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Process Control
Originally posted by kwaku on 12 December, 2013 - 12:15 pm
white thick smoke coming from exhaust during start-up and shutdown.
New Replies:
Nice contribution and comment.....
I had almost the same issue but it was duel fuel and it was happen only when operating on liquid...
Topic: Continuous process industries, DCS questions.
from the Automation List department...
Electromagnetic flow meter problems
Originally posted by karthick on 12 May, 2014 - 3:47 am
Totalizer reading on electromagnetic flow meter of chemtrols errors.
New Replies:
Most, if not all, flow meters have a setting called something like "Low flow cutoff". ...
Topic: Sensor technologies.
from the Forum department...
Measuring Flow with Annubar
Originally posted by hknclk on 11 May, 2014 - 9:36 am
Should pipeline be full of water for measuring flow with annubar?
New Replies:
To get a flow reading that is meaningful, the pipe needs to be full of liquid. The requirement...
it will be a meaningless measurement, so you might as well remove it or disconnect the...
Originally posted by Glenn on 9 May, 2014 - 1:03 am
Is it a violation to use the same instrument for boiler protection and boiler control (e.g. drum level)?
New Replies:
You should not use the same sensing elements and / or final elements for a trip as are used for...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Economizer Function in a Boiler
Originally posted by Jorge Penagos on 23 July, 2012 - 8:11 pm
Function of Economizer in a Boiler
New Replies:
> What is the function of the Economizer in a Boiler? the economizer is a steam generation...
Topic: Continuous process industries, DCS questions.
from the Forum department...
pulse scale factor
Originally posted by Hoo on 8 May, 2014 - 3:41 am
pulse scale factor
New Replies:
Generally you want the most pulses you can get. Sometimes this is limited by how fast the flow...
Originally posted by PT on 6 May, 2014 - 5:23 am
Reading IEEE little endian format data
New Replies:
By Helmut Ritter on 8 May, 2014 - 12:01 pm -
Modbus only defines values up to 16 bit (size of a register or holding register). As soon as you...
Are here any values in the system that are in a known range? I'm thinking something like base...
This is not unique to big/little endian. They are called "Floating Point" because the...
Originally posted by hatimnazir on 6 April, 2014 - 7:10 am
Honeywell Experion DCS Analog Output Card Failed. Output went to initialization states. Points analog output blocks gone inactive. Action changed for some valves in configuration.
New Replies:
Similar problem we had faced in Honeywell EPKS 300 system and also recently upgraded to EPKS 400. ...
Topic: Power generation equipment control.
from the Deciding on the right transmitter department...
Mark V Scan rates
Originally posted by William Monson on 5 May, 2014 - 1:04 pm
How can the scan rate on the SCADA and the Response time of the transmitter be knitted together?
New Replies:
William Monson, SMART transmitters are NOT recommended for: 1) P2 pressure sensing 2) CPD...
Topic: Sensor technologies.
from the Communication department...
how to detect over pressure
Originally posted by tapas on 1 May, 2014 - 5:27 am
Sensor for detecting if pressure is out of 4 to 6 bar inside a pneumatic pipe
New Replies:
Thank you for your reply....
Google "industrial pressure switch". You'll need a switch assembly (sensor and...
Posted by bmrinell on 1 May, 2014 - 1:29 pm
Reading ASCII Data from Weigh Bin Scale with Quantum Unity Pro and 140 ESI 062 010 Card
Topic: Continuous process industries, DCS questions.
from the Forum department...
Formula for Chemical Dosing
Posted by Fred Ramos on 30 April, 2014 - 11:19 pm
formula to use for Calcium Nitrate concentration?
Posted by WSNIA'14 Organizing Committee on 30 April, 2014 - 11:11 am
Call for Papers/Posters: 2014 International Workshop on Wireless Sensor Networks for Industrial Applications (WSNIA-2014), August 17-20, 2014, Niagara Falls, Ontario, Canada.
Topic: Continuous process industries, DCS questions.
from the Forum department...
