Sense User`s Manual (v.3.0)
Contents
1. SENSE INTERFACE 009 USER S GUIDE CENTRE FOR MICROCOMPUTER APPLICATIONS http www cma science nl For our international customers Check the CMA International website www cma science nl english for the latest version of this manual and updates of Coach software products Aan onze Nederlandse gebruikers Sense wordt standaard uitgeleverd met Engelse handleiding U kunt de laatste versie van de Nederlandse handleiding en de nieuwste update van Coach downloaden van de CMA website www cma science nl Sense User s Guide ver 3 0 December 2014 Author Ewa Kedzierska CMA Amsterdam 2014 2 009 Sense User s Guide TABLE OF CONTENTS I GETTING ACQUAINTED 4 1 Introduction 4 2 Sense components 4 3 Sense operating system 5 4 Computer and software requirements 5 5 Attaching Sense to the computer 5 6 Resetting Sense 5 7 Connecting external temperature sensor 5 II USING SENSE WITH THE COMPUTER 6 1 Working with Coach 6 6 2 Working with sensors in Coach Activities with Sense 6 3 Working with actuators in Coach Activities with Sense 7 4 Example of a measurement with Sense and Coach 8 III TECHNICAL SPECIFICATIONS OF SENSE 10 1 Connection to the computer 10 2 Power Supply 10 3 Sampling rates 10 4 Memory 10 5 Sense sensors 11 Sa BERET OAD S E EEE 11 SAN OAT OET Oe EEE 11 5 2 lemperat re SenSOr metten ee neede edad 12 5 4 External tempera2. Start button to start a measurement 13 The measurement stops after the measuring time is reached or by clicking the red Stop button 14 Analyze the measured data All processing and analysis tools of Coach are available from the Diagram and Table Tool menus ft Coach 6 Lite 4 Measurements in Own Lab Own Lab cma Program Window Help N DAB ACO Sp bai SRA Een SEE 2 In this activity you can perform experiments with Sense You decide what kind of experiment you would like to set up and which sensor you will use 1 Drag a sensor icon from the sensor palette to its input on the screen panel Input 1 is used for the built in light sensor On the sensor palette there are three icons with different light intensity ranges available for this input Input 2 is used for the built in temperature sensor One temperature sensor icon is available for this input Input 3 is used for the external temperature sensor One external temperature sensor icon is available for this input Input 4 is used for the built in sound sensor On the sensor palette there are two icons available for this input one to measure the sound amplitude in Pa and one to measure the sound intensity in dB 2 To present the measured data in a graph a table on a meter or as a digital value right click the sensor icon on the panel select the way of presenting data and place it in one of the empty panes time 5 CH3 External temper
3. are going to investigate temperature variations of water in a beaker During this measurement Sense collects temperature data and the measured data are displayed on the screen in a graph a table and as a digital value The measured value is also displayed on the sensor icon on the Sense screen panel Materials e Sense with an external temperature connected e PC computer with the Coach 6 2 Lite e 250 mL beaker and 100 mL hot water Measurement procedure 1 Connect Sense to the computer 2 After Sense is detected Coach 6 Lite will start automatically and the Sense project will open 3 Open the project Weasurements in Own Lab and select the activity Own Lab Plug the external temperature sensor into the input of Sense 5 Drag the external temperature sensor icon from the sensor palette to input 3 of the Sense screen panel 6 Right click the icon and select Display as Diagram Place the diagram in one of the empty panes 7 Right click the icon and select Display as Table Place the table in one of the empty panes 8 Right click the icon and select Display as Value Place the value in one of the empty panes 9 Determine the room temperature 10 Filla beaker with hot water and place the temperature sensor in the water 11 Click the Measurement settings button and set the measuring time to 3 minutes and measurement frequency to 50 per second 8 009 Sense User s Guide 12 Click the green
4. this happens you have to reset Sense This can be done in two ways in the Coach software 1 When there is no communication on opening of a Coach Activity Results and the program displays the message that the panel Sense can not be initialized then unplug the interface and plug it in again after a few seconds or plug it into another USB port of your computer Press Retry in Coach 2 When the communication with the interface is lost while working in a Coach Activity Result then e Right click the Sense screen panel e Select the Reset Hardware option This option is only available if the Sense panel is active in Coach 7 Connecting external temperature sensor The external temperature sensor can be connected and disconnected at any time by connecting the plug of the external temperature sensor to the input for the external temperature sensor D at the front of the Sense interface 009 Sense User s Guide 5 Il USING SENSE WITH THE COMPUTER To use Sense with the computer you need a PC computer with the Coach 6 Lite or the Coach 6 program see 4 Computer and software requirements During the measurements Sense stays connected to the computer Sampled data are transferred in real time to the computer The course of the measurement can be followed directly in the Coach program 1 Working with Coach 6 When you work with Coach 6 Lite 6 2 or higher you can start the program by automatic interface
5. 120 C Technical data Measurement range 10 120 C Resolution using 12 bit A D converter 0 03 C 20 C 0 1 C 100 C Accuracy 0 25 C 20 C 0 4 C 100 C Rise time fall time 20 s for 99 of final value water Recommended max sample rate 1 kHz above the accuracy may degrade slightly 6 Sense actuators Sense has two built in actuators LED and buzzer The LED output can be set to 16 intensity levels and the buzzer output can generate 16 fixed tones 009 Sense User s Guide 13 Warranty The Sense is warranted to be free from defects in materials and workmanship for a period of 12 months from the date of purchase provided that it has been used under normal laboratory conditions This warranty does not apply if LAB has been damaged by accident or misuse Note This product is to be used for educational purposes only It is not appropriate for industrial medical research or commercial applications Rev 11 12 2014 14 009 Sense User s Guide
6. S rot x NX VY Ss NO LS LA EA a O O D O NO O ND O P O O Light sensor characteristics Left relative radiant sensitivity vs angular displacement Right relative spectral sensitivity vs wavelength in nm black line The sensitivity of the human eye is included for reference grey line 5 3 Temperature sensor The internal temperature sensor measures temperature in the range of 5 C to 45 C Because the processor and other components of Sense generate some heat the internal temperature of the interface will rise by 3 to 4 C over a period of approximately 45 minutes The internal temperature sensor will measure this temperature rise The name of the internal temperature sensor in the Coach Sensor Library is Temperature sensor 009 CMA 5 45 C 12 009 Sense User s Guide Technical data Measurement range 5 45 C Resolution using 12 bit A D converter 0 02 C 20 C 0 1 C 100 C Recommended max sample rate 1 kHz above the accuracy may degrade slightly 5 4 External temperature sensor To the additional input bus of Sense an external temperature sensor can be connected included in the package This sensor can be used for temperature measurements in air or fluids It measures temperature in the range of 10 120 C The name of the external temperature sensor in the Coach Sensor Library is External temperature sensor 009 CMA 10
7. anel There are three sensor icons available in the Coach Sensor Library with different light intensity ranges 0 1500 Ix O 15 klx and 0 150 klx If you miss a sensor icon on the sensor palette in Coach Activity you have to add it manually from the Coach Sensor Library 6 009 Sense User s Guide e Click an empty place on the sensor palette click Select from Library select the desired sensor from the list and click OK e Drag a sensor icon from the sensor palette to its input on the Sense screen panel e Calibrated signal values measured by the sensor will be displayed on the icon gt 5 Ek l a T gt 1 2 Pal ab 1 781 Ix EREN Sound sensor 009 CMA 9 5 9 5Pa l Seles Light sensor 009 CMA 0 15001x Sometimes it is useful to count signal changes of an analog sensor as pulses e g to measure how often the screen is refreshed using a light sensor as counter With Sense it is possible to define analog sensors as counters If the analog signal of such a sensor crosses a specified value threshold in a predefined direction the counter is incremented by one For detailed information see Guide to Coach 6 Lite or Guide to Coach 6 3 Working with actuators in Coach Activities with Sense Sense has two built in actuators the LED and the buzzer which can be used as actuators in simple control experiments The Sense actuators can be activated in C
8. ature sensor m x 64 6 C Junior student Own lab Activity Coach 6 1 2004 2006 CMA 009 Sense User s Guide 9 III TECHNICAL SPECIFICATIONS OF SENSE 1 Connection to the computer Sense is connected to the PC via a USB port Heb connection Compatibility USB 1 0 USB 1 1 USB 2 0 Max transfer rate 64 kB s 2 Power Supply Sense is powered from the USB power supply Power consumption of the interface with no sensors connected is max 50 mA 3 Sampling rates The maximum sample rate depends on the number of active sensors and the way they are used In normal mode the interface can take one sample every 100 us This means that one sensor can be sampled at 10 kHz and two sensors can be sampled at 5 kHz Sample rates can be chosen in units of 100 us so possible rates are 10 kHz 5 kHz 3 3 kHz 2 5 kHz 2 0 kHz 1 67 kHz etc In fast mode the interface takes one sample every 25 us sample rate 40 kHz During fast mode only one sensor actuator can be active Counter operation is possible for one sensor at a time This sensor is monitored every 200 us to determine if the sensor signal has passed the set threshold value up or down This means that the minimum width of a pulse that must be counted is 200 us The maximum frequency of a signal to be counted is 2 5 kHz in case of a symmetric signal Counter operation is not available in fast mode The table below gives an overview Number of inputs use
9. d Maximum sample rate one sensor active at a time Sound and light sensors max 10 kHz in normal mode 40 kHz in fast mode Temperature sensors max 5 kHz two sensors active at a time max 5 kHz three sensors active at a time max 2 5 kHz four sensors active at a time max 2 5 kHz one active counter 2 5 Hz max signal frequency 4 Memory Sense is equipped with Flash non volatile memory which contains the internal operating system firmware Flash memory can be rewritten to update the firmware For buffering of sampled data Sense is equipped with 32 kB of RAM memory which can contain maximal 16 000 samples 10 009 Sense User s Guide 5 Sense sensors 5 1 Sound sensor The Sense sound sensor measures variations in air pressure caused by sound The sound sources that can be used with the microphone are tuning forks electronic keyboards and musical instruments You may also investigate a human voice ora whistle When you use the sound sensor make sure the sound level is in the correct range to produce good wave patterns If the sound is too loud the wave pattern will be clipped off at the top or bottom In such a case move the microphone further from the sound source or turn down the volume of the sound The sensor can also be used for sound level measurements dB measurements There are two Sense sound sensors available in the Coach Sensor Library Sound sensor 009 CMA 9 5 9 5 Pa for ai
10. oach Activities with Sense by dragging sensor icons to proper outputs of the Sense screen panel The Outputs of the Sense sensor icons can be found on the actuator palette screen panel or in the Coach Actuator Library The Sense screen panel has two outputs Output 1 is used for the built in LED Output 2 is used for the built in buzzer If you miss an actuator icon on the actuator palette in Coach Activity you have to add it from the Coach Actuator Library e Click an empty place on the actuator palette click Select from Library select the desired actuator from the list and click OK e Drag an actuator icon from the actuator palette to its output on the Sense 009 Sense User s Guide 7 screen panel e Click the small icon next to the actuator icon to manually toggle actuator on or off e With the power slider on the actuator icon you can adjust its power level Click an arrow at the right side of the actuator icon to increase or decrease the power The height of the red bar indicates the level of the output In this way you can adjust the LED brightness and you can generate different buzzer sounds 4 Example of a measurement with Sense and Coach Guided by this step by step tutorial you can perform your first temperature measurements with Sense and its external temperature sensor Before you start make sure that the Coach 6 2 Lite software is installed on your computer In this experiment you
11. ower supply ZANMmMoO 4 009 Sense User s Guide 3 Sense operating system Sense is equipped with an internal operating software firmware The firmware is stored in FLASH memory which allows easy update of Sense operating system The firmware update can be performed manually by using CMA Firmware Update program or automatically via Coach 6 and Coach 6 Lite Coach recognizes automatically when a connected Sense need to be updated and offers direct update For the latest versions of CMA software check the website www cma science nl 4 Computer and software requirements To use Sense with the computer you need Coach 6 or Coach 6 Lite version 6 2 or higher running on a Pentium III computer with Win 2000 XP Vista Win 7 with at least 192 MB RAM recommended 256 MB and unused USB port 5 Attaching Sense to the computer To connect Sense to your computer simply plug its USB plug into a free USB port of the computer The LED of the interface will switch on for a short period of time This means that the interface initializes Windows might show a notice that a new USB device is found After Sense is detected Coach 6 Lite will start automatically and the Sense project will open Automatic detection of Sense can be switched off by right clicking the Coach 6 icon in the taskbar and selecting Stop 6 Resetting Sense It may happen that the communication between Sense and the computer is lost If
12. r pressure measurement Sound sensor 009 CMA 50 110 dB for dB measurements Technical data Measurement ranges 9 5 9 5 Pa 1 kHz 50 110 dB Frequency range 100 16 000 Hz Resolution using 12 bit A D converter 4 6 mPa 1 kHz Max sample rate air pressure measurements sound level measurements Max useful sample rate 100 Hz for sound level measurements 5 2 Light sensor The Sense light sensor is a high sensitivity sensor to measure light intensities in three different ranges 0 1500 lux O 15 000 lux and 0 150 000 lux The light sensor has an excellent linear response and is equipped with a built in color correction filter giving an approximation to the spectral response of the human eye There are three Sense light sensors available in the Coach Sensor Library Light sensor 009 CMA 0 1500 lux Light sensor 009 CMA 0 0 15 Klux Light sensor 009 CMA 0 O 150 klux If you choose a sample interval that is shorter than the wavelength of the sound to be measured the measured sound level will not be representative of the true sound level 009 Sense User s Guide 11 Technical data Measurement ranges O 1500 lux 0 15 Klux O 150 Klux Resolution using 12 bit A D 0 37 lux 0 1500 lux range converter 3 7 lux 0 15 klux range 37 lux 0 150 klux range Temperature coefficient 0 05 C Max sample rate AT l SU SS
13. recognition Plug your Sense into the USB port after the interface is detected Coach 6 Lite will start and the Sense project will open When you work with Coach 6 6 2 or higher then you have to open Coach via Windows Start menu or via double clicking a Coach Activity file cma a Coach Result file cmr or a Windows shortcut to such file Extensive information on working with Coach 6 Lite and Coach 6 can be found respectively in the Guide to Coach 6 Lite and Guide to Coach 6 manuals and in the on line Coach Help System 2 Working with sensors in Coach Activities with Sense Sense has three built in sensors to measure temperature sound and light The additional external temperature sensor can be connected to the input The Sense sensors can be activated in Coach Activities with Sense by dragging sensor icons to proper inputs of the Sense screen panel The sensor icons can be found on the sensor palette or in the Coach Sensor Library The Sense screen panel has 4 inputs Input 1 is used for the built in sound sensor There are two sensor icons available in the Coach Sensor Library one to measure the sound amplitude 9 5 9 5 Pa and one to measure the sound intensity 50 110 dB Input 2 is used for the built in temperature sensor 5 45 C Input 3 is used for the external temperature sensor 10 120 C Inputs of the Input 4 is used for the built in light sensor Sense screen p
14. ture SONS OE anssen tt 13 6 Sense actuators 13 009 Sense User s Guide 3 GETTING ACQUAINTED 1 Introduction The CMA Sense is an easy to use USB lab interface with three built in sensors to measure temperature sound and light To the additional input an external temperature sensor included in the package can be connected The built in LED and speaker can be used as actuators in simple control experiments Sense is connected directly to the computer through a USB port The interface is equipped with its own processor and memory enabling fast measurements with accurate timing The FLASH memory allows easy upgrade of the internal system software 2 Sense components The Sense package contains the Sense interface the external temperature sensor and the Sense Coach 6 Lite CD Sense is provided with see figure above A Sound sensor with two measuring ranges 9 5 9 5 Pa and 50 110 dB B Light sensor with three measuring ranges 0 1500 lux 0 15 kilolux and O 150 kilolux Placed inside the housing temperature sensor with measuring range 5 45 C Input for the external temperature sensor External temperature sensor with measuring range 10 120 C LED indicating interface initialization and which can also be used as an actuator Placed inside the housing buzzer for control activities USB cable Sense is powered via the USB port and does not need an extra p
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