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Control.com topic...
Process Control
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: 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: 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...
No problem: The general goal is to catch an intermittent problem in as few iterations as...
Condern1... some Xfmr-related questions: 1) Is Primary-winding (480Vac, Controller-side)...
curt, I am wondering if you could give me greater details on how you would troubleshoot this? ...
I appreciate your input about the transformer as this is where I think the problem is also, but...
No problem! But, do watch the voltage rating on the probes and think carefully about your...
I appreciate the information Curt and I feel this is the way to go. ...
I think you should examine the heaters to see if a sag might be happening if the load doesn't move...
Check the manufacturers voltage spec, then measure what is actually delivered to your unit. For...
Could be a problem with the transformer that feeds the load. Some heather units have parameters to...
The problem did not follow the hardware means. When I put a unit from another system into the one I...
"the problem did not follow the hardware" please explain what you mean, basically did...
Topic: Continuous process industries, DCS questions.
from the Underwater department...
Density and Viscosity
Originally posted by Kevin on 20 January, 2011 - 10:58 am
Measuring Density And Viscosity
New Replies:
Just ultrasonic or are other technologies considered? There are now several; vibrating sensors...
Dear Kevin, We are interested in this instrument as it meets our requirements in the textile...
Topic: Continuous process industries, DCS questions.
from the Engineering department...
Separate Earth for Intrinsically Safe Instruments
Originally posted by Hamid Sarukhani on 16 August, 2008 - 12:23 am
Is a Separate Earth for Intrinsically Safe Instruments required?
New Replies:
Not to my knowledge - but there is no reason why you can't adopt one for your own site standards if...
Hi Bruce, Is there any separate electrical symbol for Intrinsically Safety Earth? Because PE and...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Blockage in Impulse Lines/ Filling Glycol
Originally posted by Nasser on 30 October, 2014 - 3:23 am
What is the best practice when you have blockage in impulse lines for flow transmitter how can clear the blockage?
what is the best equipment to fill glycol in level dp cell in both H & L sides?
New Replies:
Can you give me the best company that provide bucket pump to clear impulse lines?...
Topic: Sensor technologies.
from the Instrumentation department...
Calibrating a FMT500-IG Flow Meter
Originally posted by Laplace1050 on 15 November, 2014 - 4:19 am
Looking for documentation about calibration an ABB FMT500-IG flow meter.
New Replies:
Check out the very first link: http://www.lmgtfy.com/?q=FMT500-IG...
Topic: Engineering and workplace issues.
from the Please Don't Make Me Wear The Helmet department...
Moving Estop Wiring
Originally posted by Nate B on 13 November, 2014 - 10:00 am
Can I fire an Estop remotely?
New Replies:
Depending on the process/risk, it may even be prudent to have it certified by an qualified third...
Just what does your e-stop control? Most e-stops are contacts in series with other conditions,...
Yes it is possible. Go through previous threads for similar discussions....
"This triggers a severe headache for troubleshooting due to the company's arc flash policy...
I don't think your approach violates any code in the United Sates, but adding the 120 VAC relay is...
Topic: Information resources, documentation.
from the Forum department...
Instrument Learning Materials?
Originally posted by Dave on 30 October, 2014 - 7:54 am
New instrument engineer, could use some help!
New Replies:
http://www.automationfederation.org/Content/NavigationMenu/General_Inf ormation/Alliances_and_Associa...
Hey there Dave, This blog is filled with useful information for engineers and process control...
Topic: Continuous process industries, DCS questions.
from the Automation List department...
Comparing PLC/SCADA to LabView?
Originally posted by Chip Hinde on 27 November, 2001 - 2:24 pm
Repost due to bad timing of the weekend... Is it still possible to define when one is better than the other?
New Replies:
LabView to me is a complex and highly advanced approach to controls when compared to PLC's. ...
If you program LabVIEW with a lot of global variable, I don't think you have adopted their...
Topic: Continuous process industries, DCS questions.
from the Forum department...
NRV Downstream of Control Valve
Originally posted by servo2014 on 7 November, 2014 - 2:41 pm
Purpose of NRV/check valve downstream of Control Valves
New Replies:
Usually done by process engineers who don't know what the are doing. Seriously check valves are...
Topic: Continuous process industries, DCS questions.
from the Forum department...
VFD Pump Efficiency Logic
Originally posted by eng101 on 5 November, 2014 - 11:00 am
Programming pump curves in PLC/DCS for efficient operation.
New Replies:
Please explain in detail, the process using multiple pumps. do you have variable loads?...
There are problems in your plan. First, most pumps are designed to operate at either one of two...
Topic: Continuous process industries, DCS questions.
from the Open Ended Question department...
P&IDs and Process Control Narratives
Originally posted by Roger Rehbein on 5 November, 2014 - 3:30 pm
How are process control ideas shared between different parties within your organization especilly when all parties are not control engineers?
New Replies:
The Implementation of SAMA diagrams helps one to identify the scenario in which one type of control...
I have used the following as a summary of the information required in a control system narrative or...
Well the modern approach is that taken by Virginal Galactic and leave it up to the programmer.... ...
Originally posted by OZI Guy on 30 October, 2014 - 5:37 pm
Is there a published work about expected maximum uncertainty if the recommended straight run for an orifice plate flow measurement is not observed?
New Replies:
The ASME flow meter handbook (1971, 6th ed) has such charts, they haven't changed much. You'll need...
Thanks d, Is there a simple (rule of thumb sort of thing) to address this case? I understand...
Topic: Sensor technologies.
from the Forum department...
Flow Measurement Using Load Cells
Originally posted by Juan Pardo on 24 October, 2014 - 5:20 pm
Measuring the flow coming out of a vessel using only a load cell to control a valve.
New Replies:
I used that method with good results on a small pilot autoclave. The slurry flow was too low to...
I agree with "d". This is not the way to go. Rather install a clamp on ultra-sonic flow...
Topic: Communications systems and equipment.
from the HELP on a communication error...51478?? department...
IDEC Communication Error 51478
Posted by Linda Hood on 3 November, 2014 - 4:34 pm
Son is on a location and is receiving an IDEC communication error 51478. he is where any communication is EXTREMELY limited due to the remoteness.
Topic: Continuous process industries, DCS questions.
from the DIY DCS department...
Distributed Control Systems
Originally posted by Elias Edv on 31 October, 2014 - 8:14 pm
For a school assignment I want to buy and configure a DCS.
New Replies:
Better. DCS isn't Just a micro controller. I used to be an Embedded systems design engineer before...
Hello.... I've been doing this for many years. Since my eyes where at my knees. What I find...
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