[time-nuts] Tbolt temperature sensor

[GandalfG8 at aol.com]

In a message dated 06/02/2009 00:51:21 GMT Standard Time,  holrum at hotmail.com 
writes:

Well,  I did the experiment....  I put the unit into  holdover,  spritzed the 
DS1620 temp sensor with cold spray,  no  immediate change in the DAC voltage 
was seen.  Then about 10 seconds  later the DAC reading shot up.  After a 
minute or so,  the temp  reading was rapidly rising its way to normal and the DAC 
voltage was  dropping,  lagging by about 10 seconds.

Looks like the temperature  definitely sensor affects holdover compensation...


-----------------
Probably can't argue with that then:-)
 
Another thought I had earlier, is it possible perhaps that  Trimble were 
running out of space for a firmware upgrade and cut back on the  complexity of 
this routine having decided that precision of ambient  temperature measurement 
was sufficiently of a "secondary" nature not  to warrant the extra code they'd 
used when more space was available?
 
regards
 
Nigel
GM8PZR