MAN-096 Vibrating Wire Temperature Logger
Contents
1. 1 4 and SAVE All readings in the log will be converted to the selected units as they being are transmitted irrespective of the units selected at the time they were originally saved Temperature readings are transmitted in the units selected in the respective channel of the Transducer Table NOTE The Logger stores all Vibrating Wire readings in Period units but converts them to either engineering or linear units for display purposes if the Transducer Table and Function O are appropriately set Temperature readings are stored in the units selected in the Transducer Table The following prompt will appear when the units of transmission are selected by pressing SAVE READY TO DUMP LOG PRESS 1 TO START Pressing 1 starts the transmission DUMPING LOG PRESS FUNCTION TO ABORT User Manual 12 The alternative TABLE DUMP being selected with T or 1 The selection is confirmed with SAVE The following prompt will appear for TABLE DUMP READY TO DUMP TABLE PRESS 1 TO START Pressing 1 will start the transmission DUMPING TABLE PRESS FUNCTION TO ABORT Pressing FN will abort any data transmission The RS 232 C serial port has a hardware handshake which if inactive for more than 2 seconds will abort the dump and the display will read COMMUNICATION FAULT User Manual 13 Section 8 Other Functions 8 01 Function O Set Display Units This function allows the2. ASCII data format and press Enter type in the file name for the transferred data including the path if required and press Enter The computer is now waiting for the data to be sent from the logger Perform the logger download sequence When all the data has been transferred press ESC to end the transfer and press ALT X to leave PC PLUS Help is available by pressing ALT H Terminal Under Windows the program Terminal is supplied in the Accessories group Double click on the Terminal icon and choose the appropriate serial port Select settings from the menu and choose communications The window will allow you to select the communication parameters compatible with those set on the logger Once selected click on OK Before starting the logger download select Transfer from the windows menu and click on Receive Text File Enter a file name and choose the destination of the file ensure the file name has a TXT suffix and click on OK The software is now waiting to receive the logger data User Manual 23 Appendix B Calibration Constants K and Transducer Table The basic working principle of all vibrating wire transducers is that they contain a wire held in tension between a fixed anchor in the instrument body and a flexible diaphragm or support The pressure or displacement to be measured by the sensor is determined by the tension in the wire The diaphragm or supported end of the w
3. Engineering units by use of an equation in the form 107 7 P K e N Where P value in Engineering Units K Gauge Factor No the zero reading in period units x10 Ng current reading in period units x10 In certain circumstances it may be necessary to convert the Gauge Factors Calibration Constants supplied with the transducers to units of measurement more appropriate to the individual site NOTE Worked examples of the use of Gauge Factors Calibration Constants are given in appendix 1 User Manual The Logger requires the Base readings instrument zero to be entered into the Transducer Table in Period units and ideally these should be taken using the Logger itself in Read Only Mode Care must be taken with these zero readings as all subsequent data reduction is related to them The sequence of key presses to enter Transducer Specific data into the Transducer Table are best illustrated by example INSTRUMENT 5 bar V W Piezometer Gauge Factor MH20 Base Reading Period x 107 190 1002 4101 To enter these data in the transducer table proceed as follows i Select function 4 press FN and 4 ii Select the required channel eg 100 Use 0 9 or 1 4 keys and SAVE iii Select the transducer type V Wire or Temp by using T 4 keys and SAVE If V Wire transducer selected enter the following iv Enter the gauge factor Calibration Constant Use 0 9 and decimal point
