Heat Exchanger Not Working Properly
In heat exchanger the Control Valve in the steam inlet line keeps hunting now and then.What could be the reason?
Slurry Density Measurement
Are there reliable alternatives available to measuring slurry density except for the Gamma radiation method?
By Tim Lee on 14 April, 2018 - 11:08 am
I didn't read all the way through the blog, but the indications I got is a Coriolis meter would not...
Pneumatic Instrumentation Systems
Will the pneumatic instruments be obsolete in the near future?
By Bob Peterson on 13 April, 2018 - 11:43 am
I don't know that I would rip them out indiscriminately, but over time I would be replacing them...
By Rora on 13 April, 2018 - 1:48 am
Many pneumatic systems are being replaced by servo motors, but pneumatic is still necessary for...
Formula for Square root extraction for doing in PLC for flow measurement.
By valsadas on 14 April, 2018 - 5:28 am
Hello, This reply was very helpful.I have one more question. Is it possible to find out that how...
Best method for this scenario
By Ashton on 12 April, 2018 - 10:17 pm
Ethernet cards are no longer available for the 90-30 series PLC. I plan on using the existing...
Air-Cooling Unit Outlet Temperature Control
Distillation column has air-cooling unit outlet temperature control problem.
By Hans H. Eder on 12 April, 2018 - 6:50 am
Lowering the PID execution frequency is not going to help. The better approach: First try to get...
We have DP orifice 0~500 mbar. We also have P&T compensation and display value in MMSCFD
By Ikhtiander - on 11 April, 2018 - 12:00 pm
Hi Ayyappan, to calculate gas volume flow or mass flow based on differential pressure, you can...
Triconex DI-3503E Modules Channels Changing Frequently from TRUE to FALSE State
DI-3503E modules channels are changing frequently from TRUE state to FALSE state.
Need advice about using 4C or 2Pair cable for MOV instrument that has 2DI and 2DO command to the PCP panel.
Modbus for PID Loop Process Variable
Possible downsides of bringing process variable (flow rate) into a pid loop via Modbus rather than direct connection.
Single Core Drop During Gas Valve Manual Movement
While attempting to manually move gas valves on a Mark V controlled 7EA Combustion Turbine a single core drops out registering a speed increased more than 5%. Problem happens intermittently, cause unknown.
on 2 April, 2018 - 6:22 pm
JMarkV, I believe every AutoCalibrate display shows TNH towards the bottom of the display. What...
Accident Shutdown of Hydro Generator
Accident shutdown of two hydro generator working without load (less that 200 kW) while energizing a power transformer of 12.5 MVA, 110kV/30kV. Can someone explain this phenomenon?
Can anyone explain what is meant by Transmitter burnout and Burnout direction setting?
By Rora on 8 April, 2018 - 4:17 am
Burnout direction refers to how a transmitter indicates that there is a problem over an analog...
By Swarna Balaji on 3 April, 2018 - 3:31 am
If any transmitter fails, it is necessary to protect the process. During ordering of the...
What are the Key differences between P &ID diagrams and Loop Diagrams?
By Rora on 8 April, 2018 - 4:04 am
P&ID shows elements relevant to the process flow... sensors/transmitters, valves, tanks,...
Level Sensor in Sanitary Slurry Tank with Diaphragm Pump
Posted by supervisedautomation on 6 December, 2017 - 1:39 pm
I'm looking for a sensor system to indicate how much water has been added to tank and also to indicate when the tank has been pumped empty.
By Hilton on 7 April, 2018 - 4:47 pm
Since you are only monitoring two conditions you should consider using level switches, one for full...
Problem with Siemens Fieldbus positioners
Connection Failure with Fieldbus Siemens positioners
By Kazemi on 4 April, 2018 - 6:25 am
DEAR MR. Hasseli, We are faced with the same problem here with Siemens positioners as the...
Polarity of HART 275 Communicator Charger
Polarity of charger for HART 275 Communicator
MarkV Timers and Counters Inaccurate
Mark V timers and counters inaccurate counting after switching off and ON of <R>, <S> and <T>
By sms on 24 March, 2018 - 6:54 am
> However, can you tell if the accumulators are incrementing > properly now--even if the...
By sms on 20 March, 2018 - 6:37 am
It is DONE!!!! Downloaded TOTT_Q.DAT copied from other working totalizer unit, switched OFF all...
Gefran 800 Controller Error
Gefran 800 Controller does not display the installed temperature and is not connected to the temperature tunnel
Where in EPKS does the Alarm and Events gets saved.
Project on Sugar Industry Modeling
Graduation project about DCS application on sugar industry mainly extraction plant for beet sugar
Is your plant controlled by Russia? Are you sure?
The US Dept of Homeland Security just issued a report that there has been an ongoing, successful cyberattack on US utility plants from Russia.
By Curt Wuollet on 18 March, 2018 - 5:30 pm
We certainly hope not, but I hope people listen to the canary. Let's look at our security...
By Rora on 18 March, 2018 - 11:25 am
The suggestion that a plant could be remotely operated in an ongoing basis without detection is...
Communication Between PLC and DCS
Student of Instrumentation eng. with final year project has a process loop control using DCS and PLC in master slave configuration.
Hagan Controls Corporation Pittsburgh PA
Posted by george moore on 10 May, 2017 - 3:44 pm
Looking for a parts distributor for a Hagen Control valve on a Fuel Oil system
By Dan Swartz on 16 March, 2018 - 9:22 pm
Hagan was purchased by Rosemount which is owned by Emerson. Parts if available would be ordered...