add 2400 to Keithley24xx class
trivial addition to Keithley24xx class: models 2410 (implemented) and 2400 (new) have same commands, so 2400 just has to be added to initial call to IPowerSupply
Edited by Joern Grosse-Knetter
trivial addition to Keithley24xx class: models 2410 (implemented) and 2400 (new) have same commands, so 2400 just has to be added to initial call to IPowerSupply