Select Page: Previous 1 2 3 4 5 6 7 8 9 10 11 Next
Control.com topic...
Process Control
Topic: Continuous process industries, DCS questions.
from the Forum department...
Interacting Pressure Loops
Originally posted by Tim on 24 January, 2014 - 11:14 am
What is the appropriate method for tuning/controlling a series of pressure loops
New Replies:
Out of curiosity: 1) How many other "multiple processes" are there and how do their...
Originally posted by El on 22 January, 2014 - 12:55 pm
Bi-Directional Flow measurement in steam transmission line
New Replies:
You could consider a high temperature ultrasonic flow meter such as the Krohne OPTISONIC 8300 ...
Depending on the brand and the exact application data; average pipe velocities on steam can be as...
what sort of steam velocities are covered by the turbine meter? > This can be done using...
Ultrasonic flow meters can also measure bi-directional flow. There are high-temperature versions...
This can be done using either an Insertion Turbine Flow meter (InFLOW, VorTek, and others) or a...
Topic: Continuous process industries, DCS questions.
from the Super frustrated. department...
Hotwell Condenser level
Posted by Chris on 20 January, 2014 - 4:20 pm
Hotwell Condenser level fluctuating.
Topic: Power generation equipment control.
from the mystery variables department...
MK IV Temp Control Curve Modification
Originally posted by Chris on 5 April, 2011 - 12:14 pm
GE has changed our 3rd stage seals and needs to change our control constants (temp curves) and the FSR Peak curve change doesn't make sense to me and I'm hoping to learn something in my efforts to make that make sense to me.
New Replies:
Xc is the pressure ratio. ...
Topic: Continuous process industries, DCS questions.
from the Instrument department...
Pressure control valve
Originally posted by Mic on 16 January, 2014 - 8:26 am
Pressure control valve works well when isolated, but after opening does not close to 0%
New Replies:
Agree with d. Most likely cause is the undersizing of the actuator. Try using a booster in...
that is a common actator problem for high pressure drop services, thats whay it works when isolated...
Topic: Sensor technologies.
from the Engineering department...
Help me find a suitable speed sensor
Originally posted by arocon on 10 January, 2014 - 1:27 pm
I need to install a speed sensor in a roll in tandem cold mill and with 4 to 20 mA output to connect with PLC.
New Replies:
For mining applications measuring the high speed spokes in large pulleys I used to specify a...
I'm no expert here but the first question I would ask is is there any exposed shaft visible or...
Topic: Continuous process industries, DCS questions.
from the OSI vs. Aspen department...
OSI Pi versus Aspen Info Plus 21
Originally posted by holger on 6 July, 2010 - 6:22 am
Chemical company with batch processes has to decide if they buy Aspen tech or OSI.
New Replies:
Dear Jody, We are an Aspen Tech ISP (Implementation service Partner) from India, capable of...
Topic: Sensor technologies.
from the Intrument department...
Orifice flow
Originally posted by Vimal Gupta on 16 November, 2013 - 9:41 am
Spray water flow transmitter shows reading after spray control valve opening above 60%. Below 60% valve opening, flow in Tx shown zero.
New Replies:
could you please tell me the following: flow transmitter's cell maximum range? calibration...
Originally posted by Mark on 7 January, 2014 - 11:34 am
Confirm native communications capability between RXi controllers
New Replies:
Wow, I totally missed the new Rxi. I asked around and merely confirmed what you know, no EGD...
> I'm not an RX3i user or expert, but I'm pretty sure you > can do controller to controller...
I'm not an RX3i user or expert (I'm a Mark VIe guy), but I'm pretty sure you can do controller to...
> Need to confirm that the only way for a brand new 2013 RXi Controller can communicate with...
Topic: PLCs and related questions.
from the gad trubine control system department...
moog servo valve operation
Originally posted by VK on 1 November, 2012 - 10:30 am
How does a MOOG servo valve operate?
New Replies:
Antonio Perez, You are most welcome, and thank you for taking the time to say thanks!...
Thanks alot CSA for taking the time to share your knowledge and experience with us, my respects to...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Line monitoring with IS isolators
Posted by Arsalan on 13 January, 2014 - 3:14 am
MTL isolators and line monitoring for digital inputs and outputs
Originally posted by xxxx on 11 January, 2014 - 7:54 am
Difference between transmitters and local gauges
