The e-corder - Measurement Systems Ltd
Contents
1. NN lt lt lt 20000 33 ooo lt lt 333 lt lt lt 15 V 1 MO 47 pF DC Anti aliasing 20 kHz fixed 2nd order Other digital filtering options in software DC or 0 1 Hz software selectable 20 kHz O 10 Y full scale all ranges e corder 29 DC drift CMRR differential Input crosstalk Input noise Pod connectors Supply voltage Maximum current Communications Signal input Connector type Sampling Input resolution Linearity error Maximum sampling rates Available sampling rates Output Amplifier Output configuration Maximum output current Software corrected 96 dB 50 Hz typical 110 dB typical lt 2 4 pV ms referred to input DC to 20 kHz Combine power I C and single ended or differential analog input signals on one connector support pods particular transducers etc 5 V regulated 50 mA per pod port 2 wire C Positive and negative analog inputs 8 pin DIN 16 bits Chart software 12 bits Scope software 16 bits EChem software 16 24 bits PowerChrom software 2 LSB from O C to 70 C 100 kHz on one channel 40 kHz on two channels lt 1 Hz 100 kHz with Chart 2 Hz 100 kHz with Scope 100 Hz 10 kHz with EChem Single ended or bipolar 100 mA continuous 30 e corder Output impedance Slew rate Settling time Linearity error Output ranges External Trigger Trigger threshold Hysteresis Inp2. The e corder 201 or 401 hardware unit is a two or four channel data acquisition system that accepts analog voltage signals up to 10 V It can be directly connected to most laboratory equipment that would otherwise use a chart recorder XY plotter or oscilloscope to record data e corder Because the e corder unit sits outside the computer connected via a USB interface it is subject to less electrical interference than an internal data acquisition card lt is also easily transferred from one computer to another Apart from amplifying and filtering the signal the e corder has considerable processing power and performs many tasks that are necessary during data recording Data is transferred to the computer in packets though in most cases the software displays data in a smooth scrolling mode Once on the computer the data are available for review analysis storage printing or transfer to other graphing or analysis software The Software Chart and Scope software are provided on the Installer CD that is included with each e corder Chart emulates a multi channel chart recorder up to 16 channels can be displayed Scope emulates a two channel storage oscilloscope or XYT plotter Both provide many other features in addition to simple data acquisition including computed functions triggering options software controlled waveform generation and automated recording and analysis The Chart and Scope Software Manuals on the Inst
3. half bridge transducer A bridge transducer only using half of the full bridge circuit It consists of two elements of equal value with an excitation voltage applied across them The output of the transducer is taken at the junction of the two elements Hertz Hz See frequency high pass filter HPF See filter 12C The 12C connection is used by the e corder to control eDAQ Amps IEC International Electrotechnical Commission low pass filter LPF See filter PCI peripheral component interconnect An architecture for connecting peripheral devices such as USB cards to computers Pod connector A special 8 pin DIN connector on some e corder inputs providing differential or single sided connection and they can also provide 5 V power Pods Miniature preamplifiers that connect to the e corder Pod connectors port A socket where you plug in a cable for connection to a network or a peripheral device range The full scale input range is region over which signals can be recorded The e corder has ranges of 2 mV to 10 V in 12 steps Range is inversely proportional to gain the extent of amplification Scope Scope software is supplied with the e corder lt emulates a two channel storage oscilloscope or XYT plotter serial A connection protocol for sending information sequentially one bit at a time over a single wire transducer A physical device that converts one energy form into ano
4. 20 e corder e corder Accuracy and negative output through buffer amplifiers The outputs are capable of driving up to 12 mA into a load Each e corder is factory calibrated to an accuracy of better than 0 1 Some zero drift or gain drift can occur with time The unit can be Figure A 2 Block diagram of the e corder 401 Back C Port USBPort Serial Port TEC Mains Input a pane r O 30MHz y XTAL y 1 Y Switching 3 Power amp S Supply 5 a System E PPC403 CPU Glue Chip 2 z lt z T 3 2 m 5 Aa 5 E 16 bit ADC i 4 16 bit DAC MULTIPLEXER RANGE E a CONTROL E a o 2 Differential Input 2 Single ended Input 1 Amplifiers Amplifiers Front panel Input 3 Input 4 Analog Inputs Analog Ou put 5V External Trigger Input Appendix A Technical Aspects 21 factory recalibrated if required but for most applications this is unnecessary because of e DC drift compensation Each time that recording is started manually or by triggering or when the gain is changed the input to the amplifier is grounded and any DC due to the amplifier s drift with temperature and age is measured The measur
5. envelope The overall shape of a signal outlined by the minimum and maximum recorded values Often used to display quickly changing signals excitation The voltage supplied to a transducer or other device in order to power it external trigger The input connector on the front of the e corder marked Trigger This lets one start recording from an external source The trigger level the voltage needed to have an effect depends on the hardware and cannot be changed The 20 series e corders can also be triggered by contact closure if this is set up in the software filter A mechanism whereby the frequency components of the signal are altered Low pass filters remove high frequency noise components High pass filters remove low frequency drift components frequency The number of cycles per to occur in a waveform per unit Frequency is usually expressed in the SI unit of Hertz Hz cycles per second s but is also sometimes expressed in beats per minute bpm min revolutions per minute rpm min cycles per hour cph h7 etc frequency response The bandwidth in which a circuit passes a signal without significant attenuation A low pass filter s frequency response is the frequency where the signal is attenuated by 3 decibels that is the frequency in filtered signal has an amplitude of 0 707 1 12 of the frequency in the input signal gain The amount of amplification of a signal 34 e corder
6. This should clear a temporary problem If not then please contact your eDAQ representative The computer refuses to boot with the e corder connected or the computer can t find the e corder e The e corder may be off or the power is switched off at the wall the power cable is not connected firmly or a fuse has blown check all switches power connections and fuses e Ensure that the USB cable is firmly attached at both ends and try again If there is still a problem try a new cable if possible e Turn the e corder and computer off and then after at least five seconds turn the them back on again and try using the software again e corder 23 e Your might not properly support USB make sure that it meets the requirements listed in Chapter 1 page 3 The computer hangs up while recording or there is data loss e There may be a poor connection between e corder and computer or bad cable Ensure that the cable is firmly attached at both ends and try again If there is still a problem try a new cable The e corder doesn t work or the program crashes after a short time e A poor connection between e corder and computer or bad cable Proceed as above Signals seem weak or interacting on Input 1 or 2 e You may be using both the BNC connector and the Pod connector for an input at the same time with resultant signal competition Make certain that you use only one of the alternative connectors BNC or Pod for an inpu
7. using the GP Amp or pH Amp which provide input impedances of 108 and 101 Q respectively or other suitable high input impedance preamplifier The e corder grounds the amplifiers of those input channels not in use It also grounds each amplifier and measures the DC offset voltage when the gain is changed In this way the software corrects for any DC drift or offset in the circuits that may develop over time or between readings The operation of the input amplifiers is illustrated by the block diagrams shown in Figure 2 2 BNC Input Connectors Each analog input channel is fitted with a BNC connector on the front panel of the e corder unit Input 1 Input 2 etc These connectors are used for single ended signals difference between signal and ground The outer shell of each of the BNC connectors is equivalent to the Input Reference pin of the Pod DIN connector Figure 2 3 and provides a pathway to ground via the equivalent circuit shown in Figure 2 2 Pod Input Connectors Input channels 1 and 2 also have alternative Pod 8 pin DIN connectors Pod connectors allow the connection of eDAQ Pods our range of miniature preamplifiers The Pod DIN connectors can also be used to connect transducers requiring power 5 V DC at 50 mA continuous and or differential input separate and signal components as well as ground Pod inputs also provide several grounding options which can be useful in electrically noisy environments Do not at
8. aller CD provide more details Computer Requirements Windows e A computer with a Pentium processor or better e 32 MB free RAM 48 MB for Windows 2000 e Windows XP 2000 or later operating system e USB installed Macintosh e A G3 G4 or later Macintosh computer e 32 MB free RAM 64 MB recommended e Mac OS X or later Chapter 1 Overview e USB installed Other Hardware eDAQ has a range of optional preamplifiers that can be connected to the e corder eDAQ Amps are automatically recognized and configured by the software The range of eDAQ Amps includes the e pH mV Amp suitable for connection of pH ion selective and potentiometric ORP electrodes e Potentiostat a three electrode potentiostat that can be used for voltammetric and amperometric experiments Gain ranges of 20 nA to 100 mA in 1 2 5 steps e Picostat a high sensitivity three electrode potentiostat suitable for use with carbon fibre and other microelectrodes Current gain ranges of 10 pA to 100 nA in 1 2 5 steps e Bridge Amp suitable for sensors requiring a low drift high gain differential amplifier Also provides DC excitation e GP Amp suitable for high output sensors requiring a high impedance single ended or differential amplifier Also provides DC excitation eDAQ Pods our range of miniature preamplifiers e pH Pod suitable for use with most combination pH electrodes and combination potentiometric redox ORP electrodes e Con