Comparing steam flow and feedwater flow
Originally posted by MattQ on 27 April, 2014 - 2:33 pm
Looking to find out how a comparison of feedwater flow and steam flow is made.
New Replies:
It was a lot easier during the 'G'olden years when all we had to do was add a capacitor to the...
research project? Gee, this sort of change has been routine for the last thirty years, where...
You're not going to be able to maintain a perfect mass balance - for 2 reasons. First, the feed...
What I'm doing is a research project that entails changing a single-element to three-element...
As long as you compare mass flows they can be compared. So you have to compensate the steam flow...
I don't know why you feel that the flow rates cannot be compared directly as they have different...
Topic: Human-Machine Interface and SCADA.
from the HMI Upgrade department...
ABB / Bailey Conductor NT
Originally posted by Anthony Porter on 28 April, 2014 - 6:45 pm
Upgrading from Conductor NT 6.0 to Symphony Plus?
New Replies:
I'm hearing that they have a SODG graphic conversion tool that is VERY clean. I think that the tool...
Posted by PC Tan on 27 April, 2014 - 6:51 am
Does IEC61511 allow an ESD system to be resident on a control network?
Topic: Software, including programming, OS issues, etc.
from the opc communication department...
OPC tags stop updating...start once the tags are added again
Originally posted by lalas on 24 April, 2014 - 3:54 pm
Using an OPC client, the values stopped updating after a while (20 days).
New Replies:
I tried doing it (which is disable and enable the group) when it happened again but did not work. I...
Topic: Software, including programming, OS issues, etc.
from the INSTRUMENTATION department...
UREA FLOW METER
Originally posted by Arun Kumar on 14 April, 2014 - 4:20 pm
What type of flowmeter can be installed in a Urea duct as a source of FD and ID fan in the duct?
New Replies:
> What are you measuring? Just air flow? Thank you for your response. Sir, as it is a large...
What are you measuring? Just air flow? We use a DP transmitter for our prill tower air ducts....
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:
Jyshen, You are most welcome....
Dear CSA, Thanks for your superb informative response. Your passion and sincerity to share your...
Topic: Continuous process industries, DCS questions.
from the Department department...
Do I Understand PID's?
Originally posted by Piedon on 17 April, 2014 - 9:58 pm
Just want to see if I understand these things.
New Replies:
A PID controller output depends on the error between the process variable PV and a target value or...
Topic: Continuous process industries, DCS questions.
from the inst department...
Gulde control valves
Originally posted by self on 23 August, 2008 - 2:07 am
Suppliers of GULDE control valves.
New Replies:
By Dipankar Biswas on 17 April, 2014 - 11:41 pm -
> Please let me know the suppliers of GULDE make control valves. We M/s Continental Valves...
Topic: Continuous process industries, DCS questions.
from the instrumentation department...
I/P positioner and I/p transducer Control valve
Originally posted by Emerson process management on 13 May, 2012 - 4:18 am
Difference between I/P positioner and I/p transducer
New Replies:
Look at the principle of operation and internal diagrams of a Bellofram Type 1000 I/P. It does not...
hi sir, I had a question why diaphragm is not used in i/p converter? why they using the bellows?...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Instrumentation cables sizing
Originally posted by Ahmed Sami on 10 April, 2014 - 7:57 am
Instrumentation cables sizing
New Replies:
Dear Ahmed Sami, Your question is incomplete I can say. Cable cross section and hazardous area...
Ahmed Sami, Choosing wire/cable for a particular application is a very involved process. Does...
Topic: Engineering and workplace issues.
from the Level Control department...
Magnetorestrictive Level Transmitter issues
Originally posted by Braindead on 26 March, 2013 - 11:46 pm
Extreme vibration and loss of signal on level transmitters
New Replies:
Hi Mateus, there is only one instrument when you are working offshore on a FPSO or Platform...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Actuator indication and control
Originally posted by David Sutcliffe on 11 April, 2014 - 10:32 am
How to obtain indication and control from a Rotork actuator
New Replies:
Other types of actuators use two drive signals: - one signal drives the actuator 'open' - the...
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