6 2 1 Set Period not implemented yet In the Set Period submenu use the Left E and Right buttons to select the digit you want to edit and then use the Up 48 and Down 44 buttons to edit the digit of the measure period value in number of seconds When all digits are set press the Confirmation button amp to lock down the new value entered The newly set measure period will be displayed in the Set Period submenu Note that the measure period value entered by the user will be rounded up or down to the closest compatible time value corresponding to a factor of the instruments minimal me
15. eter using the temperature dependent optical properties of a birefringent crystal while Opsens pressure strain and displacement sensors are based on a Fabry Perot sensing interferometer where the distance between the two mirrors of the interferometer varies as a function of the measured parameter In all cases the sensing interferometer is made so its path length difference varies with the physical parameter of interest The path length difference of the sensing interferometer is accurately measured with a nanometer resolution and this over 30 000 nanometers range Physical measurements are possible if the path length difference of the sensing interferometer is a univocal function of the parameter under scrutiny This being the case with Opsens sensors the FieldSens must know the relation between the path length difference and the physical parameter The Gauge Factors or equivalently the calibration factors that comes with Opsens sensor contain all the information needed by the FieldSens to perform the conversion from the measurement of the path length difference to the physical value being measured For readers that may need to have a better understanding of the operating principle of the FieldSens we refer to the white paper IMP0002 entitled Opsens White Light Polarization Interferometry Technology available on Opsens web site http www opsens com pdf WLPI pdf Opsens Inc 1 IMP0047 v4 FieldSens User Manual doc FieldSens
16. nit Amplifier gain Lm 47 Lamp driving level Ct 18 Signal contrast SNR 485 no unit Signal quality The following table shows diagnostic values with good signal poor signal or with a broken sensor fault A fault condition results in a No Signal being displayed Parameter Good signal Poor Signal Fault Lg gt 2 2 lt 2 2 Ga lt 2 0 gt 2 0 Lm lt 90 gt 90 Ct gt 15 lt 15 SNR gt 200 lt 200 lt 100 NOTE Without a sensor connected the instrument shows the message NoS or No Signal on its display In the unlikely situation that this message appears while a sensor is connected to the unit take note of the diagnostic parameters and contact Opsens technical support Opsens Inc 12 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual During a No Signal condition the analog output and the serial ports output constant values as follow Output No Signal condition output value Analog 0 Volt RS 232 or RS 485 65 536 0 Opsens Inc 13 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 4 Remote operation Opsens FieldSens signal conditioner comes with RS 232 and RS 485 serial communication interfaces to allow control with a remote computer The RS 232 and RS 485 interface settings are indicated in the following sections Configurable Baud rate 9600 19200 38400 57600 115200 Default 9600 Data bits Configurable Parity None
17. press the confirm V key 3 TA Opol 4 14 4psi 1 14 6psi Select a channel using the 2 gt 14 3psi direction arrows and then the 3 Ia pel confirm V key 2 LA ea 1 TAL Sosa Press the NULL button and the 22 O Usd reading from that channel is 14 8psi zeroed i 4 14 4ps1 NOTE Without a sensor connected the FieldSens shows the message NoS or No Signal on its display 2 4 FieldSens remote connection and control The FieldSens comes with RS 232 and RS 485 serial communication ports Either one can be choosen from the Settings menu see later The FieldSens is remotely controlled by having a computer linked to this serial port and using the SoftSens software provided with the signal conditioner With RS 232 serial communication simply connect a standard serial cable all wires straight through to the FieldSens DB 9 connector and to a remote computer Then open SoftSens software as indicated in SoftSens user manual 2 5 Analog output optional Sensor readings are available for each channel at the analog output terminals available as a factory installed option located on the front panel of the instrument See section 3 4 3 for configuring the offset and scaling of the voltage output Opsens Inc 7 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 3 Local Operation 3 1 Keyboard puna ly e o y fool ooo fu 3 1 1 Switch on off The instrument is switched on off with the black hard switch
18. r cleaner before each connection Failure to do so can result in permanent Opsens Inc 2 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual damage to the connector caused by hard particles trapped between the fiber optic end faces NOTE Always replace the protective dust cap on the mating when there is no sensor connected and always replace the protective dust cap on the sensor fiber optic connector when not in used Figure 2 Remove the protective cap before connecting Figure 3 Always clean the end of the connector ferrule before each connection Opsens Inc 3 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual Figure 4 Engage the sensor connector with the orientation key properly oriented and push until it clicks into place Figure5 To disconnect grab the square connector body and just pull Opsens Inc 4 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual 2 3 FieldSens setup The FieldSens is compatible with all Opsens WLPI type sensors or transducers for measuring various parameters SENSOR LABEL ata p A such as temperature pressure strain and displacement oo Cause factors GFO SF1 Note that the GaAs type PowerTemp temperature Type Pr e Sensor type sensors are compatible with either the TempMonitor or the PicoM signal conditioners only To properly use a specific sensor its corresponding Sensor Type and Gauge Factor s must be entered
