Re: Simpson 260 repair

In article <67effc27$6$2789$882e4bbb@reader.netnews.com>,
user@example.net says...

 
Picked up a Simpson 260 6M at the local thrift store, I was initially
disappointed to find it had a sticking meter but some gentle rocking
freed it.
 
Unfortunately the movement resistance is a little high, about 1880 ohms
vs the 1800 in the service manual. This causes the movement to not fully
deflect when 50 uA (sourced from an HP 6177B, and monitored by a
recently lab-calibrated 3478A) is run through it, it goes to more like
48.5 out of 50.
 
Is it correct that recharging the meter movement is the only thing that
can help in this situation? It seems a relative error of 3% is actually
still barely within factory spec so probably best to just let it go and
enjoy a meter that's nice enough for the 10 bucks I paid for it, lol
 
 

For a meter that is over 50 years old that is probably not too bad.  I
have 2 of the meters and the book says the meter is 48 uA
 the best I recall and that parallel pot sets it to 50 uA.  So that
meter does not seem too bad.  with digital meters getting much closer it
is hard to get it in ones head that those old meters were field
instruments and not super accurate.  A 50 uA meter that has been banged
around for 50 plus years is luck to be that close.