PMD-1208LS User's Guide - LArTPC Document Database
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1. A D channel of the scan amp l number f Sample rate in Samples per second FileNames 4 gt ired here ge F S UI un CBRates 5 blShowLoChax SnovHiChan 151ShowOptior IbiShowGain Capntion Forma lolShowFile Caption FileNamei lelshowCount Ca ption Formats cBCounts 6 lblSnowPreTrig Caprion Not Applicabie Dumwmy DoEvents g nor Collect the values with cbFileAInScaBM D CBE Liles Inscans g ULStats Tastan BoardNim Lowchant tf MBStartt a S502 hen x Mathuk ar Eng pama of the file you creanreu chiStnpConverk Enabled cndStepconv rt Visible 0 cidStartAcq Enab led LAE chH5tartAcq Visible criletNewe Se SA MEASUREMENT COMPUTING PMD 1208LS Personal Measurement Device brand USB based Analog and Digital IJO Module User s Guide A IMEASUREMENT COMPUTING Document Revision 8 May 2005 Copyright 2005 Measurement Computing Corporation Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Refer to www mccdaq com execteam html for the names titles and contact information of each key executive at Measurement Computing Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech2. 4 1 PMD 1208LS User s Guide Specifications Table 4 1 Accuracy Differential Mode Range Accuracy LSB 20V 5 1 10V 6 1 5V 8 1 4V 9 1 2 5V 12 1 2V 14 1 1 25V 20 1 1 V 24 1 Table 4 2 Accuracy Single Ended Mode Range Accuracy LSB 10V 4 0 Table 4 3 Accuracy Components Differential Mode All values are Range of Reading Gain Error at FS mV Offset mV Accuracy at FS mV 20V 0 2 40 9 766 49 766 10V 0 2 20 9 766 29 766 5V 0 2 10 9 766 19 766 4V 0 2 8 9 766 17 766 2 5V 0 2 5 9 766 14 766 2V 0 2 4 9 766 13 766 1 25V 0 2 2 5 9 766 12 266 1V 0 2 2 9 766 11 766 Table 4 4 Accuracy Components Single Ended Mode All values are Range of Reading Gain Error at FS mV Offset mV Accuracy at FS mV 10V 0 2 20 19 531 39 531 Analog output section Parameter Conditions Specification D A converter type PWM Resolution 10 bits 1 in 1024 Maximum output range 0 5 Volts Number of channels 2 voltage output Throughput Software paced 100 S s single channel mode 50 S s dual channel mode Power on and reset voltage Initializes to 000h code Maximum voltage Note 3 No Load Vs 1mA Load 0 99 Vs 5mA Load 0 98 Vs Output drive Each D A OUT 30mA Slew rate 0 14V mS typ Note 3 Vs is the USB bus 5V power The maximum analog output voltage is equal to V
3. 15 V 5 V Invalid 10 V 0V 10 V 10 V 10 V 20 V OV 10 V 10 V 0V 420 V 20 V 10 V 10 V 20 V 10 V 0V 10 V 15 V 5 V 20 V 20 V 0 20 V For more information on analog signal connections For more information on single ended and differential inputs refer to the Guide to Signal Connections this document is available on our web site at www mccdaq com signals signals pdf Digital IJO terminals Port A0 to A7 and Port BO to B7 You can connect up to 16 digital I O lines to the screw terminal containing pins 21 to 40 Port A0 to Port A7 and Port B0 to Port B7 Refer to the pinout diagrams on page 3 4 for the location of these pins You can configure each digital port for either input or output When you configure the digital bits for input you can use the digital I O terminals to detect the state of any TTL level input Refer to the switch shown in Figure 3 8 and the schematic shown in Figure 3 9 If the switch is set to the 5 V input Port AO reads TRUE 1 If you move the switch to GND Port AO reads FALSE 3 7 PMD 1208LS User s Guide Functional Details PORT A0 x b fe Figure 3 8 Digital connection Port AO detecting the state of a switch LU GND 5V Figure 3 9 Schematic showing switch detection by digital channel Port AO For more information on digital signal connections For more information on digital signal connections and digital I O techniques refer to the Guide to
4. iii Table of Contents Preface About this User s Guide ice sasasi taa a aana tice Ta a enc tice awa ada naga de re di eaaa dee satan cee deere sh aa a anaes eae vi What you will learn from this user s guide eeceeceeecceseceseceeesecesecesecseecseecaeeeseeeeeseenseensecaeceaecnaecaecaecaeeenes vi Conventions in this user s guide ssesssssssssssesseseee eene nnen teen ne nennen rr eaaa aane nennen nennen vi Where to find more information sess eene enne en trennen er rennen nn nennen vi Chapter 1 Introducing the PMD 1208LS eseeccsesseeceseseeeeeeeeeeeseeeeeeeseeeeeeeseeseeneeseseseeeseseseaesesesneeseseeneeseseenaeens 1 1 PMD 1208LS block dia gram saos 5 raa e ag aa a na naa a aga d a da EN GA A ma A E a EA E a gak maa aa na ani 1 2 Software features s oe a al NG EE AA a ee a A EA a Ga a Aa aaa Gaga a a tetto fs 1 2 Connecting a PMD 1208LS to your computer Is easy cccescceseeeseescecseeeseeseecaeeeseeeeeeseeeeeneenseenseenseenaeenaes 1 3 Chapter 2 Installing the PMD 1208LS 2 re ecce en eire rn eer ree rn e nee Eier Ewa Cei ER nu se aaa aana sein 2 1 What comes with your PMD 1208LS shipment asaseana nenen anane aane n aaa n anan anana anana aana een enne 2 1 HatdWate sasana a TE cs ere itn artt bes Senet age rat tec A miei deret we a na oe aa a aa ed Software Documentation Unpacking the PMD 1208LS6 ete ee RU T e E PE ER
