Vu User Manual
Contents
1. Ry DATA HARVEST Koos 0 EASYSENSE Vu Reference Manual EASYSENSE Vu Reference Manual DO241 1 CONTENTS WVIAES SUD DIGG crana qnuecine piaans van OA ar 3 Getting to know your Vu data lOQQED cccecccceccceecceeeeceeeeeeeeseeeeseeeeeeessueesaees 3 Charging aeon a dace tdtahrandusicetnie cane en teanaeeteeatens 3 The EASYSENSE VU datas loggel ccccccseccececseeceeeecseecaeeecseeseeeeceeesaeeenes 4 VUDU enaa lek tag age ee eae Reha tate eat eet tat Rotel eae 4 SENSO eE eC ee nee ee ee 5 AS BUIN SENSO S saitiicses eee diaieeite acting cates A 5 Tne plag IN SENSO Sore a ees tet ehe eek snd 6 Changing a sensor s range or turning a Sensor ON OF Off cccecceeeeeeeeeeees 6 Ways O Capture da WIIN VU see rected ws tied aces eee arcades ecunieed ead dee T Using Vu standalone without a computer cece ceccceeeeceeeceeeeeeeeeeseeseeesaees 7 MEIST oiron A adele women eR ae 8 PICO Ii sta attet e a a a Soot eet eager 8 E ASVO G esas uaus baid a Aa a NE al O 10 SNADNO aca a E a Meaboocemeae os nabioaenbentn 11 LOO revere a E atte re anrce trennC ae nate nr ener Eee ett eee anne re 12 OUTING asenu aes ioe rhe Sete nad acetone cetec edu aant Pastngnanteaetts 15 PRO VICW ena E EE E suibeiaukanieSp ate snes 16 VS a EART cede sates rience soe opcode ound seeds E waco AE A 17 SO WILCI OOM ertuchtce stay edu a edie an Mute Rie dh oaae 17 Sensor changing range or turning ON OF Off2. ccccceccseeeeeeeeeeeeeeeeees 17 PP UUIROS G eaaa a tanta Muha ner tiaee eyathaee Set Shieh meats 18 Language aces rend onaub E ance seccen emacs O Oa 18 DAG OVE Sveti tie sedan pein s Jace ceca a ier anata ee taproot 18 WSCA Sits inch Gao sestnah actesenuetente wagnetae aG 19 Using Vu connected to a computer for the first time cccceeeeeeeeeeeeeeees 19 Using Vu after the initial setup sicseete ance nodes teres diet cet vari meveeacsinceden Maced eee 20 The EasySense Software OVErVICW ccccceccccececeseeceeeceeeeeeecaeeeeaeecueeseeesaaes 20 TOCHIMICAl ATOR MAUON sess aT a A 23 Selecting the sensor range ccceecccesccseeeceeeceeeeceeecsueeceeeeeeeseuesageeseeessuees 23 P werng V cud e EE ae EE e E Ea Ra i O 23 BAGI Suaia Glad uta a a a a 24 AWO SWEN Ol araar a O 24 Internal Clock and Calende l cccccccccececeeeeeeeeceeeeeeeeseneeseeseeeeseeeseeeeees 25 VUS MEMO aeriana a EEE a a oaia 25 PUG CNS lanyard a ae EE 25 Hardi RESO Uciscccasaet heen e a a aa a a es 25 DS CMS AU ON Soruna T 26 Gale amp Mantena e 2 2 ca peterten fea cca Apel aude ceneraceehiera tetas Ceiesl eek tou ttt cnawts 27 Updating EASYSENSE Vu s Firmware c cccccsecceeeeeeeeeeeeeseeeeeeeesaeeeseeees 27 Practical information for Vu s plug in Temperature Sensor ccceeeee eee 28 Waran orae a a E ere ee ee 29 Copyright all rights reserved This manual may be copied for use within the premises
3. The logger is now set up for remote logging Click on OK Vu can now be disconnected from the computer and placed in its recording position The recording will start when the start condition you have selected is met and stop when the selected time span has passed Note If you want to stop a recording before it has finished press the stop IJ button and follow the instructions on the display B gt Retrieve Remote Use this option to retrieve a data set stored in Vu s memory e A dialogue box will open showing the list of data sets maximum of 6 currently stored in Vu The most recent data set is first in the list Select the required set of data and click on Retrieve Collect Remote Data Date Time Type Description 22 May 2012 16 00 18 Analogue 22 May 2012 15 56 00 Analogue 22 May 2012 15 51 05 Time at A 22 May 2012 15 50 50 Counting at 4 22 May 2012 15 50 37 Snapshot ee May 2012 15 50 21 EasyLog Erase the Data set from the Logger after Retrieve Retrieve Cancel Notes e When the maximum of 6 data sets is exceeded the next set of data will replace the oldest set e Ifthe Erase data box is ticked the set of data selected will be erased from the logger after retrieval Technical information Selecting the sensor range Some of the internal sensors in Vu and some plug in Vu sensors have more than one range Once a range has been selected it will be used until reselected The range of a sensor can be
4. 0 1k Ix Use the up or down buttons A W to scroll the list until the cursor 0 10k 1x is pointing at the required range Press enter to select the 0 100k Ix range Turning a built in sensor ON or OFF the display Light With the cursor pointing at Turn Off or On press enter gt set range gt Turn Off A e Press the stop button Mf to return to the Meters window Note If you change a sensor s range or turn it on off via the logger while connected to a computer it maybe necessary to select New in the software for these changes to be detected Data Harvest Group Ltd 6 EASYSENSE Vu Reference Manual DO241 1 Ways to capture data with Vu There are different ways that Vu can be used to collect data 1 As a stand alone instrument Vu is used to display collect and store data while disconnected from the computer l e a Display readings on its LCD screen but not stored using Meter mode b Displayed collected and stored using Vu s logging menu options e g Pictogram EasyLog Snapshot Timing and Counting c Setup via Setup Remote in the EASYSENSE software to log data for a set time period See page 22 The data collected is stored in Vu s memory to either be reviewed on Vu s screen or retrieved to the EASYSENSE software on a computer Up to 6 sets of data can be stored in Vu s memory Once six sets have been stored Vu will overwrite the earliest data set with the newest 2 Asa logger connected to a PC com
5. altered e In Vu Meters see page 6 e In Vu System see page 17 e Using Sensor Config in the EasySense software Settings menu e Using New in the EasySense software EasyLog Graph Pictogram Snapshot Counting mode Powering Vu EASYSENSE Vu can be powered by 1 By the USB port whilst connected to the computer Data Harvest Group Ltd 23 EASYSENSE Vu Reference Manual DO241 1 2 By its internal batteries when charged Connect Vu directly to a USB port on your computer or a powered USB hub using the USB cable supplied with it A full charge can take up to 8 hours A battery charging symbol will be displayed on Vu s screen while the logger is charging Your computer must be turned on and not in sleep or standby mode otherwise the battery may drain instead of charge Notes e Vu can also charge from a USB mains charger that outputs 5 V at 500 mA or more e EASYSENSE Vu can only be connected directly to a computers USB port or by using a powered USB hub It will not work with an unpowered hub EASYSENSE Vu requires an output current of 500 mA e Anextension cable must be of a single direct port extension type While Vu is accepting power from the USB port it will not operate auto switch off Batteries Vu is fitted with a rechargeable lithium ion battery pack Whenever Vu is connected to the USB port on the computer it will automatically re charge the battery Lithium ion batteries are memory
