Connect with us

shielding for current stability?

Discussion in 'Electronic Basics' started by Fritz Oppliger, Jan 30, 2004.

Scroll to continue with content
  1. I am using AD592AN temp sensors. Connected via split up ribbon cable type
    wire , +12V on the high side, voltage divider on the low side> 120K/22.1K
    / AGND, resulting 2.something volts fed past clamping diodes into 4051
    MUX, to 16bit ADC CS5501 .

    I run 8 sensors in parallel, the wires are about 2 feet long.
    To calibrate I put all sensors in a bundle and set their output as equal
    to a precision mercury thermometer.

    Then I move them apart to measure temp in various places. If I put the
    mercury alongside any one of them there now appear discrepancies up to
    0.6F .

    When I re-calibrate as per above they again agree with the mercury.

    The environment is inside an incubator box, with (hopefully grounded)
    metal mesh cradles and fans stirring the air .

    Question: is there a possible influence of the air flow or charge
    potential in the cradles upon the device itself or the wire? Would using
    shielded wire make sense?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-