[PSUBS-MAILIST] depth gauge

[hank pronk via Personal_Submersibles]

 Thanks' Jon,  it really doesn't even matter if the one for change is actually one foot.  I suppose what I want is an accurate (within reason)  indication if the sub is moving up or down or sitting still.Hank
    On Thursday, March 15, 2018, 10:29:48 AM MDT, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 For a voltage or current output from a sensor, the change of depth is going to be an issue of resolution that will be determined by the ADC.  From that perspective change of depth will be as accurate as the ADC can provide, but "repeatability" may come into play which may affect whether each 1 foot of depth is sensed as an actual 1 foot of depth.  There may be some variability but I think in general, the change of depth would be accurate for all intents and purposes.
Sean may care to comment.



      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, March 15, 2018 12:01 PM
 Subject: [PSUBS-MAILIST] depth gauge
  
Hi all, recently there was talk about a depth gauge.  Jon mentioned the accuracy being being a percentage of depth.  In an effort to save battery life, I am thinking I should add a digital depth or pressure gauge.  My feeling is, if it is accurate in terms of change of depth it would be valuable to have.  The question is, is the accuracy short fall a mater of actual depth or change of depth or both?  I don't care about actual depth, I just care about change of depth.Hank_______________________________________________
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