[time-nuts] HP Agilent 34401A

EB4APL eb4apl at cembreros.jazztel.es
Sat May 18 07:49:26 EDT 2013

I don't have experience on this DMM but usually the Ohms sense terminals 
and the correspondent current source ones are internally connected by 
resistors that become shorted at the Kelvin connected ends when used in 
4 wire connection.  If any of this resistors became open you meter will 
do weird things when in 2 wire Ohms measurements.

Ignacio EB4APL

El 18/05/2013 3:23, Volker Esper wrote
> Hi,
> I bought a 34401A lately. It's all fine, except it's got a fault when 
> measuring low ohm with 2-wires: the value runs (monotonic) from 0 to 
> 30 oder 40 Ohms at a speed of say 1 ohm per second and after a while 
> it decides to run back... When using 4-wires-measurement everything's 
> alright.
> Did anyone have that problem before?
> Thank you
> Volker
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