  Rank: Advanced Member Groups: Registered
Joined: 01/04/2020(UTC) Posts: 85  Location: Wellington Was thanked: 4 time(s) in 3 post(s)
|
Thanks overlord. Noted.
I'd not seen Jean's operator-overloading of the units. That isn't something I'd want to do.
|
|
|
|
|
|
 Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866  Was thanked: 983 time(s) in 811 post(s)
|
Originally Posted by: marks2c  I'd not seen Jean's operator-overloading of the units. That isn't something I'd want to do. Original idea from Mathsoft Advisor. Used when no units exist, id:T/hr [Ton/hr mas flow] SI is largely incompatible Process Control Instrumentation.
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 01/04/2020(UTC) Posts: 85 Location: Wellington Was thanked: 4 time(s) in 3 post(s)
|
Hi Davide,
What is the best way to get the custom functions plugin?
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 23/07/2013(UTC) Posts: 1,166  Was thanked: 529 time(s) in 355 post(s)
|
Originally Posted by: marks2c Hi Davide,
What is the best way to get the custom functions plugin? Install it from Tools > Plugins > Local storage/Online Gallery You can learn the process from this video. Regards https://youtu.be/ynFISN32EV4
|
|
|
|
|
|
 Rank: Advanced Member Groups: Registered
Joined: 11/01/2018(UTC) Posts: 144   Location: Wisconsin Was thanked: 67 time(s) in 42 post(s)
|
Originally Posted by: marks2c This is getting so close!
I've tried the plus-minus function, but can't get the min or max element values. I suspect this is because the result isn't a maxtrix:
marks2c, As an alternative to Davide's plugin, you can type the following as a native solution: KeyPress: Code:R1.tot:str2num(strrep(num2str(R1.tot),"sys","mat"))
This should have the effect of changing the your vector into a matrix. As such, you will be able to use lowercase min() and max() Edited by user 01 April 2022 01:03:20(UTC)
| Reason: Spelling Error |
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 01/04/2020(UTC) Posts: 85 Location: Wellington Was thanked: 4 time(s) in 3 post(s)
|
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,439  Was thanked: 890 time(s) in 566 post(s)
|
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 01/04/2020(UTC) Posts: 85 Location: Wellington Was thanked: 4 time(s) in 3 post(s)
|
Thank you so much. I shall dig in and do some more learning. Very greatly appreciated.
The RMM uncertainty is a very poor 'rule of thumb' estimate of the input impedance error based on the meter's measurement accuracy (aka a meter should be 10x more accurate than the thing it is measuring).
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,439 Was thanked: 890 time(s) in 566 post(s)
|
Ah, yes. You're right. In such a case, these would be the final results  Best regards. Alvaro.
|
|
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 983 time(s) in 811 post(s)
|
Originally Posted by: Kenny Lemens I've tried the plus-minus function, but can't get the min or max element values Confirmed 10 x more accurate In Process Control Instrumentation we calibrate pressure XTR's from Secondary Standard Wallace Tiernam We have two WT ... alternate calibrate to Ottawa Primary Standard Your ± exposed in the attached. Cheers ... Jean.  Stat Incertitude.sm (22kb) downloaded 6 time(s).
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 01/04/2020(UTC) Posts: 85 Location: Wellington Was thanked: 4 time(s) in 3 post(s)
|
Thanks Jean. The 10x thing is sound. The unsound bit is my use of MM accuracy to infer the uncertainty of the input impedance (aka a poor estimate). One thing I've been meaning to check... Originally Posted by: Jean Giraud Originally Posted by: marks2c I'd not seen Jean's operator-overloading of the units. That isn't something I'd want to do. Original idea from Mathsoft Advisor. Used when no units exist, id:T/hr [Ton/hr mas flow] SI is largely incompatible Process Control Instrumentation. We do process control here in Newzild using SI units. In other parts of the world they even do it quite well (LHC, EUV lithography, LIGO etc). What is it that SI units are missing? Apologies in advance: I'm actually intetrested, rather than just kicking the hornet's nest.
