Hi XinDing,
Unfortunately, we do not have the driver hosted on the 3rd Party National Instruments Instrument Driver Network site (www.ni.com/idnet). However, when I tried to navigate to Varian's website, www.varianinc.com, it redirects to www.agilent.com; and so, I suggest you contact them for legacy drivers. Please let me know if you have any other questions.
Doug W
Applications Engineer
National Instruments
