[time-nuts] Fwd: HP5061B Versus HP5071 Cesium Line Frequencies

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Jun 4 08:01:42 EDT 2017

In message <3ca81847-63c4-f803-994d-8e07c9973ba0 at earthlink.net>, jimlux writes:

>Modern RTDs all are 0.00385 ohm/ohm/degree at 25C.  Typically, you have 
>a 100 ohm device (although there are Pt1000s), so it's changing 0.385 
>ohm/degree.  1 part in 3000

Depending how much money you want to spend, you can also get pt10k
and even pt100k RTD's, to satisfy particular needs for resolution,
self-heating, inductance, mass and the many and varied noises.

And if course, we cannot talk PT100 and fail to repeat the old pun:

	"PT100 is the gold standard for temperature measurement"


Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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