[volt-nuts] Reference Calibration Options - Solartron 7081 andFluke 731B and 335A

[gbusg]

Hi Joe,

Whichever standards you choose to have calibrated, IMHO it would be 
important to choose the calibration option *With Data*. Otherwise an 
instrument's parameter might be in tolerance but very close to its spec 
limit - and you would have no way of knowing that without the data.

I agree that the 335A is "odd man out" as far as candidates for the 
selection. So it looks like you've narrowed it down to either the 7081 or 
731B or both.

If you get a full cal on the 7081, you'll have many data points of 
reference, not just 10Vdc. But the calibration is expensive, needless to 
say!

-Greg


----- Original Message ----- 
From: "J. L. Trantham" <jltran at att.net>
To: <volt-nuts at febo.com>
Sent: Wednesday, September 07, 2011 8:58 PM
Subject: [volt-nuts] Reference Calibration Options - Solartron 7081 andFluke 
731B and 335A


I have explored the options for calibration of my 'reference' devices.

The Solartron 7081 calibration is available in Oak Ridge, TN, at Advanced 
Measurement Technology http://www.ametek-online.com/ for $800.00.  They are 
the US branch of the company that owns Solartron, if I understanad 
correctly.  I have emailed with a number of questions regarding the specific 
details of the calibration and documents supplied but have not received a 
reply so far.  I suspect the Service Coordinator I emailed is busy chasing 
down the answers for my many questions.

For the 731B, Fluke offers a Performance Test for $229, Calibration, 
Traceable, W/O Data for $245, Calibration, Z540 Traceable, W/O Data for $259 
and Calibration, Z540 Traceable, W/ Data for $333.  There is no repair 
service available.

For the 335A, there is no Performance Test option and there, also, is no 
repair service available.  However, for the remainder, it is $473, $505, and 
$662 respectively.

My thought is to get the 7081 calibrated and one of the 731B's.  The 'white 
face' 731B is the later unit with the modifications hand written in the 
manual downloaded from the Fluke website already in place.  The 'black face' 
unit is older and does not have these modifications installed.  I'm thinking 
the 'white face' unit would be the best to get calibrated.

Once these are done, I can then do the 'calibration' of the 335A and  the 
other 731B myself.

Any thoughts about this plan, which calibration to choose, or other options 
that might be available?  Also, any thoughts about the potential to need 
'repair' of these Fluke units when sent for calibration?

Thanks in advance.

Joe
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