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
Am 22.07.2013 10:49, schrieb Robert Budde:
The first DS2483 is directly connected to the native I2C line (/dev/i2c-1)
of the Beaglebone Black. As far as I can tell, this setup works well as long
as I do not enable the I2C switch. When I enable the I2C-switch by using a
Device Tree Overlay 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
i store in external app
Em 23/07/2013 14:11, Jan Sennesael jan.sennes...@skynet.be 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
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 temperature
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
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
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