5. 16 digital I O lines in two 8 bit ports You can configure each digital port independently for either input or output The PMD 1208LS is shown in Figure 1 1 I O connections are made to the screw terminals located along each side of the PMD 1208LS Figure 1 1 PMD 1208LS 1 1 PMD 1208LS User s Guide Introducing the PMD 1208LS PMD 1208LS block diagram PMD 1208LS functions are illustrated in the block diagram shown here USB1 1 Analog Input Compliant 8 SE 11 bit channels Interface or 4 Diff 12 bit channels USB Analog Output Microcontroller 10 bit 2 channels Screw terminal I O connector 82C55 DIO 32 bit Event Counter 1 channel Screw terminal I O connector Figure 1 2 PMD 1208LS Functional block diagram Software features The following software ships with the PMD 1208LS free of charge InstaCal installation calibration and test utility TracerDAQ suite of virtual instruments SoftWIREQ for Visual Studio NET graphical programming MCC DAQ Components for VS NET installed with SoftWIRE for VS NET For information on the features of InstaCal TracerDAQ and SoftWIRE refer to the DAO Software Quick Start booklet that shipped with the PMD 1208LS 1 2 PMD 1208LS User s Guide Introducing the PMD 1208LS Connecting a PMD 1208LS to your computer is easy Installing a data acquisition device has never been easier The PMD 1208LS relies upon the Microsoft Human Interf
6. 2 2 Installing the software eicere ene tbe rete eee eie ee ie cre e ees 2 2 Installing the hardware se eee e e RV RE ede d Fe eR 2 2 Chapter 3 Functional Details tete oe ctc co rient ioter ve paaie ccce ga se NAN reri enc ta ena NENG 3 1 Theory of operation analog input acquisition modes sssssssseseeeeeeeeeen eene 3 1 Software paced mode 3 eR edere ete Iain dee ete ede horae AAN dona tune dn eed ioo ade E eie n e do eh en eaa dein ene ena Ai Continuous scan mode B rst8can mode one defi ade ue ete th adhe ape Polen tee hes eite ds eb eee de dba er dee ababe PU td EOD External components 23e oae eat e e tee ie E ee dat ebd pedet tenete USB COMME CUON e E LED xit Screw terminal wiring Main connector and pin OUt Am Analog input terminals CHO IN CH7 IN Digital I O terminals Port AO to A7 and Port BO to B7 Power terminals sa amis ia oen e a Kana aa anan Ground terminals Calibration terminal Trigger terminal Counter t rminal 6 ed eR nece erede Lh hi Aa dee BGG AE PEE eee ACCURACY Si RR PMD 1208LS channel gain queue feature ener enne enne nnns Chapter 4 Terrence P 4 1 Analog input section nee p ne ere e RR ER HE He Ele He EE Se erae iT 4 1 Analog Output SeCtIOTic 4 arcet eee ate anga t e E Pe SER oe et RE de eH el eect 4 2 Digital iiput OUtpUut os a ap
7. Signal Connections available on our web site at www mccdaq com signals signals pdf Power terminals The PC 5 V connection pin 30 is on the bottom screw terminal of the PMD 1208LS Refer to the pinout diagrams on page 3 4 for the location of this pin This terminal draws power from the USB connector The 5 V screw terminal is a 5 volt output that is supplied by the host computer Caution The 5V terminal is an output Do not connect to an external power supply or you may damage the PMD 1208LS and possibly the computer The maximum total output current that can be drawn from all PMD 1208LS connections power analog and digital outputs is 500 mA This maximum applies to most personal computers and self powered USB hubs Bus powered hubs and notebook computers may limit the maximum available output current to 100 mA Just connecting the PMD 1208LS to your computer draws 20 mA of current from the USB 5 V supply Once you start running applications with the PMD 1208LS each DIO bit can draw up to 2 5 mA and each analog output can draw 30 mA The maximum amount of 5 V current available for experimental use over and above that required by the PMD 1208LS is the difference between the total current requirement of the PMD based on the application and the allowed current draw of the PC platform 500 mA for desktop PCs and self powered hubs or 100 mA for bus powered hubs and notebook computers With all outputs at their maximum out
8. ag Na an Ng aa NE A Pa a a RS RR OT tap des 4 3 Extertial tfigoer aas anaa e aote aa OPER eee t e epi n anrea 4 3 Counter Section to sedeo aot Sed ntes iiis GN aaa ELEM cn dr peii tot bea ee nudes 4 3 Non volatile memory ene iae RR Ree ee er wee n Ree S 4 3 lj C M oe 4 4 Jti 4 4 PMD 1208LS User s Guide Environmental e e BARRA Se BR ond E dtu NI Dd wR ee 4 4 MechaniGal ks sasae eet aie a ai aa a NG ga e wise te ith a E aaa aatia ad aa ne ah a A aa tee hese dy 4 4 Main connector and PiN ONE so ck tee a OU RR ue A EC e EE e ne es 4 4 4 channel differential mode she 8 channel single ended mode sess eene ne entrent ennt Sensen sestren nennen tnn 4 5 Preface About this User s Guide What you will learn from this user s guide This user s guide explains how to install configure and use the PMD 1208LS so that you get the most out of its USB data acquisition features This user s guide also refers you to related documents available on our web site and to technical support resources that can also help you get the most out of the PMD 1208LS Conventions in this user s guide For more information on Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading Caution Shaded caution statements present information to help you avoid injuring y
9. max 40 to 85 C 100 ppm max Device type USB 1 1 low speed Device compatibility USB 1 1 USB 2 0 Environmental Operating Temperature Range 40 to 85 C Storage Temperature Range 40 to 85 C Humidity 0 to 90 non condensing Mechanical Dimensions 79mm L x 82mm W x 25mm H USB Cable Length 3 Meters max User Connection Length 3 Meters max Main connector and pin out Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG 4 4 PMD 1208LS User s Guide Specifications 4 channel differential mode Pin Signal Name Pin Signal Name 1 CHO IN HI 21 Port AO 2 CHO IN LO 22 Port A1 3 GND 23 Port A2 4 CH1 IN HI 24 Port A3 5 CH1 INLO 25 Port A4 6 GND 26 Port A5 7 CH2 IN HI 27 Port A6 8 CH2 INLO 28 Port A7 9 GND 29 GND 10 CH3 IN HI 30 PC 5V 11 CH3 IN LO 31 GND 12 GND 32 Port BO 13 D A OUT 0 33 Port B1 14 D A OUT 1 34 Port B2 15 GND 35 Port B3 16 CAL 36 Port B4 17 GND 37 Port B5 18 TRIG IN 38 Port B6 19 GND 39 Port B7 20 CTR 40 GND 8 channel single ended mode Pin Signal Name Pin Signal Name 1 CHO IN 21 Port AO 2 CH1 IN 22 Port A1 3 GND 23 Port A2 4 CH2 IN 24 Port A3 5 CH3 IN 25 Port A4 6 GND 26 Port A5 7 CHA IN 27 Port A6 8 CH5 IN 28 Port A7 9 GND 29 GND 10 CH6 IN 30 PC 5V 11 CH7 IN 31 GND 12 GND 32 Port BO 13 D A OUT 0 33 Port B1 1