4. User Manual 24 No Zero reading in Period units x 10 N Full range reading in Period units x 10 This Calibration Constant or K Factor is used to convert data measured in Period units to display in Engineering units Each transducer will have a different Calibration Constant K The Vibrating Wire Temperature Logger will automatically carry out this conversion for the user if the correct K factor and base reading are entered into the Transducer Table NOTE To convert a Calibration Constant K to alternative engineering units it is only necessary to calculate the equivalent full range of the transducer in the new units and apply this as a conversion factor for the Calibration Constant Sometimes it is more convenient to work in LINEAR units frequency x 10 and the corresponding equations are then P K No Ni x 10 K R x 10 No 7 N Where P Applied Pressure N Zero Pressure reading in frequency x 10 Ni Reading corresponding to P in frequency x 10 R Calibrated Instrument Range in the appropriate units No Zero reading in frequency x 20 N Full range reading in frequency x10 Vibrating wire transducers supplied by Soil Instruments Ltd are supplied with a Works Calibration Data sheet detailing this information together with the Calibration Constant K in the most commonly used engineering units A typical calibration sheet appears on Page 29 scil INSTRUMENTS Bell Lane Uckf
5. a Table must be completed for each Transducer to be monitored Some instruments such as load cells may incorporate more than one transducer assembly in this case the table can be set up to record an average of the set Separate channels are required to read Temperature and Vibrating Wire data from the same Transducer The actual procedure for saving readings is very straight forward requiring only the selection of the correct channel and the saving of the reading with the SAVE button Obviously for valid data the Transducer Table must be correctly set up 6 01 Function 4 Transducer Table The parameters required in the transducer table are i Channel No ii Transducer Type iii Gauge Factor Calibration Constant iv Base reading v No of Ch to Av vi Units Entries in the Transducer Table are made with the 0 9 keys directly or with the 1 and 4 keys using SAVE to store the selection 999 individual channels are available in the table Details of the Gauge Factor Calibration Constant can be obtained from the data sheets or similar supplied with the vibrating wire transducers NOTE The logger requires that the Gauge Factor Calibration Constant is entered specifically for the units appropriate to the units to be displayed The units available are us dg arc Rads deg F deg C Tons kips tonnes KN ins ft mm m KN m KPa mPa mmHg mHgG psi ftH O mH O Kg cm and bar The logger converts Period readings to
6. clear by pressing key 1 PRESS 1 TO CLEAR LOG ANY OTHER KEY TO ABORT User Ma 15 Any other key aborts the function 8 04 Function 5 Set Clock To set the Logger s internal clock for the local date and time After selecting this function the user is prompted to enter the date and time Use T and 4 with SAVE to enter the required values 8 05 Function 6 Serial This enables the user to define the communication parameters used by the logger during its DUMP routine After selecting this function FN 6 the following is displayed SERIAL BAUD RATE 9600 The T and 4 keys will scroll through the available options 9600 4800 2400 1200 600 300 110 SAVE will store the selected baud rate and move onto SERIAL PARITY NONE The options here are NONE ODD EVEN Similarly SAVE moves to User Manual 16 SERIAL DATA BITS 8 The only alternative being 7 Pressing SAVE to store the selected value displays SERIAL STOP BITS 1 The only alternative value is 2 Pressing SAVE stores the value and returns to the initial display NOTE Most communications problems can be traced to faulty or incorrectly connected RS 232 C serial leads particularly when using adaptors Obviously the serial parameters of the Logger and the computer s software must be matched 8 06 Function 7 Status Selecting this function produces a display similar to the foll
7. serial port has a hardware handshake which if inactive for more than 2 seconds will abort the dump and the display will read COMMUNICATION FAULT ERE gl RE Go re oa E E EE Check Baud Rate setting using FN 6 G Check the flylead connections 2 Use the Audio FN 9 to listen to a V W signal ring The signal should produce a clear 1 Clean and dry flylead connections 2 Check the Channel No selected is set Up correctly 1 Check the flylead connections 2 Check selected channel table is set up correctly for connected instrument 21 Section 12 specification and Compatibility The following is the hardware specification of the Readout Logger unit EE Microprocessor 16 Bit CMOS chip V25 with sleep mode Display 2 line 24 character low power dot matrix i quia crystal display with LED backlight p I NN Keypad Dustproof waterproof 16 key tactile response i embossed polycarbonate membrane with i audio feedback Data Storage Battery Backed CMOS RAM enabling storage of i j 12000 readings minimum EELER Communications Interface RS 232 C Serial port with 75 to 9600 baud j and hardware handshaking Resolution Software Dependant j Version 1 18 amp 1 2 P
