Re: Need help with PI PICO...

On 26/03/2024 19:16, David Higton wrote:

In message <utv5e7$29onh$2@dont-email.me>
           The Natural Philosopher <tnp@invalid.invalid> wrote:
 

On 26/03/2024 18:16, Ahem A Rivet's Shot wrote:

On Tue, 26 Mar 2024 17:33:50 +0000 Jim H <invalid@invalid.invalid> wrote:
>

Assuming the "oil" you're talking about is kerosene/heating fuel, the
speed of sound is 1330 m/sec so 0.5cm takes 3.76 micro-sec.

>
I would have thought it's measuring the distance to the surface of
the oil from above the oil so it would be the speed of sound in air that
matters 300m/s.
>

Correct, Mrs Shot. Anyway it's died within 30 minutes of going back on
'short echo'... So its definitely sensitive to that in some way.
>
I'll add more debug code tomorrow

 Are you sure the sensor isn't malfunctioning as a result of being in
oil vapour?
 

Since it is operating on the desk in front of me, fairly sure :-)
I haven't let it anywhere near the oil tank yet. The plan is to have it installed by the fall. ready for next winter.
So it is being hammered to check for problems *before* it gets to a cold wet inaccessible oil tank.

David

--
In todays liberal progressive conflict-free education system, everyone gets full Marx.