Hello 2com,
Thank you for your inquiry regarding an instrument driver for a Fluke 45. It sounds like you would like to control the multimeter using LabVIEW 5.1. Unfortunately, the Instrument Drivers for LabVIEW 5.x no longer exist, since it is a very old version of LabVIEW. The driver is supported by LabVIEW 6.x and 7.x and can be found on the support section of the ni.com website. I would highly recommend upgrading your version of LabVIEW 6 or 7. One solution might also be to write your own driver or save a newer driver in 5.1 format. Then you would have to make some modifications to make sure all of its functions were compatible with LabVIEW 5.1. The following link is where the latest drivers for the Fluke 45 can be found.
http://zone.ni.com/idnet97.nsf/b
rowse/
Other responses similar to this can be found on the ni.com website by clicking the support tab at the top of the home page. Then search for �5.1 instrument drivers� from Technical Resources at the top of the page or topics similar yours. I hope these resources help. Let me know if I can further assist you.
Shea C.
Applications Engineering