Re: [foxboro] flowrate

Dirk,
I'm not sure I understand.  Could you clarify a bit?

You do not have flow measurements, but you are using AIN blocks and
averaging values every five minutes.  What values are coming in through
your AIN blocks?

Are you trying to get a running five-minute average flow rate?


Chuck Jones
Automation Technologist
Tate & Lyle -- Lafayette South Plant
765.477.5324 - Office  | 765.586.5290 - Cell




-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Pauwels, Dirk - RSM
Sent: Friday, July 14, 2006 9:14 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] flowrate


We haven't got any flow measurements, but we're using ain and ind blocks
to calculate a flowrate. We take value snapshots every x sec's and
calculate average every 5 min's or so. This is not accurately enough. Is
anyone of you using some accurate calculation to accomplish this? I've
been experimenting with accum blocks, but can't get an acceptabel
accurracy
=20
Thanks & Rgds,
=20
Dirk Pauwels - DCS/MOC coordinator=20
Engineering dept.
Hexion Specialty Chemicals
E mail: dirk.pauwels@xxxxxxxxxxxxxx
T=2E  +32.(0)3.570.95.97
F=2E  +32.(0)3.570.16.09
Mob. +32.(0)497.428.300
=20
=20
=20
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
=20
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Djoin
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Dleave
=20
***************************************************************************=
**************************
This email and any files transmitted with it are confidential and intended =
solely for the=20
use of the individual or entity to whom they are addressed. If you are not =
the intended=20
recipient or the person responsible for delivering the email to the intende=
d recipient, be=20
advised that you have received this email in error that any use, disseminat=
ion,=20
forwarding, printing, or copying of this email is strictly prohibited.  If =
you have received=20
this email in error please notify the sender immediately. Please note that =
we reserve=20
the right to monitor and read any emails sent and received by the Company i=
n=20
accordance with and to the extent permitted by applicable legal rules.
***************************************************************************=
**************************
 
 
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave

Other related posts: