mimo1974

W dniu 8/10/2009 o 10:57 PM, jureq napisał:

Sorry for the break,

today, according to the Apogee service recommendations, I loaded a new firmware for the camera (the future camera had ver. 29, and the new firmware was ver. 35, which is interesting, because the camera's "papers" show that the final test passed on July 27) . And relief - camera cooling got a kick - cooling the camera from +24 to -20 degrees takes less than 20 minutes, which is three times less than before. Still, there is this interesting patent - cooling starts with "1% power cooling" and pulls up so much that now much faster. At -20 there is 68% load on the cooler, so it seems that you could easily pull to -25, unfortunately the camera pulls to -24, and then "feedback" from the camera appears to raise the temperature to around -22. It would confirm what Ash wrote about Apogee.

Oh, after uploading Maxima version 5.07, support for the Apogee filter wheel is ok. The wheel works (in terms of filter change speed) a little faster than the FLI wheel and a little quieter .

Interesting - the snapshots in both cameras are not completely lightproof - when you make dark you need to cover the chip with a blank, because in daylight some light "crawls" on the matrix. Of course, in the conditions of the telescope and at night this problem will not occur, but damn it!

Tomorrow I will make gifts at -20 and try to show them. I will try to make a dark at this temperature with STL11000M and also give it to compare (even though the chip in SBIG is interline, but I think the comparison will be interesting, especially since they all have a 9um pixel).

 

Best regards,

 

Jurek

Hi Jurek,

can you send me your newest firmware for Apogee U16M / F16M to info@elsterland-sternwarte.de ? We have a F16M and cooling to delta -45 takes 40minutes

cs though