DP type flow transmitter on vacuum column
We have DP Type flow transmitter on pump discharge and this goes to a column under vacuum. Production says flow is not correct.
By d on 14 August, 2018 - 9:45 am
D/P transmitters work in such installations, but you need to elaborate. For example, 1. Type...
Flame Failure : Frame 6B Machine
Frame 6 B machines; Mark Vie . DLN-1 system , synchronized with grid. Partload operation Flame failure in Premix steady state .
foxboro I/A 6.3 message alarm configuration
DCS Systems for Balance of Plant
Looking for DCS solutions for balance of plant
Include or exclude derivative action in your PID settings?
By W.L. Mostia on 9 August, 2018 - 2:33 pm
I agree with David regarding the slowness of a temperature control loops can be due to the...
By d on 8 August, 2018 - 7:18 am
Derivative works fine in command and control servo systems, but with temperature controls, like...
By W.L. Mostia on 7 August, 2018 - 1:37 pm
Derivative is commonly used in slow loops like many temperature loops. Derivative action is...
How to resolve the SATURATION Problem on Rosemount Transmitters
Ge 9fa Unit During Running Got Tripped Due To Mark Vi Chanel R And T Failure
Ge 9fa Unit During Running Got Tripped Due To Mark Vi Chanel R And T Failure (2 out of 3)
Converting from %Weight to g/L
Existing devices measures concentrations in solution in %Wt units. I have question regarding converting it to g/L units.
By d on 1 August, 2018 - 9:51 am
I started with one liter of pure H2O then added the specified weight of NaOH. Since you are...
By d on 26 July, 2018 - 8:13 am
one liter H2O = 999g / 20 DegC 8% Wt-> 80 grams per liter of water 12% Wt -> 120 grams...
Trying To Find a 4 Wire Pressure Transducer
Posted by Rob Armstrong on 7 July, 2018 - 10:07 pm
Desperately trying to find a replacement pressure transducer!
By Rob Armstrong on 9 July, 2018 - 9:49 pm
THANK YOU Everyone for so much great information!!!!! I have some good photos of the sensor,...
By d on 8 July, 2018 - 5:21 pm
Rob, I stand corrected on using a pressure switch with a screw compressor. It would defeat...
By d on 8 July, 2018 - 11:29 am
Get a pressure guage, and add an adjustable pressure switch if you need a pressure cutoff for...
By Rob Armstrong on 8 July, 2018 - 9:07 am
I have a wiring diagram for the existing sensor I can email to anyone if they can help......I...
By Rob Armstrong on 8 July, 2018 - 8:23 am
Thank you for the reply. Unfortunately there are no numbers or labels left on the original...
Process Safety Time and Set pressure
Verify set pressure based on Process Safety Time
Piping & Instrumentation Diagram (P&ID) Analysis Tool
Developing an online tool for extracting information from PIDs
By d on 24 July, 2018 - 4:45 pm
gee, there may be an ISA "standard" but that is not the final answer as every company has...
on 20 July, 2018 - 1:31 pm
I would estimate there would be a market for it, and many sites would find it useful. However, I...
Thermocouple and VFD fan control
Need help on thermocouple wiring.
Fuel Consumption Issue for Gas Turbine 9fa
Posted by Mohamed nawar on 21 July, 2018 - 9:13 am
Why is fuel consumption at low loads is higher than base load on gas turbine frame 9fa?
on 23 July, 2018 - 4:56 pm
Mohamed nawar, Every GE-design heavy duty gas turbine control system I ever worked on came with...
Experion Modbus TCP/IP Scaling
Looking for a way to scale Modbus holding/input registers using the PCDI numeric array blocks.
Getting a better understanding of gas turbine control
How to get a better understanding of gas turbine control?
Pressure transmitters vs flow meters
By d on 21 July, 2018 - 1:37 pm
Static pressure is a scalar variable, traceable to independent calibration standards. Flow...
Bench Set, Positioners and Seating Force
Posted by GustavoArg on 1 July, 2018 - 2:02 am
Should I care about the bench set of an actuator if using a valve positioner?
By GustavoArg on 14 July, 2018 - 4:45 pm
Thanks for your reply Roy, I've found practically that for a 100% signal in an Air To Close...
How Does The Output Of The Pid Controller Remain Non-Zero?
How does the output of the PID controller remain non-zero after the error becomes zero?
By d on 17 July, 2018 - 4:30 am
Error is based in the difference of a measured variable and a desired setpoint. The controller...
By Mustafiz on 16 July, 2018 - 6:32 pm
In PID control, the integrator is the reason holding the last accumulated value. integrator is to...