Units; StdP value vs. non values
05-09-2016, 06:13 PM
Post: #1
 toshk Member Posts: 194 Joined: Feb 2015
Units; StdP value vs. non values
StdP; non value 101.325_kPa. Correct
StdP; value 101.325. trick question or what?
StdP; value 101.325E3. That is the true value!! 760mmHg
05-09-2016, 06:46 PM (This post was last modified: 05-09-2016 06:47 PM by Tim Wessman.)
Post: #2
 Tim Wessman Senior Member Posts: 2,259 Joined: Dec 2013
RE: Units; StdP value vs. non values
(05-09-2016 06:13 PM)toshk Wrote:  StdP; non value 101.325_kPa. Correct
StdP; value 101.325. trick question or what?
StdP; value 101.325E3. That is the true value!! 760mmHg

Actually, it has been this way even back to the 48 series. The constant lib there returns a value of 101.325 when you don't have units attached. When you are not using units, the assumption is just that in the end you interpret as kPa. I remember looking at this extensively and talking to a few physics/chemistry professors before deciding to match what was done before.

I'm open to change it, but the behavior does seem to make sense in actual practice.

TW

Although I work for the HP calculator group, the views and opinions I post here are my own.
05-09-2016, 07:38 PM
Post: #3
 toshk Member Posts: 194 Joined: Feb 2015
RE: Units; StdP value vs. non values
On the historical level, I can't battle the staunch members( RPN CLINCHERS ) of this noble forum.
But "value" here is "magnitude",standard is standard. Standard pressure is 760mmHg is 101325_Pa. And not 101.325 you have to append kilos later in your calculations later.
CONVERT(760_mmHg,1_Pa)
05-09-2016, 11:17 PM
Post: #4
 Tim Wessman Senior Member Posts: 2,259 Joined: Dec 2013
RE: Units; StdP value vs. non values
(05-09-2016 10:23 PM)informach Wrote:  Hi!:
[snip off topic information]

The discussion is not about how to do unit conversions. It makes it very hard for people to follow discussions when you post non-topic discussions in every single thread. Could you please post only on topic things directly related to the discussion?

Thank you!

TW

Although I work for the HP calculator group, the views and opinions I post here are my own.
05-09-2016, 11:31 PM
Post: #5
 informach Member Posts: 109 Joined: Jul 2015
RE: Units; StdP value vs. non values
Hi!, Tim:

I have, the feeling, that I was wrong, in the response. It's for this reason, that I erased, what had inserted. Obviously, I wanted to clarify the units, used for years, in my profession, of oil and gas engineering and has, HP PRIME for me, is enough.

Kind Regards.
informach.
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