What s in the box?... 2 What else is required?... 3

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1 CONTENTS What s in the box? What else is required? The EasySense Q data logger EasySense Q s buttons The built-in sensors Plug-in sensors Ways to Capture Data with EasySense Q Using EasySense Q in standalone operation Meter Snapshot EasyLog Timing Using EasySense Q connected to a computer for the first time Using EasySense Q connected to a computer after the initial setup Technical Information for EasySense Q System Menu Selecting the sensor range Factory Reset Battery level check Powering EasySense Q Automatic Standby Internal Clock and Calender EasySense Q s memory Specifications Care & Maintenance Trouble Shooting Practical information for the plug-in Temperature Sensor Copyright: all rights reserved. This manual may be copied for use within the premises 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 error 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: DO144 Issue 1 1

2 What s in the box? The EasySense Q 3 or 5 data logger A power supply unit (UK version shown) A USB communication cable Two plug-in Temperature Sensors Two long Smart Q sensor leads Note: As EasySense Q connects via a USB compatible port, it is only suitable for use on a computer with an operating system that supports USB e.g. 98SE, 2000, Me and XP. It will not be supported by Windows 95, 98 or Windows NT (workstation and server). 2

3 What else is required? Sensing Science Laboratory or Primary software a specific application that allows transfer of the captured data to a computer for display and analysis and has the USB drivers for EasySense Q (these are located on the Sensing Science Laboratory or Primary CD ROM). Note: To use EasySense Q you will need Issue 4 or higher of the Sensing Laboratory or Primary PC Windows software (Product No or 6489 respectively) V1.09 i.e. Graph V2.51, Meter V1.35, Timer V1.24, Workroom V1.22. The EasySense Q data logger EasySense Q is a fully self-contained portable data logger. It has built-in sensors, which allow collection of data. The current measurement from a sensor can be viewed on the LCD screen. Data can be gathered either when EasySense Q is connected to a computer or stored as data sets in its memory for retrieval and analysis by the computer at a later date. Up to four data sets can be stored at a time. Inputs for plug-in sensors (dual labelled as 1A and 2B) Q 3 & 5 - built-in Light sensor (visible in square slot) Q 3 & 5 - built-in Sound sensor (grid visible) LCD Display H VE DATA AR T S 1 A INPUT 2 B Q 3 & 5 - built-in Temperature sensor (not visible) USB compatible input Power light Connection for power supply POWER Q 5 only - built-in Barometric Pressure sensor (not visible) Meter Snapshot EasyLog Timer EASYSENSE DATALOGGER Q 5 Red square (STOP button) Green triangle (ENTER/SELECT button) Yellow arrow (SCROLL down button) Q 5 only - built-in Humidity sensor (grid visible) EasySense Q buttons EasySense Q has three buttons that are used to select the operating mode. The green triangle (ENTER) is used to start data collection, to confirm a choice or take a sample. The red square (STOP) is used to end data being recorded or return to the main menu. 3

4 The yellow arrow (SCROLL) is used to scroll through menus on the LCD screen or to browse measurements during data logging. EasySense Q has no ON/OFF switch. To operate, press any of the buttons on the top panel. The built-in sensors EasySense Q 3 has three built-in sensors and Q 5 has five. They are: Built-in Sensors Range EasySense Q 3 EasySense Q 5 Sound 40 to 110 dba!! Light level 0 to lux 0 to lux Temperature -30 to 110 C!! Barometric Pressure 0 to 110 kpa "! Humidity 0 to 100% RH "!!!!! The information from the built-in sensors are shown on the LCD display numbered from three onwards. Number one and two are reserved for plug-in sensors - these will not appear in the list unless there is a sensor plugged into the input/inputs. 3) 46.9 dba 4) 69 1x 5) C The sensors built-in to EasySense Q are analogue devices. 3) Sound Sensor Range: 40 to 110 dba. Used to measure the level of sounds. Responsive to both single sounds (such as a whistle or handclap) and continuous background noise (such as passing traffic, classroom noise). 4) Light Level Sensor Range 1: 0 to lux Range 2: 0 to lux (0 100 klux) There are 2 ranges to choose from (see page 13 for altering the selected range). The lower range ( lux) is more responsive and therefore more suitable for recording at indoor light levels. The larger range ( lux) is more suitable for recording the light level outdoors. 5) Temperature Sensor Scale: - 30 to 110ºC Used to measure the temperature of EasySense Q s environment. Notes: For convenience the built-in temperature sensor is displayed on the same scale as the plug-in temperature sensors. In fact EasySense Q can only be used in an environment of 0 to 40 C, 0 to 95%RH (non-condensing). The speed of reaction to a change in temperature will be delayed by EasySense Q s plastic case. 6) Barometric Pressure Sensor Range: 0 to 110 kpa (EasySense Q 5 only) For weather and pressure investigations. 4

5 7) Humidity Sensor Range: 0 to 100% Relative Humidity (EasySense Q 5 only) For weather and environmental investigations. Plug-in sensors EasySense Q is supplied with: # 2 plug-in temperature sensors and # Two long sensor leads. Plug-in sensors connect to the two inputs on EasySense Q labelled as 1A and 2B. When a sensor is connected it will automatically be detected and displayed on the LCD screen (in Meters) as number 1) and/or 2) (depending on which input the sensor is connected to). The plug-in sensor inputs are dual labelled as A and B because the Timer software is specified in these terms. The plug-in temperature sensors Plug the temperature sensor into one of the external inputs on the back of EasySense Q (labelled 1A or 2B) with the locating arrow facing upwards. EasySense Q will automatically detect that a temperature sensor is connected and display temperature values in degrees Celsius. The plug-in temperature sensors are supplied calibrated with a range of -30 to 110ºC. Temperature measurements are taken by a thermistor, which is housed at the tip of a stainless steel tube. The stainless steel tube is made from AISI 316 stainless steel, which has a particularly low thermal inertia with a negligible effect on the measured temperature. It provides a high level of resistance to corrosion from a wide variety of weak acids and alkalis, making it suitable for use with experiments in chemistry, biology, physics, earth and environmental science. See page 17 for further practical information about the temperature sensor. The Sensor leads Two long sensors leads have been provided for use with Smart Q sensors that are available to purchase separately and are not supplied with EasySense Q. Smart Q sensors can be divided into two main types: 1. Analogue which are used to measure physical quantities such as temperature, sound, light, ph, etc. 2. Digital - which are switch-type sensors for measuring ON/OFF conditions such as light gates and timing mats used for calculating time, speed and accelertion. Smart Q ph Adaptor and Electrode Please contact our sales office for an up-todate list of Smart Q Sensors. Smart Q Light Gate Sensor 5

6 Ways to Capture Data with EasySense Q There are different ways that EasySense Q can be used to collect data. 1. Real time, in this mode EasySense Q 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 applications in the Sensing Science software. This method of collection is useful for many classroom-based experiments. 2. In Remote, in this mode EasySense Q is used to collect and store data while disconnected from the computer. Data collection can either be setup using EasySense Q s menu options (e.g. EasyLog, Snapshot or Timing see stand-alone operation below) or setup via the Graph program in the Sensing Science software to log data for a set time period. The data collected in remote mode is stored in EasySense Q s memory to be retrieved by the computer at a later date. Up to 4 sets of data can be stored in EasySense Q s memory. Once the four sets have been stored EasySense Q will overwrite the earliest data set with the new set of data collected. Using EasySense Q in standalone operation EasySense Q has four working modes, displayed on the built-in LCD screen, which can be used to collect data without being connected to the computer. These are Meter, Snapshot, Easy Log and Timer modes. Note: Some of the following examples show the effect seen on the LCD screen when there is no sensor plugged into Input 2 (number 2 will be omitted from the list). Meter 1) C 3) 57.2 dba 4) 183 1x 5) C Use the yellow arrow to scroll through the sensors Snapshot No. Taken: 3 3) 57.2 dba 4) 185 1x 5) C Press the green triangle to take a sample No. Taken: 4 3) 59.3 dba 4) 190 1x 5) C Easy Log 1) C 3) 62.2 dba 4) 200 1x Timer Use the yellow arrow to select either mode Set Timing Mode Timing A to B Timing at A Timing at A Samples Taken: ms A time measurement is displayed for each event 6

