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Page 3 DAS-1800ST/HR Series User’s Guide A G R E A T E R M E A S U R E O F C O N F I D E N C E Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com Artisan Technology Group - Quality Instrumentation ...
Page 4 Hardware Keithley Instruments, Inc. warrants that, for a period of one (1) year from the date of shipment (3 years for Models 2000, 2001, 2002, 2010 and 2700), the Keithley Hardware product will be free from defects in materials or workmanship. This warranty will be honored provided the defect has not been caused by use of the Keithley Hardware not in accordance with the instructions for the product.
Page 5 EXCEPT FOR THE EXPRESS WARRANTIES ABOVE KEITHLEY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANT- ABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEITHLEY DISCLAIMS ALL WARRANTIES WITH RESPECT TO THE OTHER HARDWARE AND OTHER SOFTWARE.
Page 6 DAS-1800ST/HR Series User’s Guide Revision H - June 2002 Part Number: 90090 Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
Page 7 All other brand and product names are trademarks or registered trademarks of their respective companies. Copyright © Keithley Instruments, Inc., 1999, 1996, 1995, 1994. All rights reserved. Reproduction or adaptation of any part of this documentation beyond that permitted by Section 117 of the 1979 United States Copyright Act without permission of the Copyright owner is unlawful.
Page 8 Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most mea- surement, control, and data I/O signals are Installation Category I and must not be directly connected to mains voltage or to voltage sources with high transient over-voltages.
Page 9 (Note that selected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product.) If you are unsure about the applicability of a replacement component, call a Keithley Instruments ofﬁce for information.
Page 10: Table Of Contents
Table of Contents Preface Overview Supporting Software ........1-3 Accessories .
Page 11 Setup and Installation Unwrapping and Inspecting Your Board ....3-1 Installing the Software ....... . . 3-2 Installing the DAS-1800ST/HR Series Standard Software Package .
Page 12 Troubleshooting Problem Isolation ........7-1 Using the DriverLINX Event Viewer .
Page 13 Analog Input Subsystem ......C-8 Analog Input Initialization ......C-8 Internal Clocking.
Page 14 List of Figures Figure 2-1. Block Diagram of Basic DAS-1800ST/HR Series Boards ......2-2 Figure 2-2.
Page 15 Unipolar and Bipolar Modes ....2-9 Table 2-3. Maximum Throughput for DAS-1800ST Series Boards (Bipolar Mode - Fixed Gain)..2-11 Table 2-4.
Page 16 Troubleshooting Information....7-3 Table A-1. Analog Input Specifications for DAS-1800ST Series..... . . A-1 Table A-2. Analog Input Specifications for DAS-1800HR Series .
Page 17: Preface
Preface This guide is intended to help you understand the installation, interface requirements, functions, and operation of the DAS-1801ST, DAS-1802ST, DAS-1802HR boards and their D/A (digital-to-analog) versions, the DAS-1801ST-DA, DAS-1802ST-DA, and DAS-1802HR-DA. Unless this guide refers speciﬁcally to one of these boards, the guide refers to all boards collectively as the DAS-1800ST/HR Series boards.
Page 18 Section 5 brieﬂy describes the DriverLINX Analog I/O program and Test program. Section 6 describes calibration requirements and gives instructions for starting the DriverLINX calibration program. Section 7 contains information on isolating and determining the source of operating problems. This section also contains instructions for obtaining technical support.
Page 19: Overview
256 analog input channels using expansion accessories. Channels are individually software-conﬁgurable for gain. DAS-1800ST Series boards acquire data at up to 333 ksamples/s and 12-bit resolution. Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com...
Page 20 Burst-mode data acquisition emulates simultaneous-sample-and-hold (SSH) capability. The DAS-1800ST Series boards support external SSH hardware; DAS-1800ST Series boards support EXP-1800 expansion accessories operated at gains of 1 and 50, while DAS-1802HR boards support EXP-1800 accessories at a gain of one only.
Page 21: Supporting Software
Supporting Software The following software for DAS-1800ST/HR Series boards supports all currently available DAS-1800 Series boards: DAS-1800ST/HR Series standard software package — Shipped with DAS-1800ST/HR Series boards. Includes DriverLINX for Microsoft Windows 95/98 or Windows NT and function libraries for writing application programs under Windows in a high-level language such as Microsoft Visual C++, Microsoft Visual Basic, Borland Delphi support ﬁles, LabVIEW, utility programs, and...
Page 22: Accessories
RMT-02 — Rack mount enclosure for the STA-1800U accessory. SSH-8 — An 8-channel, 12-bit, simultaneous sample-and-hold accessory for DAS-1800ST Series boards. Refer to the SSH-8 User’s Guide for more information. MB Series modules and MB01/02 backplanes — Plug-in, isolated, signal-conditioning modules and backplanes.
Page 23 C-2600 — A 24-inch cable for connecting an STA-1800U to an MB02 signal-conditioning backplane. CDAS-2000 Series — The CDAS-2000 is a 24-inch ribbon cable for connecting a DAS-1800ST/HR Series board to an STA-1800U, an STP-50, or an EXP-1800. The CDAS-2000/S is a 24-inch shielded version of the CDAS-2000;...
Page 24: Functional Description
Functional Description This section describes the features of the analog input, analog output (when applicable) and digital I/O sections of the DAS-1800ST/HR Series boards. The intent of these descriptions is to familiarize you with the operating options and to enable you to make the best use of your board. The block diagram in Figure 2-1 represents the basic DAS-1800ST/HR Series boards.