9. are familiar with some of the features of your e corder you should check that it is working properly before you connect it to your computer The e corder performs a diagnostic self test each time it is switched on whether or not it is connected to a computer To test that your e corder is functioning properly when you turn it on follow the instructions below 1 Connect the e corder to a power outlet using the power cable that came with your unit Turn the power on at the wall 2 Turn on the power switch located on the rear of the unit 3 All three labelled indicators on the front panel should turn on at least briefly while the e corder is started up The Power indicator Figure 2 1 on the front panel should glow blue while the e corder is on If the internal diagnostic check finds no problems the Status indicator should flash yellow and then stay green The Trigger indicator should flash yellow and then turn off IF the indicators perform as described above then your e corder can be safely connected to your computer If the Power indicator does not glow blue when the power switch is turned on then there is a problem with the power source power cable or e corder itself check all connections 16 e corder If an error is detected during the self test the Status indicator will flash red which means there is a hardware fault Turn everything off and then after at le
10. ast five seconds turn the e corder back on again This should clear a temporary problem If the Status indicator continues to flash red then the e corder may need repair and you should contact your eDAQ representative If a problem persists contact your authorized eDAQ representative Do not attempt to repair the e corder yourself this will void your rights under warranty USB Connection The e corder is fitted with a USB universal serial bus port with which it is connected to a USB 1 1 or 2 compliant computers All the devices on a USB network have a common communication pathway if you have many devices with a lot of information to transfer they compete for capacity bandwidth Using a video camera and a scanner at the same time as an e corder may limit the sampling rates considerably in Chart or increase delay times between sweeps in Scope To ensure maximum reliability we recommend avoiding using such devices while the e corder is acquiring data The USB standard allows for two types of cable low speed cables suitable for mice and keyboards e high speed detachable USB cables These are fully shielded twisted pair cables with standard USB connectors a narrow rectangular A plug at one end and a nearly square B plug with a bevelled top at the other The e corder is provided with a suitable high speed cable Connecting the e corder Use the USB cable supplied with your e corder to connect the USB port on it
11. dows 2000 may bring up an alert if you attempt to disconnect the e corder while the computer is on The alert lets you install a control in your taskbar to avoid potential future problems e corder APPENDIX A Technical Aspects This appendix gives an overview as to how the e corder works You do not need to know the material here to use your e corder but it may be of interest to the technically minded You should not use this information as a service manual user modification of the e corder voids your rights under warranty How Does it Work The e corder is essentially a smart peripheral device designed to perform the various functions needed for data acquisition signal conditioning and pre processing It contains its own microprocessor memory and specialized analog amplifiers for signal conditioning The block diagrams in Figure A 1 and Figure A 2 show the essential elements of each e corder All sampling output and communication functions are controlled by an internal PowerPC microprocessor running at 60 MHz This microprocessor has access to 4 MB of internal dynamic RAM for data storage and buffering The e corder uses USB 2 universal serial bus to communicate with the computer The e corder analog inputs are multiplexed to a 16 bit ADC analog to digital converter The ADC can sample at a maximum rate of 100 kHz The sampling process is handled independently of the processor core through a co
12. ductivity Pod for use with conductivity cells e RTD Pod signal conditioner for 100 O Pt RTD s e Thermocouple Pod for use with appropriate T or K type thermocouple probes e corder Other Software PowerChrom software chromatographic data collection and analysis and EChem software electroanalytical chemistry experiments are also available for use with your e corder system See our web site at www eDAQ com for more information Chapter 1 Overview e corder CHAPTER TWO Setting Up This chapter starts with the e corder internal self test then looks at how to connect up your e corder to a computer lt discusses the USB connection in some detail e corder Figure 2 1 The e corder front panels The e corder First familiarize yourself with some of the external features of your e corder before connecting it to a power source The rest of this chapter discusses the different features connectors and indicators of the e corder 201 and e corder 401 The Front Panel The front panel of your e corder shown in Figure 2 1 provides most of the connectors for interfacing with external signals and indicators for various functions This section describes each of the front panel features Input channels 1 and 2 BNC connectors e corder 201 CU Power DO Status OI Trigger Indicator External tri
