Home

Personal Daq/3000 User`s Manual

1. not include noise due to quantizing of returned Q gt yal Q c gt e O 2 mn e Z 100 1000 100000 Oversampling Rate 7 2 Specifications 937492 Note Specifications are subject to change without notice Worst Case Temperature Measuerment Error vs Personal Daq3000 Ambient Temperature with Thermocouple at 0 C Excludes Thermocouple Error AutoZero Disabled Selected Thermocouple Types T J K and E N Temperature Measurement Error C for Types T J K E 10 20 30 Ambient Temperature C Worst Case Temperature Measuerment Error vs PDaq3000 Ambient Temperature with Thermocouple at 0 C Excludes Thermocouple Error AutoZero Enabled Selected Thermocouple Types T J K and E N O Temperature Measurement Error C for Types T J K E O on on 10 20 30 Ambient Temperature C Note Specifications are subject to change without notice 937492 Specifications 7 3 Voltage 4 7 L9 OTTU CG y eal 10V to 10V 0 031 0 008 0 031 0 009 0 031 0 010 0 031 0 02 0 031 0 04 200mV_
2. During software installation Adobe PDF versions of user manuals will automatically install onto your hard drive as a part of product support The default location is in the Programs group which can be accessed from the Windows Desktop Initial navigation is as follows Start Desktop Start pull down menu gt Programs gt IOtech DaqX Software You can also access the PDF documents directly from the data acquisition CD by using the lt View PDFs gt button located on the opening screen Refer to the PDF documentation for details regarding both hardware and software A copy of the Adobe Acrobat Reader is included on your CD The Reader provides a means of reading and printing the PDF documents Note that hardcopy versions of the manuals can be ordered from the factory Table of Contents Personal Daq 3000 Series Installation Guide p n 1136 0940 1 Device Overviews Block Diagrams 1 1 Connections 1 2 Theory of Operation 1 3 Software 1 15 2 Connections and Pinouts Overview 2 1 Pinout for Personal Daq 3000 Series Modules 2 2 PDQ30 Analog Expansion Option 2 3 Connecting for Single Ended or Differential 2 5 3 CE Compliance Overview 3 1 CE Standards and Directives 3 1 Safety Conditions 3 2 Emissions Immunity Conditions 3 2 4 Calibration 5 Counter Input Modes Tips for Making High Speed Coun
3. 3 1 Safety Conditions 3 2 Emissions Immunity Conditions 3 2 CE standards were developed by the European Union EU dating from 1985 and include specifications both for safety and for EMI emissions and immunity Now all affected products sold in EU countries must meet such standards Although not required in the USA these standards are considered good engineering practice since they enhance safety while reducing noise and ESD problems In contracted and in in house testing most products met the required specifications Those products not originally in compliance were redesigned accordingly In some cases alternate product versions shield plates edge guards special connectors or add on kits are required to meet CE compliance CE compliant products bear the CE mark and include a Declaration of Conformity stating the particular specifications and conditions that apply The test records and supporting documentation that validate the compliance are kept on file at the factory CE Standards and Directives The electromagnetic compatibility EMC directives specify two basic requirements 1 The device must not interfere with radio or telecommunications 2 The device must be immune from electromagnetic interference from RF transmitters etc The standards are published in the Official Journal of European Union under direction of CENELEC European Committee for Electrotechnical Standardization The specific standards
4. Notice that some of the analog channels in the scan group are from a PDQ30 expansion module All analog channels are sampled at the same rate of lus Analog channels on the PDQ30 can also have any of the gain ranges applied Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 5 Example 2 Analog channel scanning of voltage and temperature inputs The figure below shows a more complicated acquisition The scan is programmed pre acquisition and is made up of 6 analog channels Ch0 Ch2 Ch5 Ch11 Ch22 Ch23 Each of these analog channels can have a different gain Two of the channels 22 and 23 are from a PDQ30 expansion module These two channels can be programmed to directly measure thermocouples In this mode oversampling is programmable up to 16384 oversamples per channel in the scan group When oversampling is applied it is applied to all analog channels in the scan group including temperature and voltage channels Digital channels are not oversampled If the desired number of oversamples is 256 then each analog channel in the scan group will take 256 microseconds the returned 16 bit value represents an average of 256 consecutive lus samples of that channel The acquisition is triggered and 16 bit values each representing an average of 256 stream to the PC via USB2 Since two of the channels in the scan group are temperature channels the acquisition engine will be required to read a cold junction compens
5. 1 10 Daq Systems and Device Overviews 988093 Personal Daq 3000 Series User s Manual Calibration Every range of a Personal Daq 3000 Series device is calibrated at the factory using a digital NIST traceable calibration method This method works by storing a correction factor for each range on the unit at the time of calibration The user can adjust the calibration of the board while it is installed in the acquisition system without destroying the factory calibration This is accomplished by having 3 distinct calibration tables in the on board EPROM The user can select any of the three cal tables provided factory user or self cal tables by API call or from within software Self cal can be performed automatically via the included software and without the use of external hardware or instruments Self cal derives its tracebility through an on board reference which has a stability of 0 005 per year Note that a 2 year calibration period is recommended for Personal Daq 3000 Series modules Reference Note Chapter 4 Calibration discusses using a temperature calibrator with a Personal Daq 3000 Series module Analog Output Personal Dagq 3000 and 3001 Only Personal Daq 3000 has two 16 bit 1 MHz analog output channels Personal Daq 3001 has four such channels Analog outputs can be updated at a maximum rate of 1 MHz The channels have an output range of 10V to 10V Each D A can continuously output a waveform This can be read from PC
6. In this case Differential mode is being used The HI line from the thermocouple is shown connected to Channel 1 HI and the LO negative side is TB2 connected to Channel 1 LO Notice that Channel LO is the same screw terminal connection that would be used for CH 9 Single Ended To differentially connect a thermocouple connect the red T C wire to the channel s Low L connector Connect the other color wire to the channel s High H connector PDQ30 is an optional analog expansion module that can be used to add an additional 48 SE or 24 DE analog inputs PDQ30 is not to be connected to a live device Unplug the USB cable from the host PC prior to connecting the PDQ30 Refer to user s manual for regarding PDQ30 issues Power Consumption Typical 3000 2500 mW 3001 3000 mW oe een 2A dapter TR 2 will b ired if the USB port ot supply power adapter 2 will be required if the port cann 3000 amp PDQ30 2900 mW adequate power When meeting USB2 standards a USB port can supply 3001 amp PDQ30 3400 mW Required 2500 mW nominal at 5V 500 mA 3005 amp PDQ30 2400 mW Recommended The power consumption listed is for a single 3000 Series device or for a single device connected to a PDQ30 expansion module 1136 0940 rev 3 0 324400D 01 Printed in Hungary If using a TR 2 be sure to supply power from it to the Personal Daq 3000 before connecting the USB cable to the computer This allows the device to
7. Note 2 Oplonal povas sourte TR 2 adapter connect to ihe Extemal Pora connector i the USB Guinat supply enough power See Spec ications in regard to power Consumption Block Diagram for Personal Dagq 3005 Connections Reference Note For the Personal Daq 3000 Series installation procedure refer to the Personal Daq Installation Guide 1136 0940 A copy of the guide is included at the beginning of this manual USB2 0 Used to connect the Personal Daq 3000 Series device to a host PC or USB hub via one of the following cables CA 179 1 CA 179 3 CA 179 5 1 m 3m and 5m lengths respectively External Used to connect the device to an optional TR 2 external power supply when the host PC s Power USB connector cannot supply enough power or when an independent source of power is desired DSUB25F The 25 pin female connector can connect directly to a PDQ30 or can connect to a PDQ30 indirectly via a CA 96A cable Screw Six removable screw terminal blocks provide connection for signal I O Each device in the Terminal series supports 16SE 8DE Analog Inputs 24 Digital I O 4 Counters and 2 Timers In Blocks addition the 3000 model supports 2 Analog Outputs and the 3001 model supports 4 Analog Outputs Connections are labeled on the devices Pinouts are included in Chapter 2 Use with USB1 1 will result in lower transfer soeed which may not support continuous data collection at high scan rates 1 2 Daq Systems and Devic
8. OPT4 Allows the mapped channel to gate the counter if desired When the mapped channel is high the counter is enabled When the mapped channel is low the counter is disabled but holds the count value The mapped channel can be any other input channel COUNTER OPTS Allows the mapped channel to decrement the counter With this option the input channel for the counter will increment the counter The mapped channel can be used to decrement the counter COUNTER OPT6 Allows the mapped channel to increment the counter instead of the main channel This option allows the counter to be used with any other input channel post debounce If the channel s input is used elsewhere for example gating another counter the counter for this channel does not need to go unused Asynchronously Reading These Counters If the counter is in asynchronous mode the clear on read mode 1s available The counter s lower 16 bit value should be read first This will latch the full 32 bit result and clear the counter The upper 16 bit value can be read after the lower 16 bit value Also counters can only be asynchronously read in modes that allow the mapped channel to latch the data 1 e Counter and Encoder modes However it is possible for the user to use that read strobe as a mapped channel elsewhere if desired For example the read strobe could be used to increment or decrement the counter Personal Daq 3000 Series User s Manual 887894 Counter Input
9. 5 A D Specifications Type Successive approximation Resolution 16 bit Maximum Sample Rate 1 MHz Nonlinearity Integral 2 LSB maximum Nonlinearity Differential 1 LSB maximum Input Sequencer Analog digital and counter inputs can be scanned synchronously based on either an internal programmable timer or an external clock source Analog and digital outputs can be synchronized to either of these clocks Scan Clock Sources 2 Note The maximum scan clock rate is the inverse of the minimum scan period The minimum scan period is equal to 1us times the number of analog channels If a scan contains only digital channels then the minimum scan period is 250 ns 1 Internal programmable Analog Channels from 1 us to 19 hours in 20 83 ns steps Digital Channels and Counters from 250 ns to 19 hours in 20 83 ns steps 2 External TTL level input Analog Channels down to 1 us minimum Digital Channels and Counters down to 250 ns minimum Programmable Parameters per Scan Channel random order gain Depth 512 locations On module Channel to Channel Scan Rate Analog 1 MHz maximum Digital 4 MHz if no analog channels are enabled 1 MHz with analog channels enabled External Acquisition Scan Clock Input Maximum rate 1 0 MHz Clock Signal Range Logical zero OV to 0 8V Logical one 2 4V to 5 0V Minimum pulse width 50 ns high 50 ns low 7 6 Specifications 937492 Note Specifications are subject to change without notice Trigge
10. A and phase B signals 2 channels are supported with phase A phase B and index Z signals 1 channel is supported Quadrature encoders generally have 3 outputs A B and Z The A and B signals are pulse trains driven by an optical sensor inside the encoder As the encoder shaft rotates a laminated optical shield rotates inside the encoder The shield has three concentric circular patterns of alternating opaque and transparent windows through which an LED will shine There is one LED for each of the concentric circular patterns and likewise one phototransistor One phototransistor produces the A signal another phototransistor produces the B signal and the last phototransistor produces the Z signal The concentric pattern for A has 512 window pairs or 1024 4096 etc The concentric pattern for B has the same number of window pairs as A except that the entire pattern is rotated by 1 4 of a window pair Thus the B signal will always be 90 degrees out of phase from the A signal The A and B signals will pulse 512 times or 1024 4096 etc per complete rotation of the encoder The concentric pattern for the Z signal has only one transparent window and therefore pulses only once per complete rotation Representative signals are shown in the following figure Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 15 Representation of Quadrature Encoder Outputs A B and Z As the encoder rotates the A or B signal is indic
11. Modes 5 7 Period Mode This mode allows for period measurement of the channel input The measurement period is the time from edge to edge either both rising or both falling Period data is latched as it becomes available and the data is logged by the 3000 Series module at the scan rate Therefore if the scan period is much faster than the input waveform there will be a great deal of repetition in the period values This repetition is due to the fact that updates take place only when another full period becomes available Gate Low Word High Word Tick size Increment p N Note 1 32 Bit Counter l Channel Input OPT2 Post Debounce Buter OPT4 OPT6 Mapped Channel 4 Channel Inputs gt ost Debounce is OPT 1 0 Period Counter 4 Asynchronous 1 10 100 1000 Read Strobes Period Mode There is one asynchronous read strobe for each of the four counter channels Note 1 Tick sizes are 20 83ns 208 3ns 2083ns and 20833ns derived from the 48 MHz system clock An example One channel s acquired data might be 0 0 0 0 80 80 80 80 79 79 79 79 81 81 81 81 This data represents the number of ticksize intervals counted during the period measurement The first value s returned will be zero since the counters are cleared at the beginning of the acquisition The data comes in sets of four since the scan period is about one fourth as long as the input channel s period Every time the period measu
12. Personal Daq 3001 4 DAC channels DACO DAC1 DAC2 DAC3 Resolution 16 bits Data Buffer PC based memory Output Voltage Range 10V Output Current 1 mA sourcing more current 1 to 10 mA may require a TR 2 power adapter option Offset Error 0 0045V maximum Digital Feedthrough lt 10 mV when updated DAC Analog Glitch lt 12 mV typical at major carry Gain Error 0 01 Update Rate 1 MHz maximum 19 hours minimum no minimum with external clock resolution 20 83 ns Settling Time 2 us maximum to rated accuracy Clock Sources 4 programmable 1 Internal D A clock independent of scanning input clock 2 Internal scanning input clock 3 External D A input clock independent of external scanning input clock 4 External scanning input clock 5V Logic Keeper Digital I O Terminal Block Acquisition Engine One Digital I O Channel Typical Channels 24 Ports 3 x 8 bit Each port is programmable as input or output Input Scanning Modes 2 programmable 1 Asynchronous under program control at any time relative to input scanning 2 Synchronous with input scanning Input Characteristics 220 series resistor 20 pF to common Logic Keeper Circuit Holds the logic value to 0 or 1 when there is no external driver Input Protection 15 kV ESD clamp diodes Input Levels Low 0 to 0 8V High 2 0V to 5 0V Output Levels Low lt 0 8V High gt 2 0V Output Characteristics Output 1 0 mA per pin sourcing more current 1 to 1
13. RAM or from a file on the hard disk In addition a program can asynchronously output a value to any of the D As for non waveform applications presuming that the D A 1s not already being used in the waveform output mode When used to generate waveforms the D As can be clocked in several different modes Each D A can be separately selected to be clocked from one of the following sources o Asynchronous Internal Clock The internal programmable clock can generate updates ranging from 1 5 Hz to 19 hours independent of any acquisition rate o Synchronous Internal Clock The rate of analog output update can be synchronized to the acquisition rate derived from 1 MHz to once every 19 hours o Asynchronous External Clock A user supplied external input clock can be used to pace the D A entirely independent of analog inputs o Synchronous External Clock A user supplied external input clock can pace both the D A and the analog input Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 11 Digital Inputs and Outputs Twenty four TTL level digital I O lines are included in each of the Personal Daq 3000 Series modules Digital I O can be programmed in 8 bit groups as either inputs or outputs and can be scanned in several modes see Input Scanning Ports programmed as input can be part of the scan group and scanned along with analog input channels or can be asynchronously accessed via the PC at any time including when
14. Triggering Connecting a Personal Daq 3000 Series device to a USB1 1 port or hub will result in lower transfer speed which may not support continuous data collection at high scan rates Note that Hi Speed USB2 0 ports are forty times faster than the earlier Full Speed USB1 1 versions When a computer has a board with USB 2 0 ports an Enhanced USB controller can be found in the Device Manager The Device Manager will also show two other USB controllers This is due to the fact that USB2 0 circuitry includes 3 chips one for the actual USB2 0 capable devices and two for backward USB1 1 compatibility Thus a USB 2 0 motherboard can host any USB device version 2 0 or lower assuming there are no defects with the board system and or device Notes on USB Hubs e USB 1 1 obsolete hubs will work on USB 2 0 ports but cannot utilize USB 2 0 capabilities Hi Speed and Full Low Speed USB devices can coexist on USB 2 0 hubs e USB 2 0 hubs can be used on computers with USB 1 1 ports but will not exhibit USB 2 0 capabilities e Minimize hub use and keep USB cables as short as possible e Regardless of the USB hub or port used if power to the Personal Daq 3000 Series device is insufficient connect a TR 2 power adapter to the unit s External Power jack e Only self powered hubs can supply sufficient power 500 mA at 5V nominal Verify that the AC to DC power supply for the self powered hub can supply at least 2 1 amps at 5 volts
15. a digital output to be updated based on the level of an analog digital or counter input In this mode the user associates a digital output bit with a specific input and specifies the level of the input where the digital output changes state The response time in this mode is dependent on the number of input channels being scanned and can typically be in the range of 2 to 20 usec Reference Note For detailed information regarding low latency control outputs see Chapter 6 1 12 Daq Systems and Device Overviews 988093 Personal Daq 3000 Series User s Manual Example 5 Analog channel scanning of voltage inputs and streaming analog outputs The figure below shows a simple acquisition The scan is programmed pre acquisition and is made up of 6 analog channels Ch0 Ch2 Ch5 Ch11 Ch22 Ch25 Each of these analog channels can have a different gain The acquisition is triggered and the samples stream to the PC via USB2 Each analog channel requires one microsecond of scan time therefore the scan period can be no shorter than 6 us for this example The scan period can be made much longer than 6 us up to 19 hours The maximum scan frequency is one divided by 6us or 166 666 Hz start of Scan start of Scan start of Scan start of Scan fol2 s irjaajes Jol2 s irjaa es Jol2s rrja es Jo 2 Js h1l22 25 DACx This example has all 4 DACs being updated and the 16 bits of digital IO These updates are performed at the same time as the ac
16. all safety cautions and operating conditions specified in the documentation for all hardware used e The host computer and all connected equipment must be CE compliant e All power must be off to the device and externally connected equipment before internal access to the device is permitted e Isolation voltage ratings do not exceed documented voltage limits for power and signal inputs All wire insulation and terminal blocks in the system must be rated for the isolation voltage in use Voltages above 30 Vrms or 60 VDC must not be applied if any condensation has formed on the device e Current and power use must not exceed specifications Do not defeat fuses or other over current protection Emissions Immunity Conditions 3 2 The specific immunity conditions for CE compliance vary by product but general immunity conditions include e Cables must be shielded braid type with metal shelled connectors Input terminal connections are to be made with shielded wire The shield should be connected to the chassis ground with the hardware provided e The host computer must be properly grounded e In low level analog applications some inaccuracy is to be expected when I O leads are exposed to RF fields or transients over 3 or 10 V m as noted on the Declaration of Conformity CE Compliance 898994 Personal Daq 3000 Series User s Manual Calibration 4 The DaqCal exe calibration utility does not support Personal Daq 3000 Series devices at
17. amplified or attenuated to allow greater accuracy and resolution can be expressed as Xn or dB The arrangement or operation of a circuit so that signals from another circuit or device do not affect the isolated circuit In reference to Daq devices isolation usually refers to a separation of the direct link between the signal source and the analog to digital converter ADC Isolation is necessary when measuring high common mode voltage Some transducers produce a voltage in linear proportion to the condition measured Other transducers e g thermocouples have a nonlinear response To convert nonlinear signals into accurate readings requires software to calibrate several points in the range used and then interpolate values between these points A device that collects signals from several inputs and outputs them on a single channel For the purposes of calculating accuracy range is equal to the full dynamic input voltage For example the full scale range is 20V for the 10 to 10V range The value of a signal on a channel at an instant in time When triggered the ADC reads the channel and converts the sampled value into a 12 or 16 bit value A series of measurements across a pre selected sequence of channels A programmable device that manages channels and channel specific settings An operation that gathers samples from multiple channels at the same instant and holds these values until all are sequentially converted to digital val
18. channels do not take up analog channel scan time In general the output of each channel s counter is latched at the beginning of each scan period called the start of scan Every time the 3000 Series module receives a start of scan signal the counter values are latched and are available to the unit The Personal Dag clears all counter channels at the beginning of the acquisition This means that the values returned during scan period 1 will always be zero The values returned during scan period 2 reflect what happened during scan period 1 The scan period defines the timing resolution for the Personal Daq 3000 Series If you need a higher timing resolution shorten the scan period v Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 19 Wiring for 2 Encoders The following figure illustrates single ended connections for two encoders Differential connections are not applicable Ground to Digital Common Counter 0 To Encoder 1 A Counter 1 To Encoder 1 B Counter 2 To Encoder 2 A Counter 3 To Encoder 2 B To External Power To Ground ENCODER ENCODER Two Encoders Connected to Personal Daq 3000 The ground depicted at the left is associated with Digital Common on the Personal Daq 3000 Series module The ground depicted at the right is associated with the external power source Connect two encoders to the 3000 Series device as shown in the table below E
19. greater than 50kHz use the 15 50kHz 1ppm range The values returned will have sampling error that is greater than 1ppm but they can be averaged by the PC software to further reduce the sampling error 5 10 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual Pulsewidth Mode This mode provides a means to measure a channel s pulsewidth The measurement is the time from the rising edge to the falling edge or visa versa The measurement will be either pulsewidth low or pulsewidth high depending upon the edge polarity set in the debounce module Every time the pulsewidth measurement is latched from the counter the counter is immediately cleared and enabled to count the time for the next pulsewidth The pulsewidth measurements are latched as they become available Low Word High Word Tick size Increment Counter Latch Channel Input OPT2 Post Debounce Lis OPT6 Mapped Channel 4 Channel Inputs Post Debounce 4 Asynchronous Read Strobes There is one asynchronous read strobe for each of the four counter channels Note 1 Tick sizes are 20 83ns 208 3ns 2083ns and 20833ns derived from the 48 MHz system clock Pulse Detector Pulsewidth Mode An example one channel s acquired data might be 0 0 0 0 80 80 80 80 79 79 79 79 81 81 81 81 This data represents the number of ticksize intervals counted during the pulsewidth measurement The first value s returned will be zero since the c
20. have the stop at the top option enabled this option dictates whether the measurement has a range of 0 to 65535 ticks or 0 to 4 294 967 295 ticks 5 14 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual Encoder Mode TIP When using a counter for a trigger source it is a good idea to use a pre trigger with a value of at least 1 The reason is that all counters start at zero with the initial scan and there will be no valid reference in regard to rising or falling edge Setting a pre trigger to 1 or more ensures that a valid reference value is present and that the first trigger will be legitimate Introduction Rotary shaft encoders are frequently used with CNC equipment metal working machines packaging equipment elevators valve control systems and in a multitude of other applications in which rotary shafts are involved The encoder mode allows the 3000 Series module to make use of data from optical incremental quadrature encoders When in the encoder mode the Personal Daq accepts single ended inputs When reading phase A phase B and index Z signals the 3000 Series device provides positioning direction and velocity data df fel The Personal Daq 3000 Series module can only receive input from up to two encoders N 3000 Series Personal Daqs support quadrature encoders with a 16 bit Counter Low or a 32 bit Counter High counter 20 MHz frequency and x1 x2 and x4 count modes With only phase
21. inform the host computer upon connection of the USB cable that the unit requires minimal power from the computer s USB port Use a CA 179 x USB cable to connect the Personal Daq 3000 2 gt Personal Daq 3000 Series device to a USB ie port on the computer Note that use of a PC with a USB2 0 port is recommended A USB1 1 port will work but will result in lower performance 120 VAC Step 3 Start DaqView amp oma Configure the System Rote ree From Windows open DaqView by double clicking on its icon or use the Windows E AN 01 ie Sal y gt a A bed Desktop Start menu to access the program 1 pee Dw TE Nee 5 aS 8 9 10 11 You will find DagView listed in the Program batent SunEnd AASA SEED eee group Use the desktop Start Menu Analog amp Scanned Digital Inputs Programs to access the group H Once the program is executed software 13 14 5S 16 217 neading automatically identifies your Personal Daq 3000 Series device and brings up DaqView s Main Window Bipolar CHOO Bipolar CHO w 2 000 10 Bipolar CHO Y 1 000 Button Reference 1 Scope 2 Bar Graph 3 Analog Meters 4 Digital Meters 5 Start All 6 Stop All Meters Indicators Indicators 7 View File Data 8 Analog Output 9 Digital I O 10 Counter Timer 11 Waveform amp 12 Acquire Pattern Output 13 Show ALL 14 Hide INACTIVE 15 Turn All Visible 16 Turn All 17 Channel Channels Cha
22. present Please contact the factory for the latest calibration information concerning these products Every range of a Personal Daq 3000 Series device is calibrated at the factory using a digital NIST traceable calibration method This method works by storing a correction factor for each range on the unit at the time of calibration The user can adjust the calibration of the board while it is installed in the acquisition system without destroying the factory calibration This is accomplished by having 3 distinct calibration tables in the on board EPROM The user can select any of the three cal tables provided factory user or self cal tables by API call or from within software Self cal can be performed automatically via the included software and without the use of external hardware or instruments Self cal derives its tracebility through an on board reference which has a stability of 0 005 per year Note that a 2 year calibration period is recommended for Personal Daq 3000 Series modules Using a Temperature Calibrator The Personal Daq 3000 Series module provides accurate and repeatable temperature measurements across a wide range of operating conditions However all instrumentation is subject to drift with time and with ambient temperature change If the ambient temperature of the operating environment is below 18 C or above 28 C or if the product is near or outside its calibration interval then the absolute accuracy may be improved t
23. relevant to Daq equipment are listed on the product s Declaration of Conformity and include CISPR22 1985 EN55022 1988 Information Technology Equipment Class A for commercial industrial use and EN50082 1 1992 for various categories of EMI immunity The safety standard that applies to Daq products is EN 61010 1 1993 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Part 1 General Requirements Environmental conditions include the following e indoor use e altitude up to 2000 m e temperature 5 C to 40 C 41 F to 104 F e maximum relative humidity 80 for temperatures up to 31 C 87 8 F decreasing linearly to 50 relative humidity at 40 C 104 F e mains supply voltage fluctuations not to exceed 10 of the nominal voltage e other supply voltage fluctuations as stated by the manufacturer e transient overvoltage according to installation categories overvoltage categories I II and III For mains supply the minimum and normal category is II e pollution degree I or II in accordance with IEC 664 Personal Daq 3000 Series User s Manual 898994 CE Compliance 3 1 For clarification terms used in some Declarations of Conformity include e pollution degree any addition of foreign matter solid liquid or gaseous ionized gases that may produce a reduction of dielectric strength or surface resistivity Pollution Degree I has no influence on safety and implies the equipment is at o
24. represents one channel in timing mode The time desired 1s between the rising edge on the input channel and the falling edge on the mapped channel Zeroes are returned in the scan until one complete time measurement has been taken At that point the value time in ticks is latched and logged by the 3000 Series device until the next time measurement has been completed Rising edges on the input channel will clear the counter and falling edges on the mapped channel will latch the output of the counter at that time If the scan period is much slower than the rate of time frames coming available on the two channels then the data will miss some time frames The scan period can be decreased to capture more time frames The data returned is interpreted as time measured in ticks This data represents the number of ticksize intervals counted during the timing measurement There are four timebase settings 20 833 ns 208 33 ns 2 083 us and 20 83 us These are often referred to as tick sizes The 3000 Series device uses a 48 MHz 50 ppm oscillator as a timing source If the input signal has a poor slew rate the timing mode will provide variant results dependant upon the input switching threshold Channel Input a OO a E a Mapped Charnel Input A oo i Goo Example of One Channel in Timing Mode TIMING OPT2 This determines whether the time is to be measured with a 16 bit Counter Low or 32 bit Counter High counter Since time measurements always
25. settings simply view the analog waveform along with the counter output This can be done by connecting the source to an analog input Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 3 Use trigger before stable mode when the input signal has groups of glitches and each group is to be counted as one The trigger before stable mode will recognize and count the first glitch within a group but reject the subsequent glitches within the group if the debounce time is set accordingly The debounce time should be set to encompass one entire group of glitches as shown in the following diagram Debounce Time I I Input E LU LLU Trigger Before Stable l Trigger After Stable Trigger after stable mode behaves more like a traditional debounce function rejecting glitches and only passing state transitions after a required period of stability Trigger after stable mode is used with electro mechanical devices like encoders and mechanical switches to reject switch bounce and disturbances due to a vibrating encoder that is not otherwise moving The debounce time should be set short enough to accept the desired input pulse but longer than the period of the undesired disturbance as shown in the diagram below Debounce Time niii Trigger Before Stable Trigger After Stable l 5 4 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual Terms Applicable to Counter Modes The following terms and
26. the scan are True then the DAC2 voltage will be associated with the one most recently met 6 10 Setpoint Configuration for Output Control 887894 Personal Daq 3000 Series User s Manual The Setpoint Status Register Regardless of which software application you are using with a Personal Daq 3000 Series device a setpoint status register can be used to check the current state of the 16 possible setpoints In the register Setpoint 0 is the least significant bit and Setpoint 15 is the most significant bit Each setpoint is assigned a value of 0 or 1 0 indicates that the setpoint criteria is not met 1 e the condition is false 1 indicates that the criteria has been met 1 e the condition is true Related information is provided in the overview pages 6 1 and 6 2 In the following example the criteria for setpoints 0 1 and 4 is satisfied True but the criteria for the other 13 setpoints has not been met pSeoom jis 1a jisfa fofofo te 7 te s ba ts fa ft fo True 1 False 0 lt lt lt Most Significant Bit Least Significant Bit gt gt gt From the above table we have 10011 binary or 19 decimal derived as follows Setpoint 0 having a True state shows 1 giving us decimal 1 Setpoint 1 having a True state shows 1 giving us decimal 2 Setpoint 4 having a True state shows 1 giving us decimal 16 For proper operation the Setpoint Status Register must be the last chann
27. there is at least one analog channel in the scan group The scan period can be made much longer than 6 us up to 19 hours The maximum scan frequency is one divided by 6us or 166 666 Hz Start of Scan Start of Scan Start of Scan Start of Scan o 2 s 11 22 25 az aiaa Joas iiiz o 2 5 11 22 25 Hd fH Scan Period The counter channels could be returning only the lower 16 bits of count value if that is sufficient for the application They could also be returning the full 32 bit result if necessary Similarly the digital input channel could be the full 24 bits if desired or only 8 bits if that is sufficient If the 3 counter channels are all returning 32 bit values and the digital input channel is returning a 16 bit value then 13 samples are being returned to the PC every scan period each sample being 16 bits 32 bit counter channels are divided into two 16 bit samples one for the low word and the other for the high word If the maximum scan frequency is 166 666 Hz then the data bandwidth streaming into the PC is 2 167 MSamples per second Some slower PCs may have a problem with data bandwidths greater than 6 MSamples per second All Personal Daq 3000 Series devices have an onboard 1 Msample buffer for acquired data Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 7 Example 4 Sampling digital inputs for every analog sample in a scan group The figure below shows another acquisition T
28. timer outputs Example Setpoint Detection on a Totalizing Counter In the following figure Channel 1 is a counter in totalize mode Two setpoints are used to define a point of change for Detect 1 as the counter counts upward The detect output will be high when inside the window greater than Limit B the low limit but less than Limit A the high limit In this case the Channel 1 setpoint is defined for the 16 lower bits of channel 1 s 32 bit value The P2C digital output port could be updated on a True condition the rising edge of the Detection signal Alternately one of the DAC output channels or timer outputs could be updated with a value STRAT LAS STITUTE SOLUS AE TEO S ULES WSU WSBT STI 65535 At this point we can update P2C or DACs Limit A Limit B cl Ss SEEEN SOENEN E AEE EENE OO 0 Logical Output Detection Channel 1 in Totalizing Counter Mode Inside the Window Setpoint The detection circuit works on data that is put into the acquisition stream at the scan rate This data is acquired according to the pre acquisition setup scan group scan period etc and returned to the PC Counters are latched into the acquisition stream at the beginning of every scan The actual counters may be counting much faster than the scan rate and therefore only every 10 100 or n count will show up in the acquisition data Therefore it is possible to set a small detection window on a totalizing counter channel and have the detectio
29. to be measured for pulsewidth Timing Mode see page 13 OPT2 Determines whether the time is to be measured with a 16 bit counter Counter Low or a 32 bit counter Counter High Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 5 Encoder Mode see page 15 OPT 1 0 Determines the encoder measurement mode 1X 2X or 4X OPT2 Determines whether the counter is 16 bits Counter Low or 32 bits Counter High OPT3 Determines which signal latches the counter outputs into the data stream going back to the module Start of scan or mapped channel OPT4 Allows the mapped channel to gate the counter OPTS Allows the mapped channel to clear the counter for Z reference Counter Totalize Mode The counter mode allows basic use of a 32 bit counter While in this mode the channel s input can only increment the counter upward When used as a 16 bit counter Counter Low one channel can be scanned at the 12 MHz rate When used as a 32 bit counter Counter High two sample times are used to return the full 32 bit result Therefore a 32 bit counter can only be sampled at a 6 MHz maximum rate If only the upper 16 bits of a 32 bit counter are desired then that upper word can be acquired at the 12 MHz rate The first scan of an acquisition always zeroes all counters It is usual for all counter outputs to be latched at the beginning of each scan however there is an option to change this A second channel referred to as t
30. 0 mA may require a TR 2 power adapter option Sampling 4 MHz maximum Update Rate 4 MHz maximum 19 hours minimum no minimum with external clock resolution 20 83 ns 7 8 Specifications 937492 Note Specifications are subject to change without notice Pattern Generation Output Two of the 8 bit ports can be configured for 16 bit pattern generation The pattern can be updated synchronously with an acquisition at up to 4 MHz Counters 3 3V 5V 10 K Terminal Counter Block 200 c One Counter Channel Typical Each of the four high speed 32 bit counter channels can be configured for counter period pulse width time between edges or multi axis quadrature encoder modes Counter inputs can be scanned synchronously along with analog and digital scanned inputs based on an internal programmable timer or an external clock source Channels 4 x 32 bit Input Frequency 20 MHz maximum Input Signal Range 5V to 10V Input Characteristics 10 KQ pull up 200Q series resistor 15 kV ESD protection Trigger Level TTL Minimum pulse width 25 ns high 25 ns low Debounce Times 16 selections from 500 ns to 25 5 ms Positive or negative edge sensitive Glitch detect mode or debounce mode Time Base Accuracy 50 ppm 0 to 50 C Five Programmable Modes Counter Period Pulsewidth Timing Encoder 1 Counter Mode Options Totalize Clear on Read Rollover Stop at all Fs 16 bit or 32 bit any other channel can gat
31. C to 13 C and 33 C to 70 C 0 031 0 008 2 0 5V to 5V 0 031 0 009 3 0 2V to 2V 0 031 0 010 2 0 0 031 0 02 3 5 0 031 0 04 5 5 8 0 0 042 0 10 14 0 Specifications assume differential input single channel scan 1 MHz scan rate unfiltered CMV 0 0V 30 minute warm up exclusive of noise range FS to FS Noise reflects 10 000 samples at 1 MHz typical differential short noe to 300 to 1400 1 Assumes 16384 oversampling applied CMV 0 0V 60 minute warm up still environment and 25 C ambient temperature excludes thermocouple error TC 0 C for all types except B 1000 C TR 2 for External Power Note Specifications are subject to change without notice 937492 Specifications 7 11 PDQ30 Type T Thermocouple Typical Performance of 12 PDQ30 Units 0 C Note 1 Channel Note 1 Assumes 16384 oversampling applied CMV 0 0V 60 minute warm up still environment and 25 C ambient temperature Excludes thermocouple error TCjy 0 0 C Accessories and Cables PDQ10 PDQ11 PDQ12 PDQ30 CA 96 CA 179 1 CA 179 3 CA 179 5 CN 153 12 TR 2 7 12 Specifications DIN rail mounting adapter Powered 4 port USB hub with 1 USB cable USB extension cable 16 ft requires TR 2 when used with Personal Daq 3000 Series Adds 48 SE or 24 DE channels to a Personal Daq 3000 Series module Characteristics of the expansion channels are identical to those of t
32. In general do not use more than three Personal Daq 3000 systems per one self powered hub Triggering can be the most critical aspect of a data acquisition application The Personal Daq 3000 series supports a full complement of trigger modes to accommodate any measurement situation Hardware Analog Triggering The Personal Daq 3000 Series uses true analog triggering whereby the trigger level programmed by the user sets an analog DAC which 1s then compared in hardware to the analog input level on the selected channel The result is analog trigger latency which is guaranteed to be less than 1 3 us Any analog channel can be selected as the trigger channel including built in or PDQ30 expansion channels The user can program the trigger level as well as the rising or falling edge and hysteresis When the starting out analog input voltage is near the trigger level and you are performing a rising or falling hardware analog level trigger it is possible that the analog level comparator will have already tripped i e to have tripped before the sweep was enabled If this is the case the circuit will wait for the comparator to change state However since the comparator has already changed state the circuit will not see the transition Solution 1 Set the analog level trigger to the desired threshold 2 Apply an analog input signal that is more than 2 5 of the full scale range away from the desired threshold This ensures that the compara
33. Modules Before you get started Verify that you have the following items e Personal Daq 3000 Series Device s e Data Acquisition CD e Monitor SVGA 1024 x 768 screen resolution e Computer that meets or exceeds the following Intel Pentium 1 GHz or equivalent 10 GB disk space Available USB Port USB cable one of the following Microsoft Operating Systems and indicated memory or higher WindowsXP 128 MB memory Windows2000 128 MB memory Windows Vista 1 GB memory Step 1 Install Software IMPORTANT Software must be installed before installing hardware 1 Place the Data Acquisition CD into the CD ROM drive Wait for PC to auto run the CD This may take a few moments depending on your PC If the CD does not auto run use the Desktop s Start Run Browse feature and run the Setup exe 2 After the intro screen appears follow the screen prompts Step 2 Connect Signal Lines and Hardware 1 Connect signal lines to the removable screw terminal blocks Analog Common CHO CHOHI CH8 CHOLO Analog Common CH 1 CH1HI CH9 CH1LO Analog Common CH 2 CH2HI CH 10 CH2LO Analog Common CH3 CH3HI CH 11 CH3LO Voltage signals can be connected using the Single Ended method In the figure voltage source V1 is connected to Channel 0 and to analog common and voltage source V2 is connected to Channel 8 and the same analog common connection Thermocouple The figure shows voltage V3 resulting from a thermocouple
34. Output Value 1 If False then perform no action Hysterisis Choose 1 True and False Mode If True then Output Value 1 If False then Output Value 2 Window e AboveA Hysterisis Mode Forced Update Hysterisis e BelowB If X gt Ais True then Output Value 2 until Mode X lt B is True then Output Value 1 Both conditions are If X lt Bis True then Output Value 1 until X gt A is True then checked when in Output Value 2 mettle ONE This is saying a If the input signal is outside the window high then Output Value 2 until the signal goes outside the window low and b if the signal is outside the window low then Output Value 1 until the signal goes outside the window high There is no change to the detect signal while within the window Value A defines the upper limit of the Window and Value B defines the low limit The detect signal has the timing resolution of the scan period as seen in the diagram below The detect signal can change no faster than the scan frequency 1 scan period Detectl Detect Detect aaa utter a ana aan tt 7 Teen CT Acquisition stream acan Group Ch 1 2 3 4 ete p Scan ig p lus Petiod i Example Diagram of Detection Signals for Channels 1 2 and 3 Each channel in the scan group can have one detection setpoint There can be no more than 16 setpoints in total applied to channels within a scan grou
35. Range 6 to 16 VDC used when USB port supplies insufficient power or when an independent power supply is desired Over Voltage 20 V for 10 seconds max Expansion Connector 25 pin DSUB female Physical Attributes Dimensions 269 mm W x 92 mm D x 45 mm H 10 6 x 3 6 x 1 6 Weight 431 g 0 95 Ibs Note Specifications are subject to change without notice 937492 Specifications Personal Daq 3000 and PDQ30 7 1 Analog Inputs Channels 16 single ended or 8 differential Programmable on a per channel basis as single ended or differential Expansion An additional 48 analog inputs per module via optional PDQ30 module Expansion channel features are identical to those of the main channels Expansion Connector 25 pin DSUB female Over Voltage Protection 30V without damage Voltage Measurement Speed 1 us per channel Ranges Software or sequencer selectable on a per channel basis 10V 5V 2V 1V 0 5V 0 2V 0 1V Input Impedance 10MQ single ended 20MQ differential Total Harmonic Distortion 80 dB typical for 10V range 1 kHz fundamental Signal to Noise and Distortion 72 dB typical for 10V range 1 kHz fundamental Bias Current 40 pA typical 0 C to 35 C Crosstalk 75 dB DC to 60 Hz 65 dB 10 kHz typical Common Mode Rejection 70 dB typical DC to 1 kHz Maximum Usable Input Voltage Common Mode Voltage Ranges Maximum CMV Vin 5 10V 10 5V Voltage Measurement Noise vs Oversampling
36. Related Equations 10 kHz F 1 MHz Divisor 1 200 Hz Divisor 1 MHz F 1 100 Hz Turns Timer OFF The divisor range is 0 to 65535 For Setpoint Operation 65535 turns the timer off In Asynchronous Write 65535 results in a timer output frequency of 15 259 Hz There are 2 timer outputs that can generate different square waves The timer outputs can be updated asynchronously at any time Both timer outputs can also be updated during an acquisition as the result of setpoints applied to analog or digital inputs See the section on pattern detection setpoints for more information and examples 1 14 Daq Systems and Device Overviews 988093 Personal Daq 3000 Series User s Manual Multiple Personal Daqs Multiple modules can be operated synchronously This is done by designating one as the master The other modules slaves are synchronized to the master by the pacer clock which is externally routed to the designated slave units For two or more Personal Daqs to be operated synchronously 1 Use coax or twisted pair wire to either a connect the APCR signals together or b connect the DPCR signals together 2 Connect Digital Common of each Personal Daq to one of the twisted pairs or to the shield of the coax Software Included with the 3000 Series is a complete set of drivers and example programs for the most popular programming languages and software packages Driver support includes Visual Basic C C La
37. USER S MANUAL Personal Daq 3000 Series USB 1 MHz 16 Bit Multifunction Modules Requires one of the following Operating Systems Windows 2000 Windows XP Windows Vista Personal Daq 3000 Personal Daq 3001 Personal Daq 3005 Personal Daq 3000 Series lOtech 1136 0901 rev 2 1 25971 Cannon Road oes Cleveland OH 44146 1833 440 439 4091 Fax 440 439 4093 AAU AAA N ee productsupport iotech com 372751A 01 www iotech com il Warranty Information Your Otech warranty is as stated on the product warranty card You may contact IOtech by phone fax machine or e mail in regard to warranty related issues Phone 440 439 4091 fax 440 439 4093 e mail sales iotech com Limitation of Liability IOtech Inc cannot be held liable for any damages resulting from the use or misuse of this product Copyright Trademark and Licensing Notice All IOtech documentation software and hardware are copyright with all rights reserved No part of this product may be copied reproduced or transmitted by any mechanical photographic electronic or other method without IOtech s prior written consent Otech product names are trademarked other product names as applicable are trademarks of their respective holders All supplied IOtech software including miscellaneous support files drivers and sample programs may only be used on one installation You may make archival backup copies CE Notice Warnings Many Ote
38. a scanned acquisition is occurring Two synchronous modes are supported when digital inputs are scanned along with analog inputs o Scanning digital inputs at the start of each scan sequence In this mode the digital inputs are scanned at the start of each scan sequence which means the rate at which they are scanned is dependent on the number of analog input channels and the delay period For example if 8 analog inputs were enabled with a 0 delay period then the digital inputs in this mode would be scanned at once per 8usec 1 e 125 kHz o Scanning digital inputs synchronously with every analog input channel In this synchronous mode the enabled digital inputs are scanned synchronously with every analog input channel So in the preceding example the digital inputs would be scanned at once per usec or 1 MHz If no analog inputs were being scanned the digital inputs could be scanned at up to 4 MHz Digital Outputs and Pattern Generation Digital outputs can be updated asynchronously at anytime before during or after an acquisition Two of the 8 bit ports can also be used to generate a 16 bit digital pattern at up to 4 MHz The Personal Daq 3000 Series modules support digital pattern generation In the same manner as analog output the digital pattern can be read from PC RAM or a file on the hard disk Digital pattern generation is clocked in the same four modes as described with analog output The ultra low latency digital output mode allows
39. ach signal A B can be connected as a single ended connection with respect to the common digital ground GND Both encoders will need powered from an external power source typically 5VDC Connect each encoder s power input to the external power source Connect the return to digital common GND on the same source The programming setup given below is just one example Other setups are possible TB5 Terminal 2 Encoder 1 Encoder Mode 1X option 16 bit counter Latch on SOS Counter 0 CNTO TB5 Terminal 1 Encoder 1 Period Mode 1Xperiod option 16 bit counter Map channel Counter 1 CNT1 doesn t gate Ticksize to 20833 ns TB4 Terminal 2 Encoder 2 A Encoder Mode 2X option 16 bit counter Latch on SOS Counter 2 CNT2 TB4 Terminal 1 Encoder 2 B Period Mode 1Xperiod option 16 bit counter Map channel Counter 3 CNT3 doesn t gate Ticksize to 2083 3 ns With the encoders connected in this manner there is no relative positioning information available on encoder 1 or 2 since there is no Z signal connection for either Therefore only distance traveled and velocity can be measured for each encoder 5 20 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual Setpoint Configuration for Output Control 6 Overview Overview 6 1 Detecting Input Values 6 3 Controlling Analog Digital and Timer Outputs 6 4 P2C DAC or Timer Update Latency 6 6 More Examples of C
40. al In line Package DIP Typically users set these switches to configure their particular application The differential mode measures a voltage between 2 signal lines for a single channel Also see single ended mode 887194 G 1 Differential mode voltage ESD Excitation Gain Isolation Linearization Multiplexer MUX Range Sample reading Scan Sequencer Simultaneous Sample and Hold Single ended mode Trigger TTL Unipolar Differential mode voltage refers to a voltage difference between two signals that are referenced to a common point Example Signal 1 is 5 VDC referenced to common Signal 2 is 6 VDC referenced to common If the 5 VDC signal is used as the reference the differential mode voltage is 1 VDC 6 VDC 5 VDC 1 VDC If the 6 VDC signal is used as the reference the differential mode voltage is 1 VDC 5 VDC 6 VDC 1 VDC Electrostatic discharge ESD is the transfer of an electrostatic charge between bodies having different electrostatic potentials This transfer occurs during direct contact of the bodies or when induced by an electrostatic field ESD energy can damage an integrated circuit IC Some transducers e g strain gages thermistors and resistance temperature detectors RTDs require a known voltage or current Typically the variation of this signal through the transducer corresponds to the condition measured The degree to which an input signal is
41. an be accessed from the Windows Desktop Refer to the PDF documentation for details regarding both hardware and software A copy of the Adobe Acrobat Reader is included on your CD The Reader provides a means of reading and printing the PDF documents Note that hardcopy versions of the manuals can be ordered from the factory 1 16 Daq Systems and Device Overviews 988093 Personal Daq 3000 Series User s Manual Connections and Pinouts 2 Overview 2 1 Pinout for Personal Daq 3000 Series Modules 2 2 PDQ30 Analog Expansion Option 2 3 Connecting for Single Ended or Differential 2 5 Turn off power to all devices connected to the system before connecting cables Electrical shock or damage to equipment can result even under low voltage conditions The discharge of static electricity can damage some electronic components Semiconductor devices are especially susceptible to ESD damage You should always handle components carefully and you should never touch connector pins or circuit components unless you are following ESD guidelines in an appropriate ESD controlled area Such guidelines include the use of properly grounded mats and wrist straps ESD bags and cartons and related procedures Overview Personal Daq 3000 Series modules communicate to the host PC via USB cable Each module has 6 removable blocks to provide convenient screw terminal connections for all signal I O A DSUB25F connector allows for exp
42. ansion via an optional PDQ30 module either through direct connection or indirectly via a CA 96A cable Pinouts for the Personal Daq 3000 Series modules follow In addition use of the optional PDQ30 analog expansion module is discussed and a pinout provided z p HF Removable TB Taimenal Block ji of 6 Terminal Block Orientation for Personal Dagq 3000 Series Note Terminal Block Orientation for PDQ30 is different Personal Daq 3000 Series User s Manual 888594 Connections amp Pinouts 2 1 Pinout for Personal Daq 3000 Series Modules USB2 0 Edge of Module Analog Common Digital Common DACO Note 1 Digital DAC1 Note 1 Digital Self Calibration A Digital CH5 Digital Common Digital CH 7 DPCR DAC Pacer Clock I O Timer 0 TMRO APCR A D Pacer Clock I O Timer 1 TMR 1 a Analog Common P Digital CH2 Counter 0 CNTO CH 11 CH3 LO Analog Counter 1 CNT1 EE EEE CH4 CH4HI Analog Digital CH 0 CH5 CH5HI Analog 3 Digital CH 3 CH6 CH6HI Analog Digital CH 6 CH 14 CH6LO Analog Digital CH 7 Analog Common Digital Common CH7 CH7HI Counter 2 CNT2 CH 15 CH7LO Counter 3 CNT3 DSUB25 Edge of Module Note 1 Personal Daq 3000 includes DACO and DAC1 Personal Daq 3001 includes DACO DAC1 DAC2 and DAC3 Personal Daq 3005 has no DACs Note 2 Personal Daq 3000 Series devices can measure 16 channels of voltage or 8 channels of temperature Temperature measurement requires the use o
43. aqViewXL Plus plus frequency domain analysis DASYLab Icon based data acquisition graphics control and analysis software 7 10 Specifications 937492 Note Specifications are subject to change without notice PDQ30 Specifications General Operating Temperature 30 to 70 C Storage Temperature 40 to 80 C Power Supplied by DaqBoard 3000 Series or Personal Daq 3000 Series 400 mW max Relative Humidity 0 to 95 non condensing Vibration MIL STD 810E category 1 and 10 Communications Connector 25 pin DSUB Signal I O Connector Six removable screw terminal blocks 12 connections each Dimensions 269mm W x 92mm D x 45 mm H 10 6 x 3 6 x 1 6 Weight 400g 0 88 Ibs Analog Inputs Channels 48 single ended inputs or 24 channels differential inputs Voltage Measurement Speed 1us per channel Ranges 10V 5V 2V 1V 500mV 200mV 100mV universal thermocouple Software or sequencer selectable on a per channel basis Total Harmonic Distortion 80dB typical for 10V range 1 kHz fundamental Signal to Noise and Distortion 72dB typical for 10V range 1 kHz fundamental Input Impedance 10M Ohm single ended 20M Ohm differential Bias Current 40 pA typical 0 to 35 C Over Voltage Protection 30V Crosstalk 75 dB DC to 60 Hz 65 dB 10 kHz typical Accuracy Temperature Coefficient Noise Voltage Reading Range ppm of Reading ppm Range c_ cts RMS Range 23 C 10 C 1 year 30
44. asuring all 8 temperature inputs and using oversampling of 256 the minimum scan period is 14 x 256 us or 3584 us Autozero may also be employed This adds more channels to the scan group and further reduces the maximum scan frequency Auto zero channels read a shorted analog input that is internal to the PDQ30 or PersonalDaq 3000 Series module Auto zeroing reduces drift due to fluctuating ambient temperatures or ambient temperatures outside the DC specifications Reference Note Appendix A includes detailed information regarding signal modes methods of noise reduction and averaging techniques 1 6 Daq Systems and Device Overviews 988093 Personal Daq 3000 Series User s Manual Example 3 Analog and digital channel scanning once per scan mode The figure below shows a more complicated acquisition The scan is programmed pre acquisition and is made up of 6 analog channels Ch0 Ch2 Ch5 Ch11 Ch22 Ch25 and 4 digital channels 16 bits of digital IO 3 counter inputs Each of the analog channels can have a different gain and each of the counter channels can be put into a different mode totalizing pulsewidth encoder etc The acquisition is triggered and the samples stream to the PC via USB2 Each analog channel requires one microsecond of scan time therefore the scan period can be no shorter than 6 us for this example All of the digital channels are sampled at the start of scan and do not require additional scanning bandwidth as long as
45. ation CJC temperature every scan In fact depending upon which PDQ30 channels are being used for temperature there may be a CJC temperature required for each temperature channel in the scan Each 4 channel terminal block of the PDQ30 shares one CJC so if all temperature channels are grouped on one of the six terminal blocks then only one CJC temperature measurement will need to be made per scan For every PDQ30 terminal block that is measuring at least one temperature channel one additional CJC temperature measurement will be automatically added to the scan group This increases the scan period and reduces the maximum scanning frequency Start of Scan Start of Scan Start of Scan Start of Scan Programmable Averaging up to 16384 Scan Period In this example the desired number of oversamples is 256 therefore each analog channel in the scan group requires 256 microseconds to return one 16 bit value The oversampling is also done for CJC temperature measurement channels The minimum scan period for this example is therefore 7 X 256 us or 1792 microseconds The maximum scan frequency is the inverse of this number 558 Hz Channels 0 through 7 of the Personal Daq 3000 can be used to measure temperature in place of voltage There are three CJC channels per analog input terminal block When all 8 differential analog inputs are used for temperature 6 CJC channels must be included as part of the scan group This means when the device is me
46. ative of the distance the encoder has traveled The frequency of A or B indicates the velocity of rotation of the encoder If the Z signal is used to zero a counter that is clocked by A then that counter will give the number of pulses the encoder has rotated from its reference The Z signal is a reference marker for the encoder It should be noted that when the encoder is rotating clockwise as viewed from the back A will lead B and when the encoder is rotating counter clockwise A will lag B If the counter direction control logic is such that the counter counts upward when A leads B and counts downward when A lags B then the counter will give direction control as well as distance from the reference An Example of Encoder Accuracy If there are 512 pulses on A then the encoder position is accurate to within 360 degrees 512 Even greater accuracy can be obtained by counting not only rising edges on A but also falling edges on A giving position accuracy to 360 degrees 1024 The ultimate accuracy is obtained by counting rising and falling edges on A and on B since B also has 512 pulses This gives a position accuracy of 360 degrees 2048 These 3 different modes are known as 1X 2X and 4X The 3000 Series module implements all of these modes and functions as described in the following options Gate O OPT4 Channel Input Increment Pow Word Post Debounce a if A leads B High Word OTRO GIRZ Decrement Increment 32 Bit z B if A
47. ave the ability to provide various frequency ranges that are based upon different ticksizes averaging options and counter size 16 bit or 32 bit values The frequency ranges are designed to fit a wide array of possible applications Within each range the sampling error decreases dramatically as the input period increases The ranges will get smaller as required accuracy increases Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 9 Option Option 150u 15m 2083 333 10 1k 2083 333 1500u 150m 208 333 100 10k 208 333 150m 15 20 833 10k 1M 20 833 1500m 150 20 833 100k 5M 20 833 15 1500 20 833 1000 1M 5M 20 833 1000 Frequency Ranges for a 16 bit value sampling error is less than 0 21 Each frequency range given in the previous table set can be exceded If the input waveform goes under range by too much the counter value will top out at 65535 indicating you have reached the lowest possible frequency that can be measured on that range If the input waveform goes over range by too much the counter will return values that are very course and have a lot of sampling error The values returned will have a small number of counts for the period duration If an input waveform cannot fit within one of the 16 bit ranges shown above or requires much higher accuracy then a 32 bit range should be considered Range Hz 15u 100 150u 1k 1 5m 10k Frequency Ranges for a 32 bit Val