10. satisfied or chose the wrong product by mistake you do not have to keep it Please call for an RMA number first No credits or returns accepted without a copy of the original invoice Some software products are subject to a repackaging fee These warranties are in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular application The remedies provided herein are the buyer s sole and exclusive remedies Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect special incidental or consequential damage arising from the use of its products even if Measurement Computing Corporation has been notified in advance of the possibility of such damages HM PMD 1208LS doc ii Trademark and Copyright Information Personal Measurement Device brand TracerDAQ Universal Library nstaCal Harsh Environment Warranty Measurement Computing Corporation and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation SoftWIRE is a registered trademark of SoftWIRE Technology Inc PC is a trademark of International Business Machines Corp Windows Microsoft and Visual Studio are either trademarks or registered trademarks of Microsoft Corporation LabVIEW is a trademark of National Instruments All other trademarks are the property of their respective owners LabVIEW is a trademark
11. support It s the embodiment of our two missions To offer the highest quality computer based data acquisition control and GPIB hardware and software available at the best possible price To offer our customers superior post sale support FREE Whether providing unrivaled telephone technical and sales support on our latest product offerings or continuing that same first rate support on older products and operating systems we re committed to you Lifetime warranty Every hardware product manufactured by Measurement Computing Corporation is warranted against defects in materials or workmanship for the life of the product Products found defective are repaired or replaced promptly Lifetime Harsh Environment Warranty We will replace any product manufactured by Measurement Computing Corporation that is damaged even due to misuse for only 5096 of the current list price I O boards face some tough operating conditions some more severe than the boards are designed to withstand When a board becomes damaged just return the unit with an order for its replacement at only 5096 of the current list price We don t need to profit from your misfortune By the way we honor this warranty for any manufacturer s board that we have a replacement for 30 Day Money Back Guarantee You may return any Measurement Computing Corporation product within 30 days of purchase for a full refund of the price paid for the product being returned If you are not
12. 4 D A OUT 1 34 Port B2 15 GND 35 Port B3 16 CAL 36 Port B4 17 GND 37 Port B5 18 TRIG IN 38 Port B6 19 GND 39 Port B7 20 CTR 40 GND 4 5 C Declaration of Conformity Manufacturer Measurement Computing Corporation Address 16 Commerce Boulevard Middleboro MA 02346 USA Category Electrical equipment for measurement control and laboratory use Measurement Computing Corporation declares under sole responsibility that the product PMD 1208LS to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents EU EMC Directive 89 336 EEC Electromagnetic Compatibility EN 61326 1997 Amendment 1 1998 Emissions Group 1 Class B EN 55011 1998 CISPR 11 Radiated and Conducted emissions Immunity EN61326 Annex A EN 61000 4 2 1995 Electrostatic Discharge immunity Criteria A EN 61000 4 3 1997 Radiated Electromagnetic Field immunity Criteria A EN 61000 4 8 1995 Power Frequency Magnetic Field immunity Criteria A Power line and I O tests to EN61000 4 4 EN61000 4 5 EN61000 4 6 and EN61000 4 11 were not required The device is DC powered from an I O cable which is less than three meters long Declaration of Conformity based on tests conducted by Chomerics Test Services Woburn MA 01801 USA in May 2004 Test records are outlined in Chomerics Test Report EMI3733 04 We hereby declare that the equipment specified co
13. A D converter type Successive Approximation type Input voltage range for linear operation Single CHx to GND 10V max Ended Mode Input common mode voltage range for linear CHx to GND 10V min 20V max operation Differential Mode Absolute maximum input voltage CHx to GND 40V max Input current Note 1 Vin 10V 70A typ Vin 0V 12nA typ Vin 10V 944A typ Number of channels 8 single ended 4 differential software selectable Input ranges Single Ended Mode 10V G 2 Input ranges Differential Mode 20V G 1 10V G 2 5V G 4 4V G 5 2 5V G 8 2 0V G 10 1 25V G 16 1 0V G 20 Software selectable Throughput Software paced 50 S s Continuous scan 1 2kS s Burst scan to 4K 8kS s Channel Gain Queue Up to 8 elements Software configurable channel range and gain Resolution Note 2 Differential 12 bits no missing codes Single ended 11 bits CAL Accuracy CAL 2 5V 0 05 typ 0 25 max Integral Linearity Error 1 LSB typ Differential Linearity Error 0 5 LSB typ Repeatability 1 LSB typ CAL current Source 5mA max Sink 20uA min 200nA typ Trigger Source Software selectable External Digital TRIG_IN Note 1 Input current is a function of applied voltage on the analog input channels For a given input voltage Vin the input leakage is approximately equal to 8 181 Vin 12 pA Note 2 The AD7870 converter only returns 11 bits 0 2047 codes in single ended mode
14. DF at www mccdaq com PDFmanuals DAQ Software Quick Start pdf Installing the hardware Be sure you are using the latest system software Before you connect the PMD 1208LS make sure that you are using the latest versions of the USB drivers Before installing the PMD 1208LS download and install the latest Microsoft Windows updates In particular when using Windows XP make sure you have XP Hotfix KB822603 installed This update is intended to address a serious error in Usbport sys when you operate a USB device You can run Windows Update or download the update from www microsoft com downloads details aspx familyid 733dd867 56a0 4956 b7fe e85b688b7f86 amp displaylang en For more information refer to the Microsoft Knowledge Base article Availability of the Windows XP SP1 USB 1 1 and 2 0 update This article is available at support microsoft com kbid 822603 To connect the PMD 1208LS to your system turn your computer on and connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer The USB cable provides power and communication to the PMD 1208LS 2 2 PMD 1208LS User s Guide Installing the PMD 1208LS When you connect the PMD 1208LS for the first time a Found New Hardware popup balloon Windows XP or dialog other Windows version opens as the PMD 1208LS is detected by your computer PMD 1208LS xo MAE i Found New Hardware Ano
15. Low pulse width 500ns min Input low voltage OV min 1 0V max Input high voltage 4 0V min 15 0V max Non volatile memory Memory size Memory configuration 8192 bytes Address Range Access Description 0x0000 Ox17FF Read Write A D Data 4K samples 0x1800 0x1 EFF Read Write User data area Ox1F00 Ox1 FEF Read Write Calibration Data Ox 1 FFO 0x1 FFF Read Write System Data 4 3 PMD 1208LS User s Guide Specifications Power Parameter Conditions Specification Supply Current Note 5 20mA 5V USB power available Note 6 Connected to Self Powered Hub 4 5V min 5 25V max Connected to Bus Powered Hub 4 1V min 5 25V max Output Current Note 7 Connected to Self Powered Hub 450mA min 500mA max Connected to Bus Powered Hub 50mA min 100mA max Note 5 This is the total current requirement for the PMD 1208LS which includes up to 5mA for the status LED Note 6 Self powered refers to USB hubs and hosts with a power supply Bus powered refers to USB hubs and hosts without their own power supply Note 7 This refers to the total amount of current that can be sourced from the USB 5V analog outputs and digital outputs General Parameter Conditions Specification USB Controller Clock Error 25 5G 30 ppm max 0 to 70 C 50 ppm
16. NO 619 G QN9 QNO 6 GS QN9 IH NI HO OL AS 9d NI 9HO OL GS AG Od OT1NI HO LE S aNd NI ZHO LL S aNd GND zi S 08 uod QNO zi 6 S 08 uod OLNOV G EL duod oinowd ei S Lg uod L inova I S zgod inova gil S GS zg uod GND si S g uog QNO si O S eg uod qo 91 9 vg Hod 1v9 91 S vg uod auo Z Q 4 sg uod QNO 411 Ze sd uod NI Olt 81 NY 9g uod NUOIML gL S 9g uod ANd ei S S 18 uod ano 611 S 18 Yod ulo oz aN9 uio oz aN9 o a o 9 E g 3 3 E Q S o 2 o o gt 80 9 9 t bal oa 3 4 PMD 1208LS User s Guide Functional Details Analog input terminals CHO IN CH7 IN You can connect up to eight analog input connections to the screw terminal containing pins to 20 CHO IN through CH7 IN Refer to the pinout diagrams on page 3 4 for the location of these pins You can configure the analog input channels as eight single ended channels or four differential channels When configured for differential mode each analog input has 12 bit resolution When configured for single ended mode each analog input has 11 bit resolution due to restrictions imposed by the A D converter Single ended configuration When all of the analog input channels are configured for single ended input mode eight analog channels are available The input signal is referenced to signal ground GND and delivered through two wires The wire carrying
17. V Although the common mode voltage signal on each input now has a range of 7 V to 15 V both inputs still satisfy the 10 V to 20 V input requirement see Figure 3 6 15V Measured Signal CHHI 11V n 8V Differential 8V wW x 7V 3 6 PMD 1208LS User s Guide Functional Details Figure 3 6 Differential Voltage Example Common Mode Voltage of 11V If you decrease the common mode voltage to 7 V the differential stays at 8 V However the solution now violates the input range condition of 10 V to 20 V The voltage on each analog input now swings from 3V to 11V Voltages between 10 V and 3 V are resolved but those below 10 V are clipped see Figure 3 7 3V z Measured Signal CHHI 7y B 3v bd 8V Differential FIIN 3V Y CHLO 7V AAA 11V Figure 3 7 Differential Voltage Example Common Mode Voltage of 7 V Since the analog inputs are restricted to a 10 V to 20 V signal swing with respect to ground all ranges except 20V can realize a linear output for any differential signal with zero common mode voltage and full scale signal inputs The 20 V range is the exception You cannot put 20 V on CHHI and 0 V on CHLO since this violates the input range criteria Table 3 2 shows some possible inputs and the expected results Table 3 2 Sample Inputs and Differential Results CHHI CHLO Result 20 V 0V Invalid
