Have acquired a used HP3421A (to replace an older unit that died), and am having difficulty getting this unit to measure at AC voltages below ~60mV. The prior unit had no problem before it went on us. Generally, once you input a voltage higher than this (give or take), it begins to read more accurately (it needs cal. as its a bit off, but ok for now). Any thoughts?




Dear Jeff,

may be your new HP4321 needs a new calibratio procedure. It would be possible, that the internal lithium battery cell now is failured, and the stored calbiration data are lost....

Best regards - Christoph Klug

Possibly Related Threads...
Thread Author Replies Views Last Post
  Circuit for HP3421A Data aquisition Barrie Carruthers 4 1,165 01-06-2012, 07:14 AM
Last Post: RamLab
  HP82973A INT54 driver and HP3421A Ellis Easley 2 645 09-25-2003, 05:13 PM
Last Post: Ellis Easley
  3056DL software for the hp85 and the hp3421a Andy 0 464 08-26-2003, 08:22 PM
Last Post: Andy
  MAnual for HP3421A Gerhard M. Oberforcher 2 729 02-06-2001, 10:38 AM
Last Post: Philip Reagan

Forum Jump: