[BC] Novus Development?

[Steve Lewis]

I set out to build an air conditioner energy management system back in the
80's... I think the principle of the thing was to use a comparator to
respond to the voltage coming back from the sensor (I bought a couple of
things that Heathkit used to sell) on one side of the comparator, and a
"precision" voltage reference on the other side of the comparator.  I seem
to recall that the Heathkit device was some sort of heat sensitive diode.
In the morning I'd calibrate it in a glass of ice water but by the afternoon
if I tried calibration again the same way, it was nowhere close.

I eventually came to the conclusion that the "precision" reference voltage
was also sensitive to the heat in the room and it wandered.  I gave up.
Does the temperature wander around in the room where you have the device?

-----Original Message-----

I know it can be done via computer. We use it to take readings from a
B&B Electronics temp probe which is mounted on top of the building with
our Davis Weather Station, and we communicate it to all our on air
machines for automatic temperatures when unattended (mainly during
overnights). 

Now if we can only get the temp probe to be a little more accurate, as
during the day it seems to be +10 compared to the what the actual
temperature is. During the nighttime it's pretty much dead on. (any
ideas????)

Here's the link: http://www.eltima.com/products/serial-over-ethernet/

On 11/5/2010 11:54 AM, RichardBJohnson at comcast.net wrote:

>Someone on another list has acquired some RS-232 - to - Ethernet
>adapters that evidently were intended for some application in broadcast
>automation systems; they're labeled  Novus Development RTP-72A Ethernet
>to RS232 Converter