13. e corder User Manual Distributed by Measurement Systems Ltd 16 Kingfisher Court Newbury Berkshire RG14 5SJ Tel 44 1635 576800 Fax 44 1635 31023 Web www measurementsystems co uk E mail sales msl datascan com e corder 8 gt Input 1 Input 2 e corder 201 4 EU Power U Status DS Trigger Input 1 Input 2 Input 3 e corder 401 U Power U Status Output EU Trigger e corder www eDAQ com This document was as far as possible accurate at the time of printing Changes may have been made to the software and hardware it describes since then eDAQ Pty Ltd reserves the right to alter specifications as required Late breaking information may be supplied separately Latest information and information and software updates can be obtained from our web site Trademarks of eDAQ e corder and PowerChrom are registered trademarks of eDAQ Pty Ltd Specific model names of data recording units such as e corder 201 and PowerChrom 280 are trademarks of eDAQ Pty Ltd Chart and Scope are trademarks of ADInstrumets Pty Ltd and are used under license by eDAQ EChem is a trademarks of eDAQ Pty Ltd Other Trademarks Mac OS and Macintosh are registered trademarks of Apple Computer Inc Windows 98 Windows Me Windows 2000 and Windows XP are trademarks of Microsoft Corporation PostScript and Acrobat are registered trademarks of Adobe Syst
14. e yellow one e corder is turned off Red flashes The e corder has detected an internal fault during the power up test It will repeat until the power to the e corder is turned off Analog Inputs Each e corder analog input has an independently programmable gain amplifier with its own filtering and AC DC coupling You can set up each input with separate amplification and filtering settings to suit your requirements see the Chart and Scope Software Manuals on the Installer CD Each e corder input has gains of up to x5000 making it possible to record many signal ranges up to 10 V without the need for an intervening preamplifier The input amplifiers can be operated with or without AC coupling The AC coupling mode is equivalent to applying a 0 1 Hz high pass filter to remove the DC baseline signal Chapter 2 Setting Up A CAUTION e corder inputs and outputs are not electrically isolated If an isolated input is required a suitable isolated preamplifier must be used component Low pass digital filtering can be selected in software from 1 Hz to 2 kHz Note that each input is fitted with a fixed 20 kHz anti aliasing low pass filter which is the effective upper limit of the bandwidth This filter is active even when the software selectable digital filters are turned off The impedance of the e corder inputs is one megohm 1 MQ If you are using high impedance transducers gt 10 kQ you should consider
15. ecording with an external device The trigger input can be software configured to respond to a standard TTL or contact closure signal The trigger signal must be present for at least 5 ps to register as an event When a trigger event occurs the trigger indicator light will glow yellow The TTL threshold level above which a trigger event is registered is 2 9 V 0 25 V however once on the trigger turns off at 1 8 V 0 25 V giving a hysteresis voltage of 1 1 V The external trigger input draws 1 mA at the threshold 2 2 mA at 5 V and 5 5 mA at 10 V The input will be overloaded if the voltage exceeds 12 V When TTL configured a voltage must be applied across the outer ring and the inner pin of the Trigger BNC connector In this mode the trigger input is optically isolated as shown in Figure 2 5 Note that there is no Centre pin of BNC Optocoupler m 1500 Q Va Outer ring of BNC a Wa Opiocoupler Chapter 2 Setting Up Figure 2 6 The e corder back panel Power socket Model and serial numbers Earth Power on off No user serviceable parts inside Refer servicing to qualified service personnel Rated Voltage 90 250 V ACX 50 60 Hz 25 VA I2C Port USB Serial Port Power DB 9 connector connector mini DIN c
16. ed voltage is removed from the readings for that input through software correction in a process transparent to the user e Units Conversion If you are calibrating the transducer by using known physical quantities with the Units Conversion feature for example you can calibrate a force transducer by using two known masses then the raw voltage signal will be converted so that the transducer readings are displayed in the appropriate units Any offset on the raw signal will be effectively removed by this process More extensive calibration can be performed in the Chart software by use of the Multipoint Calibration feature which can also correct for a non linear signal 22 e corder APPENDIX B Troubleshooting This appendix describes most of the common problems that can occur with your e corder unit If the solutions here do not work then please your eDAQ representative or email us on support edaq com Checking for missing loose or inappropriate connections solves many problems For example a transducer may be incorrectly connected to the e corder Output connector rather than an input connector Please make sure that all cables are correctly and firmly connected to their relevant connectors The e corder Status indicator light flashes red or red and yellow when the e corder is turned on see Self Test page 16 e Turn the e corder off and then after at least five seconds turn the e corder back on again
