Hi At least on the 53131, the first sign of wear out was an error message. I believe it was a self test message (checksum error). I could easily be wrong about that. We blew them out within 9 months of when they were first introduced. That was a long time ago.
Bob On Apr 24, 2013, at 3:43 AM, Volker Esper <[email protected]> wrote: > > How do I recognize a wear out? Does the receiver send an error message every > time I try to change the NVRAM or do I have to ask it? > Volker > > Am 24.04.2013 00:08, schrieb Mark C. Stephens: >> Thanks Ulrich, Much Appreciated, prefer to use your software. >> >> Thanks Again, >> mark >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Ulrich Bangert >> Sent: Tuesday, 23 April 2013 5:36 PM >> To: Time nuts >> Subject: [time-nuts] Z38XX >> >> Gentlemen, >> >> due to the discussion that evolved concerning Z38XX i looked up the sources >> and found that indeed every time the current time is read using a >> >> :PTIM:TCOD? >> >> a >> >> :PTIM:TCOD:FORM F2 >> >> is sent in advance to make the receiver answer in the format that Z38XX >> needs. I have not been aware that this could lead to NVRAM wear out but have >> been thinking this simply sets the format of the next output. I have changed >> the software so that the FORM F2 command is now only written once after >> program start. The software can be downloaded from the usual place but I >> have currently no time to test it. >> >> My own experiences with NV memory that can only be written for a limited >> number of times (EEPROM on ATMEL processors) indicates that a clever made >> NV writing routine would first compare the NV contents to what shall be >> written on a byte by byte base and write only changed bytes. >> >> Best regards >> >> Ulrich Bangert >> www.ulrich-bangert.de >> Ortholzer Weg 1 >> 27243 Gross Ippener >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