19. r purpose The entire risk of the quality and performance of the software program is with the end user Opsens inc ii IMP0047 v4 FieldSens User Manual doc FieldSens User Manual WARNINGS Opsens inc WARNING HIGH PRESSURE High pressure gases and liquids are potentially hazardous Energy stored in these gases or liquids can be released suddenly and with extreme force High pressure systems should be assembled and operated only by personnel who have been trained in proper safety practices WARNING HIGH STRAIN Highly strained materials and parts are potentially hazardous Energy stored in these materials or parts can be released suddenly and with extreme force Highly strained systems should be assembled and operated only by personnel who have been trained in proper safety practices WARNING NOT EXPLOSION PROOF Installation of this instrument in an area requiring devices rated as intrinsically safe is not recommended WARNING VOLTAGE SUPPLY Use only the wall plug in power supply delivered with your FieldSens and verifies that the input voltage and frequency are compatible with the power outlet IMP0047 v4 FieldSens User Manual doc FieldSens User Manual Opsens inc IMP0047 v4 FieldSens User Manual doc FieldSens User Manual Table OF CONAM ci V 1 FieldSens Operating Principle cccsssseecsessseeesceenseeeeeseeeeseenseeeseeeseeeseenseees 1 2 QUICK Stalin cate ae eee eae ees
20. robe function described in section 2 3 2 3 3 4 Del Probe This command is used to delete a sensor from the sensor list Select the sensor name to delete with the up down arrows and pressing the confirm V key 3 4 Setting Submenu The functions below are used to setup specific parameters of the instrument Some of the settings are not necessary related to a specific sensor 3 4 1 Channels This function is used to enable ON of disable OFF some or all channels Use the up down arrow to select the channel press the V key use the up down arrow to select OO or OFF and press the V key again 3 4 2 Average The user can set ON or OFF the averaging mode ON by default When on the measurements either displayed on the front panel display output on the analog output or on the RS 232 port is the result of the average of 5 sequential measurements This parameter is not saved and is lost when the system is switched off 3 4 3 Analog output The analog output parameters comprise the scale factor and the offset The scale factor corresponds to the physical unit per Volt unit V output while the offset corresponds to the physical value at which the user wants the analog output to be at zero volt For example one may desire to have 10 C V being offset at 5 C The analog output voltage is thus given by Temperature Voltage output x 10 C V 5 C To change the analog scale and offset for a specific channel first selec
21. sing the straight DB9 cable supplied Please refer to the Softsens User Manual or Opsens SCPI Serial Communication Manual Opsens Inc 20 IMP0047 v4 FieldSens User Manual doc
22. t the proper channel with the up and down KA buttons then press the confirmation button a Opsens Inc 10 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual Then navigate between the Scale and Offset values again with the up down and confirmation buttons Any new scale factor is saved in the non volatile memory This value is used whenever the system is switched on and off By default the offset value is 0 new offset value is not saved and it is lost when the system is switched off or when the sensor is de selected 3 4 4 Units The user can choose what are the units displayed for each given type of sensor For example temperature sensors type T1 Tm and Tq can have their measurements displayed in either Celsius or Fahrenheit This choice affects the values on the display on the analog output as well as the values sent by the serial port Note that when the units are changed the analog output scale usually needs to be adjusted For almost all sensor types the user can select between two kinds of physical units for outputting the data readings as indicated in the following table Sensor type Physical units 11 Standard Temperature Celsius C Fahrenheit F Tm Medical Temperature Celsius C Fahrenheit F Pm Medical Pressure mmHg Pv Absolute Linear Pressure vacuum mbar torr S1 Strain micro strain um um or pin pin pe NOTE changing the kind of physical units of a specific sensor type
23. ta will be lost In the Delete All submenu the screen presents a YES or NO option list use the Up O and Down 82 buttons to select Yes or NO and then press the Confirmation button amp to lock down the new value selected 6 3 During an acquisition During an acquisition procedure either generated from the FieldSens front panel or from a computer using Opsens SoftSens application the menu options on FieldSens front panel display will be limited in access The DIAGNOSTICS menu will be accessible so that the system s performance parameters can be monitored during an acquisition procedure The SETTING menus will not be accessible so that measurement configurations cannot be modified during an acquisition procedure The following message will appear Measure Meas Acquisition ACQ is running Press Menu to Exit The MEMORY menu will be accessible but only to Stop an ongoing acquisition procedure that was generated from the FieldSens instrument or from the SoftSens application for an internal memory acquisition procedure If the ongoing acquisition procedure was generated using SoftSens for a live data download to the computer then the acquisition procedure will need to be stopped from the computer using the SoftSens application 6 4 Acquisition file retrieval Acquisition file retrieval can either be done using Opsens SoftSens application or a communication terminal using SCPI commands on a computer connected to the FieldSens u
24. will affect all the defined sensors of that type 3 4 5 Communications In the Communications submenu the user can choose between RS 232 and RS 485 port 3 4 6 Special This submenu contains two special functions Unit Mode and No Signal Opsens Inc 11 IMP0047 v4 FieldSens User Manual doc FieldSens User Manual The unit mode setting overrides the display in physical units and gives a reading of the optical path difference of the sensors instead This is a specialized command that should be used only when properly instructed by Opsens personnel There are certain circumstances i e some remote control programs where it is not desirable to display a No Signal when a sensor is unconnected or defective Hence the No Signal message can be enabled or disabled This choice affects the values on the display on the analog output as well as the values sent by the serial port Both these settings are not saved and are lost when the system is switched off 3 5 Diagnostic Submenu The user can look through a variety of internal parameters for each optical channel This can be used to diagnostic potential problems with the system or a specific sensor Typical diagnostic parameters are shown below Diagnostic values can be refreshed by pressing the confirmation button The channel number can be changed with the up amp and down buttons Parameters Description Lg 2 6V volt Light level Ga 1 3 no u

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