17. ems Incorporated All other trademarks are the properties of their respective owners Products e corder 201 ED201 e corder 401 ED401 Document Number U ED201 ED401 1103 Copyright O November 2003 eDAQ Pty Ltd 6 Doig Avenue Denistone East NSW 2112 AUSTRALIA http www eDAQ com email info eDAQ com All rights reserved No part of this document may be reproduced by any means without the prior written permission of eDAQ Pty Ltd e corder 1 Overview 1 Unpacking 2 How to Use this Guide 2 The System 2 The Hardware 2 The Software 3 Computer Requirements 3 Other Hardware 4 Other Software 5 2 Setting Up 7 The ecorder 8 The Front Panel 8 Indicator Lights 9 Analog Inputs 9 BNC Input Connectors 10 Pod Input Connectors 10 Analog Output 12 Trigger 13 The Back Panel 14 PC Output 14 USB Port 15 Auxiliary Ground 15 Serial Port 15 Power 15 Self Test 16 USB Connection 17 Connecting the e corder 17 Contents A Technical Aspects 19 How Does it Work 19 e corder Accuracy 21 B Troubleshooting 23 C Specifications 29 e corder Specifications 29 Input 29 Sampling 30 Output Amplifier 30 External Trigger 31 Microprocessor and Data Communication 31 Expansion Ports 31 Physical Configuration 32 Glossary 33 Index 1 License 8 Warranty 3 e corder iii e corder C HAPTER ONE Overview Your e corder recording unit together with the Cha
18. f their actions If problems arise with an eDAQ product eDAQ will make all reasonable efforts to fix them This service may incur a charge depending on the nature of the problems and is subject to the other conditions in this Agreement Hardware Warranty eDAQ Pty Ltd warrants the e corder to be free of defects in material and workmanship for one year from the date of purchase eDAQ Pty Ltd will repair or replace defective equipment as appropriate To obtain a warranty repair replacement you must first notify us before return of the instrument and we will issue you with a RAN return authorization number You must ship the defective product at your License amp Warranty expense We will pay return shipping The product should be packed safely preferably in its original packaging and have the RAN on the shipping label Returns sent without a RAN may be refused delivery This warranty does not cover hardware that has e been modified by the user in any way e been subjected to unusual physical electrical or environmental stress This includes damage due to faulty power sockets inadequate earthing or power spikes or surges e been damaged because of incorrect wiring to ancillary equipment or because of substandard connectors or cables or e had the original identification marks removed or altered Software License You have the non exclusive right to use the supplied eDAQ software Chart Scope etc Your empl
19. gger input Analog output nput channels 1 and 2 lights BNC connector BNC connectors Pod port DIN connectors Input 1 Input 3 e corder o ps E Power OU Status Input 4 EU Trigger Input channels 3 and 4 BNC connectors e corder Table 2 1 Status indicator functions A WARNING Applying more than 15 V to the analog inputs can damage the eDAQ unit Indicator Lights There are three lights that indicate when power is on recording status and trigger state All three should turn on at least briefly when the e corder is first turned on The Power indicator should glow blue and then stay lit the Status indicator should flash yellow and then stay green and the Trigger indicator should flash yellow and then turn off When an external trigger signal is received the Trigger indicator will glow yellow The Status indicator provides some visual indication of what the e corder is doing and will flash different patterns and colors depending on the state of the e corder Table 2 1 These lights are used in the e corder self test on power up page 16 Status Indicator Meaning Off Idle and not yet initialized by the software Green Idle initialized and waiting for a command from the computer Yellow Sampling or communicating with the computer Four red The e corder has detected a low level software or flashes and firmware fault It will repeat until the power to the on
20. ntrol engine using direct memory access The CPU assembles groups of samples into blocks and then transmits them to the computer where the software receives records and displays the data e corder The external trigger input marked Trigger on the front panel allows either a voltage level or a contact closure to trigger recording A single 16 bit DAC digital to analog converter is used to provide an analog output or stimulation capability through the analog outputs of the e corder marked Output on the front panel Output pulse frequency is independent of the analog input sampling rate The output of the DAC is fed through a programmable attenuation network to produce different output ranges The signal is then split into a positive Figure A 1 Block diagram of the e corder 201 Back C Port JSBPort Serial Port IEC Mains ac Input panel O E al 30MHz y XTAL Y y y Switching E Power S Supply 5 x g System E PPC403 CPU Glue gt i in Chip 2 E 2 2 a S 7 D E 16 bit ADC a bit MULTIPLEXER RANGE s CONTROL 2 5 gt 8 a 2 2 Differential Input Front 3 A panel o S Input 1 Input 2 External Trigger Input Analog Inputs Analog Output
21. oltage or current amplitude The maximum vertical distance of a periodic wave from the zero or mean position about which the wave oscillates analog An analog signal varies continuously over time rather than changing in discrete steps analog input This refers to the connectors on the front of the e corder marked Input These inputs are designed to accept up to 10 V Inputs can be either single ended or differential analog output This refers to the connectors on the front of the e corder marked Output The analog output provides a software controlled variable output 10 V that can be used with Glossary applications either directly as a stimulator or to control peripheral devices analysis mode When the e corder is not connected to the computer then Chart or Scope software can be used to analyze and manipulate existing files if the analysis option is chosen BNC bayonet nut connector A sort of cable or connector a BNC to BNC cable connects two BNC connectors bridge transducer A type of transducer using a Wheatstone bridge circuit In its basic form the bridge consists of four two terminal elements usually strain gauges connected to form a quadrilateral An excitation source is connected across one diagonal and the transducer output is taken across the other bus A data carrying electrical pathway Chart The Chart software is supplied with the e corder and emulates a multi channel cha
