Re: [volt-nuts] Calibration of 34401A

2016-10-12 Thread John Phillips
The only problem could be that the current calibration is already using most of the adjustment range making the required adjustment outside the limits. On Wed, Oct 12, 2016 at 4:32 AM, Illya Tsemenko wrote: > I had fixed 34401A before and DIY calibrate using on-hand sources,

Re: [volt-nuts] Calibration of 34401A

2016-10-12 Thread Illya Tsemenko
I had fixed 34401A before and DIY calibrate using on-hand sources, with calibrated 7.5d DMM as reference. Whole process can be visible on video - https://www.youtube.com/watch?v=9kukXTqhzsU if you like. So it's not a rocket science, but does need set of stable sources/calibrator. 12/10/16

Re: [volt-nuts] Calibration of 34401A

2016-10-12 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 12 Oct 2016 10:31, "Poul-Henning Kamp" wrote: > > > In message <120112818.2234439.1476263954...@mail.yahoo.com>, Bruce Griffiths wr > ites: > > >Does anybody know if a 34401A can be adjusted by a competent 3rd party lab, > >or are the details of how to adjust the

Re: [volt-nuts] Calibration of 34401A

2016-10-12 Thread Andrea Baldoni
On Wed, Oct 12, 2016 at 09:54:01AM +0100, Dr. David Kirkby (Kirkby Microwave Ltd) wrote: > He sold a Agilent 34401A multimeter which the customer said is out of > specification and can not be adjusted. > > Quickly scanning the measurent results, the meter is not showing results > with any

Re: [volt-nuts] Calibration of 34401A

2016-10-12 Thread Poul-Henning Kamp
In message <120112818.2234439.1476263954...@mail.yahoo.com>, Bruce Griffiths wr ites: >Does anybody know if a 34401A can be adjusted by a competent 3rd party lab, >or are the details of how to adjust the meter not available outside of >Keysight? The service manual has the calibration

Re: [volt-nuts] Calibration of 34401A

2016-10-12 Thread Bruce Griffiths
Calibration of a 34401A is done electronically, however one needs to know the calibration security code.If unknown one needs to open the meter to enable calibration and then reassemble it and complete the calibration. The factory default calibration security code is HP034401 only 034401 need be

[volt-nuts] Calibration of 34401A

2016-10-12 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
I have a 'friend" (actually a person who I have never met, but is a pain in the ***). He sold a Agilent 34401A multimeter which the customer said is out of specification and can not be adjusted. Quickly scanning the measurent results, the meter is not showing results with any huge errors (say