MODEL AIM-16 USER MANUAL - ACCES I/O Products, Inc.
Contents
1. While this offset increases the range and resolution of RTD operation remember that it is a selection that affects all channels on a given card Connections to an RTD sensor are as follows the V I lead to the input the V lead to the input and the I to the GND input If all of your sensors are RTDs model AIM 16R is designed specifically for RTDs Considerations for Strain Gage Sensors A ratiometric reading of a strain gage sensor requires input to two channels of an AIM 16 card One channel measures the sensor excitation while the other channel reads the sensor output The host computer computes the output as a ratio of the sensor output to sensor excitation This requires different gains for each signal nominally a gain of 1 for the excitation and 200 for the signal Thus strain gage measurement requires the use of programmable gain on an AIM 16 board Excitation for the strain gage s is available at a screw terminal block on the AIM 16 That excitation is derived from the AD12 8 s precision 10V reference voltage and can supply over 200mA current A jumper should be installed in the STD position of the programming point labeled OFST STD When the STD position is selected no offset is produced Page 4 2 Manual MAIM 16 D1e Considerations for Current Inputs The AIM 16 card has provisions for reading input current Reserved space and board connections are available for 16 precision resistors To utilize this pr2. Sample Programs Two sample programs directly use the AIM 16 SAMPLE2 performs timer driven interrupts using all channels of a single AIM 16 This program can be easily modified to support the maximum number of eight AIM 16s SAMPLES performs similar functions to SAMPLE2 but uses the SETUP CFG configuration file to setup the driver If you compare the two samples you will see the substantial decrease in program code required when using this auto configuration SETMUX The SETMUX setup utility program provides a graphical reference to assist you in configuring your AIM 16 for the various features provided by this card The setup program allows you to assign AIM 16s or reference junctions to any of the eight A D channels After you assign your AIM 16s to their respective A D channels you may make individual channel assignments for the various types of inputs supported such as thermocouples or voltage inputs using any of the programmable gains supported Upon exiting the SETMUX program the setup and configuration information is stored in a file called SETUP CFG The drivers or your own application program can then use this file to determine the configuration of your system SETMUX also provides for calibration of your AIM 16 See the Calibration and Test section of Installation for instructions on using this feature Manual MAIM 16 D1e Page 3 1 AIM 16 Manual Page 3 2 Manual MAIM 16 D1e Chapter 4 Sensor Interface Before attempt
3. an offset and addition of a gain adjustment pot so that full 12 bit resolution is provided Model AIM 16R is specifically modified to provide the best possible accuracy for RTD inputs Manual MAIM 16 D1e Page 1 1 AIM 16 Manual Specifications Analog Inputs and Outputs Input Channels 16 Differential Analog Input Channels per AIM 16 e Output Channels Analog Output assignable to 1 of 8 Output Channels e Common Mode Rejection 125 db for gains above 100 90 db for gain 1 e Output Rating 5mA at 10VDC or 5VDC Gain Nonlinearity 0 005 e Temp Coefficient 5 ppm e Overvoltage Continuous 70V peak to peak 35 VDC e Sensors Thermocouples with break detect provided RTDs with excitation and offset provided Strain gages with ratiometric outputs Voltage and current inputs e Reference Junction Temperature Scale Factor 24 4mV C 0 0VDC 0 C Reference junction temperature output assignable as an input to Analog Input Channel 0 or to any Output Channel e Preamplifier 12 Analog Gains ranging from 0 5 to 1000 Programmable gains selected by computer channel by channel Manual gains selected by DIP switch one gain setting for all channels e Three TTL digital inputs for gain selection e Control Inputs Four TTL digital inputs for channel selection Terminations Analog inputs Plug on screw terminal blocks for 12 22 AWG wire e Digital Input Analog Output 37 Sub D conne
4. for thermocouples and other non linear sensors Risc bat A batch file demonstrating the command line parameters of RISCTerm exe RISCTerm exe A dumb terminal type communication program designed for RS422 485 operation Used primarily with Remote Data Acquisition Pods and our RS422 485 serial communication product line Can be used to say hello to an installed modem RISCTerm stands for Really Incredibly Simple Communications TERMinal Installation of the AIM 16 The AIM 16 is installed external to the host computer It provides screw terminal termination for input analog wiring and multiplexing and preamplification for input signals Multiplexed and amplified signals are then passed from the AIM 16 to an analog to digital converter via a 37 conductor ribbon cable The screw terminal blocks used to connect analog input wires can be removed from the card to facilitate wire installation After the wiring has been installed the terminal blocks can then be plugged back onto the card Inputs to the AIM 16 are labelled INO through IN15 Note that for thermocouple temperature measurements INO may be used as the input channel for the on board reference junction sensor so that reference Junction compensation may be accomplished Note No input may be connected to INO when the TMP jumpers are installed Page 2 4 Manual MAIM 16 D1e Input connections are labeled GND and Shields should be connected to the GND terminal if not groun
5. option selects which AD12 8 A D input channel will be used by the AIM 16 Install a jumper in a one of the positions labeled OVO through OV7 OV stands for output voltage This channel must not be used by any other AIM 16 or reference junction in the system Usually the first AIM 16 in a system 15 set to OVO If a second AIM 16 is to be used you set it s jumper to OV1 a third to OV2 etc Reference Junction Temperature Input Channel Selection When making thermocouple temperature measurements it is normally desired to assign the Reference Junction Temperature to AIM 16 Input Channel INO To configure this install two jumpers in selection points labeled TMP These points are located near the Input Channel INO Do not connect any other input or sensor to channel INO and do not install break detection shorts BO or RTD Sensor Selection shorts See Thermocouple Break Detect Selection and RTD Sensor Selection sections If you desire to assign the Reference Junction Temperature directly to an AD12 8 input channel instead of AIM 16 channel INO install a jumper in a selection point labelled through OT7 OT stands for output temperature However remember that if you do this this AD12 8 input channel used must not be used for any other input by this or any other card in the system Thermocouple Break Detect Selection If you wish to use the break detect feature for a given input channel it is necessary to install shorts in t
6. warranty 15 defined as any use to which the equipment is exposed other than that use specified or intended as evidenced by purchase or sales representation Other than the above no other warranty expressed or implied shall apply to any and all such equipment furnished or sold by ACCES Page iv Table of Contents jore EC iii Warranty 5699993999 ri DI c Bowel oU E ENDE ore ee iv Chapter 1 Introductio ri o cto E EE u E tots 1 1 SPECIHICAtONS x du eat ARA n ee TR RO ere e re e e 1 2 Chapter 2 2 1 CI InstallatiQD za x e M ee ap teem E erui 2 1 3 5 Inch Diskette 2 1 Directories Created on the Hard 2 2 Installation of the 16 2 4 Option Selection 2 7 Selections s sata er er Re A DEN La ERO ee es 2 7 Channel 2 9 vs av RUE 2 9 RTD Sensor 2 10 Power Supply 2 10 Cal
7. Level Analog Ground 16 01 1 AIM 16 Manual 34 35 Chl 2 Analog Output 36 37 CH1 IN Chl 1 Analog Output CHO IN Chl 0 Analog Output Table A 1 Connector Pin Assignments Page A 2 Manual MAIM 16 D1e Customer Comments If you experience any problems with this manual or just want to give us some feedback please email us at manuals accesio com Please detail any errors you find and include your mailing address so that we can send you any manual updates ya ACCES 1 0 PRODUCTS INC 10623 Roselle Street San Diego CA 92121 Tel 858 550 9559 FAX 858 550 7322 www accesio com
8. annel of the AD12 8 Use the arrow key to select option 6 Calibrate MUX then press the ENTER key Now select which AIM 16 to calibrate and press ENTER You will be presented with an initial setup for the AIM 16 ensure that your card is set this way then press ENTER HB Wb 6 Use the arrow key to select option 1 Adjust RP3 from the menu at the top left hand corner of the screen 7 Following the instructions on the screen perform the RP3 adjustment 8 Repeat steps 6 and 7 for 4 RP2 and 5 9 This completes the calibration procedure Page 2 12 Manual MAIM 16 D1e Chapter 3 Software The AIM 16 does not have software included with it as software for a system is largely dependent upon the A D card used The AD12 8 A D card has a full range of software included with it that includes support for the AIM 16 as follows See Directories Created on the Hard Disk in the Installation section for a complete software description Drivers Hardware drivers included with the AD12 8 are designed to use the advanced features ofthe AIM 16 such as programmable gains and on board reference junction compensation The drivers support C Pascal QuickBASIC and interpreted BASIC In addition a driver is provided in DLL form for Windows applications The driver also supports a point list which allows assignment of point addresses with gain in any order desired This allows A D points in the system to be scanned in any order
9. ase directory containing the SETUP EXE setup program used to help you configure jumpers and calibrate the card DOS PSAMPLES A subdirectory of CARDNAME that contains Pascal samples DOS CSAMPLES A subdirectory of CARDNAME that contains C samples Win32Manguage Subdirectories containing samples for Win95 98 and NT WinRisc exe A Windows dumb terminal type communication program designed for RS422 485 operation Used primarily with Remote Data Acquisition Pods and our RS422 485 serial communication product line Can be used to say hello to an installed modem ACCES32 This directory contains the Windows 95 98 NT driver used to provide access to the hardware registers when writing 32 bit Windows software Several samples are provided in a variety of languages to demonstrate how to use this driver The DLL provides four functions InPortB OutPortB InPort and OutPort to access the hardware This directory also contains the device driver for Windows NT ACCESNT SYS This device driver provides register level hardware access in Windows NT Two methods of using the driver are available through ACCES32 DLL recommended and through the DevicelOControl handles provided by ACCESNT SYS slightly faster Page 2 2 Manual MAIM 16 D1e SAMPLES Samples for using ACCES32 DLL are provided in this directory Using this DLL not only makes the hardware programming easier MUCH easier but also one source file can be used for both Windows 95 98 and Wi
10. atory or office conditions six months to a year is acceptable A 4 1 2 digit digital multimeter is required as a minimum to perform satisfactory calibration Also a voltage calibrator or a stable noise free DC voltage source that can be used in conjunction with the digital multimeter is required Calibration 1s performed using the SETMUX program supplied with the AD12 8 This program will lead you through the set up and calibration procedure with prompts and graphic displays that show the settings and adjustment trim pots This calibration program also serves as a useful test of the AIM 16 functions and can aid in troubleshooting if problems arise Calibration Procedure The AIM 16 card has five potentiometers RP1 through 5 which are used for calibration These potentiometers have the following functions sets an output offset of the programmable gain amplifier U13 to zero RP2 sets an input offset of the programmable gain amplifier U13 to zero sets the level of the 10V regulated supply 4 sets the output of the local reference junction temperature sensor RP5 is a fine gain adjust and provides precise gain setting capability mo The following procedure is brief and is intended for use in conjunction with the calibration part of the SETMUX program 1 Start the calibration program by typing SETMUX and press the ENTER key at the DOS prompt Use the relevant menu selection to assign your AIM 16 to a ch
11. c ACCES I O PRODUCTS INC 10623 Roselle Street San Diego CA 92121 TEL 858 550 9559 FAX 858 550 7322 www accesio com WWW acces io MODEL AIM 16 USER MANUAL FILE MAIM 16 D1e Notice The information in this document is provided for reference only ACCES does not assume any liability arising out of the application or use of the information or products described herein This document may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of ACCES nor the rights of others IBM PC PC XT and PC AT are registered trademarks ofthe International Business Machines Corporation Printed in USA Copyright 1995 by ACCES V O Products Inc 10623 Roselle Street San Diego CA 92121 rights reserved Page iii Warranty Prior to shipment ACCES equipment is thoroughly inspected and tested to applicable specifications However should equipment failure occur ACCES assures its customers that prompt service and support will be available All equipment originally manufactured by ACCES which is found to be defective will be repaired or replaced subject to the following considerations Terms and Conditions If aunit is suspected of failure contact ACCES Customer Service department Be prepared to give the unit model number serial number and a description of the failure symptom s We may suggest some simple tests to confirm the failure We will assign a Re
12. ction and three digital input lines are used for gain selection Gains may be selected by software or manually by switch When selected manually the gain setting chosen applies to all input channels Software included with model AD12 8 analog to digital converter facilitates interface to the AIM 16 That software includes setup programs drivers and sample programs Read sections Installation and Software for more details The AIM 16 card may be used as part of a large data acquisition system A system may comprise one to eight of these cards all interconnected on the same output bus because each card has two parallel input output connectors For thermocouple measurements each card may provide it s own reference junction compensation at input INO by using jumpers marked TMP as described in Installation Also for thermocouple applications a break detect circuit is activated by installation of a pair of shorts for each thermocouple input channel Option P consists of a DC DC converter which operates from the 5VDC computer power supply and provides isolated 15 for use by the analog circuits on AIM 16 This option is particularly useful if the 12VDC computer power is noisy and or is marginally low Model AIM 161 has current sensing resistors installed for use in 4 20mA applications Further it has also been modified so that maximum resolution is provided at the A D converter The modifications that are made include introduction of
13. ctor Environmental e Operating Temp 0 C to 65 C Storage Temp 40 C to 100 C Humidity 0 to 9095 RH non condensing Size 8 0 inches long 4 75 inches wide 0 75 inches high e Power Required 5VDC 20mA typical with option P DC to DC converter 5VDC 125mA max 12VDC 10mA typical I2VDC 10mA typical Page 1 2 Manual MAIM 16 D1e o gt gt 011 012 o gt 013 o gt 014 015 o gt 016 o gt 017 GAIN G1 INO CTL 9 G2 gt 0 o gt OV1 2 DIFFERENTIAL INPUTS 4 MUX o gt OV5 o gt 096 o gt 07 5 O 0 CHL O 1 SELECT O A2 O A3 Figure 1 1 AIM 16 Block Diagram Manual MAIM 16 D1e Page 1 3 AIM 16 Manual Page 1 4 Manual MAIM 16 D1e Chapter 2 Installation The software provided with this card 15 contained on either one CD or multiple diskettes and must be installed onto your hard disk prior to use To do this perform the following steps as appropriate for your software format and operating system Substitute the appropriate drive letter for your CD ROM or disk drive where you see d or a respectively in the examples below CD Installation DOS WIN3 x a Place the CD into your CD ROM drive b Type 21 1 to change the active drive to the CD ROM drive C Type to run the install program d Follow t
14. ded at the sensor end Three wire RTD connections can be made as follows connect RTD wires V and I to the terminal on the AIM 16 connect RTD wire V to the terminal and connect RTD wire I to the GND terminal To assure that there is minimum susceptibility to EMI proper EMI cabling techniques twisted pair wiring and in extreme cases shielded wiring must be used on input wiring If the precision 10V reference voltage from the A D converter is to be used by external circuits make connections to the two position screw terminal labeled REF OUT Then connect a cable between the 37 pin connector on the card and the A D converter As many as eight AIM 16 cards or 128 channels may be serviced by one analog to digital converter card The AIM 16 cards in the system are daisy chained together by 37 conductor ribbon cables plugged on each card to two parallel 37 pin Sub D connectors The address of the AIM 16 card 15 established by selecting an output channel via a jumper installed at location OVO to OV7 The ribbon cable that interconnects AIM 16 to the AD12 8 also provides computer power via the AD12 8 to the AIM 16 If Option P is installed on your AIM 16 s 5V computer power is used by that option to generate isolated 1 5 for the analog circuits on AIM 16 Otherwise 12V computer power 15 used Since each AIM 16 can draw up to 125mA of current when Option P 15 installed itis desirable to keep the total cable length from the A D
15. g up the card The program uses a menu and illustrations to make it easy to select jumper and switch choices For further information on this program see Software If it is necessary to reconfigure a card it is important to remove any jumper short or current resistor not required by the new configuration Output Range A switch labeled G 2 Switch 1 of DIP switch S1 selects the full scale output ofthe AIM 16 board and divides the overall gain by two When G 2 is on the maximum usable output of AIM 16 is 5 Gain Selection The AIM 16 may be operated in the programmable gain mode the manual gain mode or a combination of the two The following sections detail the setup for each mode cf AIM 16 Gain Table lists the switch positions and resulting gains Programmable Gain Mode To select the Programmable Gain Mode of operation the following switch settings are required Switches GP1 2 Switches GM2OFF In this mode gains are determined by the state of digital inputs GO Gl and G2 at I O connector pins 3 5 and 6 respectively By manipulating the digital input bits from software gains may be programmed on a channel by channel basis See AIM 16 Gain Table for the states of GO G1 and G2 required for the desired gain Manual Gain Mode To select the Manual Gain Mode of operation the following switch settings are required Switches GP1 GP2OFF Switches GM0 GM1 GM2Depending on gain In t
16. he on screen prompts to install the software for this card WIN95 98 NT a Place the CD into your CD ROM drive b The CD should automatically run the install program after 30 seconds Ifthe install program does not run click START RUN and type d install click OK or press Follow the on screen prompts to install the software for this card 3 5 Inch Diskette Installation As with any software package you should make backup copies for everyday use and store your original master diskettes in a safe location The easiest way to make a backup copy is to use the DOS DISKCOPY utihty In a single drive system the command is BUSKEN ck odes You will need to swap disks as requested by the system In a two disk system the command is BUSKEN ck Eile This will copy the contents of the master disk in drive A to the backup disk in drive B Manual MAIM 16 D1e Page 2 1 AIM 16 Manual To copy the files on the master diskette to your hard disk perform the following steps a Place the master diskette into a floppy drive b Change the active drive to the drive that has the diskette installed For example if the diskette is in drive A type C Type and follow the on screen prompts Directories Created on the Hard Disk The installation process will create several directories on your hard disk If you accept the installation defaults the following structure will exist CARDNAME Root or b
17. his mode gains are determined by the position of switches GM1 and GM2 See AIM 16 Gain Table for the positions of GM0 GM1 and GM2 required for the desired gain Manual MAIM 16 D1e Page 2 7 AIM 16 Manual Combination of Gain Mode In instances where less than three digital input control lines are available for setting programmable gains a combination of manual and programmable gain may be used One programmable line gives selection of two gains two lines gives four available gains and three the entire eight The switch locations marked GP1 and GP2 correspond to digital input bits GO and G2 respectively Any of the digital input bits that are not software supported should have the corresponding GP switch set to OFF The corresponding GM switch should be set ON or OFF as desired For example if only digital inputs GO and are available switch GP2 would be set OFF If GM2 is set to ON then gain codes 0 1 2 3 would be available as programmable gains and if 2 is set to OFF then gain codes 4 5 6 7 would be available as programmable gains See AIM 16 Gain Table for other combinations AIM 16 Gain Mode Programmable Gains Manual Gains Gain G GMI om c 1 OFF ON OFF 200 100 OFF OFF 1000 soo Table 2 1 AIM 16 Gain Table lz o o O ol oOo lo Page 2 8 Manual MAIM 16 D1e Channel Selection This
18. ibration and Test 2 12 Chapter 3 Software nn A Aa 3 1 DEV ox ome eate 3 1 Sample Programs zi asta Y Qt deua M bad 3 1 ee RR RR pepe es 3 1 Chapter 4 Sensor Interface 2 222220 e 4 1 Considerations for Thermocouples 4 1 Considerations for RTD 4 2 Considerations for Strain Gage 5 4 2 Considerations for Current 4 3 Considerations for Other Voltage 4 3 Appendix A Cabling and Connector Information A 1 Input Connector Pin 510 A 1 Page v List of Figures Figure 1 1 AIM 16 Block 1 3 Figure 2 1 Use of CAB 37Y Cables 2 6 Figure 2 2 AIM 16 Option Selection Map 2 11 List of Tables Table 2 1 AIM 16 Gain Table uns BE eee Ri 2 8 Table A 1 Connector Pin A 2 Page vi Chapter 1 Introd
19. ing to program or set up the AIM 16 the overall system of which the AIM 16 is a part should be defined The AIM 16 provides the system s interface to the various sensors which supply data We suggest that you make a list of sensors by type and location Where practical sensors of one type should be grouped on the AIM 16 card to simplify programming Considerations for Thermocouples It is important that the junction temperature from each card be used in computing the temperature measured by each thermocouple serviced by that card In order to minimize errors the junction temperature sensor is physically located at a place central to all thermocouple connections The junction temperature sensor input 1s normally jumpered to input channel INO of each card A selection of Gain is suggested for that channel as it will produce nominal 24 4 mV C If the AIM 16 is not enclosed e g in ACCES T Box then care should be taken that there is not air blowing across the AIM 16 Moving air can cause a small temperature differential which results in a reference junction error A total of eight AIM 16 cards per system may be used with an AD12 8 Thus up to 120 thermocouple inputs can be accommodated Eight analog input channels used for reference junction overhead An open thermocouple or break detect signal 1s available and may be activated by installing two shorts at each channel where break detect is desired Break detect short locations are label
20. ired to accommodate live zero On the AIM 161 standard 200 ohm 0 1 resistors are used in place of 250 ohm resistors This would yield 2 496V to 12 48V after amplification An offset is applied and the net output is 5 004V to 4 980V The amplifier gain is adjusted slightly with gain adjust pot RP5 to compensate for the fact that 200 ohms is slightly low Considerations for Other Voltage Inputs The input voltage to AIM 16 should be within a range of 10V Any gain selected should allow the output to stay within the full scale range of the host analog to digital converter If you know that the input voltage falls within those limits but don t know exactly what it is software controlled auto ranging capability is available via the gain curve setup routine provided with the AD12 8 setup software Manual MAIM 16 D1e Page 4 3 AIM 16 Manual Page 4 4 Manual MAIM 16 D1e Appendix A Cabling and Connector Information Input Connector Pin Assignments Connections are made to the AIM 16 card via a 37 pin D type connector The female mating connector can be a Cannon DC 37S for soldered connections Alternatively insulation displacement flat cable types such as AMP 745242 1 may be used 12VDC Power from the Computer Bus V EF M2 O E G2 0 1 2 3 E E PT E Poe LSB sub multiplexer channel select LL GND Low
21. led B1 through 16 For example install two shorts at the two locations labelled B2 in order to enable the break detect feature for channel 2 Now when an open or missing thermocouple is detected a full scale negative output will be provided on channel 2 A jumper should be installed in the STD position ofthe programming point labeled OFST STD The OFFSET feature is used for RTDs for 4 20mA current measurement and other current measurements This feature will be discussed under appropriate paragraphs on the following pages Manual MAIM 16 D1e Page 4 1 AIM 16 Manual Considerations for RTD Sensors Three wire connection may be applied to an RTD sensor by adding two shorts per channel for each sensor served The locations for these shorts are labelled RO through R15 For example install two shorts in the two locations labeled R2 if an RTD sensor is used at channel 2 For extended range and resolution of measurements it is common practice in RTD processing to Offset the sensor output in a negative direction The AIM 16 allows a negative 10V offset so that a Zero input to a channel provides a 10V output In order to enable this feature install a jumper in the OFST position of the programming point labeled OFST STD and place the DIP switch labeled OSH in the ON position If the host A to D card is rated at 5V full scale install the OFST STD jumper as above but place the OSH switch in the OFF position This will reduce the offset to 5V
22. ndowsNT One executable can run under both operating systems and still have full access to the hardware registers The DLL is used exactly like any other DLL so it is compatible with any language capable of using 32 bit DLLs Consult the manuals provided with your language s compiler for information on using DLLs in your specific environment VBACCES This directory contains sixteen bit DLL drivers for use with VisualBASIC 3 0 and Windows 3 1 only These drivers provide four functions similar to the ACCES32 DLL However this DLL is only compatible with 16 bit executables Migration from 16 bit to 32 bit 1s simplified because of the similarity between VBACCES and ACCES32 PCI This directory contains PCI bus specific programs and information If you are not using a PCI card this directory will not be installed SOURCE A utility program is provided with source code you can use to determine allocated resources at run time from your own programs in DOS PCIFind exe A utility for DOS and Windows to determine what base addresses and IRQs are allocated to installed PCI cards This program runs two versions depending on the operating system Windows 95 98 NT displays a interface and modifies the registry When run from DOS or Windows3 x a text interface is used For information about the format of the registry key consult the card specific samples provided with the hardware In Windows NT NTioPCI SYS runs each time the computer is booted
23. ovision it is only necessary to install a resistor of the proper value and set the gain appropriately for each channel to be used for current input When all inputs are designated for sensing 4 20mA current it is beneficial to increase resolution by providing offset To accomplish this install a jumper in the OFST position of the programming point labelled OFST STD Alternatively if the A D card operates on 10V range set DIP switch 2 on i e OSH offset high position If the AIM 16 that you have is model AIM 161 then it already has the current sensing resistors installed Further it has also been modified so that maximum resolution is provided at the A D converter The modifications that are made include introduction of an offset and addition of a gain adjustment pot To better understand the modifications consider the following If the A D converter input range is 5V the AIM 16 amplifier gain is 1 and a 250 ohm resistor is used then 4 20mA current input would yield voltages of 1V to 5V at the AIM 16 output Only 40 of the A D converter range would be used To accomplish better resolution it is necessary to introduce an offset and amplifier gain For example if a 5V offset is introduced and the amplifier gain is increased to 2 then the output would be 3V to 5V But that is still only 80 of the A D converter s range So to cover the full range and thus realize maximum resolution an additional offset 1s requ
24. thereby refreshing the registry as PCI hardware is added or removed In Windows 95 98 NT PCIFind EXE places itselfin the boot sequence ofthe OS to refresh the registry on each power up This program also provides some COM configuration when used with PCI COM ports Specifically it will configure compatible COM cards for IRQ sharing and multiple port issues WIN32IRQ This directory provides a generic interface for IRQ handling in Windows 95 98 NT Source code is provided for the driver greatly simplifying the creation of custom drivers for specific needs Samples are provided to demonstrate the use of the generic driver Note that the use of IRQs in near real time data acquisition programs requires multi threaded application programming techniques and must be considered an intermediate to advanced programming topic Delphi C Builder and Visual C samples are provided Manual MAIM 16 D1e Page 2 3 AIM 16 Manual Findbase exe DOS utility to determine an available base address for ISA bus non Plug n Play cards Run this program once before the hardware 1s installed in the computer to determine an available address to give the card Once the address has been determined run the setup program provided with the hardware to see instructions on setting the address switch and various option selections Poly exe A generic utility to convert a table of data into an nth order polynomial Useful for calculating linearization polynomial coefficients
25. to the furthest AIM 16 as short as possible You can tell if Option P is installed on your AIM 16 s by looking at the lower left quadrant of the board If Option P is not installed then there will be components absent in that area If long cable length is required you can use an external 5V DC power supply and locate it close to the AIM 16 to be powered This of course will necessitate disconnecting the 5VDC computer power Also if Option P is included on your card it is desirable to have no more than three AIM 16s in any one chain particularly if the REF OUT voltage is to be used as excitation for sensors For applications where multiple AIM 16s are to be used CAB37 18Y cables can be used That cable provides ability to branch to two other AIM 16s For example consider the case where five AIM 16s are needed In this case two CAB37 18Y and one CAB37 18 can be used as shown below Manual MAIM 16 D1e Page 2 5 AIM 16 Manual CAR37 18Y IBM PG ur 0 Compat ble CAB37 18Y Figure 2 1 Use of CAB 37Y Cables Page 2 6 Manual MAIM 16 D1e Option Selection AIM 16 options are selected either by the DIP switch for High Offset and Gain setup or by installing plug in jumpers or solder shunts between labeled points for other options Refer to Option Selection Map for the location of the jumper short and switch selections discussed below The SETMUX program included with AD12 8 is a special program to assist you in settin
26. turn Material Authorization RMA number which must appear on the outer label ofthe return package All units components should be properly packed for handling and returned with freight prepaid to the ACCES designated Service Center and will be returned to the customer s user s site freight prepaid and invoiced Coverage First Three Years Returned unit part will be repaired and or replaced at ACCES option with no charge for labor or parts not excluded by warranty Warranty commences with equipment shipment Following Years Throughout your equipment s lifetime ACCES stands ready to provide on site or in plant service at reasonable rates similar to those of other manufacturers in the industry Equipment Not Manufactured by ACCES Equipment provided but not manufactured by ACCES 15 warranted and will be repaired according to the terms and conditions of the respective equipment manufacturer s warranty General Under this Warranty liability of ACCES 15 limited to replacing repairing or issuing credit at ACCES discretion for any products which are proved to be defective during the warranty period In no case is ACCES liable for consequential or special damage arriving from use or misuse of our product The customer is responsible for all charges caused by modifications or additions to ACCES equipment not approved in writing by ACCES or if in ACCES opinion the equipment has been subjected to abnormal use Abnormal use for purposes of this
27. uction Analog Input Multiplexer Model AIM 16 is installed external to the computer The AIM 16 accepts preamplifies and multiplexes up to 16 analog input signals before passing them to an analog to digital converter typically located in an I O slot in a PC XT AT type host computer This allows direct sensor interface without jeopardizing the quality of gathered data The AIM 16 provides screw terminal terminations and input signal conditioning for a variety of sensors including thermocouples J K T E S R and B three wire RTDs both for 392 and 385 alpha and strain gages as well as DC voltage and current inputs For strain gage applications 10V at up to 220mA excitation voltage for the strain gages is provided by the ACCES Model AD12 8 analog to digital converter through the AIM 16 That excitation voltage is available at a 2 position screw terminal block labeled REF OUT An input when selected by the input multiplexer is filtered amplified and if required level shifted After this processing the signal is supplied to an output channel where it 1s passed to the analog to digital converter The A D converter digitizes the DC signal and presents it to the computer CPU for further processing and or display A major feature of this card is that it can be used with mixed range analog inputs The AIM 16 provides extensive programming flexibility for both hardware and software configuration Four digital input lines are used for channel sele
28. wo selection points both labeled B n where n is the AIM 16 input channel number These points are located near the appropriate channel input Use this selection only for thermocouple inputs With the shorts installed an open thermocouple condition will cause a full scale negative voltage output on that channel Current Inputs If 4 20mA or other current inputs are to be used Resistors may be added to points labeled IR1 IR16 on the AIM 16 card Please see Sensor Interface Considerations for Current Inputs for more information Manual MAIM 16 D1e Page 2 9 AIM 16 Manual RTD Sensor Selection To configure a channel for RTD operation install shorts in two selection points both labeled R n where n is the channel number These points are all located near the edge of the board furthest from the connectors in the screw terminal input area RTD Output Offset For a board dedicated to RTD sensors a negative output offset may be selected by installing a jumper in the OFST position of the programming point labeled OFST STD This option is used in cases where you wish to extend the range of an RTD channel If this feature is used then the DIP switch S1 position labeled OSH determines the amount of the offset With OSH set ON the offset 15 10V and with OSH set OFF the offset 15 5V See the Considerations for RTD Sensors section in Sensor Interface of this manual for further information on using RTD sensors Power Supply Selection If
29. you have ordered an AIM 16 with the P option AIM 16P there are two power supply jumpers These are labelled VS and VS On the AIM 16P the jumpers are installed in the 15V and 15V positions Moving these jumpers to the 12V and the 12V positions disables the on board power supply and connects the power supplied at the external I O connector for VS and pin 20 for VS The maximum allowable external voltage 18V It is mandatory that only a single VS and a single VS jumper be used When an AIM 16 is purchased without the P option two shorts are soldered at the 12 and 12 positions Page 2 10 Manual MAIM 16 D1e ZL SAtSL 77615 15360 9 330 AIM 16 Option Selection 2 Figure 2 Page 2 11 Manual MAIM 16 D1e AIM 16 Manual Calibration and Test ACCES cards are calibrated prior to shipment However periodic calibration of AIM 16 is recommended to retain full accuracy The calibration interval depends to a large extent on the type of service that the card is subjected to For environments where there are frequent large changes of temperature and or vibration a three month interval is suggested For labor
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