22. onnector requirements electrical connection between the external trigger ground and the ground of the triggering device This removes ground noise and current loop problems and improves static discharge immunity In the external contact closure mode the trigger input will respond to a direct short between the centre pin and outer ring of the BNC connector This is typically achieved with an external relay contact a manual push button or a microswitch The trigger input is not electrically isolated when configured for contact closure The Back Panel The e corder back panel is shown in Figure 2 6 This section describes each of the back panel features The back panels are the same for the e corder 201 and e corder 401 1C Output The 12C output is a special port designed to connect to eDAQ Amps made by eDAQ It supplies power and communications An e corder can have as many eDAQ Amps connected as it has input channels two or four connected in a daisy chain arrangement Further details can be found in your specific eDAQ Amp Manual located on the Install CD Note You should not attempt to run other external devices from the 12C port it is designed for use only with eDAQ Amps 14 e corder Figure 2 7 12C connector pin assignments Power IC control signals Digital Ground Regulated 17 V Regulated 8 V Regulated 17 V SCL DSC SDA DSD NT so lo Io o ol 90 0 O 06 USB Po
23. oyees or students for example are entitled to use it provided they adhere to this agreement Each separate purchase of the eDAQ software licenses it to be used on two computers at any given time on one computer for data acquisition with a e corder hardware unit and on a second computer for the e corder analysis of existing data files Although multiple copies of a program may exist on several computers more than two copies must not be used simultaneously Departmental company licences are available if you wish to run more than two copies simultaneously Technical Support Please register your unit to receive technical support Technical assistance is available via email Please describe the problem with as much detail as possible Include a small example data file if appropriate Please also state e the model and serial number of your e corder unit e the type of computer and operating system being used for example Windows XP or Macintosh OS 10 2 e the software version you are using for example Chart v5 1 2 We endeavor to answer all your questions but in some cases for example where the problem relates to the other equipment that you are using a nominal fee may be charged Jurisdiction eDAQ Pty Ltd is bound by the laws of New South Wales in Australia and any proceedings shall be heard by the Supreme Court of New South Wales in Australia Disclaimer eDAQ reserves the right to alter specification
24. rol lines for eDAQ Pods you should never connect other devices to these Please take care when wiring transducers or other equipment to the Pod connectors Incorrect or faulty wiring can lead to damage of the Chapter 2 Setting Up 11 Signal input Figure 2 3 Pod input connector pin Excitation 5 V assignments Signal input Input reference ARN Analog ground Digital ground metal ring Input reference 100 Q Analog ground lt 10 V Figure 2 4 N e corder analog output circuit av lt 10V e corder the transducer or other equipment or both Such damage is not covered under the terms of your warranty Analog Output The e corder can produce an analog voltage signal via its Output sockets The output is bipolar that is mirror image waveforms are provided by the Output and Output connectors Figure 2 4 For example if a 2 5 V pulse is configured in the software then a 2 5 V pulse will appear at the Output connector and a 2 5 V pulse at the Output connector A maximum output of 10 V can be applied with a maximum current sink of 25 mA 12 e corder Figure 2 5 e corder trigger circuit Control of the output is via a 14 bit DAC digital to analog convertor inside the e corder that is configured by using the Stimulator commands in the Chart and Scope software Trigger The trigger connector external trigger enables an external signal to be used to synchronize r
25. rt The e corder connects to your computer using a USB universal serial bus port This works with USB 1 1 or USB 2 compliant computers Windows XP or 2000 or later or Macintosh with OS 8 5 or later You can safely turn on or off or disconnect or reconnect the e corder while the computer remains on The Chart or Scope software must not be running while this occurs Read the details on USB in Chapter 2 of this guide before connecting your e corder to your computer using USB Auxiliary Ground An auxiliary ground 4 mm terminal post has been provided on the back panel of the e corder lt can be used as a convenient location for grounding Faraday cages preamplifiers or otherwise unearthed ancillary equipment Serial Port The RS485 serial port connector Figure 2 8 is for factory diagnostic and testing procedures only It should NOT be used to connect to your computer Power The power switch on the back panel of the e corder turns the e corder on and off A 3 pin IEC power socket is used to connect your e corder Chapter 2 Setting Up Figure 2 8 Serial port pin assignments 7 5 V Ground Serial out RS485 low mE RS485 high se 5 V to a 3 pin earthed grounded power cable Unearthed 2 pin power sockets or adaptors do not provide safe operation The e corder universal power supply can use mains power supplies between 90 260 V AC 50 60 Hz Self Test Now that you
