Keithley 6517a Getting Started Manual
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Keithley 6517a Getting Started Manual

Electrometer/high resistance meter
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Model 6517A
Electrometer/High Resistance Meter
Getting Started Manual
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

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Summary of Contents for Keithley 6517a

  • Page 1 Model 6517A Electrometer/High Resistance Meter Getting Started Manual 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...
  • Page 2 WARRANTY Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of shipment. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation.
  • Page 3 Model 6517A Electrometer/High Resistance Meter Getting Started Manual ©2000, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Second Printing, June 2003 Document Number: 6517A-903-01 Rev. B...
  • Page 4 Revision A (Document Number 6517A-903-01) ............ September 2000 Revision B (Document Number 6517A-903-01) .............. June 2003 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand names are trademarks or registered trademarks of their respective holders.
  • Page 5 Keithley products are designed for use with electrical signals that are rated Measurement Category I and Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient over-voltages.
  • Page 6 To maintain protection from electric shock and fire, replacement components in mains circuits, including the power transformer, test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable national safety ap- provals, may be used if the rating and type are the same. Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component.

  • Page 7: Table Of Contents

    Table of Contents Front Panel Operation Product overview ................ Display ..................Power-up ..................Warm-up ................Bench defaults ................Changing functions ..............Voltage measurements .............. 1-10 Guarding ................1-12 Current measurements .............. 1-12 Resistance measurements ............1-14 Auto V-Source ..............1-16 Amps Rel ................
  • Page 8 Resolution ................. 2-16 Configure resolution ............2-16 Filter ..................2-16 Filter types ................. 2-16 Filter modes ............... 2-17 Median filter ..............2-17 Configuring filters ............. 2-18 Buffer (Data Store) ..............2-19 Storing readings ..............2-19 Math ..................2-20 Selecting and configuring math ......... 2-21 Enabling math ..............
  • Page 9 SCPI signal oriented commands ..........3-10 :FETCh? ................3-10 :MEASure[:<function>]? ..........3-10 SCPI subsystem commands ............. 3-11 Defaults ................3-11 Fresh readings ..............3-11 Function configuration ............3-12 V-Source ................3-14 Data store (Buffer) ............3-14 Open/close channels and scan ........... 3-14 Trigger model ..............
  • Page 10 List of Tables Measurement Options Table 2-1 Multiple displays by function ..........Table 2-2 Summary of main menu............Table 2-3 Configuration settings for instrument operations....Table 2-4 Configuration settings for each measurement function ..Table 2-5 Menu summary ...............
  • Page 11 List of Illustrations Front Panel Operation Figure 1-1 Model 6517A front panel overview ........Figure 1-2 Model 6517A rear panel overview ......... Figure 1-3 Voltage measurements ............1-11 Figure 1-4 Current measurements ............1-13 Figure 1-5 Resistance measurements ............ 1-15 Figure 1-6 Resistivity measurements ............

  • Page 12: Front Panel Operation

    Front Panel Operation...

  • Page 13: Product Overview

    Keithley representative, or call one of our Applications Engineers at 1-800-348-3735 (U.S. and Canada only). Worldwide phone numbers are listed in the front of this manual. The Model 6517A is a 6 -digit electrometer/high resistance system with the following measurement capabilities: •...
  • Page 14 Scan (measure) channels of an internal scanner card (e.g., Model 6521 or 6522) installed in the option slot The Model 6517A front and rear panel overviews (Figure 1-1 and Figure 1-2) include important abbreviated information that should be reviewed before operating the...

  • Page 15: Figure 1-1 Model 6517A Front Panel Overview

    Front Panel Operation Model 6517A Getting Started Manual Figure 1-1 Model 6517A front panel overview Secondary Display Line Primary Display Line EDIT ERR REM TALK LSTN SRQ REAR FILT MATH 4W AUTO ARM TRIG SMPL 6517A ELECTROMETER/HIGH RESISTANCE METER VOLTAGE...
  • Page 16 Model 6517A Getting Started Manual Front Panel Operation 6 OPERATION KEYS Z-CHK Enables/disables zero check. Enable zero check before changing functions. Enables/disables relative reading FILTER Displays digital filter status for present function and toggles filter on/off MATH Displays math calculation and toggles math on/off if configured...

  • Page 17: Figure 1-2 Model 6517A Rear Panel Overview

    PREAMP OUT Follows the signal amplitude applied to the INPUT terminal. With GUARD on, PREAMP OUT is internally connected to the inner shell of the INPUT triax connector to configure the input for guarded volts measurements. Referenced to COMMON. See the Model 6517A User’s Manual for more information.
  • Page 18 2V ANALOG OUTPUT Binding post provides a scaled 0 to 2V output that is referenced to COMMON. Typically connected to a measuring device such as a chart recorder. See the Model 6517A User’s Manual for more information. COMMON Binding post that is internally connected to INPUT low through a 0.6Ω...

  • Page 19: Display

    Front Panel Operation Model 6517A Getting Started Manual Display As shown in the Model 6517A front panel overview (Figure 1-1), the front panel has three lines of display information: the primary display line, the secondary display line, and annunciators. •...

  • Page 20: Bench Defaults

    Front Panel Operation Bench defaults The Model 6517A can save ten user setups in non-volatile memory. You can select one of the user setups as the power-on default or have the instrument power up to either of the two factory defaults (optimized for “BENCH” or “GPIB” operation).

  • Page 21: Voltage Measurements

    (“ZCor” displayed), then “Grd” will not be displayed. To achieve optimum accuracy for low voltage measurements, zero correct the Model 6517A. To do this, use the RANGE key to select the lowest measurement range (2V) and press REL. With zero correct enabled, the REL indicator is on.

  • Page 22: Figure 1-3 Voltage Measurements

    Model 6517A Getting Started Manual Front Panel Operation 1-11 Figure 1-3 Voltage measurements A. Unguarded (GUARD off) 6517A WARNING: NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL O 237-ALG-2 Red (HI) Cable COMMON INPUT 250V PEAK LINE R Measured 90-13...

  • Page 23: Guarding

    I. The Z-CHK key is used to enable/disable zero check. To achieve optimum accuracy for low current measurements, zero correct the Model 6517A. To do this, use the RANGE key to select the lowest measurement range (20pA) and press REL. With zero correct enabled, the REL indicator is on, and the message “ZCor”...

  • Page 24: Figure 1-4 Current Measurements

    Model 6517A Getting Started Manual Front Panel Operation 1-13 Connect the instrument to the current to be measured as shown in Figure 1-4. CAUTION Do not apply more than 250V peak (DC to 60Hz; 10 seconds per minute maximum on mA ranges), or instrument damage may occur.

  • Page 25: Resistance Measurements

    Connect the Model 6517A to the test fixture. Generic connections are shown in Figure 1-5A. Note that this connection scheme requires that ammeter LO be inter- nally connected to V-Source LO. See “Configuring V-Source” in Section 2 to con- trol this internal LO-to-LO connection.

  • Page 26: Figure 1-5 Resistance Measurements

    Model 6517A Getting Started Manual Front Panel Operation 1-15 Figure 1-5 Resistance measurements A. Generic connections 6517A WARNING: NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PER 237-ALG-2 Cable V SOURCE PREAMP OUT COMMON 250V PEAK INPUT 250V PEAK Black Measured...

  • Page 27: Auto V-Source

    1-16 Front Panel Operation Model 6517A Getting Started Manual Auto V-Source Auto V-Source should be used to achieve optimum accuracy for ohms measurements. With Auto V-Source selected, the V-Source is automatically set for either 40V or 400V. For the 2MΩ through 200GΩ ranges, the V-Source is set to 40V. For the 2TΩ through 200TΩ...

  • Page 28: Resistivity Measurements

    Connect the Model 6517A to the Model 8009 test fixture as shown in Figure 1-6, and set the switch on the test fixture to the desired measurement type (Surface or Volume).
  • Page 29 1-18 Front Panel Operation Model 6517A Getting Started Manual Cursor position (SURFACE or VOLUME menu item blinking) indicates the selected measurement type: • SURFACE — If Surface is the selected measurement type, you do not have to proceed any further into the menu structure. Use the EXIT key to exit from the menu.

  • Page 30: Figure 1-6 Resistivity Measurements

    Model 6517A Getting Started Manual Front Panel Operation 1-19 Figure 1-6 Resistivity measurements Model 8009 METER SOURCE INTERLOCK Warning: Connect of fixture to safety earth ground using TRIAX MAX INPUT 250 MAX 1100V HI-LO safety ground wire. 6517-ILC-3 Interlock Cable...

  • Page 31: Charge Measurements

    Connect the test cable (see Figure 1-7) to the input of the Model 6517A and, with the input open, disable zero check. If needed, press REL to zero the display.

  • Page 32: Auto Discharge

    Model 6517A Getting Started Manual Front Panel Operation 1-21 Auto discharge When enabled, Auto Discharge is used to automatically reset the charge reading to zero when the specified charge level is reached. After the integrator resets, the charge measure- ment process simply restarts at zero. Perform the following steps to enable or disable Auto Discharge.

  • Page 33: External Temperature And Relative Humidity Measurements

    The Model 6517A can make external temperature measurements from -25°C to 150°C using the Model 6517-TP type K thermocouple (which is a supplied accessory). The Model 6517A can make relative humidity measurements (0 to 100%) using the Model 6517-RH humidity probe (which is available as an option).

  • Page 34: Measurement Control

    “Change From Cal Temp” multiple display. See Section 2, “Multiple Displays.” Temperature units All temperature readings by the Model 6517A can be displayed in °C, °F, or K. BENCH reset selects °C measurement units. Perform the following steps to change units: Press MENU to display the main menu.

  • Page 35: Display Reading Options

    1-24 Front Panel Operation Model 6517A Getting Started Manual Display reading options Temperature and humidity readings are available as multiple (NEXT) displays. Using multiple displays, temperature and humidity readings can accompany each normal A/D measurement, and they can be included as data storage elements for each reading stored in the buffer.

  • Page 36: Measurement Options

    Measurement Options...

  • Page 37: Multiple Displays

    This section describes the details of making measurements. Configuration options, trig- gers, reading storage, and scanning are just a few of the topics discussed. You will find this information useful whether operating the Model 6517A from the front panel or IEEE-488 bus.
  • Page 38 Model 6517A Getting Started Manual Measurement Options Time, Day, and Date — This display provides the FILT time, day of week, and the date. The time, date and format (12-hour or 24-hour) are set from the CLOCK option of the GENERAL MENU (see main Menu).
  • Page 39 Measurement Options Model 6517A Getting Started Manual Limits — This display provides the result of the limit FILT test. The graphical representation of the reading is shown on a zero-centered bar graph. If the reading is between the specified high and low limits, the PASS 6517 ELECTROMETER/HIGH RESISTANCE METER message is displayed.

  • Page 40: Menus

    Measurement Options Menus There are two basic menu structures used by the Model 6517A: the main menu and the CONFIGure menus. The main menu accesses items for which there are no dedicated keys; the CONFIGure menus configure measurement functions and other instrument operations.

  • Page 41: Navigating Menus

    Measurement Options Model 6517A Getting Started Manual Table 2-3 Configuration settings for each measurement function Reso- Autorange External Amps Meas Auto Function Speed Filter lution limits Damping Guard feedback type* Source** discharge Volts • • • • • • Amps •...

  • Page 42: Table 2-5 Menu Summary

    Model 6517A Getting Started Manual Measurement Options The unit is returned to the normal reading display by: • Pressing EXIT or MENU from the top level of the main menu. • Pressing EXIT from the top level of a configuration menu.

  • Page 43: Voltage Source

    Measurement Options Model 6517A Getting Started Manual Voltage source The built-in, bipolar, 1W voltage source can output up to ±1000V. With the instrument in the normal measurement mode, the programmed V-Source level is shown on the bottom line of the display.

  • Page 44: Basic Operation

    Model 6517A Getting Started Manual Measurement Options Figure 2-2 FVMI connections V SOURCE INPUT 250V PEAK Note: V-SOURCE LO connected to ammeter input LO via METER-CONNECT option of CONFIGURE V-SOURCE Menu. Ammeter V-Source Basic operation Basic operation simply consists of setting the V-Source level, and placing the V-Source in operate to output the voltage.

  • Page 45: Configuring V-Source

    2-10 Measurement Options Model 6517A Getting Started Manual Configuring V-Source Perform the following steps to configure the V-Source: Press the CONFIG key and one of the VOLTAGE SOURCE keys (OPER, , or ) to display the following configuration menu: RANGE: Select the 100V range or 1000V range.

  • Page 46: Zero Check

    Model 6517A Getting Started Manual Measurement Options 2-11 Zero check With zero check enabled (“ZeroCheck” displayed), the input signal is routed to low through a high impedance shunt. For volts, amps, and ohms measurements, zero check should be enabled when connecting or disconnecting input signals. For charge measure- ments, zero check should be disabled.

  • Page 47: Triggering

    Model 6517A User’s Manual. Triggering is configured from the Trigger Configuration menu which is accessed by pressing CONFIG and then TRIG. There are two trigger modes for the Model 6517A; basic and advanced. These two trigger modes are summarized by the simplified trigger models shown in Figure 2-3 and Figure 2-4.

  • Page 48: Idle

    The instrument is in idle whenever it is not within one of the layers of the trigger model. When the Model 6517A is taken out of idle by pressing TRIG (or sending :INIT or :INIT:CONT ON over the bus), the ARM indicator turns on and operation proceeds in the...

  • Page 49: Control Sources

    After each measurement (device action), an output trigger pulse occurs and is available at the rear panel of the Model 6517A. When used with an external scanner (such as a Model 7001 or 7002 Switch System), each output trigger would be used to select the next channel in a scan (see “External Scanning”...

  • Page 50: Bench Default Trigger Model Setup

    (or idle). Bench default trigger model setup The bench default setup selects advanced triggering and takes the Model 6517A out of idle, sets the control sources of all layers to Immediate, and sets the Measure Layer counter to infinite.

  • Page 51: Resolution

    filter. Filter types The Model 6517A has two types of digital filters: averaging and advanced. Both types are a simple average of 1 to 100 reading conversions. The difference is a user-programmed noise “window” for the advanced filter. The noise window (expressed as a percentage of range) allows a faster response time to large signal step changes (see Figure 2-5).

  • Page 52: Filter Modes

    Model 6517A Getting Started Manual Measurement Options 2-17 Figure 2-5 Filter response/noise window Input signal Response with the noise window turned “on” shifts when the input signal moves Response with beyond the specified range no noise window Limits of the...

  • Page 53: Configuring Filters

    2-18 Measurement Options Model 6517A Getting Started Manual Configuring filters Each measurement function has its own filter configuration. Perform the following steps to configure filter: Select the measurement function. Press CONFIG and then FILTER to display the following menu items: AVERAGING: This item is used to control and configure the digital filter.

  • Page 54: Buffer (Data Store)

    2-19 Buffer (Data Store) The Model 6517A has a buffer that can store from one to over 15,000 readings. The actual number of readings that can be stored in the buffer depends on how many optional data elements are included for each reading (see Table 2-22 in the User’s manual).

  • Page 55: Math

    2-20 Measurement Options Model 6517A Getting Started Manual Press STORE. The presently programmed buffer size (number of readings to store) is displayed. If desired, use the cursor keys and the RANGE keys to change the buffer size. (Incrementing the most significant digit sets the buffer size to maximum.)

