HP34401A Revision Query

Queries the current instrument firmware revision and instrument driver revision.

Caution  If you are using the Serial interface, the pass/fail outputs, Pins 1 and 9, must not be enabled on the serial connector. Enabling these outputs might result in instrument damage.

Details

VISA session is a unique reference to an instrument I/O session. It identifies which device to communicate with and all configuration information to perform the I/O. A VISA session is a unique logical identifier used by VISA to communicate with a resource. The VISA session is maintained by the VISA resource name control and is not seen by the user.
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
dup VISA session is a copy of VISA session. Use dup VISA session programmatically to pass VISA Session to any calling VIs.
Instr Driver Revision indicates the revision of the instrument driver software.
Instr Firmware Revision indicates the revision of the instrument firmware. This version and its capabilities are controlled by the instrument manufacturer.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

HP34401A Revision Query Details

Note  You must have VISA version 2.0 or later installed to use this instrument driver.

Revision History

HP34401A Digital Multi-Meter

Created By: JRO

Release Date: 06/97

Originally Developed in LabVIEW Version: LV 4.0.1

Modification History:

06/97:

JRO, REV 1.0, 06/97, LV 4.0.1: Added Utility VIs and Menus. Edited help and VI Info for the LLBs, Controls, VIs, and VI Tree. To avoid breaking any applications, I left the older VIs that also perform some of the operations that the Utility VIs perform.

12/97:

JRO, REV 2.0, 12/97, LV 4.1: Added Error Query and Mulit-Error Query VIs. Changed the connector panes and driver source code where necessary so the driver can be used as an example.

06/98:

NAA, REV 3.0, 07/98, LV 5.0: Added required utility VIs. The Read Measurement VI was replaced with an updated Read Meas VI. The new VI allows up to 50,000 samples to be taken. Fixed the Error Query VI and corrected the coerced range for trigger delay. Reversed the fixed resistance settings.

06/98:

NAA, Rev 3.0.1, 07/98, LV 5.0.1: Replaced a while loop with a more efficient Spreadsheet string to array function. Removed an unnecessary write function. Established 22 as the default address in the Getting Started VI.

11/98:

ME/JRO, Rev 4.0, 11/98, LV 5.0.1, VISA 2.0: Updated the Instrument Driver so that it can use the Serial bus interface. However, VISA 2.0 or later must be installed to achieve this functionality. Replaced the HP34401A Write VI with the VISA Write VI. Added a wait for operation complete in the Control Mode VI that allows the VI to wait until the instrument enters the remote state before proceeding. Depending upon the number of measurements last taken, the instrument can take several minutes to go from Local to Remote; however, in most instances this will happen in less than 30 seconds.

11/98:

ME/JRO, Rev 4.0.1, 11/98, LV 5.0.1, VISA 2.0: Changed the connector pane for the Getting Started VI to add the Address/Port control next to the Interface control on the connector terminal pane. Added a Warning to the Getting Started and Initialize VIs.

12/98:

ME/JRO, REV 4.1.0, 12/98, LV 5.0.1, VISA 2.0: Modified the Read Measurement VI for Serial reads. The VI was redesigned so that it does many small reads instead of one large read. One large read has a correspondingly large timeout causing the driver thread to monopolize system resources and the system to respond very slowly to input from the mouse or keyboard. With many small reads the driver does not have this problem.

01/99:

ME/JRO, REV 4.1.1, 01/99, LV 5.0.1, VISA 2.0: Modified the Read Measurement VI for Serial reads. Bug fix for Serial Read case of the Read Meas VI.

01/00:

ME, REV 4.2, 04/00, LV 5.1.1, VISA 2.0.1: Added the HP34401A Block Read Demo VI. Added a Reset After Read option to the HP34401a Read Max/Min VI. Added the Find Meter VI. Updated the control description for all occupancies of the Buffer control. Similar changes were made to the description for all occupancies of the Trigger control. Original Text - If the Software Trigger Control is set to "T: ON" then this control is ignored. Revised Text - When using external buffering, software triggers will be ignored.

03/00:

ME, REV 4.2, 03/00, LV 5.1, VISA 2.0: Updated Read Meas. to allow for initiation of data collection only and transfer of data in smaller blocks rather than all at once. Added an Abort Meas VI. Replaced numerical constants with text ring constants in attribute nodes. Corrected the HP34401A Control Mode VI to allow the *OPC loop to terminate upon errors rather than waiting to time out. Added data storage option to the Config Math VI.