26. rt recorder e corder 33 connector A plug socket jack or port used to connect one electronic device to another via a cable CPU central processing unit A hardware device that performs logical and arithmetical operations on data as specified in the instructions the heart of most computers DAC digital to analog convertor A device that converts digital information into some corresponding analog voltage or current DC offset The amount of DC direct current voltage present at the output of an amplifier when zero voltage is applied to the input or the amount of DC voltage present in a transducer in its equilibrium state differential input Input using both positive and negative inputs on An e corder The recorded signal is the difference between the positive and negative input voltages if both were fed exactly the same signal zero would result Can reduce the noise from long leads digital Varying in discrete steps A digital signal increments in discrete steps rather than varying continuously The size of the steps is determined by the resolution 16 bit 12 bit etc and the full scale range of the input channel DIN Deutsche Industrie Norm An electronic standard eDAQ Amp Software controlled preamplifiers that can be used with your e corder eDAQ Amps are recognized automatically by the e corder system and seamlessly integrated into its applications operating under full software control
27. rt and Scope software provides a versatile data recording and analysis system when used with a Windows or Macintosh computer This chapter provides an overview of the e corder system and describes its basic features e corder A WARNING Applying more than 15 V to the analog inputs can damage the eDAQ unit e Unpacking As soon as you unpack your e corder unit please check that e all items described in the packing list are included and that e there are no signs of damage that may have occurred during transit Contact your eDAQ distributor if you encounter a problem How to Use this Guide This manual describes the features of the e corder system and its connection to your computer The appendixes provide technical information about the recording unit and solutions to problems Please note that only an authorized eDAQ distributor should attempt repairs If you modify the recording unit yourself you void any rights you have under warranty The Chart and Scope Software Manuals provide detailed information on how to use your e corder system to acquire display and analyze data The System The e corder system is an integrated system of hardware and software designed to record display and analyze experimental data The hardware comprises the e corder recording unit and possible ancillary devices eDAQ Amps or Pods the Chart and Scope software run on the computer to which the e corder is connected The Hardware
28. s back panel to the USB port on the computer or fo an active USB hub connected to the computer USB ports and cables should be marked with a tridentlike icon eZ or the letters USB Chapter 2 Setting Up Figure 2 9 Connection to a computer USB icon e corder B plug Computer A ST A plug USB cable Note that you can have more than one USB device connected to your computer at one time However you should observe the following rules when working with USB devices e Cable length should be less than 5 m 16 feet between USB devices including USB hubs You can have up to five intervening hubs so the maximum distance is 30 m 98 feet between the computer and the e corder e Never attempt to make your own USB cable or modify one USB is sensitive to cable impedances and cable lengths Only use a certified USB cable from a reliable supplier Your e corder is supplied with a suitable USB cable If you need additional USB cables you should buy high speed cables fully shielded twisted pair and with standard USB connections for reliable results e Don t disconnect the e corder while the Chart or Scope software is using it Stop sampling and quit the software before disconnecting an e corder You can safely turn on or off or disconnect or reconnect an e corder while the computer remains on as long as the Chart or Scope software is off Although USB is a hot pluggable standard Win
29. s of hardware and software without notice No liability can be accepted for consequential damages resulting from use of eDAQ products e corder
30. t when recording When Windows starts up it doesn t recognize the e corder e This should happen only the first time e corder hardware is connected to the computer Windows may bring up the New Hardware wizard and ask if you want to install a driver Insert the Software Installer CD leave the wizard on its default settings and continue There is an alert when the e corder is disconnected or turned off e USB is a hot pluggable standard meaning that you should be able to turn on or off or disconnect or reconnect a USB connected e corder safely while the computer remains on as long as the Chart or Scope is off when you do it However Windows 2000 may still bring up an alert which asks you install a control in your taskbar Install the control and use it before you disconnect or turn off the e corder to avoid the alert in the future e corder Appendix B Troubleshooting 25 26 e corder Appendix B Troubleshooting 27 28 e corder A P P E NDA AS Specifications e corder Specifications Input Number of inputs Input configuration Amplification ranges Maximum input voltage Input impedance Low pass filtering AC coupling Frequency response 3 dB 2 eDAQ 201 4 eDAQ 401 Single ended via BNC connector or differential via DIN connector 20 mV to 10 V full scale in 9 steps 10 V EHHH WH WH H N UU N QU
