Posts from...
Today, Sunday, November 23, 2014
Topic: Engineering and workplace issues.
from the Maintenance department...
Supplying Generator Rotor Using Carbon Brushes
Originally posted by Saudaslam on 16 November, 2014 - 5:35 am
why we give supply generator rotor DC directly through carbon brushes instead of exciter?
New Replies:
309Eguy, It's virtually impossible the measure the output of the rotating diode wheel of a...
An advantage of a brushless exciter is better control of the generator under fault/transients...
Saudaslam, you're very welcome....
Topic: Power generation equipment control.
from the Forum department...
Gas Turbine Startup Problem
Originally posted by Vinayak on 7 November, 2014 - 10:08 am
IGV not opening during startup of Gas Turbine
New Replies:
Vinayak, Contrary to popular belief the IGV actuator is actually trying to keep the IGVs from...
The position was checked physically and there was physical gap. The cylinder was not opened to...
Topic: Engineering and workplace issues.
from the Tap-Changing like Tap Dancing, i.e., department...
Physics of ... Tap-Changer
Originally posted by Phil Corso on 17 November, 2014 - 10:57 am
The question is asked often, but never a viable answer!
New Replies:
Correction: ∠θrš of Exercise 2 should be 0.00...
Originally posted by Lars Spurkland on 18 November, 2014 - 2:40 pm
I need to select a meter capable of measuring measuring the flow rate in a 6 inch gravity sewer line, prior to the wastewater treatment plant
New Replies:
I would think Siemens Milltronics Ultrasonic transmitter. The municipality I live in uses these...
Topic: Continuous process industries, DCS questions.
from the INSTRUMENTATION department...
Foundation Fieldbus Instrument Simulation
Originally posted by habeeb on 15 June, 2012 - 2:24 am
how we can simulate any ff transmitter with a field communicator (0 - 100%) without injecting process variable?
New Replies:
> Usually devices have a hardware protection jumper that you need to set > to enable...
There is a book published by ISA: ...
Topic: Power generation equipment control.
from the Technical department...
Exhaust Temperature spread
Originally posted by ESKAY on 25 July, 2010 - 3:51 am
Allowable spread calculation
New Replies:
where is my mistake? please explain. > you are using different temperature scales, maybe...
Topic: Human-Machine Interface and SCADA.
from the Forum department...
Making an HMI with borland delphi
Originally posted by David on 10 January, 2011 - 12:43 am
how to make a HMI using borland delphi 7
New Replies:
> Delphi has been used in some interesting engineering stuff! There has been...
Topic: Sensor technologies.
from the Instrumentation department...
Calibration
Originally posted by Rajendra on 10 December, 2013 - 1:36 am
Doubts regarding the calibration and operation of smart type transmitters
New Replies:
These three aspects of smart transmitter calibration are explained in the tutorial found here: ...
Topic: Software, including programming, OS issues, etc.
from the Communications department...
How do OPC works?
Originally posted by Daniel on 23 January, 2014 - 9:09 am
How do OPC works and what are the differences with other protocols?
New Replies:
Learn about OPC and other software technologies used in automation from the "Software for...
Topic: Sensor technologies.
from the instrumentation department...
transmitter calibration
Originally posted by NVQ on 6 March, 2014 - 1:49 am
General procedure for sensor trim of transmitter
New Replies:
I agree with Geir You get the best accuracy if you do sensor trim at LRV and URV Learn more...
Originally posted by GTENG on 19 November, 2014 - 11:53 pm
Mark V speedtronic for GTG control trips when "R" computer automatically reboots.
New Replies:
GTENG, Further to the above, the issue with L4ETR1 does concern me. But, something one needs to...
Hi! GTENG, The overwhelming majority of the time when the turbine trips while testing the...
Topic: Computers in manufacturing; also hardware discussion.
from the Forum department...
Foundation Fieldbus - Linearization Type
Originally posted by Derrick on 25 May, 2014 - 9:17 pm
Foundation Fieldbus Linearization Type
New Replies:
When you use "direct" the ranges/scales (XD_SCALE and OUT_SCALE) aren't even used. ...
Topic: Communications systems and equipment.
from the Forum department...
EDDL files stored in/on device?
Originally posted by Paul Tinetti on 29 May, 2014 - 4:48 pm
Why haven't manufacturers figured out a way to store EDDL files in on-board memory of devices?
New Replies:
Not available yet. FOUNDATION fieldbus does support the capability to store the DD (EDDL) file in...
Topic: Power generation equipment control.
from the Forum department...
Gas Turbine Low CPD
Originally posted by RY on 6 November, 2014 - 9:43 pm
GT CPD dropped by 0.5 bars and 10MW.
New Replies:
RY, Yes, I did miss the word booster; my bad. But I still fail to understand how heating of the...