Page 25 Local Control Bus Functional Description Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 27 Local Control Bus Functional Description Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
Page 28: Analog Input Features
Analog Input Features The analog input section of DAS-1800ST/HR Series boards multiplexes all the active input channels (up to 16 single-ended or eight differential) down to a single, sampling ADC (analog-to-digital converter). Sampling resolution of the ADC is 12 bits (one part in 4096) for DAS-1800ST Series boards and 16 bits (one part in 65,536) for DAS-1802HR boards.
Page 29: Low-Side Reference Selection For Single-Ended Inputs
Low-Side Reference Selection for Single-Ended Inputs When you use single-ended inputs, you have two ways of connecting the low side of the ampliﬁer: the analog ground (default) and a user-deﬁned common mode. The two schemes differ in how the low side of the instrumentation ampliﬁer is connected.
Page 30: Channel-Gain Selection
DAS-1800ST/HR Series boards use positive magnitude to represent unipolar input signals and 2’s complement for bipolar input signals. In a given input range with the same peak voltage capacity for both modes, the unipolar mode doubles the converter’s resolution. Channel-Gain Selection DAS-1800ST/HR Series boards offer up to 16 single-ended or eight differential onboard analog input channels.
Page 31: Multiplexer Control Lines Mux 4 To Mux 7
Sampling sequences and gain settings for all expansion channels are communicated through the control lines described in the following two sections. Multiplexer Control Lines MUX 4 to MUX 7 Multiplexer lines MUX 4 to MUX 7 control the channel sequencing of EXP-1800 expansion accessories and MB02 backplanes.
Page 32: Maximum Achievable Throughput Rates
Table 2-2. DAS-1802ST/HR Input Gains and Ranges for Unipolar and Bipolar Modes Gain Unipolar Range Bipolar Range − 10 to +10V 0.0 to +10.0V − 5.0 to +5.0V 0.0 to +5.0V − 2.5 to + 2.5V 0 to 2.5V − 1.25 to +1.25V 0 to 1.25V Maximum Achievable Throughput Rates Because you can change input ranges on a per-channel basis, throughput...
Page 33 You must give special consideration to the direct measurement of low-level signals with the DAS-1801ST board. When using the ±20mV, 0 to 20mV, ±100mV, or 0 to 100mV ranges, measurement throughput drops for two reasons: The ampliﬁer cannot settle quickly enough (particularly the ±20mV and 0 to 20mV ranges).
Page 34: Table 2-3. Maximum Throughput For Das-1800St Series Boards (Bipolar Mode - Fixed Gain)
On DAS-1800ST Series boards, the maximum throughput for sampling one channel at any gain is 333 ksamples/s. The throughput for channel-to-channel sampling with ﬁxed gain in bipolar mode (0.024% maximum error) is shown in Table 2-3. Table 2-3. Maximum Throughput for DAS-1800ST Series...
Page 35: Table 2-5. Maximum Throughput For Das-1801St Boards (Bipolar Mode - Change Of Gain)
The maximum throughput for a DAS-1801ST board, operating in bipolar mode and having less than 1 LSB of error when driven from an ideal voltage source, is shown in Table 2-5. Table 2-5. Maximum Throughput for DAS-1801ST Boards (Bipolar Mode - Change of Gain) Maximum Throughput To ±5.0V To ±1.0V...
Page 36: Table 2-7. Maximum Throughput For Das-1802St Boards (Bipolar Mode - Change Of Gain)
The maximum throughput for a DAS-1802ST board, operating in bipolar mode and having less than 1 LSB of error when driven from an ideal voltage source, is shown in Table 2-7. Table 2-7. Maximum Throughput for DAS-1802ST Boards (Bipolar Mode - Change of Gain) Maximum Throughput To ±10.0V To ±5.0V...
Page 37: Table 2-9. Maximum Throughput For Das-1802Hr Boards (Bipolar Mode - Change Of Gain)
On DAS-1802HR boards, the maximum throughput for single-channel operation is 100 ksamples/s. The maximum throughput for a DAS-1802HR board, operating in bipolar mode and having less than 2 LSBs of error when driven from an ideal voltage source, is shown in Table 2-9.
Page 38: Data Conversion Modes
Data Conversion Modes DAS-1800ST/HR Series boards support three modes of data conversion: paced, burst, and burst with SSH. The data conversion modes are described as follows: Paced mode — Paced mode is best-suited for continuous scanning of channels at a constant rate. In the paced mode, the conversion rate equals the pacer clock rate.
Page 39: Clock Sources
5MHz time base. The onboard pacer clock uses two cascaded counters of the 82C54. The maximum allowable rate is 333kHz for DAS-1800ST Series boards and 100kHz for the DAS-1802HR; the minimum available rate is 0.0012Hz. When not used to pace the...
Page 40: Burst Mode Conversion Clock
The burst mode conversion clock frequency is programmable for a range of 15.625kHz to 333kHz (64µs to 3µs in 1µs increments) for the DAS-1800ST Series boards and 15.625kHz to 100kHz (64µs to 10µs in 1µs increments) for the DAS-1800HR Series boards.
Page 41: Triggers
Triggers A trigger starts or stops an interrupt-mode or DMA-mode analog input operation. An operation can use either one or two triggers. Every operation must have a start trigger that marks the beginning of an operation. You can use an optional second trigger, the about trigger , to deﬁne when an operation stops.
Page 42: Figure 2-5. Enabling Conversions With A Software Trigger
delay shown between that point and startup of the onboard clock is less than 1µs. Figure 2-6 illustrates the enabling of conversions with a hardware trigger. Software enables Conversions begin with conversion process external source (programmed for negative edge) External clock source Internal clock source count count...
Page 43: Pre-Trigger Acquisition
