Harald Noack
Guest
Sun Feb 13, 2005 12:17 am
Hello!
Has someone of you experience how a high precision multimeter is constructed
?
e.g.:
http://www.home.agilent.com/USeng/nav/-11250.536881781/pd.html
How is the voltage reference stabilized? (by using an oven?)
Are the input voltage divider temperature stabilized ? (temp. coeff.)
How is the self calibration done?
What type of ADC is used (maybe time to digital converter) ?
How is the integral and differential non-linearity measured and compensated
?
THANKS a lot for your help
Harald Noack
Andrew Tweddle
Guest
Sun Feb 20, 2005 1:30 pm
Harald Noack wrote:
Quote:
Hello!
Has someone of you experience how a high precision multimeter is constructed
?
e.g.:
http://www.home.agilent.com/USeng/nav/-11250.536881781/pd.html
How is the voltage reference stabilized? (by using an oven?)
Are the input voltage divider temperature stabilized ? (temp. coeff.)
How is the self calibration done?
What type of ADC is used (maybe time to digital converter) ?
How is the integral and differential non-linearity measured and compensated
?
THANKS a lot for your help
Harald Noack
If you peruse back through old copys of the HP Journal, there was an
article on the design of the HP3458A, which should answer your questions
in detail. Mine are packed away so I can't give you the date.
Hope this helps
Andrew
CJT
Guest
Mon Feb 21, 2005 12:40 am
Harald Noack wrote:
Quote:
Hello!
Has someone of you experience how a high precision multimeter is constructed
?
e.g.:
http://www.home.agilent.com/USeng/nav/-11250.536881781/pd.html
How is the voltage reference stabilized? (by using an oven?)
Are the input voltage divider temperature stabilized ? (temp. coeff.)
How is the self calibration done?
What type of ADC is used (maybe time to digital converter) ?
How is the integral and differential non-linearity measured and compensated
?
THANKS a lot for your help
Harald Noack
Careful -- precision isn't worth much without accuracy, and you're going
to have a heck of a time calibrating to a commensurate accuracy.
--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.