8. ISO 9002 approved procedures and unless otherwise indicated performs within 0 10 as specified Thus conforms in all respects to our relevant specifications and drawings elle LR Line Manager for Soil Instruments Itd User Manual 26 Appendix D Vibrating Wire Data Units Explained 1 Frequency Units The tension of a wire can be measured by registering the frequency note at which it naturally vibrates If the wire is plucked electronically the frequency at which it vibrates can be measured The most common units used to express frequency are Hertz Hz or Kilo Hertz KHz The disadvantage of these units is that there is no linear conversion from Hertz to change in wire tension 2 Linear Units In order to overcome the problem of a linear conversion described above the frequency value can be squared thereby rendering it linear but quite large To reduce its size it is often divided by 1000 or multiplied by 10 The expression f 1000 or f x 10 is the most commonly adopted as a linear digital output 3 Period Units Electronic devices and digital technology often utilise the counter function available in some common circuits Period Units represent the time taken for the wire to vibrate 100 times expressed in seconds Due to the very small size of the number generated most equipment manufacturers display the unit multiplied by 10000000 107 The relationship between Period Units and frequency units is expresse
9. MEMORY LOSS The CMOS ram in Soil Instruments portable loggers is maintained when the logger is turned off by the main rechargeable battery or if this battery becomes exhausted by a small on board back up battery From a fully charged state these two batteries will maintain the logger s memory including its calibration values for several months Therefore to ensure that calibration constants and data are not lost we recommend that the logger is recharged once a month even when not in use User Manual 20 Section 11 The following table offers the operator some assistance with fault finding whilst in the field EE The Logger fails to respond when the On Off button is pressed The Dump operation fails pcc c c ELEC Random characters dumped rather than good data Reading fluctuates Temperature reading differs greatly from expected value VW reading differs greatly from expected value If the problem persists contact a Technical Support Engineer at Soil Instruments Ltd England User Manual Troubleshooting d the battery has totally discharged it needs to be fully recharged Do not overcharge the battery SR Check the Serial FN 6 parameters are as those set up on the computer B Check that communication cable is attached to the correct port on the j computer 3 Check that the computer software is set up correctly 4 The RS 232 C
10. above The procedure is repeated for all sensors in the instrument which will result in the Logger automatically returning to the first channel of the set CHN 100A 16 0 bar AVERAGE READING Saving this reading will store the average in the log User Manual 11 INFORMATION Only engineering units can be averaged Temperature readings cannot be included in the averaging function 7 01 Function 2 Dump This allows either the Log of readings or the Transducer Table to be downloaded to a computer equipped with suitable software via an RS 232 C serial connection Data is stored in the Logger in ASCII format and is easily received by communications packages such as Procomm t and Terminal in Windows see also function 6 serial parameters and appendix and manipulated by spreadsheet packages such as Lotus 1 2 3 Alternatively the Soil Instruments Ltd Data Management Package WINSID is available which is a flexible data presentation package and able to receive data directly from the Logger allowing sorting and processing of the data for storage and output in graphical or printed format To initiate the downloading operation select Function 2 FN 2 which displays the prompt SELECT gt LOG DUMP Selecting LOG DUMP by pressing SAVE displays the prompt DUMP LOG IN ENGINEERING UNITS The alternative units in which the data can be downloaded PERIOD UNITS or LINEAR UNITS are selected using
11. and SAVE v Enter the base reading minimum 1000 Use 0 9 and SAVE vi Enter No of channels to average Use 0 9 and SAVE For most instruments enter 1 but where the instrument is fitted with a number oftransducers eg Load Cell enter the appropriate number of gauges Only Engineering Units will be averaged by the Logger For most instruments enter 1 but where the instrument is fitted with a number of transducers e g Load Cell enter the appropriate number of transducers Only Engineering units will be averaged by the Logger vii Select the engineering units appropriate to the gauge factor Calibration Constant entered Use 1 4 and SAVE If temperature transducer selected enter the following Select the temperature units required Using T 4 and SAVE NOTE Having completed table data entry return to normal display by use of the FN key Select appropriate channel eg 100 using 0 9 and 1 4 keys User Manual 10 Section 7 Taking Readings The Sensor socket on the front panel of the Logger is a four way Lemo with pins 1 and 2 dedicated to Vibrating Wire readings and pins 3 and 4 dedicated to Temperature sensor readings A flylead supplied with the logger is fitted with 4 crocodile clips for connection to instrument cables The Red and Black clips are for connection to the Vibrating Wire Sensor and the Blue and White clips are for connection to the Temperature sensor The Logger records Temperature senso
12. ck light Function 8 to drain the batter This should be performed at least once every 30 or 40 charge discharge cycles 9 01 Charging Procedure Plug the flylead from the battery charger into the socket marked Battery Charger on the Logger front panel where applicable Ensure that the connection of the flylead to the battery charger is correct i e red to red and black to black Connect the battery charger to a suitable a c mains supply where applicable switch on the charger and both LEDs on the charger should illuminate User Manual 19 Section 10 Care and Maintenance The Vibrating Wire Temperature Logger is a precise measuring instrument designed to operate consistently under normal field conditions when treated with reasonable care Although the components in the unit are relatively robust for such conditions they will not survive mishandling or neglect Treat all items with respect and handle with care Ensure that the Logger is protected from shock during transit If loose transport on a seat in the vehicle cab or secure firmly to vehicle body If the conditions are very rough the best solution is to carry the instrument during transit This will damp the shocks Keep the Logger battery fully charged using only the charger supplied Wipe the front panel after use Do not allow sharp objects to damage the membrane front panel Do not expose the Logger to temperatures outside the range of 20 to 70 C 10 01
13. d as P 1 Period units are therefore convenient to measure but do not have a linear relationship to change in wire tension Calibration Constants Each instrument is supplied with a Calibration Constant value to convert the raw data into engineering units The value of the calibration constant will vary depending upon the engineering units into which the data is to be converted and the readout units For example the data from piezometers may convert into Kg cm mH 0 Bar Psi etc and therefore the Calibration Constant for each will be different Some instruments have Generic Calibration Constants and others are calibrated to generate the Constant The constant is generated by using the following calculation Constant K Range Reading full Range Reading Range Zero User Manual 27
14. d of approximately 15 hours However this is reduced to 4 hours if the back light is used continuously The battery is normally charged overnight immediately after using the instrument Charging should always be carried out before storing the Logger for any length of time Battery shelf life period after which capacity has fallen to 60 of its original fully charged level is temperature dependent As a guide Temperature Shelf Life 0 degrees C 120 days 20 degrees C 40 days 40 degrees C 20 days Also note that battery life period after which only 60 of the stated capacity is obtainable is greater than 5 years The battery charger is capable of charging the nickel cadmium battery at a constant current of 200 mA Charging of a completely exhausted battery battery voltage 10 0 V or less will take about 14 hours During charging you should ensure that the ambient temperature is in the range 10 to 45 degrees Centigrade The battery has a typical life of 700 full charge discharge cycles NOTE Long term use of the battery pack without allowing it to completely discharge will cause a loss of capacity this is due to the inherent memory of nickel cadmium cells This effect can be limited by periodically allowing the battery pack to discharge to the point where the instrument will no longer operate Since the unit will automatically shut down after 15 minutes it will be necessary to repeatedly switch the unit back on and re activate the ba
15. e ON OFF Key is pressed C Increments selected value or scrolls UP Log and Menu Options C Lowers selected value or scrolls DOWN Log and Menu Options FN Function toggle to enter or leave Function Mode Possible functions are O0 Select display units 1 Read Log 2 Dump either Log or Table to RS 232 Serial Port 3 Clear Log 4 Modify Table 5 Set Clock Calendar 6 Set RS 232 C Serial Port Parameters baud rate etc 7 Battery Status and Log Status 8 Backlight control OFF ON 9 Audio control OFF ON SAVE In Read Mode saves the instrument reading to the Log In Function Mode saves the displayed option C In Read Mode selects Adjust Volume In Function Mode enters decimal point NOTE Keys A B C amp D are not connected on this Logger model User Manual 6 Section 5 Operational Modes 5 01 Switch On When the Logger is first switched on the following message appears briefly SIL Portable Data Logger VWTDL Version 1 1 To be followed by a display similar to CHN 001 PERIOD 5473 11 04 97 16 22 03 This displays the channel number last selected when the logger was switched off the date and time set in the Logger s clock and the reading of a transducer connected to the logger in the units previously selected 5 02 Read Only Mode This is automatically entered when the ON OFF button is first pressed The Logger will automatically pluck a connected vibrating wire
16. e information may be stored for up to a maximum of 999 gauges which are identified by channel numbers in the range 001 999 For each identified Vibrating Wire gauge the following information is stored in the Transducer Table i Calibration Constant K ii Base reading in PERIOD units iii Appropriate Engineering units selected from a predefined list Facilities for storing at least 12000 measurements in the form of a Log Log entries are battery backed Each Vibrating Wire measurement in the Log includes the following stored information i Channel number ii The stored value displayed as selected iii Log entry sequence number iv The date and time stamp Measurements are sequentially stored in the Log with the most recent given the highest sequence number If more than 12000 measurements are saved then the earliest saved measurements are lost Facilities for downloading the contents of either the Log or the Transducer Table to a computer via an RS 232 C serial connection User Manual Section 3 Equipment Supplied Portable Vibrating Wire Temperature Logger is housed in a strong metal case with hinged sealed lid and carrying handle The Logger incorporates a sealed membrane panel with a tactile keyboard 2 line 24 character alphanumeric liquid crystal display and sockets for flyleads Dimensions 320 x 190 x 135mm Weight 4 kg Set of three flyleads a 2m long Sensor Flylead Logger crocodile clips
17. eriod and Linear Units 1 Unit Version 1 3 onwards Period and Linear Units 0 1 Unit salle ae SEER RR IR RR EE Ee Operating Temperature Range 20 to 70 C MM ee j Battery Life 15 hours continuous use without use of the backlight and audio functions irme m IC I EU mM Dimensions 320mm x 200mm x 135mm Le Geer Weight 4kg EH 12 01 Compatibility The Vibrating Wire Temperature Readout Logger is compatible with all types of Vibrating Wire instrument that can be monitored using the Pluck principal and thermistors to the specification below R T curved matched thermistor range 809 to 41509 C 3000 ohms 25 C Tolerance 0 29 C in the range 0 C to 70 C User Manual 22 Appendix A Communication Software To assist the user details of 2 examples of download communications software are given below 1 P C PLUS This powerful communications software package can be used to communicate with the logger and receive downloaded data Once installed on a computer and the necessary downloading cable is attached the software is accessed by typing PC PLUS from the relevant directory and pressing Enter Press ALT P to set up the Line Port parameters These should match those selected on the logger Function 6 Once set press ALT S to save the settings To ready the computer to receive downloaded data from the logger press the PgDn Page Down key enter 4 for
18. es o o e EHE p Obr ead poe Ree Era nae RETO Ee Ad nd e 15 Function S Set el EE 16 Function 6 Serial s erede ise tete re re EE 16 Sie gien z Status urea TE 17 Function 8 LIGNE eee etd epu eg dae baee a de etude Deed dea 17 Function 9 Audio ehe oet eater n esie ei ies 17 Charging the Battery EENS 19 Charging Eeer 19 Care and Maintenance elei ies eiie seien ENEE nnne nnn tn nhan nnns ennnen snas assa ENEE nasa sa nanenane na 20 MEMORY LOSS 3 m aub tite iei ten Iisdem nrbe ecc eios e Libres 20 e TE ed LW 21 Specification and Compatibility elei eee eee en enne nennen nnnm nnn nn nna 22 Compatibility xx oae esie td Nt eet Hired 22 Communication Software elei eee eeeee sense en nenas nnne nnns anth nass annann anene mnene 23 Calibration Constants K and Transducer Table esses 24 Vibrating Wire Instrument Calibration Certificate ssuus 26 Vibrating Wire Data Units Explained eese 27 Section 1 Forward Soil Instruments Vibrating Wire Temperature Logger as with all our readout equipment has been designed to operate consistently in a construction site environment and is therefore relatively robust However it is essential that the equipment covered by this manual is both operated and maintained by competent and suitably qualified personnel They m
19. ield East Sussex t 44 0 1825 765044 e info itmsoil com TN22 1QL United Kingdom f 44 0 1825 744398 w www itmsoil com Soil Instruments Ltd Registered in England Number 07960087 Registered Office 5th Floor 24 Old Bond Street London W1S 4AW User Manual Appendix C Vibrating Wire Instrument Calibration Certificate Instrument Type Piezometer Serial No 10 9768 4W Pressure Range Oto 10 Bar Client Project WORKS CALIBRATION DATA Calibration Equipment BUDENBERG DEADWEIGHT TESTER TYPE Serial No 19462 VIBRATING WIRE READOUT UNIT Serial No E 037 Date of Calibration 27 11 96 Gauge Constant bar K 41 4244 Ambient Temperature 22 C Gauge Constant kgf cm K 41 2404 Barometric Pressure 1010 mBar Gauge Constant kPa K 4142 4426 Works File No A45 Gauge Constant mH50 K 423 1505 Calibrated By S G FULLER Gauge Constant p s i K 600 8198 Note The zero reading should be established on site by user prior to installation PIEZOMETER CALIBRATION Pressure Calculated Full Scale Bar Reading Error 0 00 0 0000 0 0000 1 00 0 9982 0 0190 2 00 1 9956 0 0440 3 00 2 9994 0 0060 4 00 3 9918 0 0820 5 00 4 9907 0 0930 6 00 5 9985 0 0160 7 00 6 9974 0 0270 8 00 7 9992 0 0080 9 00 9 0032 0 0310 10 00 10 0000 0 0000 Soil Instruments Itd certifies that the instrument detailed hereon has as applicable been inspected tested and calibrated in accordance with
20. ire is subjected to changes in loading generated by the changes to be measured e g water pressure in piezometer change in length in strain gauges The materials and techniques employed during manufacture ensure that the relationship between tension in the wire and physical property to be measured can be treated as linear over the working range of the transducer The transducer contains an electromagnetic coil assembly mounted in such a way as to excite the wire when it is supplied with a current from a readout logger The coil also serves as the pickup to allow the Logger to measure the frequency of the vibrating wire in response to this pluck excitation Where necessary transducers are individually calibrated to determine the response to applied force The relationship between frequency at which the wire vibrates and its tension is complex but can be represented mathematically by the equation f kxi1L Where f frequency of oscillation L length of the wire k a constant determined by the physical properties of the wire It can be shown that TE m CAN NP o Where P Applied Physical property No Zero Pressure reading in Period units x 10 Ni Current Reading in Period units x 107 Rearranging the equation as follows allows the determination of the Calibration Constant K from the calibration readings R 10 10 IIS e ae o r Where R Calibrated Instrument Range in the appropriate units
21. owing LOG 05642 USED 11824 FREE BATTERY VOLTS 12 8 This gives the number of log entries used and the free entries remaining The condition of charge of the battery in volts is displayed 11 8V is the absolute minimum for use but in excess of 12 5V is required before starting intensive use 8 07 Function 8 Light Selecting this option allows the user to switch the LCD Backlight ON or OFF using 1 and J keys followed by SAVE to select NOTE Continuous use of the backlight severely drains the battery reducing continuous usage of the Logger to about 4 hours with a fully charged battery 8 08 Function 9 Audio The logger incorporates a loudspeaker so it is possible to have an audio reproduction of the note resulting from the plucking of the vibrating wire in the instrument Audio ON or OFF is selected by T and Y keys followed by SAVE User Manual 17 NOTE Continuous use of the audio also severely drains the battery cutting continuous usage of the Logger to about 4 hours with a fully charged battery IMPORTANT The combined use of the backlight and the audio function will exhaust a fully charged battery even more rapidly cutting continuous use to about 2 hours User Manual 18 Section 9 Charging the Battery The Vibrating Wire Temperature Logger is powered by a rechargeable Nickel Cadmium battery pack housed within the instrument carrying case A fully charged battery has a continuous working perio
22. r readings in the same manner as it does the Vibrating Wire sensor readings and a Temperature sensor must be given a dedicated channel separate from the Vibrating Wire sensor channel To assist with reading transducers it is preferable to dedicate consecutive channels to the Vibrating Wire sensor and it s Temperature sensor To simply take a reading from an instrument and not to store the value in the log switch on the Logger Use O to 9 T and 4 to select the correct channel number and once the instrument is connected to the logger a reading will be continuously displayed in the units selected This reading is updated every 2 seconds To store readings in the log select the channel number required using O to 9 or 1 and J and when the transducer is connected watch the reading displayed for a few seconds to ensure the reading is stable before storing it by pressing SAVE The Logger s internal clock will date and time stamp the reading automatically When reading an instrument with multiple Vibrating Wire sensors and the Transducer Table set to average channels reading the first channel of the set will result in a display similar to CHN 100A 15 7 bar 14 04 97 12 30 00 Saving this reading by pressing SAVE automatically increments the display to the next channel of the averaging set CHN 101A 16 2bar AVERAGING 12 32 00 Once the appropriate sensor has been connected this reading can be saved to the log as
23. scil Vibrating Wire Temperature Logger Model 1050 User Manual Man096 2 0 2 04 08 2014 C Spalton Chris Chris i i Rasmussen Rasmussen Manual No Revision Date Originator Checked Authorised for j j Issue j User Manual 1 Contents Section 1 Section 2 Section 3 Section 4 Section 5 5 01 5 02 5 03 Section 6 6 01 Section 7 7 01 Section 8 8 01 8 02 8 03 8 04 8 05 8 06 8 07 8 08 Section 9 9 01 Section 10 10 01 Section 11 Section 12 12 01 Appendix A Appendix B Appendix C Appendix D User Manual gll d EE 3 d ee Te d Le m 4 Equipment Supplied eee ee EE ee ENEE EE 5 User Interface Overview 4eeeeeeieeeieee esee nennen nenne ENEE natn unas annann anmannan ennnen 6 Operational Modes ui oae er ee doe erue eee aec cr eed acera ire doe Idi 7 SWItGCIY QE iic tenet hn conte etit ien ceti Gea ee bd e eet eet tit esca 7 Read Only Mode 3 meia eoe eit idein iter EET hd ERE Fees 7 FUNCTION auc EN 8 Setting The OH Le IER 9 Function 4 Transducer Table 9 Taking Readings uuuuaenisuiecdie ni eiee SOERENSEN eaa 11 PUPIGELOMEZ DIU ag eea rt 12 Other Functions n ee ence ec oves so EES eaten cents 14 Function O Set Display Units enne ener nnne nnne rns nnne nnne 14 Function 1 Read E09 1 eH RH n ia ce E EE eae Pe ELE b PERPE ERLE ian aed 14 Function 3 Clear Cog Entri
24. sensor at approximately 2 second intervals and display its measurement If a channel dedicated to temperature is selected then a temperature measurement will be displayed Function 9 can be used to listen to a reproduction of the sound of the wire as it vibrates press FN 9 This is used to check the clarity and integrity of a Vibrating Wire sensor signal The display will indicate VW readings in PERIOD LINEAR or ENGINEERING units the required units being chosen by the use of Function 0 Press FN and O Temperature readings are displayed in OHMS or ENGINEERING units as selected in the transducer table IMPORTANT if the channel number is not displayed when the logger is switched on then chn 000 has been selected Chn 000 is not a dedicated channel number Use 7 to move to another channel User Manual 5 03 Function Menu Functions are directly selected by pressing FN key followed by a digit 0 9 The FN key followed by T or 4 will allow the viewing of the possible functions and then the appropriate digit will select The ten possible functions are grouped into four displays as follows DISPLAY 0 DISPLAY UNITS LOG FUNCTIONS 1 READ 2 DUMP 3 CLEAR CONFIGURATION 4 TABLE 5 CLOCK 6 SERIAL SYSTEM 7 STATUS 8 LIGHT 9 AUDIO To revert to the read mode press the FN key again User Manual Section 6 Setting up the Logger Unless PERIOD units alone are required
25. tains data recorded on more than one date the user is prompted to select the date of the data to display LOG ENTRY DATE 26 03 97 PRESS SAVE TO SELECT User Manual 14 The default date shown is the latest date in the Log The T and 4 keys will then move up and down the Log by date If the Log contains only one date then the above prompt does not appear The Log display is identical to Initial Display except that a Log Index number appears on line 2 of the display for example CHN 001 5717 PERIOD 50 14 04 97 08 50 40 8 03 Function 3 Clear Log Entries If no readings have been saved the message LOG EMPTY is shown on the display If the Log contains readings taken on more than one date the user is prompted for either an ALL or PARTIAL clear CLEAR LOG 1 ALL 2 PARTIAL Press either keys 1 or 2 to select the option If PARTIAL clear is selected the user is prompted to select the dates bounding the partial clear The display shows CLEAR LOG FROM 26 03 97 The default date shown is the earliest date in the Log The T and Y keys move through the Log by date The SAVE key then selects the clear FROM date and the display shows CLEAR LOG FROM 26 03 97 TO 14 04 97 The default TO date is the latest date in the Log Again the T and 4 keys move through the Log by date and the SAVE key selects the clear TO date The user is prompted to confirm the
