from the Forum department...Interacting Pressure Loops
What is the appropriate method for tuning/controlling a series of pressure loops
My apologies for my delayed response. Apparently, I must subscribe to my own thread to get the...
By Bruce Thompson on 24 January, 2014 - 5:21 pm -
Out of curiosity: 1) How many other "multiple processes" are there and how do their...
from the Instrument department...Bi-Directional Flow measurement in steam transmission line
Bi-Directional Flow measurement in steam transmission line
By icenta Controls on 24 January, 2014 - 5:03 am -
You could consider a high temperature ultrasonic flow meter such as the Krohne OPTISONIC 8300 ...
By John Catch on 23 January, 2014 - 6:26 pm -
Depending on the brand and the exact application data; average pipe velocities on steam can be as...
By d- on 23 January, 2014 - 9:37 am -
what sort of steam velocities are covered by the turbine meter? > This can be done using...
By Joerg on 23 January, 2014 - 6:41 am -
Ultrasonic flow meters can also measure bi-directional flow. There are high-temperature versions...
By John Catch on 22 January, 2014 - 5:54 pm -
This can be done using either an Insertion Turbine Flow meter (InFLOW, VorTek, and others) or a...
from the Super frustrated. department...Hotwell Condenser level
Hotwell Condenser level fluctuating.
from the mystery variables department...MK IV Temp Control Curve Modification
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.
By GE lover on 19 January, 2014 - 4:50 pm -
Xc is the pressure ratio. ...
from the Instrument department...Pressure control valve
Pressure control valve works well when isolated, but after opening does not close to 0%
Agree with d. Most likely cause is the undersizing of the actuator. Try using a booster in...
By d- on 16 January, 2014 - 12:39 pm -
that is a common actator problem for high pressure drop services, thats whay it works when isolated...
from the Engineering department...Help me find a suitable speed sensor
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.
By Roy Matson on 15 January, 2014 - 1:55 pm -
For mining applications measuring the high speed spokes in large pulleys I used to specify a...
By albalcombe on 14 January, 2014 - 6:58 pm -
I'm no expert here but the first question I would ask is – is there any exposed shaft visible or...
from the OSI vs. Aspen department...OSI Pi versus Aspen Info Plus 21
Chemical company with batch processes has to decide if they buy Aspen tech or OSI.
By Indrajeet Pawar on 15 January, 2014 - 8:13 am -
Dear Jody, We are an Aspen Tech ISP (Implementation service Partner) from India, capable of...
from the Intrument department...Orifice flow
Spray water flow transmitter shows reading after spray control valve opening above 60%. Below 60% valve opening, flow in Tx shown zero.
By Omar on 15 January, 2014 - 12:27 am -
could you please tell me the following: flow transmitter's cell maximum range? calibration...
from the Forum department...RXi Processor to RXi Processor Communications
Confirm native communications capability between RXi controllers
By Demigrog on 13 January, 2014 - 4:57 pm -
Wow, I totally missed the new Rxi. I asked around and merely confirmed what you know, no EGD...
By Tye on 10 January, 2014 - 1:57 pm -
> I'm not an RX3i user or expert, but I'm pretty sure you > can do controller to controller...
By Demigrog on 9 January, 2014 - 4:29 pm -
I'm not an RX3i user or expert (I'm a Mark VIe guy), but I'm pretty sure you can do controller to...
By Russ B on 8 January, 2014 - 12:04 pm -
> Need to confirm that the only way for a brand new 2013 RXi Controller can communicate with...
from the gad trubine control system department...moog servo valve operation
How does a MOOG servo valve operate?
Antonio Perez, You are most welcome, and thank you for taking the time to say thanks!...
By Antonio Perez on 13 January, 2014 - 1:34 am -
Thanks alot CSA for taking the time to share your knowledge and experience with us, my respects to...
from the Forum department...Line monitoring with IS isolators
MTL isolators and line monitoring for digital inputs and outputs
from the Forum department...Transmitters and Gauges in Processing Plants
Difference between transmitters and local gauges
By Steve Myres on 11 January, 2014 - 10:07 pm -
The transmitter is necessary for remote monitoring, logging, interlocks, automatic control, etc. ...
By d- on 11 January, 2014 - 8:31 am -
One has wiring the other does not. But the reality is that the transmitters can be read...
from the Forum department...Forced balance temperature transmitter span calibration
Forced balance temperature transmitter calibration
from the Control Valve Installation Engineering department...API 553 Clause Interpretation
API 553 clause interpretation on valve body size
from the Process department...Sentronic analog valve
Calibration & Feedback of Sentronic analog valve.
from the Active X department...Codesys 2.3 Graph XY ActiveX
Graph XY active X in Codesys 2.3
from the HVAC/Boiler control department...HVAC/Boiler help/advice
Independent school in the country (Canada) needs help/advice for HVAC/Boiler system
Oh my, very sorry I missed this. I thought I would have received an email if anyone replied. ...
from the Instrumentation department...Question about Number of Radar LT in one tank
when all the four radar LT in one tank emit radar signals, Does it affect near Transmitters?
from the Business Development department...OEM suppliers
I am looking for OEM /supplier of GE, Alstom, ABB and Siemen Westinghouse
from the Process Control department...Watlow F4 not being detected
Watlow F4D will communicate with one computer but is not detected on another.
If I disable the internal (on-board) com ports, (and even if I don't) yes, I can set it to COM1....
from the Water Treatment department...Sodium Hypochlorite injection Control Help
I currently have a job with a customer that wants to operate an injection pump for Sodium Hypochlorite injection using a PID.
from the Forum department...Nozzles Sticking at One Position.
On our MS-5002c gas turbine nozzles stick in 1.3 degrees and stop there.
Troubleshooting is quite often a process of logical troubleshooting. It is logical to question the...
By causeur on 1 January, 2014 - 2:36 am -
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...
from the Forum department...Is the system stable ?
Please tell me if the system with following open loop transfer function is stable? Marginally stable? Or unstable?
H(s) = 1/(s*(s+2))
H(s) = 1/(s*(s+2))
By John M. Correa on 30 December, 2013 - 5:31 pm -
If the input is a step in time, then this input in Laplace domain is 1/s. So the output (or...
By Hans H. Eder on 30 December, 2013 - 8:56 am -
There is no need to do any transformations etc.: H(s) = 1/(s*(s+2)) can be written as H(s) = (1/s)...
By Gerrit on 30 December, 2013 - 6:40 am -
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...
By d- on 28 December, 2013 - 2:02 pm -
"Please tell me if the system with following open loop transfer function is stable? " ...
from the Forum department...Barton 764 nuclear grade level transmitter
Just replaced an old Barton 764 nuclear grade level transmitter. Now I have a transmitter installation question.
Among economists, the real world is often a special case.