|
|
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 983 time(s) in 811 post(s)
|
Originally Posted by: marks2c We do process control here in Newzild using SI units I do as well as long as things are converted/compatible Per say mass flow rate [T/hr] depends upon some SI constants. 
|
|
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 983 time(s) in 811 post(s)
|
Originally Posted by: marks2c We do process control here in Newzild ... If you have general or specific interest in that stuff please, let me know: I have a huge Compendium.Cheers ... Jean
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 01/04/2020(UTC) Posts: 85 Location: Wellington Was thanked: 4 time(s) in 3 post(s)
|
Thank you for the kind offer, I have emailed.
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 01/04/2020(UTC) Posts: 85 Location: Wellington Was thanked: 4 time(s) in 3 post(s)
|
Back to the SI units and process control: is the issue with SI units the imperial units?
That seems odd, as the imperial units now have SI definitions (ie imperial measurements are actually metric, but converted to imperial representations).
|
|
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 983 time(s) in 811 post(s)
|
Originally Posted by: marks2c Back to the SI units and process control: is the issue with SI units the imperial units ? In Process control, steam is accounted in mass flow typical T/hr. Chemical mixture: ingredients are in mass flow as well as water ... All that +++ in °C except sub-cryogenic °K. In short, SI is not a compatible Engineering System. Between the temperature detector(s) and the reading, there is a lot of maths to linearize from so few EIT reference points. Cheers ... Jean.
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 23/07/2013(UTC) Posts: 1,166 Was thanked: 529 time(s) in 355 post(s)
|
Originally Posted by: Jean Giraud In short, SI is not a compatible Engineering System. This is maybe the most bizarre, absurd, meatheaded, uninformed babblement came out of Jean's twisted mind. He single-handedly trashed a working unit system near about a century. What is his replacement for SI? Same units named with additional single quote and each one of them has value of 1. He just don't like units and maniacally spread disinformation about them. Jean's science comprehension is from 1000 BC. He claims only numbers are enough. He should use matlab or excel or only his TI-84. SMath is not suitable for him. Dear marks2c, SI units are capable enough. Even imperial system units are defined by SI now. In SMath they may need some workarounds, especially temperatures, but they are competent. And as far as I know nothing is wrong with units in SMath, concerning about their definitions. Regards.
|
 1 user thanked overlord for this useful post.
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 983 time(s) in 811 post(s)
|
In that example of 100's Orifice Plate, all process data are given by the Chemical Engineering team in Engineering Units. The Consulting Instrumentation Engineer do two things: 1. best find "ΔP[Pa] ... User XTR" to minimize the models XTR's. 2. calculate the the bore diameter for all 100's plate. On the turnkey day of the multi billions $ Plant, SI is not invited. 
|
|
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 983 time(s) in 811 post(s)
|
EIT90 fixed points [EIT = Echelle Internationale de Temperature]. 
|
|
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 23/07/2013(UTC) Posts: 1,166 Was thanked: 529 time(s) in 355 post(s)
|
Originally Posted by: Jean Giraud On the turnkey day of the multi billions $ Plant, SI is not invited. Because they have an incompetent engineer who doesn't know how to work with units. And there are trillion dollars of work done with using SI units, which sane persons do. Instead of using SI units, Jean uses stupid coefficients (0.3537, 3.9989, etc). Funny part is there are SI units everywhere on that example. (kg, °C, bar, Pa, mm) Using unnecessary numbers doesn't eliminate them actually. You are just holding your left ear with your right hand. Look the example below Jean. It is much more readable, deprived of unnecessary convert numbers. And more flexible too. I can use psi for pressure, easily change diameter to inch, revise temperature to K effortlessly. Actually V in your example is indeed m/s, you just don't know that you don't know. Some can make beta calculation with using units also. I just don't have the willpower. 
|
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
