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Thank you very much Jim. Unable to conclude anything. I will repeat my experiments once my set up is ready. Will try to conclude whether this sensor can be used or I have to go for something better.Now that I have had some sleep, here is my graph:
View attachment 92171
The time of day is on the X axis.
The 50m PTX is the blue trace
The external PTX is the red trace
The temperature TX is the yukky green trace.
All values have been normallised to "per unit", of the values at 14:15.
JimB
I would conclude that there is no definite correlation between the three series of data, within the limits of measurement accuracy.Unable to conclude anything.
Eric, you are a hard taskmaster!hi Jim,
As you have got the program set up, any chance you could post a composite plot of series1 and 2 ie: PTX water and PTX air combined.?
Eric
What, not even that they make big jumps up and down at the same time?I would conclude that there is no definite correlation between the three series of data
Eric, you are a hard taskmaster!
and your conclusion is?Now that I have had some sleep, here is my graph:
View attachment 92171
The time of day is on the X axis.
The 50m PTX is the blue trace
The external PTX is the red trace
The temperature TX is the yukky green trace.
All values have been normallised to "per unit", of the values at 14:15.
JimB
Possibly because someone in an office far far away just picked some numbers out of thin air, without thinking of the practicalities of such a measurement.I would like to know why the OP wants this degree of accuracy for a water level that can fluctuate over 40 mtrs in depth.
This minimum to maximum variation will be over a period, say a year. In a particular day change may be less than even 5 cm. 5 cm level change means a big change in the volume of water.I would like to know why the OP wants this degree of accuracy for a water level that can fluctuate over 40 mtrs in depth.
May be even many years.say a year
Not even then. Meter accuracy is 0.5% + 3 digits. Besides, some jumps up coincide with other jumps down.What, not even that they make big jumps up and down at the same time?
Thank youSuggestion:
Make a document in a word processor with a title and then link directly to the post.
The post above is: https://www.electro-tech-online.com...-level-measurement.144260/page-5#post-1218144
I went to the #96 and "Copied the link location"
If you want, you could create a post, with your own index.
Post #96 - Tony's suggestions
For an example line. If you want help on the latter, yell. As you loose editing ability, you can keep moving the index to the last post.
I did a variant on this on a thread that lasted more than a year where I would put the links to the latest scematics and important posts.
Oh. Thanks. I was also thinking how that is doneThe link with a name is done with this syntax:
[I]**broken link removed**[/I]
which will show up as:
**broken link removed**