26. to connect directly onto sensor cable b 2m long Terminal Flylead Logger 4 pin Lemo plug to connect Logger to Soil Instruments terminal systems C 2m long Serial Port Flylead Logger 25 way D connector to connect Logger to computer Weight of flylead set 0 6 kg Battery Charger The battery charger supplied is designed to charge the nickel cadmium cells which power the Logger Other types of charger must not be used The charger is housed in a plug in plastic case complete with flylead to connect to the front panel of the Logger The location of the end user will determine whether a 115V or 230V A C 10 volts version is supplied with the logger Dimensions 105 x 80 x 180mm Weight 2 2 kg User Manual Section 4 User Interface Overview The Vibrating Wire Temperature Logger user interface consists of a two line 24 character alphanumeric Liquid Crystal Display LCD and a hexadecimal keypad with the following assignments EE EE DEE A 7 8 9 ON OF b b 4 F 4 B 4 5 6 f c 1 2 3 i D 0 SAVE FN When the logger operates in either the Read mode or the Function mode the Keys facilitate various functions as detailed below ON OFF Power toggle The instrument will automatically shut down if no key is pressed within a 5 minute period The channel number last selected before the logger shuts down is Automatically selected when th
27. user to select the units in which the data are displayed as the readings are taken Selecting this function results in a display similar to the following SET V W DISPLAY TO PERIOD UNITS The alternative display units ENGINEERING or LINEAR UNITS are selected with the T or 4 keys and SAVE to select When PERIOD UNITS are selected the displayed value is the period of time in seconds x 107 that the vibrating wire takes to oscillate 100 times to a resolution of 0 1 When LINEAR UNITS are selected the displayed value is frequency2 1000 units to a resolution of 0 1 When ENGINEERING UNITS are selected the displayed value is a function of the BASE READING and GAUGE FACTOR Calibration Constant which are stored in the Transducer Table for the CURRENTLY SELECTED CHANNEL NOTE If the Transducer Table parameters have not been entered for the currently selected channel LINEAR UNITS are displayed TEMPERATURE readings are always displayed in the units selected in the appropriate channel of the Transducer Table INFORMATION If PASSWORD appears on display press SAVE which will bypass this requirement and return you to the reading display The password is Soil Instruments protected and used for entry of calibration figures only 8 02 Function 1 Read Log Selecting this function when no data is stored in the loggers memory results in the display showing LOG EMPTY The display then reverts to the initial display If the Log con
28. ust READ AND UNDERSTAND the procedures outlined in this manual before attempting installation or operation of the equipment on site Soil Instruments Ltd will not accept for repair under guarantee instruments that have been neglected or mishandled in any way User Manual Section 2 Introduction The Vibrating Wire Temperature Logger is suitable for reading most types of commercially available vibrating wire instruments requiring a plucked excitation signal It is an intelligent battery powered portable readout logger utilising 16 BIT microprocessor technology and support circuitry Circuitry to measure temperature using temperature sensitive resistors Thermistors or Thermocouples allows the simultaneous reading logging of temperature data from temperature sensors incorporated in vibrating wire transducers The CMOS design incorporates sleep modes to reduce power consumption and large memory address space to minimise constraints on both programme and data storage It also provides the following features a b C d e f g h Vibrating Wire Measurements may be made and displayed as either a PERIOD reading a LINEAR 1000 reading or suitable ENGINEERING units The Temperature measurements may be made and displayed in OHMS or in ENGINEERING units Conversion from PERIOD units to ENGINEERING units using conversion factors stored in a battery backed Transducer Table set up by the user Transducer Tabl
Download Pdf Manuals
Related Search