Posts from...Today, Sunday, November 23, 2014
from the Maintenance department...Supplying Generator Rotor Using Carbon Brushes
why we give supply generator rotor DC directly through carbon brushes instead of exciter?
By 309eguy on 23 November, 2014 - 2:28 am -
I agree 100% I was trying to say the same thing. Must be my English. > It's virtually...
309Eguy, It's virtually impossible the measure the output of the rotating diode wheel of a...
By 309eGuy on 21 November, 2014 - 8:50 pm -
An advantage of a brushless exciter is better control of the generator under fault/transients...
Saudaslam, you're very welcome....
from the Forum department...Gas Turbine Startup Problem
IGV not opening during startup of Gas Turbine
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...
from the Tap-Changing like Tap Dancing, i.e., department...Physics of ... Tap-Changer
The question is asked often, but never a viable answer!
Correction: ∠θrš of Exercise 2 should be 0.00...
from the Forum department...Measuring Flow in Small Gravity Sewer Lines
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
By Roy Matson on 22 November, 2014 - 9:03 am -
I would think Siemens Milltronics Ultrasonic transmitter. The municipality I live in uses these...
from the INSTRUMENTATION department...Foundation Fieldbus Instrument Simulation
how we can simulate any ff transmitter with a field communicator (0 - 100%) without injecting process variable?
By Roy Matson on 22 November, 2014 - 8:48 am -
> Usually devices have a hardware protection jumper that you need to set > to enable...
By Jonas Berge on 21 November, 2014 - 11:39 am -
There is a book published by ISA: ...
from the Technical department...Exhaust Temperature spread
Allowable spread calculation
By GT mark-VI on 21 November, 2014 - 5:47 pm -
where is my mistake? please explain. > you are using different temperature scales, maybe...
from the Forum department...Making an HMI with borland delphi
how to make a HMI using borland delphi 7
> Delphi has been used in some interesting engineering stuff! There has been...
from the Instrumentation department...Calibration
Doubts regarding the calibration and operation of smart type transmitters
By Jonas Berge on 21 November, 2014 - 11:41 am -
These three aspects of smart transmitter calibration are explained in the tutorial found here: ...
from the Communications department...How do OPC works?
How do OPC works and what are the differences with other protocols?
By Jonas Berge on 21 November, 2014 - 11:32 am -
Learn about OPC and other software technologies used in automation from the "Software for...
from the instrumentation department...transmitter calibration
General procedure for sensor trim of transmitter
By Jonas Berge on 21 November, 2014 - 11:28 am -
I agree with Geir You get the best accuracy if you do sensor trim at LRV and URV Learn more...
from the Forum department...Mark-V TMR Redundancy Failure - Trips when 1 Computer Reboots
Mark V speedtronic for GTG control trips when "R" computer automatically reboots.
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...
from the Forum department...Foundation Fieldbus - Linearization Type
Foundation Fieldbus Linearization Type
By Jonas Berge on 21 November, 2014 - 11:18 am -
When you use "direct" the ranges/scales (XD_SCALE and OUT_SCALE) aren't even used. ...
from the Forum department...EDDL files stored in/on device?
Why haven't manufacturers figured out a way to store EDDL files in on-board memory of devices?
By Jonas Berge on 21 November, 2014 - 11:15 am -
Not available yet. FOUNDATION fieldbus does support the capability to store the DD (EDDL) file in...
from the Forum department...Gas Turbine Low CPD
GT CPD dropped by 0.5 bars and 10MW.
RY, Yes, I did miss the word booster; my bad. But I still fail to understand how heating of the...
By RY on 20 November, 2014 - 10:46 pm -
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...
from the Eng department...Recalibrate RTD Temperature Transmitter
change calibrated range RTD temp transmitter
By Jonas Berge on 21 November, 2014 - 11:07 am -
See the smart transmitter tutorial found here: ...
from the Forum department...Interfacing of a Transmitter directly to a PC
To be able to display a process value directly in a PC without using PC based SCADA system
By Jonas Berge on 21 November, 2014 - 11:01 am -
Consider devices using the FOUNDATION fieldbus protocol: ...
from the Instrumentation and Control department...Calculating Pressure Transmitter Range
How can we test Rangeability of Pressure Transmitter?
By Jonas Berge on 21 November, 2014 - 10:55 am -
Terms like turndown and rangeability are explained in the smart transmitter calibration tutorial...
from the Automation List department...Control Valve Cycle Measurement
How to measure the control valve cycles?
By Jonas Berge on 21 November, 2014 - 10:53 am -
I think it goes by reversals; change in direction. Learn more about device and valve diagnostics in...
from the Automation List department...PLC5 Ethernet Going to Sleep
Legacy Allen-Bradley PLC5 has intermittent communication issues.
from the Control and Automation department...Compensated Flow
Possible errors in DP flow compensated flow (pr and temperature ) signals
By Roy Matson on 20 November, 2014 - 9:49 pm -
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...
from the Automation List department...DOX5 and DOX10 for SattCon
DOX5 and DOX10 for SattCon
By Avramov on 20 November, 2014 - 8:49 am -
Your PLC has lost its program. Must be reprogrammed > was wondering if someone can help me...
from the power plant department...CRV plate functioning in SRV & GCV
CRV plate installed in EHC system.
By Bob Johnston on 19 November, 2014 - 9:37 pm -
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...
from the Power Generation department...GT Control: Servo Operation
Get a better understanding of GT control-servo operation
Following threads helped me a lot in understanding the operation of a servo valve. I'm sure it will...
from the Forum department...Connecting S7-300 and BC3150/BK3150 (Beckhoff) via PROFIBUS
How to connect S7-300 (Master) to PLC BC3150 (Slave) Beckhoff via PROFIBUS?
By Joe E. on 19 November, 2014 - 3:58 pm -
I'm afraid I can't be much help. I don't think we use those modules anywhere....
from the INSTRUMENTATION department...Problem with modbus getway
Communicating with Mark VI via HMI or getway
H A R, This SRV "problem" seems to be related to this (old) thread: ...
from the Engineering department...SCR Heating Control
Help with a SCR heating circuit
By John Correa T. on 19 November, 2014 - 1:31 pm -
The over current trip occurs always on starting or it is a random fault? Also can you give me the...
from the Forum department...Changing SRV Valve setting
I need help to change the set point for SRV open position.
12542654/rwailikhalid, This is frustrating--I'm sure for the both of us. You are mixing two...
from the Operations department...Generator Excitation
Generator excitation concept,functions and operator action during some disturbance.
from the Forum department...Role of 'Electricity & Magnetism' in Principles of Electromechanical Actuator Systems
Electricity & Magnetism in Electromechanics
Those are the basic concepts presented in a one semester course. You will find them useful as a...
from the Petrochemical department...Measuring Viscosity of Dense Liquid
I have an application where I have to read real time viscosity of a thick, viscous and opaque liquid, whose viscosity changes with time.
Not all process viscometers are necessarily expensive. I would suggest here that you...
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