48. bVIEW DASYLab and MATLAB DaqCOM provides Windows basedActiveX COM based programming tools for Microsoft VisualStudio and VisualStudio NET Also included with the 3000 Series is new DaqView software a comprehensive Out of the Box application that enables set up data logging and real time data viewing without existing programming skills Optional DaqView Pro also adds features such as direct to Excel enhancements FFT analysis statistics etc DaqView software provides Out of the Box quick and easy set up and collection of data Daq devices have software options capable of handling most applications Three types of software are available e ready to use graphical programs e g DaqView DaqViewXL and post acquisition data analysis programs such as PostView DIAdem and eZ PostView e drivers for third party icon driven software such as DASYLab and LabView e various language drivers to aid custom programming using API Ready to use programs are convenient for fill in the blank applications that do not require programming for basic data acquisition and display e DaqView is a Windows based program for basic set up and data acquisition DaqView lets you select desired channels gains transducer types including thermocouples and a host of other parameters with a click of a PC s mouse DaqView lets you stream data to disk and display data in numerical or graphical formats PostView is a post acquisition wavefor
49. ble Analog Input The Personal Daq 3000 series has a 16 bit 1 MHz A D coupled with 16 single ended or 8 differential analog inputs Seven software programmable ranges provide inputs from 10V to 100 mV full scale Each channel can be software configured for a different range as well as for single ended or differential bipolar input Each differential channel can accept any type of thermocouple input Synchronous I O The Personal Daq 3000 series has the ability to make analog measurements and scan digital and counter inputs while synchronously generating up to four analog outputs Additionally while digital inputs and counter inputs can be synchronously scanned along with analog inputs they do not affect the overall A D rate because they use no time slot in the scanning sequencer For example one analog input can be scanned at the full 1 MHz A D rate along with digital and counter input channels The 1 MHz A D rate is unaffected by the additional digital and counter channels Input Scanning Personal Daq 3000 Series devices have several scanning modes to address a wide variety of applications A 512 location scan buffer can be loaded by the user with any combination of analog input channels All analog input channels in the scan buffer are measured sequentially at 1 usec per channel The user can also specify that the sequence repeat immediately or repeat after a programmable delay from 0 to 19 hours with 20 83 nsec resolution For exa
50. bled but holds the count value The mapped channel can be any other input channel PULSEWIDTH OPT6 This allows the mapped channel s pulsewidth to be measured instead of the input channel The mapped channel can be any other input channel post debounce This option allows the counter to be used with any other input channel post debounce If the channel s input is used elsewhere for example gating another counter the counter for this channel does not need to go unused Pulsewidth and Timing mode Accuracy Personal Daq 3000 Series modules have the ability to measure the pulsewidth of an input and the time between any two edges on any two inputs The time ranges are similar to those shown for period mode except that averaging is not available The ranges given below reflect this Upper 16 bits of the 32 bit Counter Lower 16 bits of the 32 bit Counter Range S Ticksize nS Averaging Range S Ticksize nS Averaging Option Option 800 80000 20833 333 20833 333 1 80 8000 2083 333 1m 100m 2083 333 8 800 208 333 100u 10m 208 333 800m 80 20 833 20 833 Pulsewidth and Time Ranges for a 16 bit Value Sampling error is less than 0 21 Full 32 bit Counter Range S Ticksize nS Averaging Option 10m 80000 20833 333 1 1m 8000 2083 333 100u 800 208 333 10u 80 20 833 Pulsewidth and Time Ranges for a 32 bit Value Sampling error is less than 0 21 Full 32 bit Counter lt 10 ppm F
51. bsolute error is the root sum of squares of the two independent error sources Many times the desired accuracy 1s much less than what the internal timebase is capable of Other applications will require a more accurate period measurement and the effects of sampling error will have to be averaged out leaving only the inaccuracy associated with the internal ttmebase Inaccuracy due to the internal timebase cannot be averaged out For period and frequency measurements percent sampling error is equal to 100 n 1 where n 0 to 65 535 for a 16 bit counter and n 0 to 4 294 967 295 for a 32 bit counter For small count values the sampling error is large and for large count values the sampling error is small If sampling error is to be less than 0 21 n must be greater than 480 regardless of counter size Sampling error can also be reduced by averaging many samples together Assuming the input signal 1s asynchronous to the module s internal timebase sampling error can be divided by the square root of the number of samples taken The averaging can be done with PC based software The device has the ability to measure 1 10 100 or 1000 periods dividing the sampling error by 1 10 100 or 1000 This is done within the Personal Daq 3000 Series circuitry and may eliminate the need for any averaging to be done in the PC For high accuracy on high frequency inputs multiple period measurement and PC based averaging can be done 3000 Series devices h
52. careful to avoid loading down the digital outputs or DAC outputs too heavily gt 1 mA Heavy load down will cause significant heat generation inside the unit and increase the CJC thermistor error A 4 Signal Modes and System Noise 937492 Appendix A System Noise Averaging Laboratory and industrial environments often have multiple sources of electrical noise An AC power line is a source of 50 60 Hz noise Heavy equipment air conditioners elevators pumps etc can be a source of noise particularly when turned on and off Local radio stations are a source of high frequency noise and computers and other electronic equipment can create noise in a multitude of frequency ranges Thus an absolute noise free environment for data acquisition is not realistic Fortunately noise reduction techniques such as averaging filtering differential voltage measurement and shielding are available to reduce noise to an acceptable level Certain acquisition programs apply averaging after several samples have been collected Depending on the nature of the noise averaging can reduce noise by the square root of the number of averaged samples Although averaging can be effective it suffers from several drawbacks Noise in measurements only decreases as the square root of the number of measurements reducing RMS noise significantly may require many samples Thus averaging is suited to low speed applications that can provide many samples Note Only ran
53. ch products carry the CE marker indicating they comply with the safety and emissions standards of the European Community As applicable we ship these products with a Declaration of Conformity stating which specifications and operating conditions apply Cautions Notes and Tips Refer all service to qualified personnel This caution symbol warns of possible personal injury or equipment damage under noted conditions Follow all safety standards of professional practice and the recommendations in this manual Using this equipment in ways other than described in this manual can present serious safety hazards or cause equipment damage This warning symbol is used in this manual or on the equipment to warn of possible injury or death from electrical shock under noted conditions This ESD caution symbol urges proper handling of equipment or components sensitive to damage from electrostatic discharge Proper handling guidelines include the use of grounded anti static mats and wrist straps ESD protective bags and cartons and related procedures This symbol indicates the message is important but is not of a Warning or Caution category These notes can be of great benefit to the user and should be read In this manual the book symbol always precedes the words Reference Note This type of note identifies the location of additional information that may prove helpful References may be made to other chapters or other documentation Tips provide adv
54. common and voltage source V2 is connected to Channel 8 and analog common The figure also shows voltage V3 resulting from a thermocouple In this case differential mode is being used The high line from the thermocouple is shown connected to Channel HI and the low negative side is connected to Channel 1 LO Notice that Channel 1 LO uses the same screw terminal connection as CH 9 In Personal Daq 3000 Series and PDQ30 applications thermocouples should only be connected in differential mode Connecting thermocouples in single ended mode can cause noise and false readings Thermocouple wires are to be connected in differential mode only Differential connection is made as follows a the red thermocouple wire connects to the channel s Low L connector b the other color wire connects to the channel s High H connector Analog Common CHO CHORHI CH8 CHOLO Analog Common CH 1 CH 1H CHS CHTLO Analog Common CH2 CH ZHI CH 107 CH 2 LO Analog Common CH3 CH SHI CHIT CHS3LO TB2 Single Ended V1 and V2 and Differential V3 Connections to Analog Input Channels Reference Note Appendix A Signal Modes and System Noise contains additional information Personal Daq 3000 Series User s Manual 888594 Connections amp Pinouts 2 5 Note 2 6 Connections amp Pinouts 888594 Personal Daq 3000 Series User s Manual CE Compliance 3 Overview ce Overview 3 1 CE Standards and Directives
55. definitions are provided as an aid to understanding counter modes Gating Any counter can be gated by the mapped channel When the mapped channel is high the counter will be allowed to count when the mapped channel is low the counter will not count but hold its value Mapped Channel A mapped channel is one of 4 signals that can get multiplexed into a channel s counter module The mapped channel can participate with the channel s input signal by gating the counter clearing the counter etc The 4 possible choices for the mapped channel are the 4 input signals post debounce Start of Scan The start of scan is a signal that is internal to the 3000 Series module It signals the start of a scan group and therefore pulses once every scan period It can be used to clear the counters and latch the counter value into the acquisition stream Terminal Count This signal is generated by the counter value There are only two possible values for the terminal count 65 535 for a 16 bit counter Counter Low and 4 294 967 295 for a 32 bit counter Counter High The terminal count can be used to stop the counter from rolling over to zero Ticksize The ticksize is a fundamental unit of time and has four possible settings 20 83ns 208 3ns 2083ns 20833ns For measurements that require a timebase reference like period or pulsewidth the ticksize is the basic unit of time Ticksize is derived from the period of the 48 MHz system clock The count value
56. detailed information view the PDF documentation located on CD at our website or in the Programs Group which resides on your PC after software installation 324400D 01 lOtech 25971 Cannon Rd Cleveland OH 44146 1833 phone 440 439 4091 e mail productsupport iotech com www iotech com Printed in Hungary Device Overviews 1 Block Diagrams 1 1 Connections 1 2 Product Features 1 3 Software 1 15 Reference Note Programming topics are covered in the Programmer s User Manual p n 1008 0901 As a part of product support this manual is automatically loaded onto your hard drive during software installation The default location is the Programs group which can be accessed through the Windows Desktop Reference Note For module details refer to Chapter 7 Specifications Block Diagrams 16 Bil Digital o nalog Converters Mode 1 i Tez 8 DE 16 SE Programmable Analog Input Gain Ampliar 1B We 5 Analog to Dagital A Con ener 16 Analog Channel lngul Prolaction One TTL Trigger Input One 12 Step Analog Input Pacer Chock L Ea Random Access Channel Gain Sequencer I AA Suara FIFO Sequencer Fase TBE I l Two 16 Bit Timer Outputs a w Pinograrnma bka Sequencer Terral teas Fi THa te 18 hours age d Three Bil Dipta WO Pois i syle i USE ee Four 32 Bi Counter Inpu
57. dom noise is reduced or eliminated by averaging Averaging does not reduce or eliminate periodic signals Refer to the section Oversampling and Line Cycle Rejection page A 6 Analog Filtering A filter is an analog circuit element that attenuates an incoming signal according to its frequency A low pass filter attenuates frequencies above the cutoff frequency Conversely a high pass filter attenuates frequencies below the cutoff As frequency increases beyond the cutoff point the attenuation of a single pole low pass filter increases slowly Multi pole filters provide greater attenuation beyond the cutoff frequency but may introduce phase time delay problems that could affect some applications Input and Source Impedance Crosstalk Appendix A As illustrated in the following figure input impedance R of a measurement system combines with the transducer s source impedance R forming a voltage divider This divider distorts the voltage being read The actual voltage read is represented by the equation V apc Vr X R R R Measurement 4 system With input impedance R of 10 MQ which is a realistic value for many measurement systems a low source impedance R of less than 100Q usually presents no problem Signals from sources with impedance greater than 100 should have appropriate signal conditioning Crosstalk is a type of noise related to source impedance and capacitance in which signals from one channel leak int
58. e Overviews 988093 Personal Daq 3000 Series User s Manual Product Features Personal Daq 3001 16SE 8DE m Personal Daq 3005 16SE 8DE zZz ol Personal Daq 3000 64SE 32DE 7 with PDQ30 Personal Daq 3001 64SE 32DE with PDQ30 Personal Daq 3005 64SE 32DE with PDQ30 The Personal Daq 3000 Series modules feature a 16 bit I MHz A D converter 16 analog input channels user expandable up to 64 up to four 16 bit 1 MHz analog outputs 24 high speed digital I O channels 2 timer outputs and four 32 bit counters All analog I O digital I O and counter timer I O can operate synchronously and simultaneously guaranteeing deterministic I O timing amongst all signal types The Personal Daq 3000 Series modules include a high speed low latency highly deterministic control output mode that operates independent of the PC In this mode both digital and analog outputs can respond to analog digital and counter inputs as fast as 2usec Other Hardware Features Include o Encoder measurements up to 20 MHz including Z channel zeroing o Frequency and Pulse width measurements with 20 83 nsec resolution o Timing mode can measure the time between two counter inputs to 20 83 nsec resolution o Self calibration The Personal Daq 3000 series offers up to 4 MHz scanning of all digital input lines Digital inputs and counter inputs can be synchronously scanned along with analog inputs but do not affect the overall A D rate because they us
59. e no time slot in the scanning sequencer For example one analog input can be scanned at the full 1 MHz A D rate along with digital and counter input channels The 1 MHz A D rate is unaffected by additional digital and counter channels Adding analog input channels to a Personal Daq 3000 Series module is easy An additional 48 single ended or 24 differential analog input channels can be added to each module with the optional PDQ30 expansion module The PDQ30 connects to the Personal Daq 3000 series card via an external cable With the Personal Daq 3000 s 1 MHz aggregate sample rate users can easily add multiple analog expansion channels and still have enough bandwidth to have a per channel sample rate in the multiple kHz range Although the Personal Daq 3000 Series modules are powered via a USB port on a host PC an external power connector is available for cases in which the host PC s USB port cannot supply adequate power or for when the user prefers a separate power source The TR 2 is an optional power supply available for this purpose The TR 2 plugs into a standard 120VAC outlet and will supply 9VDC 1 amp power to the module via its external power connector Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 3 Signal I O Six banks of removable screw terminal blocks provide connectivity to the 16SE 8DE analog input channels 24 digital I O lines counter timer channels and analog outputs when applica
60. e or decrement the counter 2 Period Mode Options Measure x1 x10 x100 or x1000 periods 16 bit or 32 bit 4 time bases to choose from 20 83 ns 208 3 ns 2 083 us 20 83 us any other channel can gate the period measurement 3 Pulsewidth Mode Options 16 bit or 32 bit values 4 time bases to choose from 20 83 ns 208 3 ns 2 083 us 20 83 us any other channel can gate the pulsewidth measurement 4 Timing Mode Options 16 bit or 32 bit values 4 time bases to choose from 20 83 ns 208 3 ns 2 083 us 20 83 us 5 Encoder Mode Options x1 x2 x4 options 16 bit or 32 bit values Z channel clearing of the counter any other channel can gate the counter Multi axis Quadrature Encoder Inputs o 1channel with A phase B phase and Z index o 2channel with A phase and B phase o X1 x2 and x4 count modes o Single ended TTL Note Specifications are subject to change without notice 937492 Specifications 7 9 Frequency Pulse Generators 3 3V Terminal Block Timer Generator 100 Q One Timer Channel Typical Channels 2 x 16 bit Output Waveform Square wave Output Rate 1 MHz base rate divided by 1 to 65535 programmable High Level Output Voltage 2 0V minimum 1 0 mA 2 9V minimum 400 pA Low Level Output Voltage 0 4V maximum 400 pA Software DaqViewXL Plus DaqView add on for seamless execution with Microsoft Excel s tool palette DaqView Pro DaqView add on includes all of the features of D
61. ed on acquisition data O P2C digital output port with a data byte and mask byte O analog outputs DACs O timers The detection module looks at the 16 bit data being returned on a given channel and generates another signal for each channel with a setpoint applied Detect1 for Channel 1 Detect2 for Channel 2 etc These signals serve as data markers for each channel s data It doesn t matter whether that data is volts counts period pulsewidth timing or encoder position A channel s detect signal will show a rising edge and will be True 1 when the channel s data meets the setpoint criteria The detect signal will show a falling edge and will be False 0 when the channel s data does not meet the setpoint criteria The true and false states for each setpoint criteria appear in the Setpoint Status Register see page 6 11 Personal Daq 3000 Series User s Manual 887894 Setpoint Configuration for Output Control 6 1 Detect Rising Edge Detect Falling Edge Condition True Condition False None E Channel Update P2C SI Update DAC input Update Timer Condition Action Criteria Action Input Signal is Equal to X Driven by Condition LimitA or e EqualtoA True Only Limit B e BelowA Choose 1 If True then Output Value 1 If False then perform no action Above B True and False If True then Output Value 1 If False then Output Value 2 Window Inside True Only non Outside B gt X orxX gt A If True then
62. eginning of each channel s us time block lt Start of Scan Start of Scan 3 P2C Example of P2C or DAC Latency If we apply a setpoint on analog input Channel 2 then that setpoint will get evaluated every 10us with respect to the sampled data for Channel 2 Due to the pipelined architecture of the Analog to Digital Converter system the setpoint cannot be evaluated until 2us after the ADC conversion In the example above the P2C digital output port can be updated no sooner than 2us after Channel 2 has been sampled or 3us after the start of the scan This 2us delay is due to the pipelined ADC architecture The setpoint is evaluated 2us after the ADC conversion and then P2C can be updated immediately P2C digital outputs can be updated immediately upon setpoint detection This is not the case for analog outputs as these incur another 3us delay This is due to the shifting of the digital data out to the D A converter which takes lus plus the actual conversion time of the D A converter 1 e another 2us worst case Going back to the above example if the setpoint for analog input Channel 2 required a DAC update it would occur 5us after the ADC conversion for Channel 2 or 6us after the start of the scan When using setpoints to control any of the DAC outputs increased latencies may occur if attempting to stream data to DACs or pattern digital output at the same time The increased latency can be as long as the period o
63. el in the scan list Personal Daq 3000 Series User s Manual 887894 Setpoint Configuration for Output Control 6 11 Note 6 12 Setpoint Configuration for Output Control 887894 Personal Daq 3000 Series User s Manual Specifications Personal Daq 3000 Series and PDQ30 Personal Daq 3000 Series Specifications Personal Daq 3000 16SE 8DE 24 4 Personal Daq 3001 _16SE 8DE Personal Daq 3005 16SE 8DE 2 2 2 Personal Daq 3000 64SE 32DE 7 2 24 4 2 with PDQ30 Personal Daq 3001 64SE 32DE 7 4 24 4 2 with PDQ30 Personal Daq 3005 64SE 32DE 7 with PDQ30 General Specifications Power Consumption Modei Power Consumption Typical The power consumption listed is for a single Personal Daq 3000 Series device or for a single device connected to a PDQ30 expansion module An optional power adapter TR 2 will be required if the USB port cannot supply adequate power USB2 ports are by USB2 standards required to supply 2500 mW nominal at 5V 500 mA Environment Operating Temperature 30 to 70 C Storage Temperature 40 to 80 C Relative Humidity 0 to 95 non condensing Communications USB2 0 high speed mode 480 Mbps if available otherwise USB1 1 full speed mode 12 Mbps Acquisition Data Buffer 1 MSample Vibration MIL STD 810E Category 1 and 10 Signal I O Connector 6 banks of removable screw terminal blocks External Power Connector Switchcraft RAPC 712 Power
64. f differential mode 2 2 Connections amp Pinouts 888594 Personal Daq 3000 Series User s Manual PDQ30 Analog Expansion Option PDQ30 is an optional analog expansion module that when connected to a Personal Daq 3000 series device adds an additional 48 analog inputs Refer to PDQ30 specifications sheet for channel input specifications Personal Daq 3000 Series modules can connect to a PDQ30 directly via DB25 connector or indirectly via a CA 96A cable When connected directly 1 e DB25 to DB25 two small clips included are used to hold the modules together CA 1 79 8 w LSB Cable Back View Direct Connection of Personal Dagq 3000 and PDQ30 USB2 0 Port CA 17 USE Cable Connection of Personal Dag 3000 and PDQ30 via a CA 96A Expansion Cable PDQ30 is not to be connected to a live device Turn off power to the host PC and externally connected equipment prior to connecting cables or signal lines Electric shock or damage to equipment can result even under low voltage conditions Take ESD precautions packaging proper handling grounded wrist strap etc Ensure modules do not come into contact with foreign elements such as oils water and industrial particulate 1 Ensure power is removed from all device s to be connected 2 Observe ESD precautions when handling the module and making connections 3 PDQ30 s DB25 connector connects to a Personal Daq 3000 Series module DB25 connector either direc
65. f the DAC pacer clock For these reasons avoid streaming outputs on any DAC or pattern digital output when using setpoints to control DACs 6 6 Setpoint Configuration for Output Control 887894 Personal Daq 3000 Series User s Manual More Examples of Control Outputs Detection on an Analog Input DAC and P2C Updates Update Mode Update on True and False Criteria Ch 5 example Below Limit Ch 4 example Inside Window In this example Channel 5 has been programmed with reference to one setpoint Limit A defining a low limit and Channel 4 has been programmed with reference to two setpoints Limits A and B which define a window for that channel Channel Condition State of Action Detect Signal Below Limit A True When Channel 5 analog input voltage is below the limit A for Channel 5 update DAC1 with Output Value 0 0V False When the above stated condition is false update DAC1 with the Output Value of minus 1 0V Within Window True When Channel 4 analog input voltage is within the window Between Limit A update P2C with 70h and Limit B for Channel 4 False When the above stated condition is false Channel 4 analog input voltage is outside the window fies P2C with 30h 6 Analog Input Voltage 4 Limit A 2 for Channel 5 DAC1 OOV 1 1 0V 0V 1 0 OO 1 0 00V 1 0 OV n lt lt Waianae es a a es eee 5276 Detection ae i i 1 0 for Channel 5 Limit A 3527 08 for Channel 4 Lim
66. gger post trigger stop event This the simplest of modes acquires data upon receipt of the trigger and stops acquiring upon receipt of the stop trigger event o Fixed pre trigger with post trigger stop event In this mode the user specifies the number of pre trigger readings to be acquired after which acquisition continues until a stop trigger event occurs o No pre trigger infinite post trigger No pre trigger data is acquired in this mode Instead data is acquired beginning with the trigger event and is terminated when the operator issues a command to halt the acquisition o Fixed pre trigger with infinite post trigger The user specifies the amount of pre trigger data to acquire after which the system continues to acquire data until the program issues a command to halt acquisition o Variable pre trigger with post trigger stop event Unlike the previous pre trigger modes this mode does not have to satisfy the pre trigger number of readings before recognizing the trigger event Thus the number of pre trigger readings acquired is variable and dependent on the time of the trigger event relative to the start In this mode data continues to be acquired until the stop trigger event is detected Driver support only o Variable pre trigger with infinite post trigger This is similar to the mode described above except that the acquisition is terminated upon receipt of a command from the program to halt the acquisition Driver support only
67. h counter Since period measurements always have the stop at the top option enabled this option dictates whether the measurement has a range of 0 to 65535 ticks or 0 to 4 294 967 295 ticks PERIOD OPT4 Allows the mapped channel to gate the counter if desired When the mapped channel is high the counter is enabled When the mapped channel is low the counter is disabled but still holds the count value The mapped channel can be any other input channel PERIOD OPT6 This allows a mapped channel s period to be measured instead of the input channel The mapped channel can be any other input channel post debounce This option allows the counter to be used with any other input channel post debounce If the channel s input is used elsewhere for example gating another counter the counter for this channel does not need to go unused Period and Frequency Accuracy The 3000 Series module can measure the period of any input waveform It does this by counting the integral number of ticks that make up the period the data returned will always be time measured in ticks The error in each data sample will come from two sources the sampling error caused by not being able to count a partial tick and the 3000 Series module s internal timebase inaccuracy The module s internal timebase has an absolute accuracy of 50 ppm The sampling error will vary with input frequency selected ticksize and selected averaging mode The a
68. he mapped channel can be used to latch the counter output The mapped channel can also be used to e gate the counter e increment the counter e decrement the counter The mapped channel can be any of the 4 counter input channels post debounce or any of the four asynchronous read strobes When a counter is not in the scan it can be asynchronously read with or without clear on read The asynchronous read signals strobe when the lower 16 bits of the counter are read by software The software can read the counter s high 16 bits at a later time after reading the lower 16 bits The full 32 bit result reflects the timing of the first asynchronous read strobe OPT1 aS ey Gate Low Word Channel Input OP 14 High Word Fost Debounce 32 Bit S D Increment Counter 32 Bits Decrement OETA To PC Buffer Start of Scan Signal 4 Channel Inputs Post Debounce 4 Asynchronous gt Mapped Channel Read Strobes OPT3 Counter Totalize Mode There is one asynchronous read strobe for each of the four counter channels 5 6 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual An explanation of the various counter options depicted in the previous figure follows COUNTER OPTO This selects totalize or clear on read mode Totalize Mode The counter counts up and rolls over on the 16 bit Low Counter boundary or on the 32 bit High Counter boundary See OPT2 in regard to choosing 16 bit
69. he Thermocouple Appendix A 937492 Signal Modes and System Noise A 3 Cold Junction Compensation Techniques The Personal Daq 3000 can measure up to 8 channels of temperature and the PDQ30 can measure up to 24 channels of temperature Both units employ thermistors to measure the junction temperature at the terminal block for each thermocouple connection These thermistors are inside the unit just behind the mating terminal block connector on the internal circuit board The actual junction is outside the unit and therefore there is some amount of error in the thermistor s ability to measure the actual junction temperature Personal Daq 3000 Since the Personal Daq 3000 generates more heat internally there are more thermistors per terminal block than the PDQ30 The PDQ30 generates little heat There are three thermistors per terminal block on the Personal Daq 3000 but only one thermistor per terminal block on the PDQ30 Personal Daq software compensates for the thermal error between the CJC thermistor temperature and the actual junction temperature at the terminal block The units are profiled under controlled conditions still air 25C 60 minute warm up lying on a flat surface and the thermal error is measured on a per channel basis This is done for the Personal Daq 3000 and the PDQ30 The per channel CJC temperature offsets are then stored inside the unit in non volatile memory along with the calibration constants 9 Ti
70. he main channels PDQ30 can connect directly to a 3000 Series module s DB25 connector or connect via a CA 96 cable DB25 male to DB25 female cable links Personal Daq 3000 Series device to PDQ30 2 ft USB cable 1 m USB cable 3 m USB cable 5 m Removable screw terminal block 1 block 12 connections External power supply 120VAC to 9VDC 1A 937492 Note Specifications are subject to change without notice Appendix A Signal Modes and System Noise Signal Modes A 1 Connecting Thermocouples to Screw Terminal Blocks A 2 Shielding A 3 TC Common Mode A 3 Cold Junction Compensation Techniques A 4 System Noise A 5 Averaging A 5 Analog Filtering A 5 Input and Source Impedance A 5 Crosstalk A 5 Oversampling and Line Cycle Rejection A 6 Signal Modes Appendix A Personal Daq 3000 units can make use of single ended mode or differential modes Mode selection is made in software Single ended mode refers to a mode or circuit set up in which a voltage is measured between 1 signal line and common ground voltage Analog Common or Acom The measured voltage may be shared with other channels The advantage of a single ended non differential mode over differential mode 1s that it provides for a higher channel count for example 16 channels instead of 8 In Personal Daq 3000 applications thermocouples should never be connected single ended Doing s
71. he scan is programmed pre acquisition and is made up of 6 analog channels Ch0 Ch2 Ch5 Chl 1 Ch22 Ch25 and 4 digital channels 16 bits of digital input 3 counter inputs Each of the analog channels can have a different gain and each of the counter channels can be put into a different mode totalizing pulsewidth encoder etc The acquisition is triggered and the samples stream to the PC via USB2 Each analog channel requires one microsecond of scan time therefore the scan period can be no shorter than 6 us for this example All of the digital channels are sampled at the start of scan and do not require additional scanning bandwidth as long as there is at least one analog channel in the scan group The 16 bits of digital input are sampled for every analog sample in the scan group This allows up to 1MHz digital input sampling while the 1MHz analog sampling bandwidth is ageregated across many analog input channels The scan period can be made much longer than 6 us up to 19 hours The maximum scan frequency is one divided by 6us or 166 666 Hz Note that digital input channel sampling is not done during the dead time of the scan period where no analog sampling is being done either Start of Scan Start of Scan Start of Scan Start of Scan JE o 2 s 11 22 25 Dpjo ojpjo D o 2 s 11 22 25 al h Scan Period If the 3 counter channels are all returning 32 bit values and the digital input channel is returning a 16 bit
72. hrough the use of an external temperature calibrator A temperature calibrator is a temperature simulation instrument that allows selection of thermocouple type and temperature For proper operation it must be connected to the Personal Daq 3000 Series module with the same type thermocouple wire and connector that is used in normal testing The calibrator then generates and supplies a voltage corresponding to that which would be generated by the TC type at the associated temperature The temperature selected on the calibrator will be dictated by the nature of normal testing 0 C is usually the best choice Calibrators are the most accurate at this setting and the connecting thermocouple wire will contribute very little error at this temperature However if the dynamic range of the normal testing 1s for example 100 C to 300 C a selection of 200 C may give better results In either case the level of adjustment is determined by comparing the unit reading to the selected calibrator temperature For example if the calibrator is set to 0 C output and the Personal Daq 3000 Series module reads 0 3 C then an adjustment of minus 0 3 C is required That is the adjustment value is determined by subtracting the Personal Daq module s reading from the calibrator setting To implement the adjustment in DaqView 1 Ensure that the acquisition process is turned off 2 Click on the cell in the Units column for the channel that is connected to the ca
73. ice that may save time during a procedure or help to clarify an issue Tips may include additional reference Specifications and Calibration Specifications are subject to change without notice Significant changes will be addressed in an addendum or revision to the manual As applicable IOtech calibrates its hardware to published specifications Periodic hardware calibration is not covered under the warranty and must be performed by qualified personnel as specified in this manual Improper calibration procedures may void the warranty Quality Notice IOtech has been an ISO 9001 registered firm since 1996 Prior to shipment we thoroughly test our products and review our documentation to assure the highest quality in all aspects In a spirit of continuous improvement IOtech welcomes your suggestions iii Your order was carefully inspected prior to shipment When you receive your system carefully unpack all items from the shipping carton and check for physical signs of damage that may have occurred during shipment Promptly report any damage to the shipping agent and your sales representative Retain all shipping materials in case the unit needs returned to the factory Note Using this equipment in ways other than described in this manual can cause personal injury or equipment damage Before setting up and using your equipment you should read all documentation that covers your system Pay special attention to Warnings and Cautions
74. is mode can also be done with P2C digital output port or a timer output instead of a DAC Ch 3 Analog Input Voltage Limit A Limit B Detection DACO Channel 3 in Hysterisis Mode Personal Daq 3000 Series User s Manual 887894 Setpoint Configuration for Output Control 6 9 Using Multiple Inputs to Control One DAC Output Update Mode Rising Edge for each of 2 channels Criteria Used Inside Window for each of 2 channels The figure below shows how multiple inputs can update one output In the following figure the DAC2 analog output is being updated Analog input Channel 3 has an inside the window setpoint applied Whenever Channel 3 s input goes inside the programmed window DAC2 will be updated with 3 0V Analog input Channel 7 also has an inside the window setpoint applied Whenever Channel 7 s input goes inside the programmed window DAC2 will be updated with minus 7 0V Limit A for Ch3 Limit B for Ch3 Limit A for Ch7 Limit B for Ch7 Detection Ch3 Detection Ch7 Start of Acquisition 3 0 V Denotes DAC update DAC2 0 0 V 7 0 V Using Two Criteria to Control an Output The update on True Only mode was selected and therefore the updates for DAC2 will only occur when the criteria is met However in the above figure we see that there are 2 setpoints acting on one DAC We can also see that the channe s two criteria can be met during the same scan When both channel criteria from
75. is outside of the window a value of 10h in the example and a second value is output on P2C when the position 1s inside the window a value of 20h in the example In the True and False mode each setpoint has two update values One of the two values is used to update the output target DAC P2C or timer when the input channel meets the setpoint criteria The second value is used to update the same target when the condition is false By software default P2C comes up as a digital input If you want the P2C signal to be a digital output in some initial state before an acquisition is started and P2C is to be updated by set point criterion then you must do an asynchronous write to P2C before the acquisition is started The initial value will only be output if the asynchronous write to P2C has been performed Personal Daq 3000 Series User s Manual 887894 Setpoint Configuration for Output Control 6 5 P2C DAC or Timer Update Latency Setpoints allow DACs timers or P2C digital outputs to be updated very quickly Exactly how fast an output can be updated is determined by the following three factors o scan rate o synchronous sampling mode o type of output to be updated Example We set an acquisition to have a scan rate of 100 kHz This means each scan period is 10us Within the scan period we will sample six analog input channels These are shown in the following figure as Channels through 6 The ADC conversion occurs at the b
76. it B for Channel 4 P2C Detection Signal for Channel 4 Analog Inputs with Setpoints Update on True and False Personal Daq 3000 Series User s Manual 887894 Setpoint Configuration for Output Control 6 7 In the example upper portion of the preceding figure the setpoint placed on analog Channel 5 updated DAC1 with 0 0V The update occurred when Channel 5 s input was less than the setpoint Limit A When the value of Channel 5 s input was above setpoint Limit A the condition of lt A was false and DAC1 was then updated with minus1 0V Control outputs can be programmed on each setpoint Detection for Channel 4 could be used to update the P2C digital output port with one value 70h in the example when the analog input voltage is within the shaded region and a different value when the analog input voltage is outside the shaded region 30h in the example Detection on an Analog Input Timer Output Updates Update Mode Update on True and False Criteria Used Inside Window The figure below shows how a setpoint can be used to update a timer output Channel 23 is an analog input channel It could be any analog input channel but in this example it happens to be on a PDQ30 expansion module A setpoint is applied using Update on True and False with a criteria of inside the window where the signal value is inside the window when simultaneously less than Limit A but greater than Limit B Whenever the Channel 23 analog input
77. k o The amplitude of the driving waveform should be as high as possible without violating the over voltage specification o To ensure adequate switching waveforms should swing at least OV to 5V and have a high slew rate Each channel s output can be debounced with 16 programmable debounce times from 500 ns to 25 5 ms The debounce circuitry eliminates switch induced transients typically associated with electro mechanical devices including relays proximity switches and encoders From the following illustration we can see that there are two debounce modes as well as a debounce bypass In addition the signal from the buffer can be inverted before it enters the debounce circuitry The inverter is used to make the input rising edge or falling edge sensitive Edge selection is available with or without debounce In this case the debounce time setting 1s ignored and the input signal goes straight from the inverter or inverter bypass to the counter module There are 16 different debounce times In either debounce mode the debounce time selected determines how fast the signal can change and still be recognized The two debounce modes are trigger after stable and trigger before stable A discussion of the two modes follows Inverter Bypass From Terminal Block Connectors To Counters Trigger After Stable Debounce Model Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 1 Trigger Afte
