I measured the DC voltage, and discovered a cold solder joint on the PCB. The DS2450 is reading voltage correctly now.
Do the Alarms work? I don't follow how to set and/or detect an alarm. I want to know if the voltage drops below 1V DC. I read the documentation, but it wasn't quite obvious what I should be doing. I do have the DS2450 locally powered. I've set the POWER bit checkbox. I also have the PIO check box set for the channels I want to monitor. Do the conversions happen continuously when power is set to true? Or, only when I attempt to read the voltage? Thanks, Jim Paul Alfille wrote: > Can you test a DC voltage? It's always possible that we aren't reading > voltages correctly. > > Paul Alfille > > On 6/9/06, Jim Duda <[EMAIL PROTECTED]> wrote: > >> >>Yes, 60 Hz. I would expect the capacitor to remain at some steady state >>voltage, somewhere around 1.5V. I don't have access to an oscillosope at >>home. >> >>Jim >> >> >>"Paul Alfille" <[EMAIL PROTECTED]> wrote in message >>news:[EMAIL PROTECTED] >>Not at all off-topic. >>I'm no expert, but the schematic is at >>http://www.hobby-boards.com/catalog/links/hvac2-r1/HVAC%20Monitor%20v2.0%20Schematic.pdf >> >>With 1M resitor and 1uF capacitor, the time constant is 1 second. What is >>the frequency of your AC? 60Hz? >> >>Paul Alfille >> >> >>On 6/7/06, Jim Duda <[EMAIL PROTECTED]> wrote: >> >>>I apologize if this is off topic, since owfs seems to handle DS2450 just >>>fine, as best I can surmise. >>> >>>I purchased a "HVAC Monitor Kit" from Hobby Boards. The description of >>>the board states that it can measure any voltage up to 28V AC or DC. >>>The design has a diode and a resistive voltage divider (100K/1M) on the >>>front-end of the DS2450 voltage inputs. >>> >>>For the signal I want to monitor, my DVM measures 15V AC at the terminal >>>lug of the HVAC Monitor. However, via owfs HTTP, I see various voltages >>>between 240 mV and 1.5V, seems to be all over the place, like maybe a >>>sinusoid :-) >>> >>>Can anyone offer any tips on how I might measure an AC voltage with this >>>thing? >>> >>>Jim >>> >>> >>> >>>_______________________________________________ >>>Owfs-developers mailing list >>>[email protected] >>> >> >>https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> >> >> ________________________________ >> >> >> >> >> ________________________________ >> >> >>_______________________________________________ >> >>Owfs-developers mailing list >>[email protected] >>https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> >> >> >> >> >>_______________________________________________ >>Owfs-developers mailing list >>[email protected] >>https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
