Command Summary 5
Keysight 3458A Calibration Manual 107
REV?
Description
Revision Query. Returns two numbers separated by a comma. The first number is 
the multimeter's outguard firmware revision. The second number- is the inguard 
firmware revision.
Syntax
REV?
Example
10 OUTPUT 722; "REV?" !READ FIRMWARE REVISION NUMBERS
20 ENTER 722; A,B !ENTER NUMBERS
30 PRINT A,B !PRINT NUMBERS
40 END