18. ace Device HID class drivers The HID class drivers ship with every copy of Windows that is designed to work with USB ports We use the Microsoft HID because it is a standard and its performance delivers full control and maximizes data transfer rates for your PMD 1208LS No third party device driver is required The PMD 1208LS is plug and play There are no jumpers to position DIP switches to set or interrupts to configure You can connect the PMD 1208LS before or after you install the software and without powering down your computer first When you connect an HID to your system your computer automatically detects it and configures the necessary software You can connect and power multiple HID peripherals to your system using a USB hub You can connect your system to various devices using a standard four wire cable The USB connector replaces the serial and parallel port connectors with one standardized plug and port combination You do not need a separate power supply module The USB automatically delivers the electrical power required by each peripheral connected to your system Data can flow two ways between a computer and peripheral over USB connections 1 3 Chapter 2 Installing the PMD 1208LS What comes with your PMD 1208LS shipment As you unpack your PMD 1208LS verify that the following components are included Hardware PMD 1208LS USB cable 2 meter length Software The Measurement Computing Data Acqu
19. cedaq com PDFmanuals SM UL Lab VIEW pdf MCC s Guide to Signal Connections is available on our web site at www mccdaq com signals signals pdf PMD 1208LS User s Guide this document is available on our web site at www mccedaq com PDFmanuals PMD 1208LS pdf vi Chapter 1 Introducing the PMD 1208LS This user s guide contains all of the information you need to connect the PMD 1208LS to your computer and to the signals you want to measure The PMD 1208LS is part of the Personal Measurement Device brand of USB based data acquisition products The PMD 1208LS is a USB 1 1 low speed device supported under Microsoft Windows 98 2 edition Windows ME Windows 2000 and Window XP It is designed for USB 1 1 ports and was tested for full compatibility with both USB 1 1 and USB 2 0 ports Refer to the Be sure you are using the latest system software note in Chapter 2 Installing the PMD 1208LS to make sure you are using the latest USB drivers The PMD 1208LS features eight analog inputs two 10 bit analog outputs 16 digital I O connections and one 32 bit external event counter The PMD 1208LS is powered by the 5 volt USB supply from your computer No external power is required The PMD 1208LS analog inputs are software configurable for either eight 11 bit single ended inputs or four 12 bit differential inputs An on board industry standard 82C55 programmable peripheral interface chip provides the
20. e reference signal connects to CHO IN LO CH1 IN LO CH2 IN LO or CH3 IN LO The third wire connects to GND A low noise precision programmable gain amplifier PGA is available on differential channels to provide gains of up to 20 and a dynamic range of up to 12 bits Differential mode input voltage ranges are 20 V 10 V 5 V 4 V x2 5 V 2 0 V 1 25 V and 1 0 V In differential mode the following two requirements must be met for linear operation Any analog input must remain in the 10V to 20V range with respect to ground at all times The maximum differential voltage on any given analog input pair must remain within the selected voltage range The input common mode voltage signal of the differential channel must be in the 10 V to 20 V range in order to yield a useful result For example you input a 4 V pp sine wave to CHHI and apply the same sine wave 180 out of phase to CHLO The common mode voltage is 0 V The differential input voltage swings from 4 V 4 V 8 V to 4 V 4 V 8V Both inputs satisfy the 10 V to 20 V input range requirement and the differential voltage is suited for the 10 V input range see Figure 3 5 4V Measured Signal CHHI ov 4V 23 8V Differential 8V 4V CHLO JU NEC 4V Y Figure 3 5 Differential Voltage Example Common Mode Voltage of 0 V If you increase the common mode voltage to 11 V the differential remains at 8
21. ich is written to local memory on the PMD 1208LS The channel list is made up of a channel number and range setting An example of a four element list is shown in Table 3 3 Table 3 3 Sample channel gain queue list Element Channel Range 0 CHO BIP10V t 1 CHO BIP5V 2 CH7 BIP10V 3 CH2 BIPIV Ld When a scan begins with the gain queue enabled the PMD 1208L S reads the first element sets the appropriate channel number and range and then acquires a sample The properties of the next element are then retrieved and another sample is acquired This sequence continues until all elements in the gain queue have been selected When the end of the channel list is detected the sequence returns to the first element in the list This sequence repeats until the specified number of samples is gathered You must carefully match the gain to the expected voltage range on the associated channel otherwise an over range condition can occur Although this condition does not damage the PMD 1208LS it does produce a useless full scale reading It can also introduce a long recovery time from saturation which can affect the next measurement in the queue 3 12 Chapter 4 Specifications Typical for 25 C unless otherwise specified Specifications in italic text are guaranteed by design Analog input section sample FIFO Parameter Conditions Specification