31. tempt to record from both the BNC and Pod connectors of the same input channel at the same time the signals will compete and the results will be unpredictable e corder Figure 2 2 Block diagram of the e corder input circuits Channel control bus AC DC Grounding Gain coupling and input control control selection 5 Q oO E 5 To multiplexer Q Fa a Input reference Analog input v E Channel control bus AC DC Grounding coupling and input Gain gt control selection control Q Z Hl a En MO o E Inst t e ice To multiplexer B A amplifier a For a transducer or other device requiring single ended connection without shield use the Signal input and Input reference pin positions This is equivalent to using the input channel BNC connector In rare cases the Analog Ground position may provide less noise than the Input reference position If the connection cable also uses a shield then this can be connected to the Digital Ground position Signals from transducers requiring differential input may be monitored by connecting them to the Signal input and Signal input pin positions If a shield is also required then connect it to the Digital Ground position The SCL and SDA pin positions are special cont
32. ther usually an electrical signal For example transducers can provide an electrical signal related to the amount of measured force displacement temperature pressure pH etc Ideally the signal varies in a proportional manner to the measured parameter but this is not always so trigger signal such as a voltage pulse used to determine when sampling will begin Sampling can be made to begin when the trigger level is reached after it or even prior to it See also external trigger TTL transistor transistor logic A family of integrated circuits with bipolar circuit logic used in computers and related devices TTL is also a standard for interconnecting such ICs defining the voltages used to represent logical zeroes and ones binary O and 1 USB Universal serial bus waveform The shape of a wave a graph of a wave s amplitude versus time Glossary 35 36 e corder Index A AC coupling 33 accuracy 21 ADC 19 33 analog input 10 19 analog output 12 20 anti aliasing filter 10 auxiliary ground 15 B back panel 14 bandwidth 10 BNC 33 bridge 33 Bridge Amp 4 bus 33 C Chart 3 computer requirements Macintosh 3 Windows 3 Conductivity Pod 4 connection to the computer 17 connector 34 CPU 34 D DAC 34 DAC digital to analog converter 20 DC drift 10 differential input 34 digital to analog converter 20 DIN 34 DIN connector 10 E e corder specifica
33. tions 29 system 2 eDAQ Amps Bridge Amp 4 GP Amp 4 pH Amp 4 Picostat 4 Potentiostat 4 eDAQ Pods Conductivity Pod 4 pH Pod 4 RTD Pod 4 Thermocouple Pod 4 eDAQ web site 5 envelope 34 excitation 34 external trigger 13 14 20 e corder F filter 34 front panel 8 G gain 34 GP Amp 4 ground connection 15 H half bridge 35 I2C port 14 input amplifier 9 N New Hardware wizard 24 O offset 34 P PCI 35 pH Amp 4 pH Pod 4 Picostat 4 Pod connector 10 35 Pods 4 Potentiostat 4 Power indicator 9 16 power requirements 15 problems and solutions 23 R RS485 serial port 15 RTD Pod 4 S Scope 3 self test 16 serial port 15 signal accuracy 21 specifications 29 Status indicator 9 17 T Thermocouple Pod 4 transducer 35 trigger 13 34 35 Trigger indicator 9 TIL 35 U USB 35 cables 18 connection 17 hubs 18 port 15 user modification 19 e corder oo Trademarks e corder and PowerChrom are registered trademarks of eDAQ Pty Ltd All eDAQ software hardware and documentation is protected by copyright eDAQ retains the exclusive ownership of the trademarks and registered trademarks represented by its company name logo and product names Responsibilities You and any others using any eDAQ product agree to use it in a sensible manner for purposes for which it is suited and agree to take responsibility for their actions and the results o
34. ut load Maximum input voltage Minimum trigger time Processor Memory Data communication Expansion Ports 12C expansion port 0 1 Q typical 6 V ps 2 ps to 0 01 of FSR for LSB change 1 LSB from O C to 70 C 200 mV to 10 V full scale in six steps t Ht H WH HW H N UU N QU 2 9 V 0 25 V or contact closure software selectable 1 1 V turns off at 1 8 V 0 25 V 2 2 mA at 5 V 5 5 mA at 10 V 12 V 5 ps Microprocessor and Data Communication PPC403 GCX 60 MHz internal A MB DRAM USB Power and control bus for eDAQ Amps Appendix C Specifications 31 Physical Configuration Dimensions w x h x d 200 mm x 65 mm x 250 mm 7 9 x 2 6 x 9 8 excludes connectors Weight 2 0 kg 4 lb 6 oz Operating voltage 90 260 V AC 50 60 Hz Nominal power needs 6 VA 25 mA 240 V or 52 mA O 115 V no eDAQ Amps or pods attached Maximum power needs lt 18 VA with eDAQ Amps and Pods Operating temperature range Oto 35 C O to 90 humidity non condensing eDAQ reserves the right to alter these specifications at any time 32 e corder This glossary covers terms used in this manual AC coupling When AC coupling is chosen a 0 1 Hz high pass filter before the first amplification stage which can be used to remove signal drift ADC analog to digital convertor A device that converts analog information into some corresponding digital v
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