6. sunlight for extended periods of time Do not expose to temperatures greater than 60 C e g near a heater or inside a car in hot weather Do not store Vu with its battery fully discharged Ideally Vu should be stored at least 40 or more state of charge See page 24 Updating EASYSENSE Vu s Firmware Occasionally Data Harvest may release updated firmware which will contain improvements or new features Updates will be made available from the Data Harvest website To update the firmware of your EASYSENSE Vu logger Step 1 Copy the English Firmware Update for Vu onto the hard disc of your computer and run the exe FirmwareUpdate_2300_English_ 1 0 Step 2 Connect Vu to the computer using the USB cable Step 3 Wait for a few seconds A progress bar will indicate Vu is being programmed A tick will indicate if the process was successful Disconnect Vu If you wish to repeat this process connect another Vu and click on the update window Data Harvest Group Ltd 27 EASYSENSE Vu Reference Manual DO241 1 FirmwareUpdate_2300_English_ 1 0 A cross will indicate that an error occurred Click on the update window to go back to the start screen and re program Step 4 Exit the program Practical information for Vu s plug in Temperature sensor e The sensor has a particularly low thermal inertia The thermistor is housed at the end of the stainless steel tube so it is the tip of th
7. two minutes have passed since any measurements have been taken or a button was pressed e If Vu is accepting power from the USB port or similar it will not operate auto switch off e Vu will wake up when any button is pressed e While remote recording on battery power in EasyLog mode or after using Setup Remote Vu will stay awake until the interval between readings reaches 5 seconds or greater at this point it will begin to use sleep mode between samples waking up just in front of the sample time to allow the sensors to stabilise Data Harvest Group Ltd 24 EASYSENSE Vu Reference Manual DO241 1 e While in Timing or Counting mode Vu does not operate auto switch off and will stay awake ready to take a measurement Internal Clock and Calender Vu s internal clock will be updated automatically by the computers clock date and time each time it is connected to the computer and the EasySense software is run Note If the date or time on a data set is not correct check the date time settings on your computer Vu s memory Vu s memory space is divided into 6 data slots and so can store six investigations that have been collected in standalone mode when not connected to the computer Each slot is filled in turn Once the 6 slot is used Vu will begin to overwrite existing data starting at memory slot 1 the earliest data set Note A System Full Reset will erase all data sets and return the logger back to its facto
8. up and down buttons A to scroll through the data sets press enter gt when you locate the correct data set The most recently stored data is shown first 3 Use the up and down buttons A F to scroll through stored data points If more than 3 sensors were logged use the enter button to toggle to the second screen 4 Press the stop W button to return to the list of data sets then Ml again to return to the main menu Data Harvest Group Ltd 16 EASYSENSE Vu Reference Manual DO241 1 System v OUNT gt Switch off Rev1ew Sensor oe hail Full Reset Language Date Style Decimals A Use the scroll buttons to go Vv up or down the list of options gt Use enter to select an option 1 While in the main menu use the up or down buttons A F to scroll until the cursor is pointing at System Press the enter button to select 2 Use the up and down buttons A F to scroll the menu until the cursor is pointing to the appropriate system menu option Press the enter button to select Switch Off Used to send Vu directly into low power sleep mode even when it s connected to a USB port With the cursor pointing at Switch Off press the enter gt button to select Press any button to wake up the logger Note While operating on battery power Vu automatically goes to low power sleep after a period of inactivity Sensor changing range or turning on or off Note These options are also availabl
9. using the range selected The built in sensors can be hidden from the display see page 6 Sound sensor This sensor has one range 40 to 110 dBA decibels which is used to measure sound pressure level loudness It is responsive to both single sounds such as a whistle or handclap and continuous background noise such as passing traffic classroom noise Light level sensor This sensor has 3 ranges to choose from e Indoor 1 k Ix This lower range is suitable for recording at indoor light levels and so is normally selected for use in the classroom e In Out 10 k Ix This medium range is suitable for recording bright light levels indoors or low light levels outdoors e Outdoor 100 k Ix This larger range is suitable for recording light level outdoors in sunlight which makes it ideal for environmental monitoring Temperature sensor This sensor has six ranges to choose from three Celsius and three Fahrenheit The range selected will also be applied to plug in temperature sensors Notes e For convenience the built in temperature sensor is displayed on the same scale as the plug in temperature sensors however Vu can only be used in an environment of 0 to 40 C 0 to 95 RH non condensing e The speed of reaction of the built in temperature sensor to any change in external temperature will be delayed by Vu s plastic case e Ifa FULL RESET System is performed on Vu it will return its sensors to their default settings this senso
10. 6 Downloaded to a computer by selecting Retrieve Remote from the Home screen in the EasySense software see page 23 Data Harvest Group Ltd 10 EASYSENSE Vu Reference Manual DO241 1 Vu records data at a rate of 40 samples per second until it has captured 1 000 samples At this point the sample rate halves i e 20 samples per second and alternate samples are discarded leaving 500 samples It will continue at this speed until it has captured another 500 samples 1 000 in total then the sample rate halves i e 10 samples per second and discards half the stored data and so on a 0 025 esm 0 1000 28 Tapers 008 wom Bese Pp oo 10persec 0 1 aom MSc 1 40 05 oom Ooo 8 20 tpersec 1 ooo ea Compress to a fifth Evey5ses 5 ooo 1 23 20 Every 15 sec ee ed E e go TT to a half Every 30 sec 500 1000 eey o fee fe wo fo even sian aon oee o ao o een tiie 0 e o vw 0 Peer anrinane o eee ao a o meyin sew asa a ve o While battery powered Vu will stay awake until the interval between readings reaches 5 seconds or greater at this point it will begin to sleep auto switch off between samples to conserve battery power When Vu is asleep sensor readings can be viewed by pressing any button to wake it up Note Vu does not auto switch off when accepting power from the USB port When the sample interval is greater than or
11. and is pleased to provide a disposal service for any of our products when their life expires Simply return them to us clearly identified as life expired and we will dispose of them for you This device complies with Part 15 Radio Frequency Devices of the Federal Communications Commission FCC rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Data Harvest Group Ltd 1 Eden Court Leighton Buzzard Bedfordshire LU7 4FY Tel 44 0 1525 373666 Fax 44 0 1525 851638 e mail sales data harvest co uk support data harvest co uk Website www data harvest co uk Data Harvest Group Ltd 29
12. ck on Finish Click on the Start Stop icon to begin recording Logging will start with a time span of 30 seconds and when this has elapsed the time will double automatically This will continue until the recording is stopped by clicking on the Start Stop icon Data Harvest Group Ltd 20 EASYSENSE Vu Reference Manual DO241 1 Meters E TF The Meters window gives an introduction to sensors and how they respond to change Up to four section displays can be open at any one time and they can be any combination of sensors and displays The program will open with live data from one sensor in a Numeric window Click on the appropriate picture icon on the tool bar to open other section displays i e Numeric Gauge Colour Change or Bar To alter the sensor displayed in a section right click in the individual section window and select the sensor from the list Click on the Start Stop icon to stop recording Pictogram Level 1 only The value from the sensors can be displayed as pictures or an abstract colour Me block or bar chart Each picture represents a 10 of the range or span of the sensor and is also displayed as a number from zero to ten The program will open with live data from the sensors displayed as pictures on a horizontal chart The graph type can be changed to an abstract colour blocks a bar chart or oriented vertically The sensor readings are captured every time the Store icon is selected Click on the Star
13. de NaOH for up to 48 hours with only minor discoloration We do not recommend use in a solution whose concentration is greater than 3 mol dm e The maximum length of time recommended for exposure to an acid is dependent on the acid s concentration In general we do not recommend that temperature Data Harvest Group Ltd 28 EASYSENSE Vu Reference Manual DO241 1 sensors be left to soak in acids of between 1 3 mol dm concentrations for longer than 48 hours The exceptions to this rule are Hydrochloric acid HCI and Sulphuric Acid H2SQz The maximum recommended times for exposure are hydrochloric acid exposure sulphuric acid exposure 1 mol dr 20 minutes Warranty EASYSENSE Vu is warranted to be free from defects in materials and workmanship for a period of 12 months from the date of purchase provided it has been used in accordance with any instructions under normal laboratory conditions This warranty does not apply if Vu has been damaged by accident or misuse In the event of a fault developing within the 12 month period EASYSENSE Vu must be returned to Data Harvest for repair or replacement at no expense to the user other than postal charges Note Data Harvest products are designed for educational use and are not intended for use in industrial medical or commercial applications WEEE Waste Electrical and Electronic Equipment Legislation Data Harvest Group Ltd is fully compliant with WEEE legislation
14. e by pressing enter gt whilst in Meter mode Some built in and plug in sensors have multiple ranges and the built in sensors can be switched On or Off the display e g Sound and Temperature switched off so only Light measurements are displayed sound e Use the up or down buttons A Y to move the cursor until it is gt Light pointing at the appropriate sensor and press enter P Temperature e Use the A V buttons to move the cursor until it points at the gt appropriate option and press enter gt Set range Turn Off Note If a sensor only has one range then only Turn Off will be available Set range The cursor will indicate the current range selected Use the up or down buttons A YF to scroll the list until the cursor is pointing at the required range Press enter to select 0 100k 1x Note A plug in Temperature sensor will use the same range as selected for the built in Temperature sensor Data Harvest Group Ltd 17 EASYSENSE Vu Reference Manual DO241 1 Turning a built in sensor ON or OFF the display With the cursor pointing at Turn Off or On press enter P gt Turn off Set range e Press stop M to return to the System menu Notes e If you change a sensor s range or turn it on off via the logger while connected to a computer it maybe necessary to select New in the software for these changes to be detected e fa Full Reset is performed it will automatically return all sensors to their de
15. e page 23 Remote Other calculations can be performed on the timing data by downloading to the EasySense software then using the Show Data as function from the Settings menu in Timing It will be necessary to enter the parameter used in the investigation e g the length of a segment of a double interrupt card to calculate acceleration from a single Light gate at A Timing options G Time or Speed at A Timing starts when the signal at input A changes and stops when the signal reverts back With Light gates it will be the time it takes for an object to pass through the light beam For a Push Switch it will be the length of time that the switch is kept depressed For Timing mats it will be the length of time someone stands on the mat Stop A Off Start A On Data Harvest Group Ltd 14 EASYSENSE Vu Reference Manual DO241 1 Time or Speed from A to B Start A On Timing will start when a signal change is detected at sensor A and stops when the signal at B changes so it measures the time taken by an object to travel from sensor A to sensor B Time A to A stopwatch Rm The time will start to be measured when the signal at input A changes ON and will continue until the signal at A changes again ON i e like a stopwatch Counting Counting is used to count events by using e One digital switch type sensor connected to either input A or input B e Two digital switch type sensor
16. e sensor that is most sensitive to temperature e Lay the sensor on its side not its end when measuring a surface temperature e Do NOT put any part of the sensor in a direct flame or on a hot plate e Temperatures higher than 150 C will damage the sensor e The PVC insulation on the connecting cable has a working range of 10 to 85 C so keep this cable away from the source of heat e Avoid submerging the sensor beyond the stainless steel portion e Wash the sensor thoroughly after use e The boiling point of water will vary with changes in air pressure At one atmosphere of pressure 101 3 kPa 1013 mBar pure water boils at 100 C Water boils when the vapour pressure of water equals the pressure of the gases above water so if the pressure changes then the temperature that the water boils at will also change Boiling Point of Water vs Pressure Pressure in kPA Temperature in C 101 3 1013 100 0 995 HG N8 T 990 96 0 0 985 _ For Advanced Users Resolution 0 1 C 0 1 F Accuracy 0 5 C at 0 70C rising to 1 C at extremes of range e The 3mm by 200 mm AISI 316 stainless steel tube has a high resistance to corrosion from a wide variety of weak acids and alkalis Some environments e g saltwater may cause some discolouration to the stainless steel tube but this will have no effect on the sensor s performance e The sensor can be left in an alkaline solution such as Sodium Hydroxi
17. equal to one second after logging for 8 minutes and 20 seconds it is possible to download data from Vu to a computer to check its validity without interrupting the recording using Remote gt Retrieve Remote from Home screen in the EasySense software Note If you would prefer to record remotely for a specified time span use Remote Setup Remote from Home screen in the EasySense software Snapshot Snapshot mode enables you to capture sensor readings every time the enter button gt is pressed rather than at regular time intervals At least 650 readings can be stored as a data set in Vu s memory Press enter to confirm your choice or stop to continue logging T EasyLog g 48 8 dBA Stop Recording gt Snapshot gt xe 356 1x gt for yes Timi 24 0 c E for no i Ba Samples taken 8 Samples taken 2 Press the enter button Press stop when you ve to take a sample taken enough samples Data Harvest Group Ltd 11 EASYSENSE Vu Reference Manual DO241 1 1 Connect any plug in sensors if required If the display is turned off press any button to wake up Vu 2 While in the main menu use the up or down buttons A F to scroll until the cursor is pointing at Snapshot Press the enter button to select 3 Each time you press the enter button a reading will be taken from the sensors The bottom line of the LCD will display the number of samples taken so far If using more than 3 sensors use the A V buttons to view the c
18. erence Manual DO241 1 The EASYSENSE Vu data logger Inputs A and B for plug in sensors Temperature Sound sensor sensor Light sensor grid visible aes Built in rechargeable battery Battery power level indicator LCD display USB input SCROLL up button STOP or BACK ENTER or SELECT button button SCROLL down button Lanyard slot Vu buttons The ENTER button is used to start data collection progress to the next screen confirm a choice or take a sample The square STOP button is used to stop data being recorded or return to the previous screen The SCROLL buttons are used to scroll through menus on the LCD screen or to browse measurements during data logging Si EA To operate EASYSENSE Vu press any of these buttons Data Harvest Group Ltd EASYSENSE Vu Reference Manual DO241 1 Sensors The built in sensors Vu is a fully self contained portable data logger with 3 built in sensors Sound Light and Temperature It is supplied with the default range for its sensors selected and the built in Temperature sensor switched off Built in Sensors Ranges default range Sound 40 to 110 dBA Indoor 1 k Ix 0 to 1 000 Ix Light level In Out 10 k Ix O to 10 000 Ix Outdoor 100 k Ix 0 to 100 000 Ix Celsius 0 to 50 C Celsius 0 to 110 C Temperature Celsius 30 to 110 C Fahrenheit 0 to 120 F Fahrenheit 0 to 232 F Fahrenheit 22 to 230 F Vu will automatically display values
19. erm click on the Start Stop icon D Data Harvest Group Ltd 21 EASYSENSE Vu Reference Manual DO241 1 Scope Level 3 only VJ Scope has a simple oscilloscope type display 1 A logging wizard will open deselect the tick next to any sensors from which readings are not required and click on Finish 2 Select the Timebase from panel on the right The fastest interval between readings for View is 20 ms roll mode 3 Click on the Start Stop con kel to begin recording The graph trace will be redrawn continuously on the screen until you click on the Start Stop icon a when the trace will freeze Timing Timing is used to allow students to study Time Velocity Acceleration Momentum and Kinetic Energy relationships using switch type digital sensors such as Light gates connected to input A or A and B A wizard will open with the recording options available these will depend on the user level selected When the selection has been made click on Finish Click on the Start Stop icon and a reading will be displayed when a change is detected in signal from the digital sensors Click on the Start Stop icon D to stop data being recorded Counting Level 1 and 2 only Use to count events by using switch type digital sensors The program will open pre set to display a count as a number and horizontal bar graph Click on the Start Stop icon gt each time the state of a sensor is changed to On e g by pressing a pu
20. fault position internal Temperature Off Sound and Light On Full Reset A full reset erases all data sets and returns the logger back to the factory default settings Note A hard reset See page 25 can be tried first if Vu simply stops responding a hard reset won t alter settings or erase data A full reset will o Erase all stored data sets Automatically return all sensors to their default position internal Temperature Off Sound and Light On o Return the built in sensors to their default range Light Indoor 1 k Lux Temperature Celsius 0 to 50 C o Return the date format to DD MM YY o Return decimals to On with a full stop format o Return language to its default e With the cursor pointing at Full Reset press the enter gt button to select e Select the enter button to confirm the reset or stop If to cancel and exit e Once done press enter to return to the System menu Language Use to alter the selected language e With the cursor pointing at Language press the enter gt button to select The screen will show the language options if any The cursor will indicate the current language selected e If you wish to alter the choice use the scroll A Y buttons to scroll the cursor until it is pointing at the preferred language and press the enter gt button to select Note If a System Full Reset is performed language will automatically return to its default Date Style Use this option to al