New Replies:
The transmitter is necessary for remote monitoring, logging, interlocks, automatic control, etc. ...
One has wiring the other does not. But the reality is that the transmitters can be read...
Posted by jon fukuki on 11 January, 2014 - 10:38 am
Forced balance temperature transmitter calibration
Topic: Engineering and workplace issues.
from the Control Valve Installation Engineering department...
API 553 Clause Interpretation
Posted by Kaushal Shah on 9 January, 2014 - 4:42 am
API 553 clause interpretation on valve body size
Topic: Sensor technologies.
from the Process department...
Sentronic analog valve
Posted by GowriS on 8 January, 2014 - 11:38 am
Calibration & Feedback of Sentronic analog valve.
Topic: Continuous process industries, DCS questions.
from the Active X department...
Codesys 2.3 Graph XY ActiveX
Posted by Jerome MAZET on 7 January, 2014 - 2:47 pm
Graph XY active X in Codesys 2.3
Topic: Engineering and workplace issues.
from the HVAC/Boiler control department...
HVAC/Boiler help/advice
Originally posted by IT guy on 18 December, 2013 - 11:01 am
Independent school in the country (Canada) needs help/advice for HVAC/Boiler system
New Replies:
Oh my, very sorry I missed this. I thought I would have received an email if anyone replied. ...
Topic: Sensor technologies.
from the Instrumentation department...
Question about Number of Radar LT in one tank
Posted by Sakthi venkatesh on 3 January, 2014 - 7:34 am
when all the four radar LT in one tank emit radar signals, Does it affect near Transmitters?
Topic: Power generation equipment control.
from the Business Development department...
OEM suppliers
Posted by Rachel on 3 January, 2014 - 7:15 am
I am looking for OEM /supplier of GE, Alstom, ABB and Siemen Westinghouse
Topic: Continuous process industries, DCS questions.
from the Process Control department...
Watlow F4 not being detected
Originally posted by Paul on 29 November, 2013 - 9:39 am
Watlow F4D will communicate with one computer but is not detected on another.
New Replies:
If I disable the internal (on-board) com ports, (and even if I don't) yes, I can set it to COM1....
Topic: PLCs and related questions.
from the Water Treatment department...
Sodium Hypochlorite injection Control Help
Posted by jmonter on 2 January, 2014 - 3:25 am
I currently have a job with a customer that wants to operate an injection pump for Sodium Hypochlorite injection using a PID.
Topic: Power generation equipment control.
from the Forum department...
Nozzles Sticking at One Position.
Originally posted by causeur on 31 December, 2013 - 2:40 am
On our MS-5002c gas turbine nozzles stick in 1.3 degrees and stop there.
New Replies:
Troubleshooting is quite often a process of logical troubleshooting. It is logical to question the...
good morning, thank you CSA for your helpful response. we have made a standard MI, and we did...
Good morning to you! The problem started after a Major Inspection "revision." What is...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Is the system stable ?
Originally posted by Miller on 26 December, 2013 - 11:27 am
Please tell me if the system with following open loop transfer function is stable? Marginally stable? Or unstable?

H(s) = 1/(s*(s+2))
New Replies:
If the input is a step in time, then this input in Laplace domain is 1/s. So the output (or...
There is no need to do any transformations etc.: H(s) = 1/(s*(s+2)) can be written as H(s) = (1/s)...
If you are talking about stability, you have to know or define exactly what that means first. This...
Miller... by now you should have ploted the h(t) equation! Note that the time-function meets...
"Please tell me if the system with following open loop transfer function is stable? " ...
Miller... Plot it! Phil...
> you can only consider "stability" in a traditional sense where you have feedback. ...
Topic: Power generation equipment control.
from the Forum department...
Barton 764 nuclear grade level transmitter
Posted by Rob Clark on 30 December, 2013 - 12:54 pm
Just replaced an old Barton 764 nuclear grade level transmitter. Now I have a transmitter installation question.
Select Page: Previous 1 2 3 4 5 6 7 8 9 10 11 Next
 
 

Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2014 Nerds in Control, LLC. All rights reserved.

Users of this site are benefiting from open source technologies, including PHP, MySQL and Apache. Be happy.


Fortune
All this wheeling and dealing around, why, it isn't for money, it's for
fun. Money's just the way we keep score.
Advertise here
Advertisement
our advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive