Release Notes for Keithley 24xx SourceMeter Driver (24xx-850A01).

1. Models Supported: 
   
   2400, 2410, 2420, 2430, 2440

2. This driver works with the following software environments:

   LabVIEW 5.1, 
   LabVIEW 6.0, 
   LabWindows/CVI 5.5,
   Microsoft Visual C++ 6.0, 
   Visual Basic 6.0.
   And any other environments that support Win32 DLL's.

3. This document provides additional information for the installation and use of
   the 24xx-850A01 Keithley 2400 Family of Source Meters Driver.

   Default installation installs the complete driver for all the supported environments.

   The Labview Driver gets installed under the LabView->instr.lib directory, if Labview 
   is installed on the machine, otherwise, it gets installed under the 
   Keithley Instruments->Ke24xx directory. 

   The CVI Driver gets installed under the VXIPnp->Ke24xx directory.

   For use with other Win32 environments the required Dll is installed in VXIPnp->bin directory.


   For Visual basic Users, more help is provided in the Readme_24xx.doc.

   TWo help files gets installed in Keithley Instruments->Help directory. 
   Ke24xxc.hlp is for C users and Ke24xx.hlp is for VB Users.



4. Installation Issues:

   Configuring Passport Drivers:  
   Passport Drivers are used by the VISA software to communicate with specific computer hardware,
   such as GPIB cards and Serial ports.  After installing the 24xx-850A01 driver, 
   and before attempting to use it, you must verify the proper Passport configuration.  
   You do this using the Keithley Configuration Panel.  Open the Panel by selecting 
   Start->Programs->Keithley Instruments->Keithley Configuration Panel.  Click on the Passports 
   menu item.

   If you are using a Keithley Instruments (CEC) GPIB card in your computer, make
   sure the "VISA Passport library for CEC GPIB controllers" is checked.  Uncheck
   all other Passports. Select Save from the file menu and close the Panel.

   If you are using a Keithley Instruments (INES) PCMCIA GPIB card in your 
   computer, make sure the "VISA Passport library for INES GPIB controllers"
   is checked.  Uncheck all other Passports. Select Save from the file menu and 
   close the Panel.

   If you are using a National Instruments GPIB card in your computer, make
   sure the "VISA Passport library for GPIB controllers" is checked.  Uncheck
   all other Passports. Select Save from the file menu and close the Panel.

   If you are using a serial port to communicate with your instrument, make
   sure the "VISA Passport library for Serial" is checked.  Uncheck
   all other Passports. Select Save from the file menu and close the Panel.


5. Known Problems:

   a. The function Ke24xx_Perform_DC_IV is switching the sourceLevel and senseRange parameters. 
   The consequence is that a sourceLevel of 0.0 amps is set in the instrument. The work around is 
   to call   four functions instead:   Ke24xx_Config_DC_IV, Ke24xx_EnableSourceOutput, Ke24xx_Read,
   Ke24xx_EnableSourceOutput.  Examples using this work around technique are available on the web
   site for both LabVIEW and Visual Basic.


   b. The following "Application functions" have a parameter called speed (nplc). The help for this
   parameter says to enter a value between 0.001 and 10. The real values should be 0 - slow, 1 - medium
   and 2 - fast consistent with the ViInt32 data type for this parameter:


        Ke24xx_Perform_DC_IV 
        Ke24xx_Configure_DC_VI 
        Ke24xx_Perform_DC_VI 
        Ke24xx_Configure_Sweep_IV 
        Ke24xx_Perform_Sweep_IV 
        Ke24xx_Configure_Sweep_VI 
        Ke24xx_Perform_Sweep_VI 
        Ke24xx_Configure_List_IV 
        Ke24xx_Perform_List_IV 
        Ke24xx_Configure_List_VI 
        Ke24xx_Perform_List_VI
   
   c. Several "Configuration functions" have a parameter called speed (nplc).  The help for this parameter
   says to enter a value between 0.001 and 10. The real values should be between 0.01 and 10 consistent with
   the Double data type for this parameter:


     Ke24xx_ConfigureDCVSense 
     Ke24xx_ConfigureDCISense 
     Ke24xx_ConfigureDCRESSense



   d. The VISA timeout is set for 5secs and can't be changed.




6. Missing Functionalities:

   The following is a list of functionality that is in the 24xx family of 
   instruments but this driver doesn't support.The user can use the Ke24xx_WriteInstrData 
   and Ke24xx_ReadInstrData functions to send and receive commands/data to the instrument.

   Not supported in the Model 24xx driver

	· User defined Math expressions
	· Relative
	· Limits (1 thru 12)
	· Binning
	· Math (mean, sdev, max, min, pkpk)
	· NPLC caching

7. Notice:

   Keithley 24xx SourceMeter Driver (24xx-850A01) is Copyright (c) 2000-2001, Keithley Instruments, Inc. All
   rights reserved.

   The VISA software supplied with Keithley 24xx SourceMeter Driver (24xx-850A01) is Copyright (c) 2001 National
   Instruments Corporation.  All Rights Reserved.