Matthias
08.08.2009, 08:37
This is a question from Larry (came over email - please ask for support in this forum - makes our support easier - thank you):
HI Matthias..
I hooked up the ptc this evening... came on as expected running high speed ..since the temp delta is 3 + degrees
heres the problem....
i have tunzes running on the profilux... voltage set at 3v-8v power range min 1 % max 60%
runs perfect without the ptc hooked up...
when i hook up the ptc to a l port.... now when the tunzes go to minimum they stop spinning and then start up clunking...
when i unhook the ptc from an l port ..the tunzes are fine and dont stop spinning...
i tried increasing the min a few% but same thing happens..
it appears there is some sort of interference from the ptc on the l ports.....
is this possible? any thoughts? solutions?
Answer:
If there are other devices on the L-ports (like PTC or dimmable lamps) the output voltage of the L-ports may drop down some mV. In some cases this is enough to fall below the threshold where the Tunze pump will run (is usually 3V).
Simple solution: Increase the lower output voltage of the L-port where the Tunze-pump is connected, e.g. to 3.5V
HI Matthias..
I hooked up the ptc this evening... came on as expected running high speed ..since the temp delta is 3 + degrees
heres the problem....
i have tunzes running on the profilux... voltage set at 3v-8v power range min 1 % max 60%
runs perfect without the ptc hooked up...
when i hook up the ptc to a l port.... now when the tunzes go to minimum they stop spinning and then start up clunking...
when i unhook the ptc from an l port ..the tunzes are fine and dont stop spinning...
i tried increasing the min a few% but same thing happens..
it appears there is some sort of interference from the ptc on the l ports.....
is this possible? any thoughts? solutions?
Answer:
If there are other devices on the L-ports (like PTC or dimmable lamps) the output voltage of the L-ports may drop down some mV. In some cases this is enough to fall below the threshold where the Tunze pump will run (is usually 3V).
Simple solution: Increase the lower output voltage of the L-port where the Tunze-pump is connected, e.g. to 3.5V