7 Meter In this mode EasySense Q will continuously display fully calibrated measurements from the active sensors (built-in and any plug-in sensors connected) on the LCD screen but will not store any data. The display is updated every half second. # Connect any plug-in sensors if required. If the display is turned off, press the green triangle or yellow arrow button to wake up EasySense Q. # Use the yellow arrow button to scroll the cursor down until it is pointing at Meter. Meter Snapshot EasyLog Timer # Press the green triangle (enter) to select Meter. Scroll can be used to view data from the active sensors. # Press the red square (stop) to exit Meter mode and return to the main menu. Snapshot Snapshot mode enables you to capture and store specific data points as a set of data that is stored in EasySense Q s memory. # Connect any plug-in sensors if required. If the display is turned off, press the green triangle or yellow arrow button to wake up EasySense Q. # Use the yellow arrow button to scroll the cursor down until it is pointing at Snapshot. # Press the green triangle (enter) to select Snapshot mode. Meter Snapshot EasyLog Timer # Each time you press the green triangle on EasySense Q a reading will be taken from all active sensors (built-in and any plug-in sensors No Taken: 3 0 connected). EasySense Q will display the number of 1) 25.6 C samples taken so far and the current value from the 3) 54.8 dba 4) 178 1x active sensors. If more than 2 minutes have elapsed between readings, then EasySense Q will go into sleep mode, press to wake up the unit and then to take a reading. Scroll can be used to view data from the active sensors. # Press the red square (stop) to exit Snapshot mode and return to the main menu. The readings taken will be stored as a set of data. Over 600 samples can be stored in one data set. The data set can be downloaded to the computer for display and analysis using the Collect remote data option in the Sensing Science Graph program (see the manual that accompanies the Sensing Science software). Easy Log In Easy Log mode data is collected from all active sensors (built-in and any plug-in sensors connected). It is not necessary to set the duration of the recording EasySense Q will capture data until stopped. The data set will then be stored in EasySense Q s memory. 7

8 # Connect any plug-in sensors if required. If the display is turned off, press the green triangle or yellow arrow button to wake up EasySense Q. # Use the yellow arrow button to scroll the cursor down until it is pointing at Easy Log. Meter Snapshot EasyLog Timer # Press the green triangle (enter) to automatically begin recording from all built-in and plugged-in sensors. Scroll can be used to view the values from the active sensors on the LCD screen whilst still logging. # When the investigation is complete press the red square (stop). EasySense Q will continue to log data until you press the green triangle (enter) to confirm your choice. The data recorded will be stored as a set of data. Note: If the Stop button was not pressed intentionally, press the red square (stop) to continue logging. # A Finished message will be displayed, press the green triangle (enter) to return to main menu. The data set can be downloaded using the Collect remote data option in the Sensing Science Graph program (see the manual that accompanies the Sensing Science software). Once started EasySense Q records data at a rate of 40 samples per second until it has captured 1000 samples. At this point the sample rate halves (i.e. 20 samples per second) and every other sample is discarded (leaving 500 samples). It will continue at this speed until it has captured another 500 samples (1000 total) then the sample rate halves (i.e. 10 samples per second) and discards half the stored data, and so on. EasySense Q will continue to record data for up to 30 days. In EasyLog mode the EasySense Q will stay awake until the interval between readings reaches 5 seconds or greater at this point it will begin to use low power (sleep) mode between samples to conserve battery power. Duration Sample Interval Rate (seconds) Samples Days Hours Min Sec 40 per second per Compress to a half 0.05 second per Compress to a half 0.1 second per Compress to a fifth 0.5 second per Compress to a half 1 second Every Compress to a fifth 5 5 seconds Every 15 seconds 15 Compress to a third Every 30 seconds 30 Compress to a half Every Compress to a half 60 1 minute Every Compress to a fifth minutes Every Compress to a minutes third Every Compress to a half minutes Every Compress to a half hour

9 When EasySense Q is in sleep mode the current value from the active sensors can be viewed by pressing the yellow button. Whilst in EasyLog mode the samples taken, current logging interval and the time started can be viewed at any time by pressing the green enter button. Sample Taken: 269 Interval: 500ms 01/05/04 09:16:31 When the sample interval is greater than or equal to one second (after logging for 6 minutes), it is possible to download data from EasySense Q to a computer to check its validity without interrupting the recording using the Collect remote data option in the Sensing Science Graph program (see the manual that accompanies the Sensing Science software). Note: If you would prefer to record remotely for a specified time span then EasySense Q needs to be setup to record using the remote record option in the Sensing Science Graph program (see the manual that accompanies the Sensing Science software). Timing Used to setup and store simple time measurements from either one digital switch type sensor connected to Input A or two connected to Input A and Input B. Switch type digital sensors e.g. a light gates have two states, low (ON) or high (OFF). The time measurement taken by EasySense Q is for an object at Input A or from an object travelling from the sensor at Input A to the sensor at Input B. Upon completion of the timing event the elapsed time will be displayed in milliseconds on the LCD screen (to 2 decimal places). # Connect the digital sensor/s to Input (1)A or Input (1)A and (2)B. If the display is turned off, press the green triangle or yellow arrow button to wake up EasySense Q. # Use the yellow arrow button to scroll the cursor down until it is pointing at Timer. # Press the green triangle to select. # Use the yellow arrow to scroll the cursor until it is pointing at either Timing A to B or Timing at A. Press the green triangle to select. EasySense Q will be ready to start taking measurements. When a signal change from the digital sensor/sensors is received, the time taken for the signal change at Input A or A to B will be displayed in milli seconds (ms) on the LCD screen. EasySense Q will then be ready to take the next measurement. Meter Snapshot EasyLog Timer Set Timing Mode Timing A to B Timing at A Timing A to B Samples Taken: ms # Press the red square (stop) to finish or cancel any pending timing event. Press the green triangle (enter) to return to the main menu. The measurements taken will be stored in a data set. Note: During Timing mode, EasySense Q will stay awake and fully powered at all times. 9

10 The data set can be downloaded for display and analysis using Collect remote data from the Collect menu in the Sensing Science Timer program (see the manual that accompanies the Sensing Science software). Note: The data is collected as a TIME measurement. For calculating any measurements other than Time and Speed from A to B, the Sensing Science Timer program must be running in Advanced mode. For the software to be able to calculate the speed, velocity or acceleration, it is necessary to enter the parameters used i.e. the distance from A to B or the length of the interrupt card used. Using EasySense Q connected to a computer for the first time Step 1: Install the Sensing Science Laboratory or Primary software if it is not already on your computer. For details of how to install and operate this program, please refer to the manual that accompanies the Sensing Science software. Make sure EasySense Q is not connected to the USB port during installation. Note for existing Sensing Science Primary or Laboratory users: If you have an earlier version of Sensing Science on your computer, it is best removed before commencing installation of a later version (i.e. use Add/Remove programs in the Control Panel accessed via Start/Settings). Step 2: Install the EasySense Q USB drivers The first time EasySense Q is attached to a computer the USB drivers will need to be installed. Note for Windows 2000 and XP users: You need to be logged on as administrator (or with equivalent access rights) to install the EasySense Q USB drivers. # Insert the Sensing Science Primary or Laboratory CD ROM into the CD Drive. Cancel the auto run program. # Connect the square USB plug of the USB communication cable to the USB compatible input on the side of EasySense Q. # Connect the flat USB plug to a USB compatible port on your computer. # Windows will automatically detect that a new device has been connected and a Wizard will be generated to aid installation. Window 98 users: Select Specify a location and use the Browse button to browse for the EasySense Q driver folder on the CD and click on OK. Next Windows 2000 and XP Users: Select to install the software automatically. Windows XP users: You may be warned that the drivers have not passed Logo signing, please continue anyway at this point. # When installation is complete, eject the CD ROM and store safely. Step 3 Check that the LCD screen on EasySense Q is displaying the main menu. EasySense Q will not communicate with the PC if it is performing any kind of recording. If the LCD screen shows samples being taken press the red square (stop) button and finish the recording. Meter Snapshot EasyLog Timer 10

11 Launch one of the Sensing Science logging programs i.e. Meters, Graph, Workroom or Timer. The first time one of the programs from Sensing Science is used an Interface option window will open. Select the Interface as EasySense Q and Link. Click on OK. The program will save your selection so it will be automatically configured when next used. Note: There is no need to switch EasySense Q on, as the computer will automatically assume control. The internal and any plug in sensors connected will automatically be recognised and calibrated. Using EasySense Q connected to the computer after the initial setup # Connect EasySense Q to the USB port on the computer using the USB cable supplied. # Launch the appropriate Sensing Science program. The internal and any plug in sensors connected will automatically be recognised and calibrated. For information on using EasySense Q with the Sensing Science programs refer to the manual supplied with the Sensing Science CD ROM. Sensing Science programs overview Meters This application displays live data from analogue sensors in four different ways. Designed to introduce students to the idea of sensing data and interpreting information. The program will open with a blank display window, click on the appropriate picture icon to open a section window i.e. Gauge, Colour Change, Bar or Number. Double click in a section window and select the sensor to display from the list. 11

12 Graph Collect remote data option This application is used for recording and graphing signals from sensors. There are facilities for analysing data, setting the recording method, and retrieving the data sets stored in EasySense Q. The New recording Wizard is used to set the available options before data is captured e.g. real time or remote recording, length of recording, deselecting built-in sensors,etc. The Start icon is used to begin a recording Sensor Config This application can be used to alter the range of the built-in light sensor on EasySense Q or those Smart Q sensors that have either multiple ranges or are capable of user calibration. Timer This application is used to allow students to study Time, Velocity and Acceleration relationships using of digital (switch-type) sensors and retrieval of Timer data sets stored in EasySense Q. Workroom The purpose of this application is to allow the selection of experimental worksheets. The worksheets can be written by the user or purchased as pre-prepared HTML files. These HTML files can be loaded into a word processor and then customised by the user. 12

13 Technical Information for EasySense Q System Menu A system menu is accessed from the main menu. This will allow you to change the range of a sensor, apply a factory reset and check the battery condition. To prevent accidental change this menu can only be accessed if the user holds down both the red square and yellow arrow buttons for 2 seconds. Selecting the sensor range The internal light sensor in EasySense Q and some plug-in Smart Q Sensors have more than one range. The range can be altered either on EasySense Q (see below) or on the computer by using the Sensor Configuration application in the Sensing Science program. Once selected EasySense Q will use this range or units (until they are reselected). Whilst in the main menu hold down the red square (stop) button and then the yellow arrow (scroll) button and keep them both held down for 2 seconds. The display will alter to show the System menu i.e. Battery Level, Set Sensor Range and Factory reset. Use the yellow arrow to scroll the cursor until it is pointing at Set Sensor Range. Press the green triangle button to select. Use the yellow arrow button to scroll the cursor until it is pointing to the relevant sensor i.e. the internal light sensor or the Smart Q Sensor connected to external 1A or 2B. Press the green triangle (enter) to select. An asterisk (*) will indicate the currently selected range. Use the yellow arrow to scroll the cursor down until it is pointing at the required range. Press the green triangle (enter) to select. The asterisk will move to indicate the selected range. Press the red square (stop) to return to the system menu and then again to return to the main menu. Factory Reset To reset EasySense Q back to its factory default condition i.e. clear all memory (all stored data sets will be deleted) and set the built-in light level sensor range to the lux range. Whilst in the main menu hold down the red square (stop) button and then the yellow arrow (scroll) button and keep them both held down for 2 seconds. The display will alter to show the System menu i.e. Battery Level, Set Sensor Range and Factory reset. Use the yellow arrow button to scroll the cursor down until it is pointing at Factory reset. Press the green triangle (enter) to select. A check message will warn that this reset will delete all data sets - press the green triangle (enter) to confirm your choice or press the red square (stop) to cancel. A message will confirm if the reset has been done, press the green triangle to the main menu. to return 13

14 To check the battery level in EasySense Q If EasySense Q has been on charge, disconnect the power supply and/or USB cable for at least 15 seconds to obtain a true value. Whilst in the main menu hold down the stop button and then the scroll button and keep them both held down for 2 seconds. The display will alter to show the System menu i.e. Battery Level, Set Sensor Range and Factory reset. Use the yellow arrow button to scroll the cursor down until it is pointing at Battery Level. Press the green triangle (enter) to select. EasySense Q will determine the power requirements of the sensors connected and the charge level of the batteries. The LCD will display: Line 1. The Battery Life awake the number of hours EasySense Q could continuously operate without a power supply attached e.g. for Timer readings collected by the unit. Line 2. Battery Life Easy Log - some methods of logging i.e. EasyLog or Remote, will switch EasySense Q into sleep mode between samples to reduce power consumption. This line will indicate whether there is sufficient charge to record in this mode for at least 30 days (OK) or if a recharge is advised. Line 3. Will indicate the capacity of the battery. Line 4. Will show as charging if power is being supplied to EasySense Q (via a power supply or USB connection). Press the red square (stop) to return to the system menu and then again to return to the main menu. Note: Ideally EasySense Q should be stored at about 40% or more state-of-charge. Do not store EasySense Q with its battery fully discharged. Some reserve charge is needed to keep the battery and its protection circuit operational during prolonged storage. Powering EasySense Q EasySense Q can be powered by: 1. Using the mains power supply provided. 2. By the USB compatible port (whilst connected to the computer). 3. By its internal batteries (when charged). The power light on EasySense Q will only light when the unit is accepting power from the attached mains power supply or via the USB link. Mains Power The power supply unit supplied is used to power EasySense Q while it is connected to the computer and to recharge its internal batteries in preparation for logging data away from the computer. Power supply specifications are: AC regulated linear adaptor, 5V DC, able to source at least 500mA with a 2.5mm plug (positive centre and negative outer pin). _ + 14

15 Batteries EasySense Q is factory fitted with a lithium ion battery pack. When the batteries are fully charged they will power EasySense Q in Easy Log or remote mode for at least 30 days. Whenever EasySense Q is connected to the mains power supply or the USB compatible port on the computer, it will automatically re-charge the batteries. A full charge will take approximately 12 hours. Notes: # The drivers for EasySense Q must be installed before a link (and therefore charging) is established. # If the computer is switched off or in sleep mode, charging via the USB port will stop. # EasySense Q 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 Q requires an output current of 500mA). An extension cables must be of a single direct port extension type. Lithium-ion batteries are memory-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 EasySense Q should be stored at about 40% or more state-of-charge. Do not store EasySense Q with its battery fully discharged. Some reserve charge is needed to keep the battery and its protection circuit operational during prolonged storage. If EasySense Q is to be stored for lengthy periods without use then it s a good idea to recharge the batteries every 4 8 weeks. The speed at which a lithium-ion battery will age is governed by both its storage temperature (preferably less than 40ºC) and state-of-charge. 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 will demonstrate the need for replacement. When this happens contact Data Harvest and request a battery replacement pack for EasySense Q Product No Automatic Standby EasySense Q has no ON/OFF switch. To operate, press any one of the buttons on the top panel. When EasySense Q is disconnected from the power supply or USB port, it will go into low power sleep mode to reduce power consumption if more than two minutes have passed since any measurements have been taken or a button was pressed. EasySense Q will wake up either when a button is pressed or will auto-wake up when communicating with the computer. While remote recording EasySense Q will stay awake until the interval between readings reaches 5 seconds or greater at this point it will begin to use low power (sleep) mode between samples (waking up just enough in front of the sample time to allow the sensors to stabilise). While using Timer mode on the unit, EasySense Q will stay awake and fully powered at all times. Internal Clock and Calender EasySense Q internal clock will be updated automatically by the computers clock (date 15

16 and time) each time it is connected to the computer and one of the Sensing Science programs is run. Note: If the date or time on a data set is not correct, check the date/time settings on your computer. EasySense Q s memory EasySense Q s memory space is divided into 4 data slots and so can store four investigations that have been collected in standalone mode (when not connected to the computer). Each slot is filled in turn. Once the 4 th slot is used EasySense Q will begin to overwrite existing data starting at memory slot 1 (the earliest data set). The experiments are identified by date; time & logging type i.e. Easy Log, Snapshot Meter, Timer or Remote and duration. Specifications 4 x 20 Character LCD Display. USB compatible communication V1.1. Memory Capacity: 4 x data sets. Rate: 50 samples per second max logging speed. Digital timing from A to B accurate to 2 decimal places. 10 bit sampling resolution. Note: Smart Q Sensors are capable of 12 bit resolution. Specifications stated for Smart Q Sensors are applicable to when used with a 12 bit data logger or interface e.g. EasySense Advanced. EasySense Q is a 10 bit data logger so may not be able to fully utilise this capability and the resolution stated for each Sensor may not be as high. Care & Maintenance Clean with a damp cloth, do not immerse in water or detergent. EasySense Q 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. EasySense Q is not waterproof. Apart from the battery pack there are no user serviceable parts inside EasySense Q. Trouble Shooting Before reporting a fault please attempt a HARD RESET of the unit. 1. Connect to the mains power supply. 2. Hold down the three buttons (green triangle, red square and yellow arrow) for a second then release. + + If the hard reset has been done correctly, the LCD will momentarily display EasySense Q before returning to the main menu. If you are experiencing a problem, please contact the Technical Support department at Data Harvest. Please provide details of: # The computer platform it is being used with. 16

17 # The software version number # A description of the problem being encountered If possible, telephone from a location where you can operate EasySense Q with the computer. Practical information for the plug-in Temperature Sensor # It is the tip of the sensor that is sensitive to temperature. Lay the sensor on its side, not its end, when measuring a surface temperature. # Temperatures higher than 150ºC may damage the sensor. # The PVC insulation on the connecting cable has a working range of -10 to 85ºC, so keep this cable away from the source of heat e.g. by clamping the sensor in position. # Do NOT put any part of the sensor in a direct flame or on a hot plate. # Avoid submerging the sensor beyond the stainless steel portion. # Wash the sensor thoroughly after use. # The boiling point of water will vary with changes in air pressure. At one atmosphere of pressure (101.3kPa, 1013mBar) pure water boils at 100ºC. 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 Temperature in 0 C Pressure in kpa Pressure in mbar # AISI 316 stainless steel 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. The sensor can be left in an alkaline solution such as Sodium Hydroxide (NaOH) for up to 48 hours, with only minor discolouration. We do not recommend use in a solution whose concentration is greater than 3M. 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 sensors be left to soak in acids of between 1-3M concentration for longer than 48 hours. The exceptions to this rule are Hydrochloric acid (HCl), and Sulphuric Acid (H2SO4). The maximum recommended times for exposure are: 1M HCl 20 minutes 1M H2SO4 48 hours 2M HCl 10 minutes 2M H2SO4 20 minutes 3M HCl 5 minutes 3M H2SO4 10 minutes Suggested Investigations: Monitoring indoor and outdoor temperature. Weather studies. Insulation studies. Monitoring endothermic and exothermic reactions. Solubility of salts. Studying freezing and boiling points. Cooling rates. Evaporation, radiation, conduction and convection investigations. 17

18 Warranty EasySense Q 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 the EasySense Q has been damaged by accident or misuse. In the event of a fault developing within the 12-month period, EasySense Q 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 Limited are fully compliant with WEEE legislation and are 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. 18

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