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Process Control
Topic: Continuous process industries, DCS questions.
from the Instrumentation and Control department...
Calculating Pressure Transmitter Range
Originally posted by Kamaraj on 21 August, 2014 - 7:42 am
How can we test Rangeability of Pressure Transmitter?
New Replies:
The word 'Turndown' is used in two ways. One use of the word turndown is to define how far a...
Dear Mr.David, In your Last Post you wrote that At 7 bar pressure, the reading could be 6.65...
The term in "FSO" in your spec means (percent) of full scale uncertainty. My selection...
Dear Mr.David, what you have wrote about NaK pressure Transmitter is Correct. My Ke2 model...
Dear Mr.Ashiq, NaK filled transmitter is pressure transmitter used for high temperature...
A colleague informed me that an NaK transmitter is a pressure transmitter with a local fill fluid...
The definition you found is a correct definition of rangeability. I have no idea what a NaK...
Hello Mr. Ashiq, Thanks for your information.. The transmitter output is 4-20mA only. when...
what is the output of this transmitter? suppose its output is 04-20 mA than zero and span would...
Posted by Paul Kraemer on 26 August, 2014 - 2:12 pm
Supply and exhaust air handling control method evaluation.
Topic: Continuous process industries, DCS questions.
from the Eurotherm 3504 department...
Controller Watch Dog and Output Loop Failure Detection
Originally posted by Mike divine on 22 August, 2014 - 5:32 am
Challenges with achieving the processor watchdog and output loop failure functionality with Eurotherm 3504.
New Replies:
Thanks for your reply. I am currently working on the design....
Those are fairly easy to code around with most processors. An external time delay relay that you...
Originally posted by Sarmad on 21 January, 2011 - 6:33 am
Viability of exporting DCS (Ovation) data to a third party over a wireless (serial) link using OPC server.
New Replies:
Dear Sarmad At our CCPP output from DCS is given to AB PLC and through SCADA. we send &...
Sarmad, Were you able to get a solution for your requirement? Regards, Arif > Thanks....
Originally posted by Ashiq on 29 May, 2014 - 5:38 am
re-configure Solatron 7951 flow computer.
New Replies:
Dear Mr. JMW Thanks for your information yes i am trying to configure via the front panel...
> corrected volumetric flow calculation from indicated volumetric flow in solatrom flow computer...
Topic: Sensor technologies.
from the South Facing Wall department...
0 - 10v Sensor Output Spikes or Dips Periodically
Posted by Snake on 23 August, 2014 - 12:36 pm
0-10v sensor output not as stable as I'd like
Topic: Continuous process industries, DCS questions.
from the Forum department...
Lime slurry density meter
Originally posted by mechanation on 6 June, 2014 - 11:31 am
We are trying to measure density of our lime slurry which approx 22% solids
New Replies:
Vibrating element density is a good approach for slurries but care to be taken over the % and the...
Topic: PLCs and related questions.
from the instrumentation department...
solartron 7915 flow computer
Originally posted by amir qadri on 25 June, 2014 - 11:02 am
solartron flowcomputer 7915 showing error message bad ram checksum error, but it is working normal, printer is continuous writing, bad checksum error.
New Replies:
Suggest you contact Les Hancock support engineer of Emerson. You can find him on linkedin and he...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Westinghouse WDPF System
Originally posted by snitz50 on 31 March, 2009 - 11:42 am
What kind of processor is the Westinghouse WDPF and what is its intended use?
New Replies:
Did you get any information about WDPF systems migration? > I am writing my bachelor thesis...
Topic: Continuous process industries, DCS questions.
from the Chemical Engineering department...
PI Controller on a Reactive Distillation Column
Posted by Seyed Soheil Mansouri on 21 August, 2014 - 6:46 am
Tuning a PI controller for a dynamic reactive distillation column model.
Topic: Continuous process industries, DCS questions.
from the Heads, flows, pumps & motors combined department...
Pipe sizing for fluids and pump/motor selection
Originally posted by Eric on 20 August, 2014 - 5:14 pm
How do you select pipe size, metal as well as corresponding pump type with motors for process industry?
New Replies:
There are well known formulas for determining pressure drop across valves and thru piping and...
Posted by Eric on 20 August, 2014 - 5:34 pm
Selection process for gearboxes & chain for conveyors & packaging machines
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:
go for GE Proficy Historian, Best in solution and pricing as well.......
Topic: Power generation equipment control.
from the Forum department...
PX_VIB_GAIN in Mark V
Originally posted by anonymous on 12 May, 2009 - 12:16 am
how PX_VIB_GAIN in mark V works?
New Replies:
I was on-site and had a look at this. The gain change was NOT a function of speed as the machine...
Perhaps GE has set the gain to vary with shaft rotative speed to create a sort-of parametric...
Topic: Application Questions and Problems
from the Instrumentation and Control department...
Replacing a Ball Valve with a Different Control Valve
Originally posted by Kamaraj on 19 August, 2014 - 5:47 am
how can we replace mechanically ball valve into electric or pneumatic valve?
New Replies:
few possibilities, you need to replace the valve, or at least contact the manufacturer of the...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Control Valve Position Command Signal
Originally posted by Gary on 11 August, 2014 - 2:28 pm
Looking for a device that generate control valve position signal for open loop control
New Replies:
the correct terminology is Remote/Local for the Setpoint Adjustments Auto/Man for automatic...
I think Roy got it - manual station. I thought almost any PID controller had an auto/manual or...
I believe you are looking for a Manual Loading Station, I haven't seen one for years. If you are...
just put your controller in manual and adjust the output > I need to manipulate a control...
This post of mine is not related to my other post about the integrating actuator TM-55. Sorry for...
Gary, If you are wanting to "...manipulate [the integrating] control valve's...
Most control valves are available with a positioner. Provide an analog signal (0-10V or 4-20mA for...
Topic: Continuous process industries, DCS questions.
from the Operation department...
Lube oil temperature and bearing vibration
Originally posted by lock_out on 12 June, 2007 - 10:33 pm
Is there any correlation between lube oil temperature and bearing vibration?
New Replies:
Check if you changed the OIL PUMP (attached to the turbine axis) during your last shut down. If you...
Topic: Power generation equipment control.
from the Mechanical department...
Atomizing air cooler modification
Originally posted by Izhar on 9 August, 2014 - 3:29 am
Atomizing Air Cooler Modification
New Replies:
> Power Saved in kWhr = (Main AA Comp Power rating in kWhr)*(Turbine running hours) > This...
Izhar, Power Saved in kWhr = (Main AA Comp Power rating in kWhr)*(Turbine running hours) This...
Izhar, What are each of the columns in the data? I see "GT," "Fr,"...
CSA/SB Thanks a lot for your inputs. CSA I really appreciate your responses. I am really sorry,...
I want to add my two cents. >> How would I be able to by pass the AA system as we are...
Topic: Continuous process industries, DCS questions.
from the Instrumentation and Control department...
Understanding Run Back in Burner Management System
Posted by fluidflow on 16 August, 2014 - 11:13 am
What is Run Back in a Boiler Operation?
Originally posted by MPAC on 15 August, 2014 - 1:29 pm
What is the difference between a Mark V type 'A' and a type 'B' Panel? Can you tell by looking at it?
New Replies:
MPAC, No; one can't tell from looking at the outside of the panel, or even by opening the doors...
Topic: Software, including programming, OS issues, etc.
from the urgent department...
Honeywell DCS & ESD Load Calculation
Posted by mostafa qasemi on 13 August, 2014 - 2:02 pm
CPU load calculation for control modules (in C300).
Posted by Gerald Beaudoin on 13 August, 2014 - 12:09 pm
A manufacturer of a valve and actuator specs the life at 2 million cycles and defines a cycle as 0-90 % movement. If a valve sits all day oscillating around 50-60, what constitutes a cycle for preventative maintenance purposes?
Posted by Benjamin on 12 August, 2014 - 3:39 pm
I need advice about a gas processing plant I'm trying to design, as an exercise.
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