Drum level control by two element
What is cascade control & explain two element in simple language?
By Shajan on 26 March, 2015 - 4:56 am
How can you implement 3 element drum controller using PLC PID logic? I have a project that needs...
Pressure Transmitter for Nuclear Station
Looking for recommendations for pressure transmitters for a nuclear station.
Organizing SIF Testing to be efficient and effective
Having trouble finding a transfer function for the flow of a pump so that I can tune the PID controller.
Migrating Experion/C300 On-Process with Non-Redundant IOMs
Keeping the process online, whilst performing offline migration to IOMs
Type K Thermocouple Failure
Many thermocouples failing. Looking for causes and solution.
By d on 23 March, 2015 - 6:50 am
Misc comments Type K sensors with Type J extension wires, you do need to be cautious about that....
By d on 22 March, 2015 - 9:51 am
Type K's do experience higher failure rates at those temperatures. You can use larger wire...
Analog Input of Heater Fluctuating
The analog input of the heater is fluctuating with +/- 1000. What could be causing the problem?
Density and Flow Measurement
Not advertising China reliable Coriolis Mass Flow Meters and Direct Insertion Density Meter
Migration from CS3000 TO CENTUM VP
Annoyed for having to think of migrating to Centum VP just because Dell has stopped manufacturing XP compatible Workstations.
Remote Set Point Temperature Controller
Looking for recommendations for a remote set point PID controller
Pump ON/OFF Control P&ID symbols
I'm looking for the information on the correct way to show pump control on a P&ID.
By Roy Matson on 11 March, 2015 - 5:45 pm
Revision, Another way around the problem is have a separate tag for the pump, often given the...
By Roy Matson on 11 March, 2015 - 5:38 pm
We often use xxHHH in the petrochemical industry where we have regular DCS trips and Emergency...
Proper Cable for 4 - 20 mA Analog Signal
Can we use twisted pair, stranded bare copper cable for 4-20mA analog signal?
By Roy Matson on 11 March, 2015 - 5:13 pm
Bare copper cable would short out :-) >For 4-20mA analog signal can we use twisted pair,...
By robostan on 11 March, 2015 - 9:25 am
> For the Analog signal 4-20ma dc transmission normally used cables are 2X1.5smm cu twisted...
By rvsaradhi on 11 March, 2015 - 3:36 am
Hi, For the Analog signal 4-20ma dc transmission normally used cables are 2X1.5smm cu...
By Curt Wuollet on 11 March, 2015 - 12:31 am
Yes, the cable sold for RS485 wiring works well and is relatively inexpensive. Regards cww...
By robostan on 10 March, 2015 - 9:37 am
Don't know of any problem with using stranded copper cable used on 4-20 maA analog signal. The...
24VDC Grounded or Floating
24VDC floating or grounded for Digital Input module.
By Roy Matson on 10 March, 2015 - 5:57 pm
I prefer to ground the negative otherwise you may get an accidental ground on positive which would...
Transmitters Calibration Interval
What is the recommended interval for calibration of transmitters, DP, temperature, and pressure transmitters.
By Vahid on 6 March, 2015 - 2:53 pm
I recommend you to specify an interval for example 3 months based on the refereed API 21.1. do and...
By rsaradhi on 1 March, 2015 - 2:06 am
Hi, 11.3.2 The accuracy of all electronic liquid measurement (ELM) equipment should be verified...
By rsaradhi on 1 March, 2015 - 1:45 am
Hi, > Is that calibration interval recommendation in the 2013 version/edition? Please note...
APS 5000/TDC 3000 History Module Replacement
History module bad sector encountered on Yamatake APS5000/TDC3000 DCS and needs replacement.
GE 9FA Gas Turbine - Fuel Changeover Load
GE 9FA Gas Turbine Changeover Load
Level Control for Water Tank
What kind of level sensors to be used to control the water level in a tank provided there will be level sensors to monitor 3 specific points in the tank.
Antisurge Algorithm for Centrifugal Compressor
Antisurge control for centrifugal compressor with variable speed: Algorithm implementation in Unit Control Panel
VTScada 11 hmi software? Any thoughts
Looking for feedback on anyone who has integrated systems using this software.
By Gettingitrightthefirsttime on 27 February, 2015 - 3:39 pm
I've been using various HMI software products for over 20 years, including VTScada, RSView, WinCC,...
Measure the oil level in a tank over a range of temperatures
By Roy Matson on 26 February, 2015 - 4:41 pm
Ron, I agree the pressure will remain constant regardless of temperature. However it will...
Convert Flow Rate from kg/hr to litr/hr
How do I can convert flow rate from kg/hr to litr/hr?
By Roy Matson on 26 February, 2015 - 5:21 pm
You have realized that compressible fluids are far different from non-compressible liquids. Really...
Can't install software without floppy drive.
By shoaib on 24 February, 2015 - 9:13 pm
Dear expert how i can generate a key code floppy disk files from an existing HIS? My key code...
OPC Tunneling Inter vendors
Is it possible to communicate MatrikonOPC Tunneler with Kepware OPC Connectivity Suite?
Looking for Information about OPC Servers
When do we need to use OPC SERVER?
Separate Instrument Earth Pit
Separate Instrument Earth pit not available