The about trigger is always an external digital trigger. If you specify an about trigger, the operation stops when a speciﬁed number of samples has been acquired after the occurrence of the about-trigger event. As described in the following sections, the availability of the about trigger provides the capability to deﬁne operations that acquire data before a trigger event (pre-trigger acquisition), operations that acquire data about (before and after) a trigger event, and operations that acquire data after a...
Page 44: Figure 2-7. Hardware Gate
The way conversions are synchronized depends on whether you are using an internal or an external clock, as follows: With internal clocking — The 82C54 stops counting when the gate signal goes inactive. When the gate signal goes active, the 82C54 is reloaded with its initial count value and starts counting again;...
Page 45: Data Transfer Modes
Data Transfer Modes Using the provided software, you can transfer data from DAS-1800ST/HR Series boards to the computer using the following data transfer modes: Interrupt — You can program the board to generate an interrupt for events such as FIFO Half Full or FIFO Not Empty. FIFO Half Full occurs after the FIFO accumulates 512 A/D samples for transfer to computer memory.
Page 46: Analog Output Features
Analog Output Features DAS-1800ST-DA Series and DAS-1802HR-DA boards contain an analog output section. The following sections discuss the features of the analog output sections for each of these board types. DAS-1800ST-DA Series Boards The analog output section of a DAS-1800ST-DA Series board contains four 12-bit DACs.
Page 47: Using Digital Control Signal Dostb
Ω pull-up resistors to +5V; therefore, the inputs appear high (logic 1) with no signal connected. Using Digital Control Signal DOSTB DAS-1800ST/HR Series boards provide a strobe signal DOSTB (pin 19 of the main I/O connector or pin 37 of STA-1800U connectors J1 and J2) for the purpose of strobing data through the digital outputs and latching the data into a register in external equipment.
Page 48: Figure 2-9. Timing For The Tgout Signal
When using digital control signal TGIN as a gate, TGOUT behaves as shown in Figure 2-9b. Note that there is a delay of about 200ns between the active edge of TGIN and the starting edge of TGOUT. When using an internal trigger/gate, TGOUT behaves as shown in Figure 2-9c.
Page 49: Using Digital Control Signal Ssho
Using Digital Control Signal SSHO The SSHO digital control signal is normally generated by DAS-1800ST Series boards to accommodate external SSH hardware. The SSHO signal is initiated by either the onboard internal pacer clock or an external pacer clock. Characteristics of the SSHO signal when used for SSH hardware control are as follows: SSHO is normally low, signifying that the SSH hardware is in sample mode.
Page 50: Assigning An Interrupt
active edge External Clock 300ns typical SSHO a. SSHO with External Pacer Clock Internal Clock 300ns typical SSHO b. SSHO with Internal Pacer Clock Figure 2-10. Timing for SSHO Signal When Not Used for SSH Hardware Assigning an Interrupt Assign an interrupt level to a DAS-1800 Series board through the DriverLINX software conﬁguration (see “DriverLINX Conﬁguration Notes”...
Page 51: Power
If a DAS-1800 Series board is sharing an interrupt level with one or more other DAS-1800 Series boards and requests an interrupt, the DriverLINX software determines the source of the request by scanning each board until the interrupt request ﬂag is located. DriverLINX then signals the computer to respond accordingly.
Page 52: Setup And Installation
Setup and Installation This section describes inspection, software installation, conﬁguration, and hardware installation for DAS-1800ST/HR Series boards. Read this section before you attempt to install and use your board. Unwrapping and Inspecting Your Board After you remove the wrapped board from its outer shipping carton, proceed as follows: 1.
Page 53: Installing The Software
Important: DAS-1800ST/HR, read the DriverLINX Installation and Conﬁguration Guide and the Appendix F: Conﬁguration and Implementation Notes—for Keithley DAS-1800 manuals that are packaged with the DriverLINX software. They are accessed from the DriverLINX CD-ROM after you have installed Adobe Acrobat.
Page 54: Selecting The Driverlinx Components To Install
4. Determine whether your computer has sufﬁcient resources for the DAS-1800ST/HR board. 5. Determine whether your DAS-1800ST/HR board can use your computer’s free resources. 6. Set any jumpers/switches to conﬁgure the DAS-1800ST/HR board to use your computer’s free resources. 7. Set any other jumpers/switches to conﬁgure the DAS-1800ST/HR board the way you want it to operate.
Page 55 6. Open the manuals appropriate to the DAS-1800 installation and read them before installing your DAS-1800 board or conﬁguring DriverLINX: Installation and Conﬁguration Appendix F: Conﬁguration and Implementation Notes—for Keithley DAS-1800. DriverLINX Technical Reference Manual DriverLINX Analog I/O Programming Guide...
Page 56: Setting The Base Address
Setting the Base Address The base address switch on DAS-1800ST/HR Series boards is preset at the factory for a value of 300h (768 decimal). If this address appears to conﬂict with the address of another device in the computer (including another DAS-1800 Series board), you must reset the base address switch.
Page 57: Installing The Board
Installing the Board Installing or removing a board with the power ON can damage Caution: your computer. Use the following steps to install a DAS-1800ST/HR Series board in an accessory slot of your computer: 1. Turn power OFF to the computer and all attached equipment. 2.
Page 58: Table 3-1. I/O Address Map (000H To 3Ffh)
the interrupt and DMA channels used by the other hardware devices in your computer system. Table 3-1 lists I/O addresses commonly used by IBM PC/XT, AT, and compatible computers. Determine an even boundary of eight I/O addresses within the range of 000H to 3F8H that are not being used by another resource in your system (including another DAS-1800 Series board), and set the switches to the appropriate base address.
Page 59 Floppy disk controller #1 3F8H to 3FFH Serial port The Expansion Board Conﬁguration for Keithley DAS-1800 Series dialog in DriverLINX allows you to record the settings of your analog input multiplexers and enable the expansion channels. Make sure that the switch settings match the settings you deﬁne in DriverLINX.
Page 60 Series board and to verify that everything is properly installed and conﬁgured. 1. Start Windows as you normally would and select the Program Manager window. 2. Either select the “Learn DriverLINX” icon created when you installed DriverLINX or enter “<drive>:/DRVLNX/LEARNDL” in the Command Line edit box.
Page 61 You can use DriverLINX to verify board operation 1. To physically initialize the DAS-1800ST/HR, select Device/Initialize from the main menu in Learn DriverLINX. 2. The ﬁrst time the DAS-1800ST/HR is initialized, or after a conﬁguration change, DriverLINX runs a diagnostic program to verify the operation and accuracy of the conﬁguration settings.
Page 62: Cabling And Wiring
Cabling and Wiring This section describes the cabling and wiring required for attaching accessories and I/O lines to your DAS-1800ST/HR Series boards. To avoid electrical damage, turn off power to the computer and Caution: any attached accessories before making connections to your boards. Attaching an STA-1800U The STA-1800U screw terminal accessory is an interface for I/O connections to DAS-1800ST/HR Series boards.
Page 63: Figure 4-1. Connector Layout Of An Sta-1800U Accessory
Figure 4-1. Connector Layout of an STA-1800U Accessory To attach an STA-1800U to a DAS-1800ST/HR Series board, use a CDAS-2000 Series cable. Connect the cable from the main I/O connector of the DAS-1800ST/HR Series board to connector J1 of the STA-1800U, as shown in Figure 4-2.
Page 64: Figure 4-3. Pin Assignments For The Main I/O Connector Of A Das-1800St/Hr Series Board
Pin assignments for the main I/O connector of a DAS-1800ST/HR Series board are shown in Figure 4-3. (User Common Mode) U_CM MD - 01 26 - CH00 HI CH00 LO or CH08 HI - 02 27 - CH01 HI CH01 LO or CH09 HI - 03 28 - CH02 HI CH02 LO or CH10 HI - 04 29 - CH03 HI...
Page 65: Figure 4-4. Pin Assignments For Connectors J1 And J2
02 - CH00 HI (User Common Mode) U_CM MD - 01 04 - CH01 HI CH00 LO or CH08 HI - 03 06 - CH02 HI CH01 LO or CH09 HI - 05 08 - CH03 HI CH02 LO or CH10 HI - 07 10 - CH04 HI CH03 LO or CH11 HI - 09 12 - CH05 HI...
Page 66: Attaching An Stp-50
Attaching an STP-50 The STP-50 is a compact screw terminal panel that you cable to the main I/O connector of a DAS-1800ST/HR Series board using a CDAS-2000 Series cable, as shown in Figure 4-5. Pin assignments for the screw terminals of this panel are shown in Figure 4-6. STP-50 DAS-1800ST/HR Series Board Accessory...
Page 67: Attaching Ssh-8 Accessories
SSH-8 User’s Guide . This accessory can serve as a front-end analog interface for DAS-1800ST Series boards when connected through an STA-1800U. Note that attached SSH-8 accessories must be set as slaves. Attach an SSH-8 to a STA-1800U using a C-1800 cable, as shown in Figure 4-7.
Page 68: Attaching An Mb01 Backplane
Attaching an MB01 Backplane A DAS-1800ST/HR Series board conﬁgured for single-ended inputs accepts one MB01 backplane through an STA-1800U accessory. Cabling for attaching an MB01 backplane to an STA-1800U is shown in Figure 4-8. STA-1800U DAS-1800ST/HR Series Board CDAS-2000 or CDAS-2000/S Cable MB01...
Page 69: Figure 4-9. Attaching Mb02 Backplanes To An Sta-1800U Accessory
C-2600 MB02 Cable To J4 of the STA-1800U C-2600 MB02 Cable To J5 of the STA-1800U You can connect up to four MB02 backplanes to MB02 the STA-1800U C-2600 Cable To J6 of the STA-1800U MB02 C-2600 Cable To J7 of the STA-1800U Figure 4-9.
Page 70: Figure 4-10. Daisy-Chaining Sta-1800U Accessories With Attached Mb02 Backplanes
DAS-1800ST/HR Series Board CACC-2000 Cables To Next STA-1800U STA-1800U STA-1800U C-2600 Cables Figure 4-10. Daisy-Chaining STA-1800U Accessories with Attached MB02 Backplanes The jumper pad beside each STA-1800U receptacle (J4 to J7) selects the channel of a DAS-1800ST/HR Series board that the attached MB02 backplane is to use.
Page 71: Attaching Exp-1800 Expansion Accessories
Attaching EXP-1800 Expansion Accessories An EXP-1800 expansion accessory connects to the main I/O connector of a DAS-1800ST/HR Series board through a CDAS-2000 Series cable, as shown in Figure 4-11. To connect an additional EXP-1800, use a CAB-50 Series cable as shown in Figure 4-11. DAS-1800ST/HR Series Board EXP-1800...
Page 72: Connecting Signals
If you are using a DAS-1802HR or DAS-1802HR-DA board with Notes: an EXP-1800 expansion accessory, it is recommended that you use the EXP-1800 at a gain of 1 only; using the EXP-1800 at a gain of 50 can produce less than satisfactory resolution. If you are using a DAS-1802HR or DAS-1802HR-DA board, it is recommended that you use only one EXP-1800 expansion accessory;...
Page 73: Precautions For Using A Das-1801St Board At High Gains
Precautions for Using a DAS-1801ST Board at High Gains Operating a DAS-1801ST board at input gains of 50 or 250 can lead to problems if your application is unable to cope with noise. At a gain of µ 250, each bit of A/D output corresponds to 10 V of analog input.
Page 74: Connecting A Signal To A Single-Ended Analog Input
To prevent this problem, use the following precautions: Avoid direct connections to the AC line. Make sure all connections are tight and sound so that signal wires will not come loose and short to high voltages. Use isolation ampliﬁers where necessary. Connecting a Signal to a Single-Ended Analog Input Figure 4-12 shows the connections between a signal source and a channel of a DAS-1800ST/HR Series board conﬁgured for single-ended inputs.
Page 75: Connecting A Signal To A Differential Analog Input
Connecting a Signal to a Differential Analog Input Figure 4-13 shows three connection schemes for wiring a signal source to a channel of a DAS-1800ST/HR Series board conﬁgured for differential inputs. Channel n High DAS-1800ST/HR Floating Channel n Low Series Board Signal Source LL GND...
Page 76: Avoiding A Ground Loop Problem
The upper two circuits of the diagram illustrate ﬂoating signal source connections. (A ﬂoating signal source is a voltage source that has no connection with earth ground; the signal is not referenced to the third wire on a 3-wire AC line outlet.) Floating signal sources require the addition of resistors to provide a bias current return.
Page 77: Connecting Analog Output Signals
Figure 4-14 shows the proper way to connect a differential input to a grounded signal source. Make sure that Channel n Low is connected to ground at the signal source, not at the computer and make sure that you do not tie the two grounds together. Channel n High DAS-1800ST/HR Grounded...
Page 78: Connecting Digital I/O Signals
Connecting Digital I/O Signals DAS-1800ST/HR Series boards have four digital inputs and four digital outputs, as described in “Digital I/O Features” on page 2-23. Make your connections to the digital I/O terminals through corresponding terminals of the STA-1800U. The terminals are labeled as follows: Digital input —...
Page 79: Connecting And Synchronizing Multiple Boards
Connecting and Synchronizing Multiple Boards You can synchronize up to three DAS-1800 Series boards using trigger and gate signals from the main I/O connector. Each board can run at the same conversion rate as the other boards in the system or at a different conversion rate from other boards in the system.
Page 80 In scheme 2, you can start conversions in either of two ways: by a hardware trigger/gate input or by software. The board connections are in a master/slave relationship; board 0 is the master, and boards 1 and 2 are the slaves. If you use a software enable for board 0 of scheme 2, the board 0 pacer clock starts and triggers conversions in the slave boards.
Page 81: Testing The Board
Testing the Board This section describes how to use DriverLINX to test functions of DAS-1800ST/HR Series boards. DriverLINX Analog I/O Panel The DriverLINX Analog I/O Panel is an application that demonstrates analog input/output using DriverLINX. With the Analog I/O Panel you can: Analyze analog signals using the two-channel Oscilloscope.
Page 82: Test Panel Application
5. Select the Logical Device you want to operate by dragging the pointer in the Device Selection section. The Analog I/O Panel displays the Scope, Meter, SST, and Level control tabs, depending on the capabilities of your DAS-1800ST/HR board. 6. The Scope uses two analog input channels, referred to as ChA and ChB.
Page 83: Calibration
The equipment requirements for calibrating a DAS-1800ST/HR Series board are as follows: A digital voltmeter for the DAS-1800ST Series boards accurate to 6 digits, such as a Keithley Instruments Model 196. A digital voltmeter for the DAS-1800HR Series boards accurate to digits, such as a Keithley Instruments Model 2001.
Page 84: Potentiometers And Test Points
Potentiometers and Test Points Figure 6-1 shows the locations of the potentiometers and test points involved with the calibration of a basic DAS-1800ST/HR Series board. a. Basic DAS-1800ST Series Board b. Basic DAS-1802HR Board Figure 6-1. Potentiometers and Test Points on Basic...
Page 85: Figure 6-2. Potentiometers And Test Points On Das-1800St-Da/Hr-Da Series Boards
Figure 6-1 shows the locations of the potentiometers and test points involved with the calibration of a DAS-1800ST-DA Series or DAS-1802HR-DA board. a. DAS-1800ST-DA Series Board R32 R35 b. DAS-1802HR-DA Board Figure 6-2. Potentiometers and Test Points on DAS-1800ST-DA/HR-DA Series Boards Potentiometers and Test Points Artisan Scientific - Quality Instrumentation ...
Page 86: Driverlinx Calibration Utility
In both diagrams, the term RTI is Referred to Input . The calibration utility, described in the next section, directs you to these components and explains what to do with them during the calibration process. DriverLINX Calibration Utility DriverLINX Calibration Utility will guide you through the calibration procedure.
Page 87: Troubleshooting
Troubleshooting If your DAS-1800ST/HR Series board is not operating properly, use the information in this chapter to isolate the problem. If the problem appears serious enough to warrant technical support, refer to “Technical Support” on page 7-6 for information on how to contact an applications engineer. Problem Isolation If you encounter a problem with a DAS-1800ST/HR Series board, use the instructions in this section to isolate the cause of the problem before...
Page 88: Device Initialization Error Messages
Device Initialization Error Messages During device initialization, DriverLINX performs a thorough test of all possible subsystems on the DAS-1800ST/HR Series board as well as the computer interface. If DriverLINX detects any problems or unexpected responses, it reports an error message to help isolate the problem. The device initialization error messages fall into three basic categories: “Device not found”...
Page 89: Table 7-1. Troubleshooting Information
The board is incorrectly aligned Check the board for proper seating. in the accessory slot. The board is damaged. Contact Keithley for technical support; see page 7-6. Intermittent The most common cause of this Reduce I/O bus speed to a maximum of...
Page 90 Table 7-1. Troubleshooting Information (cont.) Symptom Possible Cause Possible Solution Data appears to be The most common cause of this Reduce I/O bus speed to a maximum of invalid problem is that the I/O bus speed 8MHz (to change the I/O bus speed, run is in excess of 8MHz.
Page 91: Testing The Board And Host Computer
I/O connections using the instructions in the next section. If you do not have another board, refer to the instructions on page 7-6 before calling Keithley for technical support. Problem Isolation Artisan Technology Group - Quality Instrumentation ...
Page 92: Testing The Accessory Slot And I/O Connections
6. If you cannot isolate the problem, refer to the next section for instructions on obtaining assistance. Technical Support Before returning any equipment for repair, call Keithley for technical support at: 1-888-KEITHLEY Monday - Friday, 8:00 a.m. - 5:00 p.m., Eastern Time Troubleshooting Artisan Technology Group - Quality Instrumentation ...
Page 93 An applications engineer will help you diagnose and resolve your problem over the telephone. Please make sure that you have the following information available before you call: DAS-1800ST/HR Model ___________________ Series Board Serial # ___________________ Conﬁguration Revision code ___________________ Base address setting ___________________ Interrupt level setting ___________________...
Page 94 If you are submitting your equipment for repair under warranty, Note: you must include the invoice number and date of purchase. To enable Keithley to respond as quickly as possible, you must include the RMA number on the outside of the package. Troubleshooting Artisan Technology Group - Quality Instrumentation ...
Page 95: Specifications
Speciﬁcations Tables A-1 to A-7 list speciﬁcations for the DAS-1800ST/HR Series boards. Table A-1. Analog Input Speciﬁcations for DAS-1800ST Series Feature DAS-1801ST/ST-DA DAS-1802ST/ST-DA Number of channels Software-selectable as 8 differential or 16 single-ended Input mode Software-selectable as unipolar or bipolar...
Page 96 Table A-1. Analog Input Speciﬁcations for DAS-1800ST Series (cont.) Feature DAS-1801ST/ST-DA DAS-1802ST/ST-DA Temperature coefﬁcient of accuracy (includes ADC) Offset • ±20µV/˚C ±(12µV/˚C ÷ gain) maximum for bipolar • ±20µV/˚C ±(14µV/˚C ÷ gain) maximum for unipolar Gain • ±20ppm/˚C for gain < 50 •...
Page 97 Table A-1. Analog Input Speciﬁcations for DAS-1800ST Series (cont.) Feature DAS-1801ST/ST-DA DAS-1802ST/ST-DA Interrupt levels 3, 5, 7, 10, 11, and 15 Minimum external pacer clock pulse width 10ns Maximum external pacer clock rate 333kHz Minimum hardware trigger pulse width 10ns Monotonicity is guaranteed over the operating range.
Page 98 Table A-2. Analog Input Speciﬁcations for DAS-1800HR Series (cont.) Feature DAS-1802HR/HR-DA Range/gain Unipolar • 0.0 to +10V for gain = 1 • 0.0 to +5.0V for gain = 2 • 0.0 to +2.5V for gain = 4 • 0.0 to 1.25V for gain = 8 Bipolar •...
Page 99 Table A-2. Analog Input Speciﬁcations for DAS-1800HR Series (cont.) Feature DAS-1802HR/HR-DA Dynamic parameters • Acquisition time: 2µs • Aperture delay: 6.0ns • Aperture uncertainty: - 100ps rms when used with internal pacer clock - 200ns maximum with external pacer clock •...
Page 100 Table A-2. Analog Input Speciﬁcations for DAS-1800HR Series (cont.) Feature DAS-1802HR/HR-DA Minimum external pacer clock pulse width 10ns Maximum external pacer clock rate 98kHz Minimum hardware trigger pulse width 10ns Triggering: Source • Internal clock, internal gate • Internal clock, external trigger (edge) •...
Page 101 Table A-3. Analog Output Speciﬁcations for DAS-1800ST-DA Series Attribute Speciﬁcation Resolution 12-bit (one part in 4096 or 224 ppm) Coding 12-bit 2’s complement, right justiﬁed −10.000V, +9.9951V Output range Integral non-linearity ± LSB typical, ± LSBs maximum Differential non-linearity ± LSB typical, ±1 LSB maximum Monotonicity 12 bits guaranteed...
Page 102 Table A-4. Analog Output Speciﬁcations for DAS-1802HR-DA (cont.) Attribute Speciﬁcation Absolute accuracy ±2 LSB @ 25˚C Temperature drift Offset: ±5ppm/˚C maximum Gain: ±5ppm/˚C maximum Glitch energy Area: 15nV * seconds Peak: 15mV Capacitive load drive 100µF Settling time 100µs to ±1 LSB of ﬁnal value (less than 100pF load) Output current drive ±5mA (25mA short-circuit current) Power up...
Page 103: Table A-6. Power Supply Requirements For The Das-1801St, Das-1802St, And Das-1802Hr
Table A-6. Power Supply Requirements for the DAS-1801ST, DAS-1802ST, and DAS-1802HR Attribute DAS-1801ST/DAS-1802ST DAS-1802HR +5VDC input 520mA typical; 500mA typical; 870mA maximum 870mA maximum +12VDC input 190mA typical; 200mA typical; 550mA maximum 550mA maximum Maximum current available at the ±15V outputs 70mA 70mA...
Page 104: Connector Pin Assignments
Connector Pin Assignments This appendix contains pin assignments for connectors of a DAS-1800ST/HR Series board and a STA-1800U accessory. Main I/O Connector Pin assignments for the main I/O connector of a DAS-1800ST/HR Series board are shown in Figure B-1. (User Common Mode) U_CM MD - 01 26 - CH00 HI CH00 LO or CH08 HI - 02 27 - CH01 HI...
Page 105: I/O Connectors J1 And J2 Of The Sta-1800U Accessory
I/O Connectors J1 and J2 of the STA-1800U Accessory Pin assignments for I/O connectors J1 and J2 of the STA-1800U accessory are shown in Figure B-2. 02 - CH00 HI (User Common Mode) U_CM MD - 01 04 - CH01 HI CH00 LO or CH08 HI - 03 06 - CH02 HI CH01 LO or CH09 HI - 05...
Page 106: Connector J3 Of The Sta-1800U Accessory
Connector J3 of the STA-1800U Accessory Connector J3 of the STA-1800U accessory is a 37-pin male D connector that accepts a C-1800 cable from an SSH-8 accessory. Pin assignments for J3 are shown in Figure B-3. 1 - +5V SSHO - - TGOUT —...
Page 107: Figure B-4. Pin Layouts And Assignments For Sta-1800U Connectors J4 To J7 And Jumper Pads J8 To J11
CH04 LO/CH12 HI CH05 LO/CH13 HI CH00 LO/CH08 HI CH01 LO/CH09 HI CH04 HI CH05 HI CH00 HI CH01 HI LL GND LL GND ODAC0 ODAC1 LL GND LL GND MUX 04 MUX 05 MUX 04 MUX 05 MUX 06 MUX 07 MUX 06 MUX 07...
Page 108: Driverlinx Configuration Notes
DriverLINX Conﬁguration Notes This appendix contains the following sections: Conﬁguration — describes how DriverLINX works with DAS-1800ST/HR boards. Special Device Settings — describes settings used speciﬁcally for the DAS-1800ST/HR boards. Implementation Notes — describes how DriverLINX implements features of the DAS-1800ST/HR boards. Analog Input Subsystem —...
Page 109: Configuration
“DAS-1802” refers to the models with high range analog input. A sufﬁx, such as “ST,” designates models with certain features. The sufﬁx “XX-DA” refers to both the ST-DA and HR-DA models. DriverLINX for the Keithley DAS-1800HC supports the following models: DAS-1801ST DAS-1801AO...
Page 110: Address
Address The default address used by all DAS-1800 boards is 768 decimal or 0x300 hex. If you have more the one Keithley board or another peripheral card at the same address, you will have to change the DIP switch settings for the device address on the board.
Page 111: Ai Irq
-10V. The maximum voltage is +9.9951V (12-bit DACs) and +9.9997V (16-bit DAS-1802HR-DA). The output range for the DAS-1800HC boards is bipolar only and is software programmable for ±10 volts or ±5 volts. For this board, unity gain minimum voltage is -5V and maximum voltage is +4.9976V.
Page 112: Number Of Exp-1800S
Number of EXP-1800s You can expand the number of single-ended analog input channels connected to your DAS-1800 board by using one to sixteen EXP-1800 expansion boards. Each EXP-1800 is 1-to-16 multiplexer that replaces one onboard channel with sixteen expansion channels. Conﬁgure your DriverLINX Logical Device to use the additional channels by entering the number of EXP-1800s here.
Page 113: Implementation Notes
Device Only the DAS-180AO boards support DMA transfer of data for Analog Output tasks. The following table summarizes the operations implemented for each of the supported modes of the DriverLINX subsystem using the Keithley DAS-1800 boards DriverLINX Configuration Notes Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
Page 114: Table C-2. Allowed Operations And Events For Supported Subsystem Modes
Table C-2. Allowed Operations and Events for Supported Subsystem Modes Subsystem Events Mode Operation Timing Start Stop Analog Input Polled Start rate, dig, null cmd, dig, null null, TC, dig Interrupt Start, Stop, Status rate, dig cmd, dig cmd, TC, dig Start, Stop, Status rate, dig cmd, dig...
Page 115: Analog Input Subsystem
The following list explains the Event abbreviations in the preceding table: null — Null or None Event when a Service Request does not require an event. cmd — Command Event when DriverLINX starts or stops a task on software command. TC —...
Page 116: Internal Clocking
Internal Clocking Specify internal clocking using a Rate Timing Event as a rate generator (RATEGEN) on Logical Channel 0 with an internal source. For hardware independence, the application may specify the clock channel using the symbolic constant, DEFAULTTIMER, which always uses the Logical Channel assigned by hardware for analog input.
Page 117: External Triggering
DI_EXTCLK. Connect the external clock source to XPCLK [44]. The hardware external clocking feature of the DAS-1800 supports positive or negative active edge clocking. Note that the DAS-1800HC models use DI 0/XPCLK for both external clocking and digital input. BE SURE that external clock source is TTL compatible, 0V minimum to +5V maximum! External Triggering...
Page 118: Analog Input Multiplexer
Analog Input Multiplexer The EXP-1800 Input Multiplexers can expand the number of physical channels to 256 single-ended analog input channels. The DAS-1800 hardware automatically switches the multiplexer channels. This feature allows acquisition from the multiplexer channels in DMA mode. To enable DriverLINX to use multiplexer(s), select the “16 SE” option for Analog Input Channels in the Device Conﬁguration dialog box.
Page 119: Table C-3. Table Of Logical Channel Numbers For Eight External Exp-1800 Multiplexers
To determine the DriverLINX Logical Channel number for an EXP-1800 Multiplexer channel, use the following formula or refer to the following table. Note that DriverLINX uses a 0-based numbering scheme for all analog input channels and “a/d chan” refers to the native physical channel on a DAS-1800 where you attached the mux.
Page 120: Data Coding
Table C-3. Table of Logical Channel Numbers for Eight External EXP-1800 Multiplexers (cont.) Native Chan etc. Mux # Input Chan # Data Coding The DAS-1800 converts the analog input signal data and returns its value in an integer format. For bipolar mode, the hardware returns A/D data as 2’s complement in the range of -2048 to 2047 for 12-bit and -32768 to 32767 for 16-bit A/Ds.
Page 121: Table C-4. Input Voltage And A/D Binary Value
The DAS-1800 returns data in integer format for all data transfer modes—POLLED, INTERRUPT, and DMA. The “native” data format of all DAS-1800 A/D boards is integer. There are no channel “tags.” The 12 least signiﬁcant bits of the word contain the 12-bit A/D data (right justiﬁed).
Page 122: A/D Conversion Delay
The values returned by the A/D converter range from -2048 to 2047 in bipolar mode and 0 to 4095 for unipolar mode independent of the gain or channel conﬁguration. For a 12-bit A/D at a gain of 100 in the ±100mV range (bipolar mode), the voltage resolution would be 200mV ----------------- -...
Page 123: Analog Output Subsystem
Analog Output Subsystem The DAS-1800ST-DA models offer four channels of multiplying 12-bit D/A converters and DAS-1802HR-DA models offer two channels of multiplying 16-bit D/A converts. The DAS-1800ST and DAS-1802HR models do not provide analog output. The DAS-1800HC models contain two channels of multiplying 12-bit D/A converters.
Page 124: Analog Output Initialization
The disadvantages are: You cannot change the analog output values while the analog output task is running. There is a delay while DriverLINX loads the FIFO. Buffer-ﬁlled notiﬁcation messages cannot be posted as the hardware does not permit detection of end-of-buffer conditions. The STATUS operation cannot provide the “number of buffers processed”...
Page 125: External Clocking
DriverLINX supports synchronous analog I/O using a shared pacing clock source. To synchronize analog input with analog output, set up two service requests as follows: 1. Analog Output Service Request (SR). The Timing Event should be a Rate Generator using Logical Channel 0 (AI clock). This speciﬁes that the AO SR will use the same pacing source as the next, or currently active, AI SR.
Page 126: Data Coding
the digital input data on the Logical Channel and then compared against the pattern for a match/mismatch. DriverLINX will use hardware triggering if the Digital Start Event corresponds to a positive or negative edge at input port line, DI 1/TGIN [B40] for DAS-1800HC and TGIN [46] for other DAS-1800 models.
Page 127: D/A Conversion Delay
If you select the ±5V range, the D/A output range will be from -5 to +5V as follows: Voltage Resolution ----------- - 2.4414mV 4096 Table C-7. Binary Values and D/A Voltage Binary Value D/A Output Voltage -2048 -5.0000V 0 0.0000V 1 +2.4414mV +2047 +4.9976V D/A Conversion Delay...
Page 128: D/A Data Lost
The D/A conversion delay to output a periodic waveform with a given number of samples per period is simple to determine. For example, the conversion delay for a 200Hz wave with 100 samples/cycle is ----------------------- - --------------- - frequency 200Hz D/A conversion delay ----------------------------- 50ms...
Page 129: Digital Input Initialization
state of these lines during active analog input tasks is not possible as it is for DO 0-3. You must output the data for logical channel 1 (MUX port) before starting an analog input task. The hardware maintains the last value written to this port until you change it with another task.
Page 130: Counter/Timer Subsystem
Counter/Timer Subsystem The DAS-1800 uses an Intel 8254 Programmable Interval Timer that consists of 3 internal 16-bit counters, Counter 0, Counter 1, and Counter 2. For A/D pacing, the DAS-1800 boards operate Counters 1 and 2 in a ﬁxed divider, 32-bit conﬁguration. The input of Counter 1 connects to a 5MHz crystal oscillator and the output of Counter 1 connects to the input of Counter 2.
Page 131 Index allowed operations in DriverLINX analog 4-11 ground (±15 V return) 4-11 ground (LL GND) 4-11 ground (U_CM MD) A/D channels input DriverLINX support for 2-23 output A/D conversion delay analog input multiplexer C-15 input programming in DriverLINX C-11 input programming in DriverLINX A/D data lost analog input subsystem C-15...
Page 132 connecting 4-16 analog output signals C/C++ 4-14 differential inputs function libraries for programming in 4-17 digital control signals 4-17 digital I/O signals C16-MB1 4-10 EXP-1800 C-1800 MB01 backplane C-2600 MB02 backplane 4-10 CAB-50 Series 4-18 multiple boards cables 4-11 signals C16-MB1 4-13 single-ended inputs...
Page 133 data coding DriverLINX C-13 input programming in DriverLINX analog I/O panel output programming in DriverLINX description C-19 using 2-15 data conversion modes API DLLs 2-22 data transfer modes description Delphi browser map function libraries for programming in calibration utility CD ROM installation 4-11 DGND (digital ground) computer resource requirements...
Page 134 expansion board input configuring in DriverLINX analog 2-23 external clocking digital input programming in DriverLINX gains and ranges output programming in DriverLINX installing C-18 DAS-1800ST/HR Series board 2-18 external digital trigger interfaces external gating for DriverLINX installation C-10 input programming in DriverLINX internal clocking 2-17 external pacer clock...
Page 135 2-20 post-trigger acquisition potentiometers main I/O connector power specifications MB Series modules 2-28 powering boards MB01 backplane 2-20 pre-trigger acquisition MB02 backplane problem isolation mode data acquisition supported in DriverLINX model configuration QRAM multiplexer control lines queue, channel-gain C-11 input programming in DriverLINX MUX multiplexer control lines RAM storage repeat mode sampling...
Page 136 2-18 2-20 analog input, DAS-1800HR Series TGIN 2-24 analog input, DAS-1800ST Series TGOUT analog output, DAS-1800ST-DA Series throughput 2-16 time base, internal pacer clock 2-15 analog output, DAS-1802HR-DA timing, data conversion modes 2-18 digital I/O triggers power supply, DAS-1801ST and...
Page 137 Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments, Inc. All other trademarks and trade names are the property of their respective companies. Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 1-888-KEITHLEY (534-8453) •...
Page 138 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

This manual is also suitable for:

Das-1800hr series Das-1801st Das-1802st Das-1802hr Das-1801st-da, das-1802st-da Das-1802hr-da

Keithley DAS-1800ST Series User Manual

Preface

1 Overview

2 Functional Description

3 Setup and Installation

4 Cabling and Wiring

5 Testing the Board

6 Calibration

7 Troubleshooting

Specifications

Connector Pin Assignments

Driverlinx Configuration Notes

Quick Links

Troubleshooting

Need help?

Questions and answers

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Summary of Contents for Keithley DAS-1800ST Series

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Table of Contents