22. isition Software CD contains the following software InstaCal installation calibration and test utility TracerDAQ suite of virtual instruments SoftWIRE for VS NET SoftWIRE MCC DAQ Components for NET Software 7Ca includes c SoftwiRe po and more 2 1 PMD 1208LS User s Guide Installing the PMD 1208LS Documentation In addition to this hardware user s guide you also receive the DAQ Software Quick Start available in PDF at www mccdaq com PDFmanuals DAQ Software Quick Start pdf Please read this booklet completely before installing any software and hardware DAQ Software Quick Start Unpacking the PMD 1208LS As with any electronic device you should take care while handling to avoid damage from static electricity Before removing the PMD 1208LS from its packaging ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge If your PMD 1208LS is damaged notify Measurement Computing Corporation immediately by phone fax or e mail Phone 508 946 5100 and follow the instructions for reaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport measurementcomputing com Installing the software Refer to the DAQ Software Quick Start for instructions on installing the software on the Measurement Computing Data Acquisition Software CD This booklet 1s available in P
23. nforms to the above Directives and Standards rre Carl Haapaoja Vice President of Design Verification Measurement Computing Corporation 16 Commerce Boulevard Middleboro Massachusetts 02346 508 946 5100 Fax 508 946 9500 E mail info mccdag com www mccdag com
24. ode i 2048 4095 FS Figure 3 12 ADC Transfer function with gain error For example the PMD 1208LS exhibits a typical calibrated gain error of 0 2 on all ranges For the 10 V range this would yield 10 V x 0 002 20 mV This means that at full scale neglecting the effect of offset for the moment the measurement would be within 20 mV of the actual value Note that gain error is expressed as a ratio Values near FS are more affected from an absolute voltage standpoint than are values near mid scale which see little or no voltage error Combining these two error sources in Figure 3 13 we have a plot of the error band of the PMD 1208LS for the 10 V range This is a graphical version of the typical accuracy specification of the product The accuracy plots in Figure 3 13 are drawn for clarity and are not drawn to scale Input Voltage Ideal 9 77mMV 20 mV Ideal Ideal 9 77MV 20 mV Output Code Ideal 9 77MV 20 mV gt Ideal gt FS Ideal 9 77mV 20 mV gt Figure 3 13 Error band plot 3 11 PMD 1208LS User s Guide Functional Details PMD 1208LS channel gain queue feature The PMD 1208LS s channel gain queue feature allows you to set up a scan sequence with a unique per channel gain setting and channel sequence The channel gain queue feature removes the restriction of using an ascending channel sequence at a fixed gain This feature creates a channel list wh
25. of National Instruments All other trademarks are the property of their respective owners Information furnished by Measurement Computing Corporation is believed to be accurate and reliable However no responsibility is assumed by Measurement Computing Corporation neither for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or copyrights of Measurement Computing Corporation All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and or devices without the written approval of the CEO of Measurement Computing Corporation Life support devices systems are devices or systems which a are intended for surgical implantation into the body or b support or sustain life and whose failure to perform can be reasonably expected to result in injury Measurement Computing Corporation products are not designed with the components required and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people
26. ourself and others damaging your hardware or losing your data ib Angle brackets that enclose numbers separated by a colon signify a range of numbers such as those assigned to registers bit settings etc bold text Bold text is used for the names of objects on the screen such as buttons text boxes and check boxes For example 1 Insert the disk or CD and click the OK button italic text Italic text is used for the names of manuals and help topic titles and to emphasize a word or phrase For example The nstaCal amp installation procedure is explained in the DAQ Software Quick Start Never touch the exposed pins or circuit connections on the board Where to find more information The following electronic documents provide information that can help you get the most out of your Personal Measurement Device brand PMD 1208LS MCC s Specifications PMD 1208LS the PDF version of Chapter 4 in this guide is available on our web site at www mccdaq com pdfs PMD 1208LS pdf MCC s DAQ Software Quick Start is available on our web site at www mccdaq com PDFmanuals DAQ Software Quick Start pdf MCC s Universal Library User s Guide is available on our web site at www mccdaq com PDFmanuals sm ul user guide pdf MCC s Universal Library Function Reference is available on our web site at www mccdaq com PDFmanuals sm ul functions pdf MCC s Universal Library for LabVIEW User s Guide is available on our web site at www m
27. put current you can calculate the total current requirement of the PMD 1208LS USB 5 V as follows 3 8 PMD 1208LS User s Guide Functional Details PMD 1208LS 20 mA 16 DIO 2 5 mA ea 2 AO 30 mA ea 120 mA For an application running on a PC or powered hub the maximum available excess current is 500 mA 120 mA 380 mA This number is the total maximum available current at the PC 5V screw terminals Measurement Computing highly recommends that you figure in a safety factor of 20 below this maximum current loading for your applications A conservative safe user maximum in this case would be in the 300 320 mA range Since laptop computers typically allow up to 100 mA the PMD 1208LS in a fully loaded configuration may be above that allowed by the computer In this case you must determine the per pin loading in the application to ensure that the maximum loading criteria is met The per pin loading is calculated by simply dividing the 5 V by the load impedance of the pin in question Ground terminals The 10 ground GND connections are identical and provide a common ground for all PMD 1208LS functions Refer to the pinout diagrams on page 3 4 for the location of the GND terminal pins Calibration terminal The CAL connection pin 16 is an output you should use only to calibrate the PMD 1208LS Refer to the pinout diagrams on page 3 4 for the location of this pin Calibration of the PMD 1208LS is software controlled
