LabVIEW Drivers for AMI Magnet Systems
Version 2.0
4/14/2003

The included drivers are designed to operate with LabVIEW version
6.1 or higher, and require a LabVIEW-supported GPIB card. The
default install location is an "AMI" folder within the "User.lib"
folder of your LabVIEW installation. The hierarchy of files is
important for proper operation.

The installation package is designed for PCs running Windows 9x,
ME, NT 4, 2000, or XP. The virtual instruments (VI) should
be compatible with LabVIEW installations on other operating
systems, but you will need to contact AMI to determine an
appropriate distribution method. One solution could be to first
install to a PC and then copy the AMI folder to another LabVIEW
platform.

Drivers and example integrated panels are included for the AMI
Model 420 Digital Power Supply Programmer, the AMI 135 Liquid
Helium Level Monitor, the Neocera LTC-21 Temperature Controller,
and the Lakeshore Model 332 Temperature Controller.

ROM version 2.0 or later is required in the AMI Model 420 to use
these drivers without modification. The ROM version is displayed
by the Model 420 when first powered on.

The "example" VI's illustrate one way to use the lower level VI's
for each instrument in an integrated control panel. The user may
customize the examples or develop a custom panel to perform the
specific actions required by an experiment.

The VI's are self-documenting. You can discover details about the
exact function of the VI by exploring the contents of each. All
provided VI's (with the exception of the Model 135) use the "Common
VIs" for the lowest level of GPIB communication.

Only a subset of commands for the Model 420, Neocera LTC-21, or
Lakeshore Model 332 are currently supported. However, note that 
the Command and Query VI's for the instruments can be easily 
customized by simply modifying the command string sent to the 
instrument as well as the input control types and labels.


Included is a short description of each example VI:

Current Example.vi - Requires connection via GPIB to an AMI
Model 420. It provides an example of controlling current in a
superconducting magnet.

Field Example.vi - Identical to the previous VI, except the
control and display are in units of kilogauss.

Field and Temp (LTC-21) Example.vi - Requires connection via GPIB to
an AMI Model 420 and Neocera LTC-21. It provides an example of
controlling the field in a magnet, and monitoring/controlling a
single temperature.

Field and Temp (332) Example.vi - Requires connection via GPIB to
an AMI Model 420 and Lakeshore Model 332. It provides an example 
of controlling the field in a magnet, and monitoring/controlling a
single temperature. Also open the Set 332 Tuning.vi to interactively
adjust the tuning while monitoring/controlling.

Field, Temp (LTC-21), and Level Example.vi - Requires connection via 
GPIB to an AMI Model 420, AMI Model 135, and Neocera LTC-21. It 
provides an example of controlling the field in a magnet, 
monitoring/controlling a temperature, and monitoring the liquid 
helium level in a dewar. Automatic rampdown of the magnet is 
initiated if the low level alarm of the AMI Model 135 is triggered.

Field, Temp (332), and Level Example.vi - Requires connection via 
GPIB to an AMI Model 420, AMI Model 135, and Lakeshore Model 332. 
It provides an example of controlling the field in a magnet, 
monitoring/controlling a temperature, and monitoring the liquid 
helium level in a dewar. Automatic rampdown of the magnet is 
initiated if the low level alarm of the AMI Model 135 is triggered.


Known problems:

1) If the "GPIB Error Report.vi" is not located automatically
   during loading of a VI, you can manually locate it in the
   location:

   LABVIEW/EXAMPLES/INSTR/SMPLGPIB.LLB

   which is included with the standard LabVIEW distribution.


The AMI drivers may be uninstalled by using the Control Panel's
Add/Remove Programs feature.

If you have questions, contact:

Michael McCulloch
American Magnetics, Inc.
(865) 482-1056 ext. 16

Internet e-mail:
support@americanmagnetics.com

World Wide Web:
http://www.americanmagnetics.com/