Hi CSA, Sorry for the lack of information. You may have overlooked the reply above. I will...
RY, I didn't respond because based on the information...
Hi CSA, I am still waiting for your feedback. Appreciate it. > Can you explain how the...
Topic: Engineering and workplace issues.
from the Eng department...
Recalibrate RTD Temperature Transmitter
Originally posted by Josh on 15 June, 2014 - 5:53 am
change calibrated range RTD temp transmitter
New Replies:
See the smart transmitter tutorial found here: ...
Originally posted by Vinay on 4 August, 2014 - 8:17 am
To be able to display a process value directly in a PC without using PC based SCADA system
New Replies:
Consider devices using the FOUNDATION fieldbus protocol: ...
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:
Terms like turndown and rangeability are explained in the smart transmitter calibration tutorial...
Topic: Application Questions and Problems
from the Automation List department...
Control Valve Cycle Measurement
Originally posted by Gerald Beaudoin on 20 August, 2014 - 8:04 am
How to measure the control valve cycles?
New Replies:
I think it goes by reversals; change in direction. Learn more about device and valve diagnostics in...
Topic: PLCs and related questions.
from the Automation List department...
PLC5 Ethernet Going to Sleep
Posted by Jeremy Pollard on 20 November, 2014 - 10:02 pm
Legacy Allen-Bradley PLC5 has intermittent communication issues.
Topic: Engineering and workplace issues.
from the Control and Automation department...
Compensated Flow
Originally posted by Ayyappan on 19 November, 2014 - 8:50 am
Possible errors in DP flow compensated flow (pr and temperature ) signals
New Replies:
Why are you measuring the pressure so far away? The pressure transmitter should be sharing a tap...
You have left all of the significant details out of your description. I am afraid that your...
Topic: PLCs and related questions.
from the Automation List department...
DOX5 and DOX10 for SattCon
Originally posted by Anonymous on 22 April, 2007 - 8:45 pm
DOX5 and DOX10 for SattCon
New Replies:
Your PLC has lost its program. Must be reprogrammed > was wondering if someone can help me...
Topic: Power generation equipment control.
from the power plant department...
CRV plate functioning in SRV & GCV
Originally posted by vasu on 7 August, 2011 - 6:04 am
CRV plate installed in EHC system.
New Replies:
Great article CSA, but the gorilla is even bigger when you use your lubricating oil as Load gearbox...
The 900-pound gorilla in the room (that's an English term for a very large--and visible--problem...
Topic: Power generation equipment control.
from the Power Generation department...
GT Control: Servo Operation
Originally posted by Neo on 17 November, 2014 - 10:09 am
Get a better understanding of GT control-servo operation
New Replies:
Following threads helped me a lot in understanding the operation of a servo valve. I'm sure it will...
Originally posted by Mr.Taho on 14 November, 2014 - 8:58 am
How to connect S7-300 (Master) to PLC BC3150 (Slave) Beckhoff via PROFIBUS?
New Replies:
I'm afraid I can't be much help. I don't think we use those modules anywhere....
Topic: Power generation equipment control.
from the INSTRUMENTATION department...
Problem with modbus getway
Originally posted by Not the real CSA on 9 July, 2014 - 5:32 pm
Communicating with Mark VI via HMI or getway
New Replies:
H A R, This SRV "problem" seems to be related to this (old) thread: ...
Topic: Power generation equipment control.
from the Engineering department...
SCR Heating Control
Originally posted by Condern1 on 13 November, 2014 - 6:11 pm
Help with a SCR heating circuit
New Replies:
The over current trip occurs always on starting or it is a random fault? Also can you give me the...
Topic: Power generation equipment control.
from the Forum department...
Changing SRV Valve setting
Originally posted by 8784597 on 16 October, 2014 - 4:28 pm
I need help to change the set point for SRV open position.
New Replies:
12542654/rwailikhalid, This is frustrating--I'm sure for the both of us. You are mixing two...
Topic: Power generation equipment control.
from the Operations department...
Generator Excitation
Posted by JoTang84 on 19 November, 2014 - 9:11 am
Generator excitation concept,functions and operator action during some disturbance.
Originally posted by Rushi Shroff on 18 November, 2014 - 1:40 pm
Electricity & Magnetism in Electromechanics
New Replies:
Those are the basic concepts presented in a one semester course. You will find them useful as a...
Topic: Application Questions and Problems
from the Petrochemical department...
Measuring Viscosity of Dense Liquid
Originally posted by Saad on 10 November, 2014 - 7:14 am
I have an application where I have to read real time viscosity of a thick, viscous and opaque liquid, whose viscosity changes with time.
New Replies:
Not all process viscometers are necessarily expensive. I would suggest here that you...

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