78. l to Limit A mode only be used with counter or digital input channels as the channel source If similar functionality is desired for analog channels then the Inside Window mode should be used Personal Daq 3000 Series User s Manual 887894 Setpoint Configuration for Output Control 6 3 Controlling Analog Digital and Timer Outputs Each setpoint can be programmed with an 8 bit digital output byte and corresponding 8 bit mask byte When the setpoint criteria has been met the P2C digital output port can be updated with the given byte and mask Alternately each setpoint can be programmed with a 16 bit DAC update value any one of the 4 DAC outputs can be updated in real time Any setpoint can also be programmed with a timer update value In hysteresis mode each setpoint has two forced update values Both update values can drive the same output target 1 e DAC timer or P2C digital output port In hysteresis mode the outputs do not change when the input values are inside the window There is one update value that gets applied when the input values are less than the window and a different update value that gets applied when the input values are greater than the window Update on True and False uses two update values There is one update value that gets applied when the specified criteria is met True and a different update value that gets applied when the specified criteria is not met False The update values can drive DACs P2C or
79. lags B ae Counter 22 Bits 32 Bits GTR CTR3 gt oe as 2x 4x ecremen Select OPT2 w pe uffer OPT 1 0 Clear Latch _ OPTS 4 Channel Inputs i Post Debounce gt oer ar acan vgra 4 Asynchronous i Mapped Channel Read Strobes OPT3 Encoder Mode There is one asynchronous read strobe for each of the four counter channels 5 16 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual ENCODER OPT 1 0 This determines the encoder measurement mode 1X 2X or 4X ENCODER OPT3 This determines which signal latches the counter outputs into the data stream going back to the 3000 Series device Normally the start of scan signal latches the counter outputs at the beginning of every scan The other option is to have the mapped signal latch the counter outputs This allows the user to have another signal control the latching of the count data so the exact value of the counter is known when an edge is present on another channel ENCODER OPT4 This allows the mapped channel to gate the counter if desired When the mapped channel is high the counter is enabled to count when the mapped channel is low the counter is disabled but holds the count value The mapped channel can be any other input channel ENCODER OPTS5 This allows the mapped channel to clear the counter if desired OPTS implements the Z function described above allowing the encoder reference to clear the counter The counter is cleared o
80. librator The engineering units pull down menu above the grid becomes active 3 Click on the down arrow and select the mx b option This option allows post acquisition mathematical manipulation 4 For the example adjustment enter 0 3 for b The channel under calibration will now read 0 C Note that this adjustment is a mathematical operation only and in no way alters the hardware calibration of the product Moreover it operates on a per channel basis with the settings for a given channel having no influence on any other channels Personal Daq 3000 Series User s Manual 898194 Calibration 4 1 4 2 Calibration 898194 Personal Daq 3000 Series User s Manual Counter Input Modes 5 Debounce Tips for Making High Speed Counter Measurements gt 1 MHz 5 1 Debounce Module 5 1 Terms Applicable to Counter Modes 5 5 Counter Options 5 5 Counter Totalize Mode 5 6 Period Mode 5 8 Pulsewidth Mode 5 11 Timing Mode 5 13 Encoder Mode 5 15 Note Each of the high speed 32 bit counter channels can be configured for counter period pulse width time between edges or encoder modes Tips for Making High Speed Counter Measurements gt 1 MHz o Use coax or twisted pair wire Connect one side to Digital Common o Ifthe frequency source is tolerant parallel terminate the coax or twisted pair with a 50 ohm or 100 ohm resistor at the terminal bloc
81. m display program within DaqView e ViewXL Plus allows you to interface directly with Microsoft Excel to enhance data handling and display Within Excel you have a full featured Daq control panel and all the data display capabilities of Excel e Post acquisition data analysis programs e g PostView DIAdem and eZ PostView typically allow you to view and edit post acquisition data e The Daq Configuration control panel allows for interface configuration testing and troubleshooting Each Daq system comes with an Application Programming Interface API API language drivers include C C and Visual Basic The latest software is a 32 bit version API Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 15 Reference Notes o The software documents for DaqView ViewXL and Post Acquisition Data Analysis are not included as part of the hardcopy manual but are available in PDF version See the PDF Note below o Programming topics are covered in the Programmer s User Manual 1008 0901 As a part of product support this manual is automatically loaded onto your hard drive during software installation The default location is the Programs directory which can be accessed through the Windows Desktop PDF During software installation Adobe PDF versions of user manuals will automatically Note install onto your hard drive as a part of product support The default location is in the Programs group which c
82. m the DaqBoard s input multiplexer charge injection Note that characteristics of the op amp offset voltage bias current etc should be chosen with serious consideration for the signal being measured Personal Daq 3000 and PDQ30 systems do not have a buffer for each analog input channel due to power restrictions Crosstalk is particularly troublesome when measuring high amplitude signals 10V along with low level signals 100mV All temperature measurements are low level signals that use the 100mV range of the Personal Daq If an acquisition s scan group includes both high level signals and low level signals here are some tips on how to reduce the amount of crosstalk e Use as much oversampling as possible e Within the scan group group high level signals together group low level signals together e Place a shorted channel in the scan group between the high level signals and the low level signals The shorted channel should have the same gain as the last high level signal This may allow for a faster scan rate with less oversampling Oversampling and Line Cycle Rejection The Personal Daq 3000 and PDQ30 allow for oversampling and line cycle rejection to be done When the units are put into oversampling mode noise is reduced and ambient 60Hz or 50Hz pick up can be rejected When enabled oversampling is adjustable from 2 to 16384 The more oversampling that is done the less noise present in the readings Line cycle
83. mple in the fastest mode with a 0 delay a single analog channel can be scanned continuously at 1 Msamples s two analog channels can be scanned at 500K samples seach 16 analog input channels can be scanned at 62 5 Ksamples s The digital and counter inputs can be read in several modes First via software the digital inputs or counter inputs can be read asynchronously at anytime before during or after an analog input scan sequence This software mode is not deterministic as to exactly when a digital or counter input is read relative to an analog input channel In either of the two synchronous modes the digital inputs and or counter inputs are read with deterministic time correlation to the analog inputs In the once per scan mode all of the enabled digital inputs and counter inputs are read during the first analog measurement of an analog input scan sequence The advantage of this mode is that the digital and counter inputs do not consume an analog input time slot and therefore do not reduce the available bandwidth for making analog input measurements For example presume all 24 bits of digital input are enabled and all four 32 bit counters are enabled and eight channels of analog inputs are in the scan sequence at full 1 usec channel rate At the beginning of each analog input scan sequence which would be 8 usec in total duration all digital inputs and counter inputs will be measured and sent to the PC during the first usec of the analog sca
84. n sequence Another synchronous mode allows digital inputs to be scanned every time an analog input channel is scanned For example if eight analog inputs are scanned at 1 usec per channel continuously and 24 bits of digital inputs are enabled then the 24 bits of digital inputs will be scanned at 24 bits per 1 usec If counters are enabled in this mode they will be scanned at once per scan in the same manner as in the first example above Note It is not necessary to read counters as often as it is to read digital inputs This is because counters continue to count pulses regardless of whether or not they are being read by the PC 1 4 Daq Systems and Device Overviews 988093 Personal Daq 3000 Series User s Manual Example 1 Analog channel scanning of voltage inputs The figure below shows a simple acquisition The scan is programmed pre acquisition and is made up of 6 analog channels Ch0 Ch2 Ch5 Ch11 Ch22 Ch25 Each of these analog channels can have a different gain The acquisition is triggered and the samples stream to the PC via USB2 Each analog channel requires one microsecond of scan time therefore the scan period can be no shorter than 6 us for this example The scan period can be made much longer than 6 us up to 19 hours The maximum scan frequency is one divided by 6us or 166 666 Hz Start of Scan Start of Scan Start of Scan Start of Scan o 2 s 11 22 25 0 2 5 11 22 25 0 25 11 22 25 ad Scan Period
85. n setpoint stepped over since the scan period was too long Even though the counter value stepped into and out of the detection window the actual values going back to the PC may not This is true no matter what mode the counter channel is in 6 4 Setpoint Configuration for Output Control 887894 Personal Daq 3000 Series User s Manual The setting of a detection window must be done with a scan period in mind This applies to analog inputs and counter inputs Quickly changing analog input voltages can step over a setpoint window if not sampled often enough There are three possible solutions for overcoming this problem 1 The scan period could be shortened to give more timing resolution on the counter values or analog values 2 The setpoint window can be widened by increasing Limit A and or lowering Limit B 3 A combination of both solutions 1 and 2 could be made Example Setpoint Detection on a Counter in Encoder Mode 65535 Limit A Limit B Encoder Position O P2C 10h 20h 10h 20h 10h Example of a Counter in Encoder Mode The figure above shows values pertaining to a Counter in Encoder Mode The acquisition is started and 16 bit data from the counter streams into the PC at the scan rate The 16 bit counter data is interpreted as the position from an encoder which is connected to the counter inputs The update on True and False mode is being used Thus one value is output on P2C when the position
86. n the rising edge of the mapped channel Encoder Wiring Diagrams You can use up to two encoders with each 3000 Series device in your acquisition system Each A and B signal can be made as a single ended connection with respect to common ground Encoder wiring diagrams and example setup tables are included in the following pages refer to them as needed For Single ended Connections For single ended applications the connections made from the encoder to the 3000 Series device are as follows e Signals A B and Z connect to the Counter Inputs on the Personal Daq 3000 Series device e Each encoder ground connects to GND Differential applications are not supported counter input terminal blocks A pullup resistor can be placed between any input channel and the Q For Open Collector Outputs External pullup resistors can be connected to the 3000 Series encoder power supply Choose a pullup resistor value based on the encoder s output drive capability and the input impedance of the 3000 Series module Lower values of pullup resistors will cause less distortion but also cause the encoder s output driver to pull down with more current Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 17 Wiring for 1 Encoder The following figure illustrates connections for one encoder to a Personal Daq 3000 module The A signal must be connected to an even numbered channel and the associated B signal must be c
87. nnels Channels ON Channels OFF Reading To configure channels make the desired changes in the Channel Setup window This window displays the analog and scanned digital input channels and allows you to configure for example you can change a channel from bipolar to unipolar and can change its units To configure acquisition parameters select the second tab below numbers 4 amp 5 in the above figure This displays the Acquisition Setup window which you can use to set triggering and configure the scan The settings will be used when an acquisition is started To assign a filename and folder select the third tab below numbers 6 amp 7 in the above figure This displays the Data Destination window which provides a means of designating the desired file names file formats and the directory for saving the acquired data To collect data Click the lt Enable Readings Column gt button 17 or the lt Start All Indicators button gt 5 the data acquisition begins and the readings column becomes active Click the lt Acquire gt button 12 to send the data to disk Click one of the toolbar s display icon buttons to see your data in the form of a scope or meter display Click the lt Scope gt button 1 to bring up the Scope window This allows you to set up scope and chart displays Buttons 2 3 and 4 are for bar graph meters analog meters and digital meters Note that you can simultaneously view combinations of display types Note For
88. o an adjacent channel resulting in interference or signal distortion The impact of source impedance and stray capacitance can be estimated by using the following equation T RC Where T is the time constant R is the source impedance and C is the stray capacitance High source transducer impedance can be a problem in multiplexed A D systems When using more than channel the channel input signals are multiplexed into the A D The multiplexer samples one channel and then switches to the next channel A high impedance input interacts with the multiplexer s stray capacitance and causes crosstalk and inaccuracies in the A D sample 937492 Signal Modes and System Noise A 5 A solution to high source impedance in relation to multiplexers involves the use of buffers The term buffer has several meanings but in this case buffer refers to an operational amplifier having high input impedance but very low output impedance Placing such a buffer on each channel between the transducer and the multiplexer prevents the multiplexer s stray capacitance from combining with the high input impedance This use of a buffer also stops transient signals from propagating backwards from the multiplexer to the transducer 15V 9 An example of a buffer is illustrated by the simple op amp schematic at the right The op amp should have a bandwidth between 8MHz and SOMHz even if the signal being measured is DC This allows the op amp to recover quickly fro
89. o can result in noise and false readings Differential mode refers to a mode or circuit set up in which a voltage is measured between two signal lines The measured differential voltage is used for a single channel An advantage of using differential inputs is that they reduce signal errors and the induction of noise resulting from ground current The following illustration is an example of how noise is reduced or canceled out when using the differential mode In the schematic voltage signal Sz is subtracted from signal S resulting in the output signal shown Noise spikes with the same polarity phase and magnitude in each input signal cancel out resulting in a clean differential signal S S2 In the schematic signals S and S are shown in phase o however even if these signals were out of phase the Si noise in each indicated by jagged lines would still have the same magnitude phase and polarity For that reason they would still cancel out ao 2 Noise Reduction in Differential Mode Differential signal hookups do not provide isolation or any kind of circuit protection Resolution An analog to digital converter ADC converts an analog voltage to a digital number The digital number represents the input voltage in discrete steps with finite resolution ADC resolution is determined by the number of bits that represent the digital number An n bit ADC has a resolution of 1 part in 2 Thus 12 and 16 bit
90. om a succeeding stage in order to prevent an undesirable interaction between the two stages Also see Buffer In reference to Daq devices channel simply refers to a single input or output entity In a broader sense an input channel is a signal path between the transducer at the point of measurement and the data acquisition system A channel can go through various stages buffers multiplexers or signal conditioning amplifiers and filters Input channels are periodically sampled for readings An output channel from a device can be digital or analog Outputs can vary in a programmed way in response to an input channel signal Common mode pertains to signals that are identical in amplitude and duration also can be used in reference to signal components Common mode voltage refers to a voltage magnitude referenced to a common point that is shared by two or more signals Example referenced to common Signal 1 is 5 VDC and Signal 2 is 6 VDC The common mode voltage for the two signals is 5 5 VDC 5 6 2 An undesired transfer of signals between systems or system components Crosstalk causes signal interference more commonly referred to as noise A digital signal is one of discrete value in contrast to a varying signal Combinations of binary digits Os and 1s represent digital data A circuit or device that converts digital values binary bits into analog signals A DIP switch is a group of miniature switches in a small Du
91. onnected to the next higher odd numbered channel For example if A were connected to Counter 0 then B would be connected to Counter 1 Ground to Digital Common i To External Power Counter 0 To Encoder A To Ground Counter 1 To Encoder B Counter 2 To Encoder z ENCODER Encoder Connections to pins on the Personal Daq 3000 The ground depicted at the left is associated with Digital Common on the Personal Daq 3000 Series module The ground depicted at the right is associated with the external power source In addition to the previous figure the following table indicates how to connect a single encoder to a 3000 Series device Each signal A B Z can be connected as a single ended connection with respect to the common ground The encoder will need to be powered from an external power output typically 5 VDC Connect the encoder s power input to the power source and connect the return to digital common GND of that source The programming setup given below is just a representative of possible options Single Encoder Programming Example Setup for Personal Daq 3000 Series Module Screw Terminal Example Programming Setup TBS Terminal 2 Encoder A Encoder Mode 4X option 16 bit counter Latch on SOS Map channel Counter 0 CNTO Clears the counter set Map channel to CTR2 TB5 Terminal 1 Encoder B Period Mode 1Xperiod option 16 bit counter Map channel doesn t Counte
92. ontrol Outputs 6 7 Detection on an Analog Input DAC and P2C Updates 6 7 Detection on an Analog Input Timer Output Updates 6 8 Using the Hysteresis Function 6 8 Using Multiple Inputs to Control One DAC Output 6 10 The Setpoint Status Register 6 11 Personal Daq 3000 Series modules include a setpoint configuration feature which allows the user to individually configure up to 16 detection setpoints associated with channels within a scan group Each detection setpoint can be programmed in the following ways O Single Point referenced above below or equal to the defined setpoint o Window dual point referenced inside or outside the window o Window dual point referenced Hysterisis Mode outside the window high forces one output designated Output 2 outside the window low forces another output designated as Output 1 Detect Rising Edge Detect Falling Edge Condition True Condition False None Channel Update P2C Input SI Update DAC Update Timer Criteria Condition Action A digital detect signal is used to indicate when a signal condition is True or False 1 e whether or not the signal has met the defined criteria The detect signals themselves can be part of the scan group and can be measured as any other input channel thus allowing real time data analysis during an acquisition Each setpoint can update the following allowing for real time control bas
93. or 32 bit counters Clear On Read Mode The counter is cleared at the beginning of every scan or synchronous read and the final value of the counter the value just before it was cleared is latched and returned to the module COUNTER OPTI This determines if the counter is to rollover or stop at the top Rollover Mode The counter continues to count upward rolling over on the 16 bit Counter Low boundary or on the 32 bit Counter High boundary See OPT2 in regard to choosing 16 bit or 32 bit counters Stop at the Top Mode The counter will stop at the top of its count The top of the count is FFFF for the 16 bit option Counter Low and FFFFFFFF for the 32 bit option Counter High COUNTER OPT2 Determines whether the counter is 16 bits or 32 bits Counter Low or Counter High respectively This only matters when the counter is using the stop at the top option otherwise this option is inconsequential COUNTER OPT3 Determines which signal latches the counter outputs into the data stream back to the module Normally the start of scan signal latches the counter outputs at the beginning of every scan but an option is to have the mapped signal latch the counter outputs This mapped signal option allows a second signal to control the latching of the count data This allows the user to know the exact counter value when an edge is present on another channel This also allows the counters to be asynchronously read COUNTER