28. rupt type endpoint operation The maximum throughput sample rate in software paced mode is 50 S s Continuous scan mode In continuous scan mode you can acquire data from up to eight channels The analog data is continuously acquired converted to digital values and written to an on board FIFO buffer until you stop the scan The FIFO buffer is serviced in blocks as the data is transferred from the PMD 1208LS to the memory buffer on your computer The maximum continuous scan rate of 1 2 kS s is an aggregate rate The total acquisition rate for all channels cannot exceed 1 2 kS s You can acquire data from one channel at 1 2 kS s two channels at 600 S s and four channels at 300 S s You can start a continuous scan with either a software command or with an external hardware trigger event Burst scan mode In burst scan mode you can acquire data using the full capacity of the PMD 1208LS 4 k sample FIFO You can initiate a single acquisition sequence of up to 4096 samples channels by either a software command or an external hardware trigger The captured data is then read from the FIFO and transferred to a user buffer in the host PC Burst scans are limited to the depth of the on board memory as the data is acquired at a rate faster than it can be transferred to the computer The maximum sampling rate is an aggregate rate The maximum rates that you can acquire data using burst scan mode is 8 kS s divided by the number of channels in the scan E
29. s at no load V is system dependent and may be less than 5 volts PMD 1208LS User s Guide Specifications Digital input output Digital type 82C55 Number of I O 16 Port AO through A7 Port BO through B7 Configuration 2 banks of 8 Pull up pull down All pins pulled up to Vs via 47K resistors default Positions available for pull down configuration to ground Hardware selectable via zero ohm resistors as a factory option Input high voltage 2 0V min 5 5V absolute max Input low voltage 0 8V max 0 5V absolute min Output high voltage 3 0V min IOH 2 5mA Output low voltage 0 4V max IOL 2 5mA External trigger Parameter Conditions Specification Trigger Source Note 4 External Digital TRIG_IN Trigger mode Software selectable Level Sensitive user configurable for TTL level high or low input Trigger latency Burst 25us min 50us max Trigger pulse width Burst 40us min Input high voltage 3 0V min 15 0V absolute max Input low voltage 0 8V max Input leakage current 1 0uA Note 4 TRIG IN is protected with a 1 5KOhm series resistor Counter section Counter type Event counter Number of Channels 1 Input source CTR screw terminal Resolution 32 bits Schmidt Trigger Hysteresis 20mV to 100mV Input Leakage Current tluA Maximum input frequency 1 MHz High pulse width 500ns min
30. t We use a 10 V range here as an example of what you can expect when performing a measurement in this range Input Voltage Output Code Figure 3 10 Ideal ADC transfer function The PMD 1208LS offset error is measured at mid scale Ideally a zero volt input should produce an output code of 2048 Any deviation from this is an offset error Figure 3 11 shows the PMD 1208LS transfer function with an offset error The typical offset error specification on the 10 V range is 9 77 mV Offset error affects all codes equally by shifting the entire transfer function up or down along the input voltage axis The accuracy plots in Figure 3 11 are drawn for clarity and are not drawn to scale Input Voltage Ideal Offset 9 77mwV e PRY 2048 Output Code 9 77mv A 4095 9 netus auti inopi FS Figure 3 11 ADC transfer function with offset error PMD 1208LS User s Guide Functional Details Gain error is a change in the slope of the transfer function from the ideal and is typically expressed as a percentage of full scale Figure 3 12 shows the PMD 1208LS transfer function with gain error Gain error is easily converted to voltage by multiplying the full scale FS input by the error The accuracy plots in Figure 3 12 are drawn for clarity and are not drawn to scale Input Voltage Gain error 0 2 or 20 mv Gain error 0 2 or 20 mV E 4 E Actual Output C
31. the signal to be measured connects to CH IN The second wire connects to GND The input range for single ended mode is 10V No other ranges are supported in single ended mode Figure 3 3 illustrates a typical single ended measurement connection D Figure 3 3 Single ended measurement connection The following image shows the single ended measurement data acquired by TracerDAQ GI TracerDAQ Strip Chart OL WA File Edit View Run Help ajx alzel vll x 100 9V battery Acquisition Rate secs sample ME SetRate _ Number of points displayed 100 1 minutes 40 seconds Using a rate faster than 1 sec sample may lead to timing inaccuracies CEEE Zoom Of Figure 3 4 TracerDAQ plot of single ended measurement data 3 5 PMD 1208LS User s Guide Functional Details Single ended measurements using differential channels To perform a single ended measurement using differential channels connect the signal to CHn IN HI input and ground the associated CHz IN LO input Differential configuration When all of the analog input channels are configured for differential input mode four analog channels are available In differential mode the input signal is measured with respect to the low input The input signal is delivered through three wires The wire carrying the signal to be measured connects to CHO IN HI CH1 IN HI CH2 IN HI or CH3 IN HI The wire carrying th