21. free and prefer a partial rather than a full discharge Constant partial discharges with frequent recharges will not cause any harm Frequent full discharges should be avoided whenever possible Ideally Vu should be stored at about 40 or more charge Do not store Vu with its battery fully discharged or with sensors connected Even when turned off asleep Vu will use a Small amount of current and the battery will slowly discharge Some reserve charge is required to retain data and settings in memory If Vu is to be stored for lengthy periods without use then it s a good idea to recharge the battery every 6 8 weeks When its battery is in good condition and fully charged it will power Vu in EasyLog or remote mode for a minimum of 41 days The speed at which a lithium ion battery will age is governed by both its storage temperature preferably less than 40 C and state of charge Ideally batteries should be replaced every 4 years Eventually the battery pack will no longer deliver the stored energy and will need to be replaced A fully charged battery that looses its charge quickly or a battery with symptoms of swelling or physical damage will demonstrate the need for replacement When this happens contact Data Harvest and request a battery replacement pack for EASYSENSE Vu Product No 5007 Auto switch off While battery powered Vu will normally auto switch off go into low power sleep mode to reduce power consumption if more than
22. lect e Press the stop button Mf to return to System menu Note If a System Full Reset is performed decimals will automatically return to its default decimals On displayed and the format as a full stop Using Vu connected to a computer for the first time Step 1 Install the EasySense software if it is not already on your computer For details of how to install and operate this program please refer to the instructions provided with the EasySense software EASYSENSE Vu requires version 3 1 or above of the EasySense software The version number can be verified in About from the Help menu Step 2 Connect Vu to the computer s USB port using the USB cable supplied Windows will automatically detect a new device and install the drivers Step 3 e Check that the LCD display on Vu is displaying the main menu EasyLog Snapshot Timing Counting Review System Note In most circumstances Vu will not communicate with the PC if it is taking samples If the LCD screen shows samples being taken press the stop ll button to finish recording AA Ay e Open the EasySense software program Ma Data Harvest Group Ltd 19 EASYSENSE Vu Reference Manual DO241 1 Step 4 The first time the EasySense program is opened a Select Program Level window will automatically open Select a suitable user s level e Level 1 is aimed at start level e g up to 9 years old e Level 2 is aimed at mid level e g 9 15
23. mary press enter again to return to the EasyLog screen Interval 500 ms 00 00 03 24 1 Connect any plug in sensors if required If the display is turned off press any button to wake up Vu 2 While in the main menu use the up or down buttons A F to scroll until the cursor is pointing at EasyLog Press the enter button to automatically begin logging If using more than 3 sensors use the A Y buttons to view the current value while still logging The bottom line of the LCD display is a visual indicator of logging as it takes place each time the line completes logged samples are compressed and the sample rate alters Press the enter button to see a logging summary i e samples taken current logging interval and the elapsed time days hours minutes seconds Press enter gt again to return to the normal screen Note If Vu goes into sleep mode during logging any button press will wake up the logger 3 When the investigation is complete press the stop button W Vu will continue to log data until you press the enter button to confirm your choice The data will be stored as a data set identifiable by the method and time and date the recording was started i e EasyLog 09 05 12 16 12 43 The contents of the data set can be Reviewed on Vu select Review from the main menu use the A V buttons to locate the data set press enter to select Use the A V buttons to scroll through individual readings see page 1
24. n proportional to the reading Sensor readings are captured every time the enter button is pressed rather than at regular time intervals The samples are stored to Vu s memory a maximum of ten samples per data set Press either enter to confirm your choice or stop to continue logging y CEB 8 Meter A l gt Pictogram h i CAD il Stop Recording Hil gt for yes il E for no EasyLog A Samples taken 2 ji Samples taken 2 Press stop when you ve Select whether data should be Press the enter button taken enough samples represented by an icon picture to collect a sample a block symbol or a bar maximum of 10 Data Harvest Group Ltd 8 EASYSENSE Vu Reference Manual DO241 1 1 Connect any plug in sensors if required If the display is turned off press any button to wake up Vu 2 While in the main menu use the up or down buttons A to scroll until the cursor is pointing at Pictogram Press the enter button to select 3 Usethe A V buttons to move the cursor until it points at how you want the data to be represented Press enter gt to select 4 Each time you press the enter button gt Vu will take a reading from the sensors built in and any plug in and will show the number of samples taken so far Use the up or down buttons A F to scroll and view data Samples taken 2 from the sensors Note If Vu goes into sleep mode during logging press any button to wake up the logger and then pre
25. nected to input A and the sensor connected to input B Speed from A to B Distance from A to B Time e For Speed at A select the width of the single interrupt card that will pass through the Light gate connected to input A Speed at A Length of single interrupt card Time Data Harvest Group Ltd 12 EASYSENSE Vu Reference Manual DO241 1 Time example Speed example y y Snapshot Snapshot gt Timing gt Timing Counting Counting y gt Speed A Speed A to B v gt Press enter Card W1 dth to alter 40 0 mm display to seconds A Scroll to find the correct V card width 235 ms No samples 3 A z Speed at a Z Stop Recording gt for yes E for no 0 28 m s No samples 5 Press stop to exit then either enter to confirm your choice or stop to continue logging 1 If recording Time or Speed at A or A to A connect a digital sensor to input A For Time or Speed from A to B connect digital sensors to both Input A and B 2 If the display is turned off press any button to wake up Vu While in the main menu use the up or down buttons A F to scroll until the cursor is pointing at Timing Press the enter button to select 3 Use the A Y buttons to scroll until the cursor is pointing at either Time or Speed Press the enter button to select Data Harvest Group Ltd 13 EASYSENSE Vu Reference Manual DO241 1 4 6 Use the A Y buttons to scroll until the curso
26. nto sleep mode during logging press any button to wake it up If counts are from both A and B pressing the enter button will cycle through simple calculations based on the counting data e g A B 13 A B 3 B A 3 Difference 3 4 Press the stop lf button to finish and then enter gt to confirm your choice The count will be stored as a data set identifiable by the method and time and date the recording was started e g Counting 09 05 12 16 12 43 Up to 999 samples can be stored in one data set The contents of the data set can be Reviewed on Vu select Review from the main menu use the A V buttons to locate the data set press enter to select Downloaded to a computer by selecting Retrieve Remote from the Home screen in the EasySense software see page 23 Remote Review You can use Retrieve to view the readings previously stored in a data set on Vu s screen The most recently stored data is shown first Counting Snapshot A 4 1 gt Review gt 08 04 12 40 0 dBA 14 44 09 xe 251 x System A A Data set 1 of 5 A Sample 4 of 10 Scroll up or down the list of dd l data sets until you find the Scroll to view the data right one v Use the enter button to toggle to the next screen if more than 3 sensors were logged 1 While in the main menu use the up or down buttons A F to scroll until the cursor is pointing at Review Press the enter button to select 2 Use the
27. of the Licensee on condition that it is not loaned sold or used outside the Licensee s premises Data Harvest s policy is to continually improve products and services so we reserve the right to make changes without notice It is acknowledged that there may be errors or omissions in this publication for which responsibility cannot be assumed No liability will be accepted for loss or damage resulting from use of information contained in this manual or from uses as described Document No DO241 1 Data Harvest Group Ltd 2 EASYSENSE Vu Reference Manual DO241 1 What s supplied A mini USB connection cable Plastic storage box The EASYSENSE Vu data logger and lanyard CD ROM that contains the EASYSENSE software V3 1 or above plus documents including the Vu eBook with over 40 activities Plug in Vu Temperature sensor Getting to know your Vu data logger Charging Charge EASYSENSE Vu fully before first use Connect Vu directly to a USB port on your computer or a powered USB hub using the USB cable supplied with it A full charge can take up to 8 hours A battery charging symbol will be displayed on Vu s screen while the logger is charging Your computer must be turned on and not in sleep or standby mode otherwise the battery may drain instead of charge Note Vu can also charge from a USB mains charger that outputs 5 V at 500 mA or more Data Harvest Group Ltd 3 EASYSENSE Vu Ref
28. or plugged into Input A or B so A and B are omitted from the list Data Harvest Group Ltd 7 EASYSENSE Vu Reference Manual DO241 1 Meter In Meter mode Vu will display measurements from the sensors built in and any plug in sensors on the LCD screen but will not store any data Press stop to pause the display Jf then either stop again to exit Meter or enter to return to the meter screen o sam Press the enter button to switch A 2 8 5 C a sensor off or change its range MECE gt 50 9 dBA A Use the up or down buttons to 3 1 5 0 X W view data from the sensors 1 Connect any plug in sensors if required If the display is turned off press any button to wake up Vu 2 While in the main menu use the up or down buttons A WV to scroll until the cursor is pointing at Meter Press the enter button to select e Use the up and down buttons A V to view data from the sensors e Use the enter button to check or change the sensors range or to switch a sensor off See page 6 e The stop button W will temporarily halt the updates to the sensors readings Two lines Jf top left indicate that the display is paused o Press enter to cancel pause and continue in Meters o Press stop W again to exit Meters and return to the main menu Pictogram Pictogram uses an image block or bar to represent the data Each represents a 10 of a total range or span of the sensor and displays a number from zero to te
29. puter Vu is entirely driven by the software on the host computer The data from the sensors is transmitted immediately to the computer and displayed on the computers screen using the options in the EASYSENSE software This method of collection is useful for many classroom based experiments See page 19 Using Vu standalone without a computer EASYSENSE Vu has no ON switch To switch on press any button on the panel Notes e If Vu is operating on battery power and is idle it will automatically switch itself off after 2 minutes Press any button to resume operation e Vu does not auto switch off while powered from a USB port Vu has a menu of different options available which are displayed on the built in LCD screen Meter Pictogram There are six working modes which can be used to collect data without being connected to the computer These are Meter Pictogram Easy Log Snapshot Timing and Snapshot 1 Counting modes timing l Counting A menu option is selected by using the scroll buttons to Review move the cursor up A or down Y until it is pointing at the 1 System l l required option then press the enter button to select If using plug in sensors they should be connected before entering a logging mode except for Meters when they will automatically ID and then display readings Note Some of the following examples show the effect seen on the LCD display when there is no sens
30. r is pointing at either Time or Speed at A or Time or Speed from A to B or Time A to A stopwatch Press the enter button to select If Speed is selected A VW scroll to choose the parameter that matches your setup e For Speed at A select the width of the single interrupt card from 10 to 1 000 mm e For Speed from A to B select the distance from the sensor connected to A to the sensor connected at B from 0 10 to 6 0 metres Press the enter button to select When a signal change from the digital sensor sensors is received the timing measurement will be displayed on the LCD screen Time data will be measured in milliseconds press enter to alter the display to show seconds Speed data is in metres per second m s The bottom line of the LCD will display the number of samples taken so far Press the stop lf button to finish or cancel any pending timing event and then enter gt to confirm your choice The readings will be stored as a data set identifiable by the method and time and date the recording was started i e Timing 09 05 12 16 12 43 Up to 850 samples can be stored in one data set The contents of the data set can be Reviewed on Vu select Review from the main menu use the A V buttons to locate the data set press enter to select Use the A V buttons to scroll through individual readings see page 16 Downloaded to a computer by selecting Retrieve Remote from the Home screen in the EasySense software se
31. r switched off Data Harvest Group Ltd 5 EASYSENSE Vu Reference Manual DO241 1 The plug in sensors Plug the sensors into the sockets labelled A and B on the back of the Vu logger Sensor sockets When a sensor is connected it will automatically be detected and displayed on the LCD display as A and or B depending on which input the sensor is connected to Note All Temperature sensors will use the same range as selected for the built in sensor Sensors can be divided into two main types 1 Analogue used to measure physical quantities such as temperature sound light pH etc 2 Digital switch type sensors e g Light gates and Timing mats that are either ON or OFF and are used to calculate time speed and acceleration Please contact your supplier for an up to date list of Vu sensors Changing a sensor s range or turning a sensor on or off e Use the up or down buttons A W to scroll the list until the cursor is pointing at Meter and press the enter button gt e Press the enter button gt again e Use the up or down buttons A VW to move the cursor until it is pointing at the appropriate sensor and press enter P e Use the A V buttons to move the cursor until it points at the appropriate option and press enter P pprop p p Turn Off Note If a sensor only has one range then only Turn Off will be available Set range The cursor will indicate the current range selected y l l gt
32. ry default settings See page 18 Fitting the lanyard tveg Thread the thin cord loop through Thread the ribbon strap completely both slot holes in the base of the through the open loop of the thin logger cord Pull the thin cord end tight to achieve a secure fitting Hard Reset If Vu fails to respond to the computer or a button press carry out a Hard Reset 1 If necessary attach Vu to USB power 2 Press J Yv A at the same time If the hard reset has been done correctly the LCD will display EASYSENSE Vu and the version number of its operating system before returning to the main menu Note A Hard Reset does not erase any stored data sets but if a recording is interrupted by a reset then the data being captured will not be stored Data Harvest Group Ltd 25 EASYSENSE Vu Reference Manual DO241 1 If Vu still fails to respond apply a Full Reset see below or contact Technical Support at Data Harvest Please provide details of e The computer platform it is being used with e The software version number e Adescription of the problem being encountered If possible telephone from a location where you can operate Vu with the computer Full Reset A Full Reset will return Vu back to the factory default It will Erase all stored data sets o Automatically return all sensors to their default position internal Temperature Off Sound and Light On and return the built in sensors to their defaul
33. s connected to both input A and input B e Theup A A or down B buttons on Vu If plug in Sensors are connected Vu will automatically count using input from those Sensors Press either enter to confirm your choice or stop to continue logging Vv ca Timing gt Counting Review A Select enter to perform simple mathematical functions on the A B data Scroll icons indicate the up and down buttons are being used instead of a plug in sensor to count 1 If you are using plug in digital sensors connect them to input A and or B If the display is turned off press any button to wake up Vu 2 While in the main menu use the up or down buttons A WV to scroll until the cursor is pointing at Counting Press the enter button to select 3 If you are using plug in digital sensors each time the state of the sensor is changed to On e g by pressing a push switch the number of counts will advanced by one If the scroll buttons on Vu A Ware used then the count will increase by one each time you press a button You can use either one or both buttons e g use the A button to count people entering a room and VY to count those leaving Data Harvest Group Ltd 15 EASYSENSE Vu Reference Manual DO241 1 Vu will display both the numeric value and show it as a bar graph The bar maximum starts as 10 if the count goes above 10 it will increase to 20 then 50 100 250 500 up to a maximum of 1 000 Note If Vu goes i
34. sh switch the number of counts will advanced by one Click on the Start Stop icon D to stop data being recorded Remote B gt Setup Remote Use to program Vu to capture data for a set time span while disconnected from the computer remote The collect data is stored in Vu s memory to be retrieved by the computer at a later stage The window will open with a logging wizard 1 Deselect the tick next to any sensors from which readings are not required Next 2 Select the total recording time and the interval between the samples being taken Next 3 Select the condition required for the recording to start i e When Enter pressed the recording will start as soon as you press the gt button on Vu Trigger on Level the recording will start when the sensor selected is above below rises above or falls below a set level e g when the value from a Temperature sensor rises above 15 C Trigger on Digital Condition the recording will start when a digital sensor connected to A or B is On Off rising to On or falling to Off Trigger on Time the recording will start at the time and date specified This trigger is useful for recording at a time when a logger is unattended or to start multiple loggers at the same time 4 When the selection has been made click on Finish The settings will be Data Harvest Group Ltd 22 EASYSENSE Vu Reference Manual DO241 1 downloaded to Vu and a message on the computer will inform
35. ss gt to take a reading 5 When you have finished sampling press the stop button ll to close the data set then gt to confirm your choice The readings will be stored as a data set with a maximum of ten samples per set A data set is identifiable by the method and time and date the recording was started i e Pictogram 09 05 12 16 12 43 The contents of the data set can be Reviewed on Vu select Review from the main menu use the A V buttons to locate the data set and press enter to select Use the A V buttons to scroll through individual readings see page 16 Downloaded to a computer by selecting Retrieve Remote from the Home screen in the EasySense software see page 23 Key for built in sensors SEL ene Sound 40 to 110 dBA range ey Scale 10 of range Sensor and 7dBA Light 0 to 1 k Ix Light 0 to 10 k Ix Light 0 to 100 k Ix 100 Ix 1 000 Ix 10 000 Ix Temperature 0 to 50 C Temperature 0 to 110 C Temperature 30 to 110 C Temperature 0 to 120 F Temperature 0 to 232 F Temperature 22 to 230 F 10 of range Data Harvest Group Ltd 9 EASYSENSE Vu Reference Manual DO241 1 EasyLog With EasyLog it is not necessary to set the duration of the recording Vu will capture data until stopped Press stop to finish logging then either enter to confirm your choice or stop to continue logging y Pictogram gt EasyLog Snapshot A Press the enter button to view a logging sum