94. ounters are cleared at the beginning of the acquisition In this example the data comes in sets of four because the scan period is about one fourth as long as the input channel s period Every time the pulsewidth measurement is latched from the counter the counter is immediately cleared and enabled to count time for the next pulsewidth If the scan period is much slower than the input period then the acquisitions will miss some pulsewidths Decreasing the scan period will increase the number of different pulsewidths received The data returned is interpreted as time measured in ticks There are four timebase settings 20 833 ns 208 33 ns 2 083 us and 20 83 us These are often referred to as tick sizes The 3000 Series module uses a 48 MHz 50 ppm oscillator as a timing source If the input signal has a poor slew rate the pulsewidth mode will provide variant results Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 11 PULSEWIDTH OPT2 Determines whether the pulsewidth is to be measured with a 16 bit Counter Low or 32 bit counter High counter Since pulsewidth measurements always have the stop at the top option enabled this option dictates whether the measurement has a range of 0 to 65535 ticks or 0 to 4 294 967 295 ticks PULSEWIDTH OPT4 Allows the mapped channel to gate the counter When the mapped channel is high the counter is enabled to count When the mapped channel is low the counter is disa
95. output will also change state At the end of time period T4 the input changes state going low and the output follows this action by going low T5 During time period T5 the input signal again has disturbances that cause the input to not meet the debounce time requirement The output does not change state T6 After time period T6 the input signal has been stable for the debounce time and therefore any edge on the input after time period T6 will be immediately reflected in the output of the debounce module Mode Comparison The following example shows how the two modes interpret the same input signal which exhibits glitches Notice that the Trigger Before Stable mode will recognize more glitches than the Trigger After Stable mode Use the bypass option to achieve maximum glitch recognition i Debounce i Debounce Debounce 1 i Time Time Time l i i Input i Trigger Before Stable Trigger After Stable IO j Example of Two Debounce Modes Interpreting the Same Signal Debounce times should be set according to the amount of instability expected in the input signal Setting a debounce time that is too short may result in unwanted glitches clocking the counter Setting a debounce time too long may result in an input signal being rejected entirely Some experimentation may be required to find the appropriate debounce time for a particular application To see the effects of different debounce time
96. p Detection setpoints act on 16 bit data only Since the Personal Daq 3000 Series modules have 32 bit counters data is returned 16 bits at a time The lower word the higher word or both lower and higher words can be part of the scan group Each counter input channel can have detection setpoint for the counter s lower 16 bit value and 1 detection setpoint for the counter s higher 16 bit value 6 2 Setpoint Configuration for Output Control 887894 Personal Daq 3000 Series User s Manual Detecting Input Values All setpoints are programmed as part of the pre acquisition setup similar to setting up the analog path debounce mode or counter mode setup Since each setpoint acts on 16 bit data each has two 16 bit compare values Limit A High Limit and Limit B Low Limit These limits define the setpoint window There are several possible conditions criteria and effectively 3 update modes as can be seen in the following configuration summary Setpoint Configuration Summary 16 bit High Limit Identified as Limit A in software 16 bit Low Limit Identified as Limit B in software Criteria eee Inside window Signal is below Limit A and Above Limit B Outside window Signal is above Limit A or below Limit B Greater than value Signal is above Limit B Limit A is not used Less than value Signal is below Limit A Limit B is not used Equal to value Signal is equal to Limit A Limit B is not used Note that the Eq
97. perating temperature with non condensing humidity conditions no conductive particles are permitted in the atmosphere warm up time is sufficient to avert any condensation or frost no hazardous voltages are applied until completion of the warm up period Pollution Degree II implies the expectation of occasional condensation e overvoltage installation category classification with limits for transient overvoltage dependent on the nominal line voltage to earth Category I implies signals without high transient values Category II applies to typical mains power lines with some transients Safety Conditions Users must comply with all relevant safety conditions in the user s manual and the Declarations of Conformity This manual and the associated hardware make use of the following Warning and Caution symbols If you see either of these symbols on a product carefully read the related information and be alert to the possibility of personal injury This warning symbol is used in this manual or on the equipment to warn of possible injury or death from electrical shock under noted conditions This warning caution symbol is used to warn of possible personal injury or equipment damage under noted conditions Personal Daq products contain no user serviceable parts refer all service to qualified personnel The specific safety conditions for CE compliance vary by product but general safety conditions include e The operator must observe
98. ps for Making Accurate Temperature Measurements o Use as much oversampling as possible See section Oversampling and Line Cycle Rejection page A 6 o Apply Line Cycle Noise Reduction See section Oversampling and Line Cycle Rejection page A 6 o Make sure the unit has been warmed up for at least 60 minutes including the installed terminal blocks and thermocouple wires This allows the unit to thermally stabilize so the CJC thermistors can accurately measure the junction at the terminal block o Make sure the environment around the Personal Daq 3000 or PDQ30 is thermally stabilized and ideally around 20C to 30C If the Personal Daq s ambient temperature is changing due to a local heating or cooling source then the TC junction temperature may be changing and the CJC thermistor will have a larger error o Use small diameter thermocouple wire that is instrument grade Small diameter thermocouple wire will have less effect on the thermocouple junction at the terminal block less heat will be transferred from the ambient environment to the junction o Make sure the Personal Daq 3000 or PDQ30 is lying on a flat surface o Ifthe unit will have a sustained ambient operating environment outside of the 20C to 30C range consider autozero mode as a way to reduce the effects of offset drift Performing a Y MX B adjustment at a desired ambient temperature can also be done make sure the unit has stabilized for at least 60 minutes o Be
99. quisition pacer clock also called the scan clock All 4 DACs and the 16 bits of pattern digital output are updated at the beginning of each scan Note that the DACs will actually take up to 4 us after the start of scan to settle on the updated value This is due to the amount of time to shift the digital data out to the DACs plus the actual settling time of the digital to analog conversion The data for the DACs and pattern digital output comes from a PC based buffer The data is streamed across the USB2 bus to the Personal Daq 3000 It is possible to update the DACs and pattern digital output with the DAC pacer clock either internally generated or externally applied In this case the acquisition input scans are not synchronized to the analog outputs or pattern digital outputs It is possible to synchronize everything input scans DACs pattern digital outputs to one clock That clock can be either internally generated or externally applied Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 13 Counter Inputs Each Personal Daq 3000 Series module includes four 32 bit counters and each of the four counters accepts frequency inputs up to 20 MHz The high speed counter channels can be configured on a per channel basis Possible configurations include the following modes Counter Period Pulse width Time between edges Multi axis quadrature encoder O of Go The counters can concurrently monitor time pe
100. r 1 CNT1 gate Ticksize to 208 3 ns TB4 Terminal 2 Encoder Z Counter in Totalize mode stop at the top 16 bit counter Counter 2 CNT2 If the encoder stops rotating but is vibrating due to the machine it 1s mounted to the debounce feature can be used to eliminate false edges An appropriate debounce time can be chosen and applied to each encoder channel Refer to the Debounce Module section on page 5 1 for additional information regarding debounce times Relative position and velocity can be obtained from the encoder However during an acquisition data that is relative to the Z position cannot be obtained until the encoder locates the Z reference During an acquisition data that is relative to the Z position cannot be obtained until the encoder locates the Z reference Note that the number of Z reference crossings can be tabulated If the encoder was turning in only one direction then the Z reference crossings will equal the number of complete revolutions This means that the data streaming to the PC will be relative position period I velocity and revolutions 5 18 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual A typical acquisition might take 6 readings off of the Personal Daq 3000 as illustrated below The user determines the scan rate and the number of scans to take ekl eeel e w n aul Scan Period Personal Daq 3000 Series Acquisition of Six Readings per Scan Note Digital
101. r Stable Mode In the Trigger After Stable mode the output of the debounce module will not change state until a period of stability has been achieved This means that the input has an edge and then must be stable for a period of time equal to the debounce time Input Output T1 T2 T3 T4 TS Debounce Module Trigger After Stable Mode The following time periods T1 through T5 pertain to the above drawing In Trigger After Stable mode the input signal to the debounce module is required to have a period of stability after an incoming edge in order for that edge to be accepted passed through to the counter module The debounce time for this example is equal to T2 and TS T1 In the example above the input signal goes high at the beginning of time period T1 but never stays high for a period of time equal to the debounce time setting equal to T2 for this example T2 At the end of time period T2 the input signal has transitioned high and stayed there for the required amount of time therefore the output transitions high If the Input signal never stabilized in the high state long enough no transition would have appeared on the output and the entire disturbance on the input would have been rejected T3 During time period T3 the input signal remained steady No change in output is seen T4 During time period T4 the input signal has more disturbances and does not stabilize in any state long enough No change in the o
102. rejection is just another mode of oversampling where 16384 8192 4096 etc consecutive samples are averaged over one line cycle of 50Hz or 60Hz When oversampling is employed it is done for all analog channels in the scan group voltage temperature CJC autozero Personal Daq 3000 channels and PDQ30 channels Digital channels are not oversampled Increasing the amount of oversampling will drastically decrease the maximum allowable scan rate During acquisitions the system controller reads each of the channel entries in the scan list and measures each channel according to the desired channel number and gain If oversampling is enabled the acquisition engine reads each of the channel entries in the scan list and takes multiple consecutive measurements without changing the channel or gain All consecutive 16 bit measurements are averaged and then returned to the software In the case of line cycle rejection the acquisition engine adjusts the conversion time of the ADC slightly so that 16384 8192 4096 etc samples will fit inside one line cycle of 50 Hz 20ms or 60Hz 16 666ms When enabled line cycle rejection can be applied to all analog channels in the scan list or it can be applied exclusively to thermocouple channels A 6 Signal Modes and System Noise 937492 Appendix A Glossary Acquisition Analog Analog to Digital Converter ADC API Bipolar Buffer Buffer Amplifier Channel Common mode Common mode voltage Cro
103. rement is latched from the counter the counter is immediately cleared and begins to count the time for the subsequent period If the scan period is a lot slower than the input period the acquired data will be missing some periods To obtain greater resolution you can increase the scan period or use an averaging option see OPT 1 0 The data returned is interpreted as time measured in ticks There are four timebase settings 20 83 ns 208 3 ns 2083 ns and 20833 ns These are often referred to as tick sizes The 3000 Series module uses a 48 MHz 50 ppm oscillator as a timing source The tick sizes are derived from 1 period 10 periods 100 periods or 1000 periods of the 48 MHz clock 5 8 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual PERIOD OPT 1 0 Determines the number of periods to time per measurement This makes it possible to average out jitter in the input waveform sampling error noise etc There are four options 1 The channel s measurement is latched every time one complete period has been observed 2 The channel s measurement is latched every time that 10 complete periods have been observed The value that gets returned is equal to 10 consecutive periods of the input channel 3 The number returned is 100 consecutive periods 4 The number returned is 1000 consecutive periods PERIOD OPT2 Determines whether the period is to be measured with a 16 bit Counter Low or 32 bit Counter Hig
104. resolutions are as follows e 12 bit resolution 1 part in 4096 2 corresponding to 2 44 mV ina 10 V range e 16 bit resolution 1 part in 65 536 2 corresponding to 0 153 mV ina 10 V range 937492 Signal Modes and System Noise A 1 Connecting Thermocouples to Screw Terminal Blocks A 2 Thermocouple wires are to be connected in differential mode only Differential connection is made as follows Personal Daq 3000 Series modules can measure 16 channels of voltage in single ended mode 8 channels of voltage in differential mode or 8 channels of temperature in differential mode You can of course m1x signal types for example have some channels connected to thermocouples and others connected to voltage signals g Analog Common CHO CHOHI CH8 CHOLO Analog Common CH1 CH1HI CH9 CH1LO Analog Common CH 2 CH2HI CH 10 CH 2 LO Analog Common CH3 CH3HI CH 11 CH3LO a the red thermocouple wire connects to the channel s Low L connector Thermocouple b the other color wire connects to the channel s High H connector Na Single Ended V1 and V2 and Differential V3 Connections to Analog Input Channels Thermocouple wire is standardized color coded and polarized as noted in the following table Thermocouple Standards Lead to Lead to Channel High Channel Low Thermocouples output very small voltages and long thermocouple leads can pickup a large amount of noise If desired noise red
105. returned in the scan is the number of ticks that make up the time measurement Counter Options The following mode options are available with the 3000 Series module and are detailed in the upcoming pages A separate block diagram has been created for each mode Note that the OPT numbers relate to sections of the block diagrams Counter Totalize Mode see page 6 OPTO Selects totalize or clear on read mode OPT1 Determines if the counter is to rollover or stop at the top OPT2 Determines whether the counter is 16 bits Counter Low or 32 bits Counter High OPT3 Determines which signal latches the counter outputs into the data stream back to the module Start of scan or mapped channel OPT4 Allows the mapped channel to gate the counter OPT5 Allows the mapped channel to decrement the counter OPT 6 Allows the mapped channel to increment the counter Period Mode see page 8 OPT 1 0 Determines the number of periods to time per measurement 1 10 100 1000 OPT2 Determines whether the period is to be measured with a 16 bit Counter Low or 32 bit Counter High OPT4 Allows the mapped channel to gate the counter OPT 6 Allows the mapped channel to be measured for periods Pulsewidth Mode see page 11 OPT2 Determines whether the pulsewidth is to be measured with a 16 bit counter Counter Low or a 32 bit counter Counter High OPT4 Allows the mapped channel to gate the counter OPT6 Allows the mapped channel
106. ring Trigger Sources 7 individually selectable for starting and stopping an acquisition Stop acquisition can occur on a different channel than start acquisition stop acquisition can be triggered via modes 2 4 5 or 6 described below 1 Single Channel Analog Hardware Trigger Any analog input channel can be software programmed as the analog trigger channel including any of the analog expansion channels Input Signal Range 10 to 10V max Trigger Level Programmable 12 bit resolution Hysteresis Programmable 12 bit resolution Latency 350 ns typical 1 3 us max Accuracy 0 5 of reading 2 mV offset Noise 2 mV RMS 2 Single Channel Analog Software Trigger Any analog input channel including any of the analog expansion channels can be selected as the software trigger channel If the trigger channel involves a calculation such as temperature then the driver automatically compensates for the delay required to obtain the reading resulting in a maximum latency of one scan period Input Signal Range Anywhere within the range of the selected trigger channel Trigger Level Programmable 16 bit resolution including window triggering Latency One scan period max 3 Single Channel Digital Trigger A separate digital input is provided for digital triggering Input Signal Range 15V to 15V Trigger Level TTL Minimum Pulse Width 50 ns high 50 ns low Latency 100 ns typical 1 1 us max 4 Digital Pattern Trigger 8 or 16 bi
107. riods frequencies pulses and other event driven incremental occurrences directly from encoders pulse generators limit switches proximity switches and magnetic pick ups As with all other inputs to the modules the counter inputs can be read asynchronously under program control or synchronously as part of an analog and digital scan group based on a programmable internal timer or an external clock source The modules support quadrature encoders with up to 2 billion pulses per revolution 20 MHz input frequencies and x1 x2 x4 count modes With only A phase and B phase signals 2 channels are supported With A phase B phase and Z index signals 1 channel is supported Each input can be debounced from 500 ns to 25 5 ms total of 16 selections to eliminate extraneous noise or switch induced transients Encoder input signals must be within 5V to 10V and the switching threshold is TTL 1 3V Reference Note For detailed information regarding the various counter modes refer to Chapter 5 Counter Input Configuration Modes Timer Outputs Two 16 bit timer outputs are built into every 3000 series module Each timer is capable of generating a different square wave with a programmable frequency in the range of 16 Hz to 1 MHz Example 6 Timer Outputs Timer outputs are programmable square waves The period of the square wave can be as short as lus or as along as 65536 us See the table below for some examples Timer Output Frequency
108. s connected directly to a component in the vehicle at a potential that is over the maximum common mode voltage then very noisy or incorrect readings will be seen Thermocouple connections that are made directly to the alternator or engine block may also result in high noise Two methods of reducing noise are a Runa ground line from the screw or bolt as indicated in the following figure b Isolate the thermocouple leads with a set of washers one of which is electrically insulating such as mica as indicated in the second figure The length of the insulating shoulder washer s hub must not exceed the combined thickness of the terminal ring and mica washer The insulating shoulder washer me is non metallic It is made of Flat insulating material such as Washer Ss plastic Shoulder y Washer To Personal Dag 3000 Series Device Screw or Bolt If a thermocouple shield is connected to the Personal Daq 3000 module leave the shield unconnected at the other end of the thermocouple Connecting the shield to common at both Screw or Bolt Terminal Rings hal To Personal Daq 3000 series Device Ground Wire to Negative Terminal of Vehicle Battery Running a Ground Wire to the Battery s Negative Terminal A thin layer of heat sink compound on the indicated surfaces will improve thermal conductivity Heat Sink Compound Mica Washer Using a Washer Set and Heat Sink to Isolate t