32. ther Found New Hardware balloon or dialog opens after the first closes that identify the PMD 1208LS as a USB Human Interface Device When this balloon or dialog closes the installation is complete The LED on the PMD 1208LS should flash and then remain lit This indicates that communication is established between the PMD 1208LS and your computer Caution Do not disconnect any device from the USB bus while the computer is communicating with the PMD 1208LS or you may lose data and or your ability to communicate with the PMD 1208LS If the LED turns off If the LED is illuminated but then turns off the computer has lost communication with the PMD 1208LS To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the LED should turn back on 2 3 Chapter 3 Functional Details Theory of operation analog input acquisition modes The PMD 1208LS can acquire analog input data in three different modes software paced continuous scan and burst scan Software paced mode In software paced mode you can acquire one analog sample at a time You initiate the A D conversion by calling a software command The analog value is converted to digital and returned to the computer You can repeat this procedure until you have the total number of samples that you want from one channel Software pacing is limited by the 20 mS round trip requirement of a USB inter
33. tified in Figure 3 2 Pin 20 Pin 1 690000060900009000000 Personal Measurement Device 05600099900009900090 M He sss d Pin 40 Pin 21 Figure 3 2 PMD 1208LS Screw terminal pin numbers PMD 1208LS User s Guide Functional Details Screw terminal pins 1 20 The screw terminals on the top edge of the PMD 1208LS pins to 20 provide the following connections Eight analog input connections CHO IN to CH7 IN Two analog output connections D A OUT 0 to D A OUT 1 One external trigger source TRIG IN One external event counter connection CTR Seven GND connections GND One calibration terminal CAL Screw terminal pins 21 40 The screw terminals on the bottom edge of the pins 21 to 40 provide the following connections 16 digital I O connections PortAO to Port A7 and Port BO to Port B7 One power connection PC 5 V Three ground connections GND Main connector and pin out Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG 3 3 Functional Details PMD 1208LS User s Guide IHNIOHD I S OV uod NIOHD IS S OV uod OINIOHD Z S LV Mod NIIHO Z S LW HOd QNO S ov HOd GND 16 S ZY HOd IHNILHO S V Mod NIZHO t O S V uod OTNIIHO S O S vv Mod NI HO S O 6 vv Mod QNO 916 S SV HOd GND 916 6 GV Jod IHNIZHO Z S SY 9v uod NITHO ZI S 9Y uod OTINIZHO 8 QS GS ZV Mod NISHO 8 S ZY MOd Q
34. via nstaCal Trigger terminal The TRIG IN connection pin 18 is an external digital trigger input You can configure this terminal with software for either trigger high or trigger low Counter terminal Pin 20 CTR is input to the 32 bit external event Refer to the pinout diagrams on page 3 4 for the location of this pin The internal counter increments when the TTL levels transition from low to high The counter can count frequencies of up to 1 MHz Accuracy The overall accuracy of any instrument is limited by the error components within the system Quite often resolution is incorrectly used to quantify the performance of a measurement product While 12 bits or part in 4096 does indicate what can be resolved it provides little insight into the quality of an absolute measurement Accuracy specifications describe the actual results that can be realized with a measurement device 3 9 PMD 1208LS User s Guide Functional Details There are three types of errors which affect the accuracy of a measurement system offset gain nonlinearity The primary error sources in the PMD 1208LS are offset and gain Nonlinearity is small in the PMD 1208LS and is not significant as an error source with respect to offset and gain Figure 3 10 shows an ideal error free PMD 1208LS transfer function The typical calibrated accuracy of the PMD 1208LS is range dependent as explained in the Specifications chapter of this documen
35. xternal components The PMD 1208LS has the following external components as shown in Figure 3 1 USB connector LED Screw terminal banks 2 3 1 PMD 1208LS User s Guide Functional Details Screw terminal Ka Pins 1 to 20 Screw termina Pins 21 to 40 Figure 3 1 PMD 1208LS external components USB connector The USB connector is on the right side of the PMD 1208LS housing This connector provides 5V power and communication The voltage supplied through the USB connector is system dependent and may be less than 5V No external power supply is required LED The LED on the front of the housing indicates the communication status of the PMD 1208LS It uses up to 5 mA of current and cannot be disabled Table 3 1 defines the function of the PMD 1208LS LED Table 3 1 LED illumination When the LED is It indicates Steady green The PMD 1208LS is connected to a computer or external USB hub Blinks continuously Data is being transferred Blinks three times Initial communication is established between the PMD 1208LS and the computer Blinks at a slow rate The analog input is configured for external trigger The LED stops blinking and illuminates steady green when the trigger is received Screw terminal wiring The PMD 1208LS has two rows of screw terminals one row on the top edge of the housing and one row on the bottom edge Each row has 20 connections Pin numbers are iden
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