Am 23.07.2013 21:46, schrieb Vajk Fekete:
> You also must take into account the wiring. The wires go to the sensor, up
> to the die itself, and are made of good heat conducting material.
>
I second that, in fact that should be the culprit.
Kind regards
Jan
-
You also must take into account the wiring. The wires go to the sensor, up
to the die itself, and are made of good heat conducting material. Use as
narrow wire as possible, and stuff a reasonable amount of the wire under
the insulation. I mean the wire not just comes in a plain line, but is
wrapped
I have exactly the same setup in some places - a DS18S20 on a copper tube,
wrapped with tape and under insulation.
When mounting temperature sensors it's usual to put down a little blob of
conductive paste:
http://www.resol.de/index/produktdetail/kategorie/7/id/50/sprache/en
between the sensor
Am 23.07.2013 19:09, schrieb Jan Sennesael:
> I am mesuring on a copper tube (sensor attached with tie wraps so the flat
> side makes a good connection).
> The temps i am measuring are between 12 and 22 °C.
>
This is problematic because it's near to the ambient temperature. With
such a low temperat
i store in external app
Em 23/07/2013 14:11, "Jan Sennesael" escreveu:
> I am mesuring on a copper tube (sensor attached with tie wraps so the flat
> side makes a good connection).
> The temps i am measuring are between 12 and 22 °C. The tube and the sensor
> are insulted with tube insulation (it
I am mesuring on a copper tube (sensor attached with tie wraps so the flat
side makes a good connection).
The temps i am measuring are between 12 and 22 °C. The tube and the sensor
are insulted with tube insulation (its on my heat pump). (ambient temp is
25°C) The 2 sensors are +-10cm apart so they
Am 22.07.2013 20:55, schrieb Jan Sennesael:
>
> All these sensors are parasite powered.
>
Which temperatures are we talking about? At low temperatures, parasite
power will make the sensor warm itself up a significant amount. There is
no way this could be calibrated by the factory as the resulting
t
On 07/22/2013 14:55, Jan Sennesael wrote:
> I have several DS18x20 sensors in my network, some DS18S20 (the first 12)
> and some DS18B20 (some more added later).
>
> Since i was unsure about some reading of some DS18S20 sensors i used a
> second DS18B20 on the same spot...
> That reading was about
every sensor must be calibrated
https://en.wikipedia.org/wiki/Calibration
in other words, get a sensor as "default", and make every others sensors
have same value for the same temperature (normally a 0 Celsius ice bath)
some ds18x20 have calibration inside rom, other must be done via external
prog
I have several DS18x20 sensors in my network, some DS18S20 (the first 12)
and some DS18B20 (some more added later).
Since i was unsure about some reading of some DS18S20 sensors i used a
second DS18B20 on the same spot...
That reading was about 2°C higher than the DS18S20... i moved it about and
i
10 matches
Mail list logo