109. sstalk Digital Digital to Analog Converter DAC DIP switch Differential mode Glossary A collection of scans acquired at a specified rate as controlled by the sequencer A signal of varying voltage or current that communicates data A circuit or device that converts analog values into digital values such as binary bits for use in digital computer processing Application Program Interface The interface program within the Daq system s driver that includes function calls specific to Daq hardware and can be used with user written programs several languages supported A range of analog signals with positive and negative values e g 5 to 5 V see unipolar Buffer refers to a circuit or device that allows a signal to pass through it while providing isolation or another function without altering the signal Buffer usually refers to a A device or circuit that allows for the temporary storage of data during data transfers Such storage can compensate for differences in data flow rates In a FIFO First In First Out buffer the data that is stored first is also the first data to leave the buffer b A follower stage used to drive a number of gates without overloading the preceding stage c An amplifier which accepts high source impedance input and results in low source impedance output effectively an impedance buffer An amplifier used primarily to match two different impedance points and isolate one stage fr
110. t pattern triggering on any of the digital input ports Programmable for trigger on equal above below or within outside of a window Individual bits can be masked for don t care condition Latency One scan period max 5 Counter Totalizer Trigger Counter totalizer inputs can trigger an acquisition User can select to trigger on a frequency or on total counts that are equal above below or within outside of a window Latency One scan period max 6 Software Trigger Trigger can be initiated under program control 7 Multi Channel Triggering Up to 16 channels can be used to generate a trigger condition for any combination of analog digital or counter inputs Multiple channels can either be combined in a logical or or and condition with hysteresis programmable per channel Maximum latency in this mode is one scan period Note Specifications are subject to change without notice 937492 Specifications 7 7 Analog Outputs Applicable to Personal Daq 3000 and 3001 only Analog output channels are updated synchronously relative to scanned inputs and clocked from either a Personal Daq 3000 Series internal clock or an external clock source Analog outputs can also be updated asynchronously independent of any other scanning in the system Streaming from disk or memory is supported allowing continuous waveform outputs limited only by available PC system resources Channels Personal Daq 3000 2 DAC channels DACO DAC1
111. ter Measurements gt 1 MHz 5 1 Debounce Module 5 1 Terms Applicable to Counter Modes 5 5 Counter Options 5 5 Counter Totalize Mode 5 6 Period Mode 5 8 Pulsewidth Mode 5 11 Timing Mode 5 13 Encoder Mode 5 15 Personal Daq 3000 Series User s Manual 888494 v 6 Setpoint Configuration for Output Control Overview 6 1 Detecting Input Values 6 3 Controlling Analog Digital and Timer Outputs 6 4 P2C DAC or Timer Update Latency 6 6 More Examples of Control Outputs 6 7 Detection on an Analog Input DAC and P2C Updates 6 7 Detection on an Analog Input Timer Output Updates 6 8 Using the Hysteresis Function 6 8 Using Multiple Inputs to Control One DAC Output 6 10 The Setpoint Status Register 6 11 7 Specifications Personal Daq 3000 Series and PDQ30 Appendix A Signal Modes and System Noise Signal Modes A 1 Connecting Thermocouples to Screw Terminal Blocks A 2 Shielding A 3 TC Common Mode A 3 Cold Junction Compensation Techniques A 4 System Noise A 5 Averaging A 5 Analog Filtering A 5 Input and Source Impedance A 5 Crosstalk A 5 Oversampling and Line Cycle Rejection A 6 Glossary vi 888494 Personal Daq 3000 Series User s Manual Personal Daq 3000 Series Quick Start USB1 MHz 16 Bit Multifunction
112. tly or via a CA 96A cable Refer to the above figures 4 Refer to the Declaration of Conformity in regard to meeting CE requirements Personal Daq 3000 Series User s Manual 888594 Connections amp Pinouts 2 3 Pinout for PDQ30 DSUB25 Edge of PDQ30 Module Analog CH63 CH31LO CH16 CH8HI Analog CH55 CH31HI CH 24 CH8LO Analog Analog Common Analog CH62 CH30LO CH17 CH9HI Analog CH54 CH30HI Analog CH61 CH29LO Analog CH53 CH29HI CH 26 CH10LO Analog Analog Common CH19 CH11HI Analog Analog CH52 CH28HI CH 27 CH11LO Analog Analog Common Analog CH59 CH27LO Analog CH51 CH27HI Analog CH58 CH26LO Analog CH50 CH26HI a CH 29 CH13LO Analog Analog Common oe CH 31 CH15LO Analog EE CH 33 CH17HI Analog CH41 CH17LO Analog ay Analog Common Analog CH45 CH21LO a SS CH34 CH18HI Analog CH 42 CH18LO Analog Analog Common Analog CH44 CH20LO CH35 CH19HI Analog Analog CH36 CH20HI CH 43 CH19LO Analog Note PDQ30 can measure 48 channels of voltage or 24 channels of temperature Temperature measurement requires the use of differential mode Reference Note For PDQ30 specifications refer to chapter 7 2 4 Connections amp Pinouts 888594 Personal Daq 3000 Series User s Manual Connecting for Single Ended or Differential Voltage signals can be connected using the Single Ended method In the following figure voltage source V1 is connected to Channel 0 and to analog
113. to 200mV_ 0 036 0 05 4 12 8 0 042 0 10 Specifications assume differential input single channel scan 1 MHz scan rate unfiltered CMV 0 0V 30 minute warm up exclusive of noise range is FS to FS Noise reflects 10 000 samples at 1 MHZ typical differential short TC Types and Accuracy z 50 to 1768 50 to 1768 4 7 1 5 270 1300 to 300 to 1400 Assumes 16384 oversampling applied CMV 0 0V 60 minute warm up still environment and 25 C ambient temperature excludes thermocouple error TC 0 C for all types except B 1000 C TR 2 for External Power Oversampling Effect on Measurement Noise Type T Thermocouple Lines represent theoretical noise P P Noise in Measurement C 0 100 Measured Temperature C 7 4 Specifications 937492 Note Specifications are subject to change without notice Per Channel Error External Power Channel Per Channel Error USB Power Channel Typical Performance of 8 Personal Daq 3001 Modules Assumes 16384 oversampling applied CMV 0 0V 60 minute warm up still environment and 25 C ambient temperature excludes thermocouple error TCy 0 C Note Specifications are subject to change without notice 937492 Specifications 7
114. tor is in the proper state at the beginning of the acquisition 3 Bring the analog input signal toward the desired threshold When the input signal is at the threshold some tolerance the sweep will be triggered 4 Before re arming the trigger again move the analog input signal to a level that is more than 2 5 of the full scale range away from the desired threshold Example an engineer is using the 2V full scale range gain 5 he desires to trigger at 1V on the rising edge he sets the analog input voltage to an initial start value which is less than 0 9V 1V 2V 2 2 5 Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 9 Digital Triggering A separate digital trigger input line is provided allowing TTL level triggering with latencies guaranteed to be less than 1 us Both the logic levels 1 or 0 as well as the rising or falling edge can be programmed for the discrete digital trigger input Pattern Triggering The user can specify a 16 bit digital pattern to trigger an acquisition including the ability to mask or ignore specific bits Software Based Channel Level Triggering This mode differs from the modes just discussed because the readings analog digital or counter are interrogated by the PC in order to detect the trigger event Triggering can also be programmed to occur when one of the counters reaches exceeds or 1s within a programmed window Any of the built in co
115. ts DSUB25F BC to DG jr Expansion interlace Convector eer Configuraite Confkyurable er Nola 2 Note 1 Rofer to Chapter 2 for complete torminal Hock pinoi PLD EEPROM Note 2 Oplional poveer source TR 2 adapler connect to iha External Pov connector if the USE eannot supply onmagh power See Specifications in regard to power Conseumphoan Block Diagram for Personal Dag 3000 and 3001 Personal Daq 3000 has two 16 Bit Digital to Analog Converters Personal Daq 3001 has four 16 Bit Digital to Analog Converters Personal Daq 3000 Series User s Manual 988093 Daq Systems and Device Overviews 1 1 Note 1 B BBE t5 SE Praga mints yc TES J Analog ipui Gann Amiar a hig i Tu H e H Analog Channel Malet ai z i F i Input Protection one ial aie a i doe te Rae CV enie F S12 Siep Ona TTL Trigger input One a k Analog Input Pacer Clock tel Input ft TELLER Random Access i Channel Gain Clock L SHEN PLATO Teo 16 Bit Timer Outputs a Sequencer Reset Ja TBG i Programmable Four 92 8 Counter inputs i i Sanu Orica Ja Tirta ba a Tare fo 19 hours ad l Digital VO Pois j b H S ayaiem USB h paa C L eee L PoP CELE LET o s Extemal DSUBHSF o DC Can hi ya Expansion Intertoce onwerhes P in Configurable Configuratile Mole 2 Note 1 Refer to Chapter 2 for complete terminal block pinout PLO EEPROM
116. ual to mode is intended for use with counter or digital input channels as the source channel See the TIP below Hysteresis mode Outside the window high forces Output 2 until an outside the window low condition exists then Output 1 is forced Output 1 continues until an outside the window high condition exists The cycle repeats as long as the acquisition is running in Hysterisis mode Update Mode Update on True Only Update on True and False None Do not update 16 bit DAC value P2C value or Timer value when input meets criteria 16 bit DAC value P2C value or Timer value when input does not meet criteria Type of Action None Update P2C see note Update DACx Update Tlmerx By software default P2C comes up as a digital input If you want the P2C signal to be a digital output in some initial state before an acquisition is started and P2C is to be updated by set point criterion then you must do an asynchronous write to P2C before the acquisition is started The initial value will only be output if the asynchronous write to P2C has been performed DAC defaults are 0V If an initial condition other than OV is desired you must do an asynchronous write to the associated DAC before the acquisition is started When using setpoints with triggers other than immediate hardware analog or TLL the setpoint criteria evaluation will begin immediately upon arming the acquisition TIP It is recommended that the Equa
117. uction can be achieved through the use of shielded thermocouples and or averaging You can minimize the effect of noise by employing one or more of the following practices Using all three is best 1 Use shielded thermocouples see Shielding page A 3 2 Average readings see Averaging page A 5 3 Route thermocouple wires away from others Wires adjacent or close to TC wires may introduce noise into the TC wires For example you should never route TC wires in a conduit that is being used for mains or motor drive power Such practices could introduce a great deal of signal noise Signal Modes and System Noise 937492 Appendix A Shielding Using shielded TC wire with the shield connected to analog common will result in further noise reduction Personal Daq 3000 Series modules have one analog common screw terminal connection for every 2 analog SE channel connections You can connect the shield of a shielded thermocouple to one of the analog common terminals When this connection is made the shield at the other end of the thermocouple is to be left unconnected ends will result in a ground loop TC Common Mode The maximum common mode voltage for a Personal Daq 3000 Series module is 10 volts Common mode voltage is the DC or AC voltage signal that is applied equally to both sides of a differential input Since thermocouples are measured using the 100 mV range their maximum common mode voltage is 6 volts If a thermocouple i
118. ue Sampling Error ts Less than 0 21 The 32 bit ranges shown above are much wider than the 16 bit ranges but also require the full 32 bit value to be returned Since digital or counter channels do not take up any time in the scan period there is no disadvantage in reading a 32 bit counter versus a 16 bit counter The 32 bit frequency ranges can also be exceeded with a loss of accuracy or topping out at 4 294 967 295 counts Some measurements will require the accuracy of an input waveform to be free of sampling error having only the absolute accuracy of the internal timebase as the source of error Sampling error can be averaged out to give the required result In most cases the 3000 Series device can perform the required averaging on the values before they are returned to the PC The frequency ranges shown below will give a sampling error that is less than 10ppm or 1ppm Full 32 bit Counter lt 10 ppm Full 32 bit Counter lt 1 ppm Range Hz Ticksize nS Averaging Range Hz Ticksize nS Averaging Option Option 15u 50m 20833 333 15u 500m 20833 333 _150u 5 2083 333 1 1 l 833 100 833 100 150m 5k 20 833 150m 500 20 833 1 5 50k 20 833 100 1 5 5k 20 833 100 15 500k 20 833 1000 15 50k 20 833 1000 High Accuracy Frequency Ranges for a 32 bit Value that has little sampling error lt l0ppm lt Ippm If the input frequency is required to have less than 1 ppm sampling error and is
119. ues The single ended mode measures a voltage between a signal line and a common reference that may be shared with other channels Also see differential mode An event to start a scan or mark an instant during an acquisition The event can be defined in various ways e g a TTL signal a specified voltage level in a monitored channel a button manually or mechanically engaged a software command etc Some applications may use pre and post triggers to gather data around an instant or based on signal counts Transistor Transistor Logic TTL is a circuit in which a multiple emitter transistor has replaced the multiple diode cluster of the diode transistor logic circuit typically used to communicate logic signals at 5 V A range of analog signals that is always zero or positive e g O to 10 V Evaluating a signal in the right range unipolar or bipolar allows greater resolution by using the full range of the corresponding digital value See bipolar 887194 Glossary
120. ull 32 bit Counter lt 1 ppm Range S Ticksize nS Averaging Range S Ticksize nS Averaging 2 80000 20833 333 20 80000 20833 333 200m 8000 2083 333 2 8000 2083 333 20m 800 208 333 200m 800 208 333 20 833 20m 80 20 833 High Accuracy Pulsewidth and Time Ranges for a 32 bit Value that has little sampling error lt l0ppm lt Ippm 5 12 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual Timing Mode This mode provides a means of measuring time between two subsequent events 1 e the edge of one channel with respect to the edge of another channel The edge selection is done in each channel s debounce setup Whenever the time measurement is latched from the counter the counter is immediately cleared and enabled for accepting the subsequent time period which starts with the next edge on the main channel a Low Word High Word Increment d i K Note 1 bl Melee Counter OPT2 To PC ci Buffer Channel Input lear Post Debounce 4 Channel Inputs i Post Debounce Timing Mode Edge Detector A 4 Asynchronous i Read Strobes OOo appad Channel Timing Mode There is one asynchronous read strobe for each of the four counter channels Note 1 Tick sizes are 20 83ns 208 3ns 2083ns and 20833ns derived from the 48 MHz system clock Personal Daq 3000 Series User s Manual 887894 Counter Input Modes 5 13 An Example of Timing Mode The following example
121. unter totalizer channels can be programmed as a trigger source Triggers can be detected on scanned digital input channel patterns as well Normally software based triggering results in long latencies from the moment a trigger condition is detected until the instant data is acquired However the Personal Daq 3000 Series circumvents this undesirable situation by use of pre trigger data Specifically when software based triggering 1s employed and the PC detects that a trigger condition has occurred which may be thousands of readings after the actual occurrence of the signal the Personal Daq driver automatically looks back to the location in memory to where the actual trigger causing measurement occurred The acquired data presented to the user begins at the point where the trigger causing measurement occurs The maximum latency in this mode is equal to one scan period Stop Trigger Any of the software trigger modes previously described including scan count can be used to stop an acquisition Thus an acquisition can be programmed to begin on one event such as a voltage level and then can stop on another event such as a digital pattern Pre Triggering and Post Triggering Modes Six modes of pre triggering and post triggering are supported providing a wide variety of options to accommodate any measurement requirement When using pre trigger the user must use software based triggering to initiate an acquisition The six modes are o No pre tri
122. utput is seen T5 At the end of time period T5 the input signal has transitioned low and stayed there for the required amount of time therefore the output goes low Trigger Before Stable Mode In the Trigger Before Stable mode the output of the debounce module immediately changes state but will not change state again until a period of stability has passed For this reason the mode can be used to detect glitches Debounce Module Trigger Before Stable Mode The following time periods T1 through T6 pertain to the above drawing T1 In the illustrated example the Input signal is low for the debounce time equal to T1 therefore when the input edge arrives at the end of time period T1 it is accepted and the Output of the debounce module goes high Note that a period of stability must precede the edge in order for the edge to be accepted 5 2 Counter Input Modes 887894 Personal Daq 3000 Series User s Manual T2 During time period T2 the input signal is not stable for a length of time equal to T1 the debounce time setting for this example Therefore the output stays high and does not change state during time period T2 T3 During time period T3 the input signal is stable for a time period equal to T1 meeting the debounce requirement The output is held at the high state This is the same state as the input T4 At anytime during time period T4 the input can change state When this happens the
123. value then 18 samples are being returned to the PC every scan period each sample being 16 bits 32 bit counter channels are divided into two 16 bit samples one for the low word and the other for the high word If the maximum scan frequency is 166 666 Hz then the data bandwidth streaming into the PC is 3 MSamples per second Some slower PCs may have a problem with data bandwidths greater than 6 MSamples per second All Personal Daq 3000 Series devices have an onboard 1 Msample buffer for acquired data Analog Input amp Channel Expansion The Personal Daq 3000 series has a 16 bit 1 MHz A D coupled with 16 single ended or 8 differential analog inputs Seven software programmable ranges provide inputs from 10V to 100 mV full scale Each channel can be software configured for a different range as well as for single ended or differential bipolar input Adding additional analog input channels to the 3000 series modules is easy with the optional PDQ30 expansion module The PDQ30 can connect directly to the Personal Daq s female DSUB25 connector or be connected via cable CA 96A PDQ30 adds an additional 48 single ended or 24 differential ended analog inputs for a total channel capacity of 64 single ended or 32 differential inputs Measurement speed of PDQ30 channels is the same 1 Msample s exhibited by the 3000 module channels 1 8 Daq Systems and Device Overviews 988093 Personal Daq 3000 Series User s Manual USB2 0 versus USB1 1
124. voltage is inside the setpoint window condition True timer0 will be updated with one value and whenever the Channel 23 analog input voltage is outside the setpoint window condition False timer0 will be updated with a second output value An output value of 65535 will stop the timer Limit A for Channel 23 Limit B for Channel 23 Ch23 analog input voltage Detection Signal TimerO Updating a Timer Output Update on True and False 6 8 Setpoint Configuration for Output Control 887894 Personal Daq 3000 Series User s Manual Using the Hysterisis Function Update Mode N A the Hysterisis option has a forced update built into the function Criteria Used window criteria for above and below the set limits The figure below shows analog input Channel 3 with a setpoint which defines two 16 bit limits Limit A High and Limit B Low These are being applied in the hysteresis mode and DAC Channel 0 will be accordingly In this example Channel 3 s analog input voltage is being used to update DACO as follows o When outside the window low below Limit B DACO is updated with 3 0V This update will remain in effect until the analog input voltage goes above Limit A o When outside the window high above Limit A DACO is updated with 7 0V This update will remain in effect until the analog input signal falls below Limit B At that time we are again outside the limit low and the update process repeats itself Hysteres

Personal Daq/3000 User`s Manual

Contents

Download Pdf Manuals

Related Search

Related Contents