Re: [time-nuts] PRS10 Heatsink Temperature
> Le 24 nov. 2015 à 01:33, Charles Steinmetz a écrit : > > David wrote: > >> I plan to add a small temperature controlled fan to limit the heatsink >> temperature. Can anyone recommend a suitable setpoint for the heatsink? > > An SRS engineer once told me to keep the PRS10's baseplate temperature below > 40C. You think that they would know their stuff. But their heatsinks don’t quite do that. They get close. My 3 PRS10s are all bolted to heat sinks supplied by SRS. There are two versions of sinks that I have, a older thick ribbed type and the latest non ribbed U shaped type which I must admit looks terribly over-priced. The latest one is slightly better and keeps the measured temp at the baseplate surface to 42°C in a 25°C free air environment. The older one keeps it below 43°. > > Best regards, > > Charles > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. "The main function of a modern police force is filling in forms." ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PRS10 Heatsink Temperature
The LPRO data manual has a graph of MTBF and operating temperature. The lower the temperature, the longer it lives. I would choose a temperature so low that for maybe 5% of the time the fan control would not hold it down but let it run 1 or 2 degrees high. It depends on how you value its life and how much harm escaping from thermostasis for an hour or two does to your task. Cheers, Neville Michie ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PRS10 Heatsink Temperature
David wrote: I plan to add a small temperature controlled fan to limit the heatsink temperature. Can anyone recommend a suitable setpoint for the heatsink? An SRS engineer once told me to keep the PRS10's baseplate temperature below 40C. Best regards, Charles ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PRS10 Heatsink Temperature
Charles and Bob, Thanks. I'll report back on how it works out. david n 24/11/2015 10:33 AM, Charles Steinmetz wrote: David wrote: I plan to add a small temperature controlled fan to limit the heatsink temperature. Can anyone recommend a suitable setpoint for the heatsink? An SRS engineer once told me to keep the PRS10's baseplate temperature below 40C. Best regards, Charles ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PRS10 Heatsink Temperature
Hi Based on having fried a number of Rb’s …. I’d set it as low as you can without it going crazy. Something around 35 to 40C is a pretty good target. Bob > On Nov 23, 2015, at 2:13 AM, davidh wrote: > > Hi All, > > I'm moving a PRS10 Rb to a new case. In the current case, the heatsink's > getting to around 60dC, which is getting close to the maximum operating spec > of 65dC. > > I plan to add a small temperature controlled fan to limit the heatsink > temperature. Can anyone recommend a suitable setpoint for the heatsink? > > Thanks, > > david > > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] PRS10 Heatsink Temperature
Hi All, I'm moving a PRS10 Rb to a new case. In the current case, the heatsink's getting to around 60dC, which is getting close to the maximum operating spec of 65dC. I plan to add a small temperature controlled fan to limit the heatsink temperature. Can anyone recommend a suitable setpoint for the heatsink? Thanks, david ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
