[volt-nuts] Back to voltage was Re: Precision current source

[Greg Burnett]

Bill, I would choose the LTZ-1000 over the old
Fluke 731B - because I've typically found the LTZ-1000 to be approximately 
12
times more stable than the Fluke 731B on a monthly basis, and 7 times more 
stable on a yearly basis. (The 731B spec = 10ppm/month and
30ppm/year.)

Cheers,
Greg


----- Original Message ----- 
From: "WB6BNQ" <wb6bnq at cox.net>
To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
Sent: Monday, August 23, 2010 5:42 PM
Subject: Re: [volt-nuts] Back to voltage was Re: Precision current source

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Just having a single LTZ-1000 is not the whole answer, you still need
additional circuitry to make a complete
item.  The LTZ-1000 is around a $50 (I think) cost and the correct resistors
from Vishay are not cheap either.
Proper packaging is another issue.  Plus the additional circuitry and a PC
board and I suspect the total cost for
one fully constructed is near $200 and I have not factored in the power
source to run it.  A clean power source
with battery backup would be at least another $50 if done right.  Even with
all that it would not equal a Fluke 731
or the newer 732.

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