  • Page 56: Selecting And Configuring Math

    Model 6517A Getting Started Manual Measurement Options 2-21 Ratio: Ratio where: X is the normal display reading Y is the user-entered reference value Ratio is the displayed result Log10 (logarithmic): X = Y where: X is the input reading Y is the logarithmic result Selecting and configuring math...

  • Page 57: Enabling Math

    Display = LOG10 (reading) Math is disabled by pressing MATH a second time. Additional math operations In addition to the math performed on single readings described above, the Model 6517A has these math operations: • Math performed on buffered readings (maximum and minimum values, average, and standard deviation).

  • Page 58: Test Sequences

    Multiple Displays MAX, MIN Test sequences The following information summarizes the built-in test sequences of the Model 6517A. Detailed information on test sequences can be found in the User’s Manual. Selecting and configuring a test sequence A test sequence is selected and configured from the CONFIGURE SEQUENCE menu as follows: Press CONFIG and then SEQ to display the sequence configuration menu.

  • Page 59: Connections

    EXTERNAL — Test will start when a trigger pulse (via EXT TRIG IN connector) is received by the Model 6517A. TRIGLINK — Test will start when a trigger pulse (via TRIG LINK connector) is received by the Model 6517A. You will also be prompted to select the input line for the trigger. Connections...

  • Page 60: Running A Test

    Model 6517A Getting Started Manual Measurement Options 2-25 Figure 2-7 Typical FVMI connections 6517A WARNING: NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUA 7078-TRX Cable V SOURCE PREAMP OUT COMMON 250V PEAK INPUT 250V PEAK TRIGG LINK Shield CAUTION: CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE...

  • Page 61: Internal Scanning

    Model 6517A Getting Started Manual Internal scanning The Model 6517A can be used with a scanner card (such as the Model 6521 or 6522) installed in the option slot of the instrument. This section provides basic information for scanning internal channels. If the scanner card is not already installed, refer to the scanner card instruction manual.

  • Page 62: Perform The Scan

    RANGE keys and pressing ENTER. If you need more information on navigating the menu structure, see “Menus”. Set up the Model 6517A for the desired measurement (i.e., function, range, filter, etc.). Press CARD to display the internal scanner options (close channel or perform scan).

  • Page 63: Close/Open Channels

    OPEN-ALL-CHANNELS and press ENTER. External scanning The Model 6517A can be used with a scanner card (such as the Model 7158 Low Current Multiplexer Card) installed in an external scanning mainframe (Model 706, 7001, or 7002 Switch System). With the use of external triggering, the Model 6517A can measure and store each scanned channel.

  • Page 64: Configure External Channels

    The scanner configuration menu is used to specify the number of channels (external inputs) for the scan. If a scanner card is installed in the option slot of the Model 6517A, use procedure A. If the option slot is empty, use procedure B.

  • Page 65: Perform The Scan

    RANGE keys and pressing ENTER. Model 6517A — Press the CARD key. If a scanner card is installed in the option slot of the Model 6517A, perform steps a and b. If the option slot is empty, proceed to step 2.
  • Page 66 ( and ) and RANGE keys ( and ). Press ENTER to continue. Model 6517A – You will then be asked if you wish to use the scan timer. The timer is used to provide a time interval between each scan. If you select YES, enter the interval (in seconds).

  • Page 67: Remote Operation

    Remote Operation...

  • Page 68: Overview

    (DDCs) instead of command commands and SCPI com- mands. This mode allows you to use the Model 6517A as a “drop-in” replacement for the Model 617 Electrometer. Existing programs written for the Model 617 can be used by the Model 6517A without having to make any code modifications.

  • Page 69: Ieee-488 Bus Standards

    RS-232-C standard. IEEE-488 bus connections The Model 6517A is connected to the IEEE-488 bus using a cable terminated with stan- dard IEEE-488 connectors. Figure 3-1 shows a typical connection scheme for a multi-unit test system. Note that connectors can be stacked to accommodate the parallel connection scheme.

  • Page 70: Rs-232 Connections

    Model 6517A Getting Started Manual RS-232 connections The RS-232 serial port of the Model 6517A can be connected to the serial port of a com- puter using a standard, straight-through (not null modem) RS-232 cable terminated with DB-9 connectors. The serial port is located on the rear panel of the Model 6517A and is labeled “RS232”.

  • Page 71: Rs-232 Interface Selection And Configuration

    Model 6517A: NOTE The RS-232 settings (baud rate, data bits, parity, and stop bits) of the Model 6517A must match the RS-232 settings of the communications package for your computer. Press MENU to display the MAIN MENU. Place the cursor (using keys) on COMMUNICATION and press ENTER.

  • Page 72: Common Commands

    Remote Operation Model 6517A Getting Started Manual Perform the following steps if you wish to check and/or change parity: Place the cursor on PARITY and press ENTER to display the parity options (NONE, ODD or EVEN). Cursor position indicates the present setting. To retain the present setting, press ENTER or EXIT.

  • Page 73: Scpi Commands

    finished until instrument operation returns to the idle state. SCPI commands In the Model 6517A, you are given access to control settings that are hidden on other instruments. Because the instrument has more control points available, it requires more commands than its counterparts to perform comparable tasks.

  • Page 74: Scpi Command Syntax

    Remote Operation Model 6517A Getting Started Manual SCPI command syntax Tree structure SCPI commands are organized in a tree structure, similar to disk directories in computer operating systems. Each subdirectory is called a subsystem. For example, part of the SENSe1 subsystem is listed below and shown in Figure 3-2.

  • Page 75: Long And Short Form Commands

    You must send the exact short or long form. However, you do not have to use the mixed capitalization. The Model 6517A accepts commands in any combination of upper and lower case. For example, all of the following are valid forms of the...

  • Page 76: Command Syntax

    A leading colon instructs the Model 6517A to interpret the command starting at the root (highest level) of the command tree. Since the Model 6517A also starts at the root each time you send it a new command, the leading colon is not needed (although the instrument will accept it if you send it).

  • Page 77: Scpi Subsystem Commands

    Defaults SYSTem Subsystem :SYSTem Set the 6517A to the system present defaults. Some :PREset of the selected defaults include: volts, continuous triggers, normal speed (1.0 PLC), and auto range. Select power-on setups: RST, PRESet, or SAV0 :POSetup <name>...

  • Page 78: Function Configuration

    3-12 Remote Operation Model 6517A Getting Started Manual Function configuration SENSe Subsystem [:SENSe[1]] Select measurement function: :FUNCtion <name> <name> = 'VOLTage[:DC]' Volts function 'CURRent[:DC]' Amps function Ohms function 'RESistance' Coulombs 'CHARge' function Path to configure volts: :VOLTage[:DC] Set speed: 0.01 to 10 PLC.
  • Page 79 Model 6517A Getting Started Manual Remote Operation 3-13 Path to configure Ohms: :RESistance (Volts commands) The commands for Volts (except :GUARd) apply. Path to configure Auto V-Source Ohms: [:AUTO] Path to set measurement range: :RANGe Select range (0 to 100e18).

  • Page 80: V-Source

    3-14 Remote Operation Model 6517A Getting Started Manual V-Source SOURce Subsystem :SOURce Specify V-Source level (0 to ±1000V). :VOLTage <n> Select range; ≤100 = 100V range, >100 = 1000V :RANGe <n> range. Path for voltage limit: :LIMit Specify voltage limit; 0 to 1000 (V).

  • Page 81: Trigger Model

    Model 6517A Getting Started Manual Remote Operation 3-15 Trigger model Performing a system preset (:SYSTem:PRESet) configures the advanced trigger model for typical instrument operation. After a system preset, many advanced operations can be accomplished using the initiate commands, :ABORt, and the trigger (measure) layer com- mands.

  • Page 82: Test Sequences

    3-16 Remote Operation Model 6517A Getting Started Manual Test sequences TSEQuence subsystem. :TSEQuence Arms selected test sequence. :ARM Stops a test sequence in process. :ABORt Specify test; DLEakage, CLEakage, CIResistance, :TYPE <name> RVCoefficient, SRESistivity, VRESistivity, SIResistivity, SQSWeep, STSWeep. Specify trigger source; MANual, IMMediate, BUS, :TSOurce <name>...

  • Page 83: Status Register

    :STIME <NRf> Status register The status register structure of the Model 6517A lets you monitor and act upon numerous events that occur. Many programming decisions can be made by monitoring the Measure- ment Event Register and the Operation Event Register. See the User’s Manual for details of the status registers.

  • Page 84: Program Examples

    The following example program illustrates changing function and range. It sets the range for several functions, then takes readings on each of those functions. Note that the Model 6517A rounds the range parameter to an integer before choosing the appropriate range. Sending VOLTage:DC:RANGe 20.45 will set the Model 6517A to...

  • Page 85: One-Shot Triggering

    Model 6517A Getting Started Manual Remote Operation 3-19 'Example program to demonstrate changing function and range, 'taking readings on various functions 'For QuickBASIC 4.5 and KPC-488.2/CEC interface card 'Edit the following line to where the QuickBASIC 'libraries are on your computer '$INCLUDE: 'c:\qb45\ieeeqb.bi'...
  • Page 86 Changing any of the settings in the TRIGger subsystem does not automatically arm the Model 6517A for triggers. The following program sets up the Model 6517A to take one reading each time it receives an external trigger pulse. 'Example program to demonstrate one-shot external triggering 'For QuickBASIC 4.5 and KPC-488.2/CEC interface card...

  • Page 87: Continuous Triggering #1

    3-21 Continuous triggering #1 The following example program sets up the Model 6517A to take readings as fast as it can once it receives an external trigger. The actual reading rate will depend upon other factors, such as A/D integration time, autorange on/off, etc.

  • Page 88: Continuous Triggering #2

    Model 6517A Getting Started Manual Continuous triggering #2 The following example program sets up the Model 6517A to take readings continuously after an external trigger is received. The trigger rate is set to one reading every 50ms. 'Example program to demonstrate continuous triggering 'at a specified rate 'For QuickBASIC 4.5 and KPC-488.2/CEC interface card...

  • Page 89: Generating Srq On Buffer Full

    When your program must wait until the Model 6517A has completed an operation, it is more efficient to program the Model 6517A to assert the IEEE-488 SRQ line when it is finished, rather than repeatedly serial polling the instrument. An IEEE-488 controller will typically address the instrument to talk, then unaddress it, each time it performs a serial poll.

  • Page 90: Storing Readings In Buffer

    TRACe:FEED:CONTrol PRETrigger The following example program sets up the Model 6517A to take 20 readings as fast as it can into the buffer, then reads the data back after the buffer has filled. The readings will be stored with the timestamp, etc., but the program reads back only the reading values and...
  • Page 91 'TRACe subsystem is not affected by *RST CALL SEND(27, "trac:poin 20;elem none", status%) CALL SEND(27, "trac:feed:cont next", status%) 'Start everything CALL SEND(27, "init", status%) 'Initialize reading$ while the 6517A is busy taking readings reading$ = SPACE$(4000) WaitSRQ: IF (NOT(srq%) THEN GOTO WaitSRQ CALL SPOLL(27, poll%, status%) IF (poll% AND 64)=0 THEN GOTO WaitSRQ CALL SEND(27, "trac:data?", status%)

  • Page 92: Taking Readings With The Scanner Card

    CALL ENTER(reading$, length%, 27, status%) PRINT reading$ The following example program sets up the Model 6517A using a scan list to measure DC voltage on channels 1, 2, and 3. The meter takes ten sets of readings, with each set spaced...
  • Page 93 Remote Operation 3-27 The Model 6517A stores the readings in the buffer, and asserts SRQ when the buffer is full. The program waits for the SRQ, then reads the readings from the buffer. 'Example program to demonstrate using the scan list 'For QuickBASIC 4.5 and KPC-488.2/CEC interface card...

  • Page 94: Test Sequence - Staircase Sweep

    3-28 Remote Operation Model 6517A Getting Started Manual Test Sequence — staircase sweep The following program performs a staircase sweep. Using the source voltage measure cur- rent (FVMI) method, this test will measure the current through a DUT (see Figure 2-8) at eleven voltage steps (0V through 10V).
  • Page 95 Model 6517A Getting Started Manual Remote Operation 3-29 WaitSRQ IF (NOT (srq%)) THEN GOTO WaitSRQ CALL spoll(27, poll%, status%) If (poll% AND 64) = 0 THEN GOTO WaitSRQ 'Dump buffer readings to computer CRT: CALL send(27, ":TRACE:DATA?", status%) CALL enter(DATA1$, length%, 27, status%)

  • Page 96: Specs And Accessories

    Specs and Accessories...
  • Page 97 Specifications VOLTS VOLTS ACCURACY TEMPERATURE (1 Year) COEFFICIENT ° ° ° ° ° ° 5½ DIGIT –28 –18 C & 28 –50 ± ± ° RANGE RESOLUTION (%rdg+counts) (%rdg+counts)/ 10 µV 0.025 + 4 0.003 + 2 100 µV 20 V 0.025 + 3 0.002 + 1 200 V...
  • Page 98 Accuracy is equal to accuracy of V-source plus accuracy of selected Amps range. PREAMP SETTLING TIME: Add voltage source settling time to preamp settling time in Amps specification. OHMS: Alternating Polarity Method Using Keithley 8002A or 8009 fixture REPEATABILITY: ∆I + 0.1% (1σ) (instrument temp. constant ±1°C).
  • Page 99 Specifications VOLTAGE SOURCE VOLTAGE SOURCE ACCURACY TEMPERATURE (1 Year) COEFFICIENT ° ° ° ° ° ° 5½ DIGIT –28 –18 C & 28 –50 ± ± ° RANGE RESOLUTION (% setting + offset) (% setting+offset)/ 100 V 5 mV 0.15 + 10 mV 0.005 + 1 mV 1000 V 50 mV...
  • Page 100 Specifications GENERAL DISPLAY: 6 -digit vacuum fluorescent multiline. OVERRANGE INDICATION: Display reads “OVERFLOW.” RANGING: Automatic or manual. CONVERSION TIME: Selectable 0.01 PLC to 10 PLC. PROGRAMS: Provide front panel access to IEEE address, choice of engineering units or scientific notation, and digital calibration.
  • Page 101 Index Filter 2-16 Filter modes 2-17 Filter types 2-16 Fresh readings 3-11 Additional math operations 2-22 Front Panel Operation Amps Rel 1-16 Function configuration 3-12 Auto discharge 1-21 Auto V-Source 1-16 Generating SRQ on buffer full 3-23 Guarding 1-12 Basic operation Bench default trigger model setup 2-15 Bench defaults...
  • Page 102 Relative 2-10 Remote Operation Resistance measurements 1-14 Resistivity measurements 1-17 Resolution 2-16 RS-232 connections RS-232 interface selection and configuration RS-232 standard Running a test 2-25 SCPI command syntax SCPI commands SCPI signal oriented commands 3-10 SCPI subsystem commands 3-11 Selecting and configuring a test sequence 2-23 Selecting and configuring math 2-21...
  • Page 103 Service Form Model No. _______________ Serial No. __________________ Date _________________ Name and Telephone No. ____________________________________________________ Company _______________________________________________________________________ List all control settings, describe problem and check boxes that apply to problem. _________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ ❑ Intermittent ❑ Analog output follows display ❑...
  • Page 104 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) •...

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