36. t Stop icon to stop recording Snapshot Snapshot will open pre set to record sensor values on demand manual sampling with a bar graph display A logging wizard will open deselect the tick next to any sensors from which readings are not required and click on Finish Click on the Start Stop icon to begin recording Click in the graph area to collect a sample for each active sensor Click on the Start Stop icon to stop data being recorded Graph Level 2 and 3 only VAVA Graph is pre set to record sensor values against a chosen time span as a line graph display The window will open with the Real time logging wizard 1 Deselect the tick next to any sensors from which readings are not required Next 2 Select the total recording time and the interval between the samples being taken the shortest interval for Vu logger is 20 ms Next 3 Select the condition required for the recording to start i e e None the recording will start as soon as you click on the Start Stop icon e Trigger on Level the recording will start when the sensor selected is above below rises above or falls below a set level e g when the value from a Temperature sensor rises above 15 C 4 When the selection has been made click on Finish The recording will start when the start condition you have selected is met The recording will stop when the selected time span has passed Note If you want to stop a recording before it has run the full t
37. t range Light Indoor 1 k Lux Temperature 0 to 50 C o Return the date format to DD MM YY o Return decimals to On with a full stop format o Return the language to its default e Scroll A Vthe menu to System press enter gt to select Scroll down Y to Full Reset Press the enter gt button to select e Select enter to confirm this selection e Select enter to return to the System menu Specifications 128 x 64 graphic display Firmware upgradeable USB compatible communication V1 1 amp V2 0 compatible Operating range 0 40 C and 0 to 95 RH non condensing Memory capacity 6 data sets 10 bit sampling resolution Graph and Scope maximum logging speed 20 millisecond ms interval between samples Digital timing Resolution 5 3 microseconds Power specifications 5 V at 500 mA or more aa 7 TUA Weight of Vu approx 167 g pom y 130 mm 36 mm mi Dimensions H 36 mm max W 90 mm D 130 mm Data Harvest Group Ltd 26 EASYSENSE Vu Reference Manual DO241 1 Care amp Maintenance e Clean with a damp cloth do not immerse in water or detergent Vu is not waterproof e Vu is suitable for use in an operating range of 0 40 C and 0 to 95 RH non condensing Do not subject to extreme heat or cold or leave in a location where it will get wet If Vu has been left in the cold let it warm to near room temperature before waking it from sleep Do not expose to direct
38. ter the format of the date display how you would like the date displayed i e from a European to USA date format DD MM YY to MM DD YY The actual time and date is set automatically by the computers clock see notes e With the cursor pointing at Date Style press the enter gt button to select Data Harvest Group Ltd 18 EASYSENSE Vu Reference Manual DO241 1 e The cursor will indicate the current selection If you wish to alter the choice use the A Y buttons to scroll the cursor until it is pointing at the preferred style and press the enter gt button to select Notes e Vu s internal clock is set automatically by the computers clock date and time each time it is connected to the computer and the EasySense software is run If the date or time on a data set is not correct check the date time settings on your computer e fa System Full Reset is performed the date format will automatically return to its default DD MM YY Decimals Use to switch decimals off and on or to change the decimal format from a full stop to a comma e With the cursor pointing at Decimals press the enter gt button to select Turn On or Off With the cursor pointing at Turn Off On press enter gt to alter the selection from Off to On or visa versa Format To change the format of the decimal separator from a full stop to a comma scroll to Format and press enter gt Scroll to the number displayed with a comma press enter gt to se
39. urrent value from the sensors while still logging Note If Vu goes into sleep mode during logging press any button to wake up the logger then press gt to take a reading 4 When you have finished sampling press the stop button W to close the data set then enter to confirm your choice The readings will be stored as a data set identifiable by the method and time and date the recording was started i e Snapshot 09 05 12 16 12 43 At least 650 samples can be stored in one data set the limit is dependant on the number of sensors The contents of the data set can be Reviewed on Vu select Review from the main menu use the A V buttons to locate the data set press enter to select Use the A V buttons to scroll through individual readings see page 16 Downloaded to a computer by selecting Retrieve Remote from the Home screen in the EasySense software see page 23 Timing Timing is used to set up and store simple time and speed measurements Connect the digital switch type sensors before selecting Timing The options available will depend on whether one sensor is connected to Input A or two are connected to Input A and Input B The possibilities are Time at A Time from A to B and Time A to A stopwatch Speed at A and Speed from A to B For Vu to perform direct calculations of speed you will need to select the parameter used in the experiment i e e For Speed A to B select the distance between the sensor con
40. years old e Level 3 is aimed at exam level e g 15 years plus Step 5 An Interface option window will open Leave the Interface selection as EasySense Range and the method of connection as USB Port and select OK The program will save your selection so it will be automatically configured when next used Step 6 The Home window will open Select one of the experiment modes e g EasyLog Pictogram Meters Snapshot Counting or Timing Using Vu after the initial setup e Use the USB cable to connect Vu to the computer e Open the EasySense software program e Select one of the experiment modes e g EasyLog from the Home screen The EasySense software overview Home is the main navigation screen which contains the icons for all of a EASYSENSE Vu s logging options The experiment options and the complexity Home of toolbars and functions are altered by the user level selected Home Choose Experiment Type Home Choose Experiment Type Home Choose Experiment Type New Experiment EasyLog New Experiment New Experiment Pictogram rE SnapShot Counting Timing SnapShot Options SnapShot Options Options Exit Level 1 EasyLog EasyLog will open pre set to record sensor values continuously as a line graph until stopped Feal Tine Logging Wizard A logging wizard will open deselect the tick next to any sensors from which readings are not required and cli
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