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24VDC Floating power supply fuse protection.
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By roy Matson on 12 April, 2013 - 7:21 am -
I have seen power supplies ungrounded with a pair of lamps
Positive - lamp - ground - lamp -...
By sakram on 10 April, 2013 - 6:02 am -
Dear Russ,
Thanks for your reply.
We are extending (+) to field limit switches and connecting...
By Russ Kinner on 8 April, 2013 - 6:13 pm -
I use branch CBs to isolate the 24 VDC from its load but that is not "protecting" much of...
By Steve Myres on 6 April, 2013 - 8:13 pm -
It's bad practice to run your 24VDC ungrounded. I've seen it cause not only inexplicable bizarre...
Temperature compensation for density variation of air in hydrostatic measurement
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By Roy Matson on 10 April, 2013 - 12:47 am -
Why are you so against adding some air to maintain the level?
To keep it simple use a simple...
FYI, a year ago, maybe two years ago, a forum topic involved diminishing air pressure in a closed...
I'm trying to find a way to go to work on an Oil plant.
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Thank you for your feedback Dan it helps for sure, especially the connection between assembler with...
By Dan Ingold on 6 April, 2013 - 11:25 am -
Hi Rafluska,
Your background in AI and high-level languages (HLL) doesn't handicap you. If...
Standby card leds 1 and 2 has been switching on AVR Prismic
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By Sebastian Rebord on 5 April, 2013 - 1:27 pm -
When the AVR is operating in main and the balance with the standby is OK, LED1 and LED2 have to...
Looking for a transfer function for a solenoid valve which regulates the quantity of steam that is provided to a heat exchange coil
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Sebastian is right... i should have double checked my logic and math before i submitted that one......
By Sebastian Rebord on 5 April, 2013 - 11:32 am -
Declan,
As NIC said the easiest way is consider the transfer function as a first order delay...
Declan,
The easiest way is to assume that the model just involves a simple time constant....
The Valve I am looking at is a proportional valve (control valve) where the output flow is...
Thanks for the reply, I will obtain more information on what type of valve I am looking at and will...
By Steve Myres on 26 March, 2013 - 11:36 am -
Well, usually the transfer function for a solenoid valve is:
On: 0%
Off: 100% ;)
A...
I need some help with selection of air velocity and temperature sensors & actuators that will work on hard environmental conditions inside the air-duct.
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By Bhavesh on 5 April, 2013 - 9:09 am -
Hi,
For temperature sensor, it should be kept in mind that high air speed and that too with sand...
Pilot Operated Valve
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Pneumatically Operated Deluge Valve:
Simulate the Low Pressure in the Fusible Line by draining...
By RM on 27 March, 2013 - 12:08 am -
anyone?...
vibration in GE Frame 6 after major overhaul
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Ridha,
Thanks for the feedback! I'm currently on a re-start of a GE-design heavy duty gas...
By Ridha on 29 March, 2013 - 10:03 am -
Dear CSA,
As you previously predict the cause of the vibration was a misalignment.
Lot of...
By Iman on 22 March, 2013 - 2:22 pm -
Hmmmm..before the outage/shutdown, was this a controlled shut down?
How much run time has been...
By Ridha on 22 March, 2013 - 9:32 am -
Dear CSA,
Thank you for the attention you give to this subject.
From my side I Strongly...
Ridha,
> -The problem is that the vibrations were also measured using an external
>...
What are the ways available to integrated Siemens S7417 controller with PCS 7 system to Honeywell EPKS system with C300 controllers.
Looking for calibration training beyond the basics.
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By Curt Wuollet on 27 March, 2013 - 6:50 pm -
That would probably be a Metrology course Beyond the basics, every device is different.
Regards
...
who can help us? we need the LEA instruction manual for alstom p320.
Extreme vibration and loss of signal on level transmitters
Intouch user of many years has had enough and needs to find a suitable replacement
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By Christopher LaFavers on 26 March, 2013 - 10:17 pm -
I've found ClearSCADA to be a great product. Licensing has a great price structure for my smaller...
As per my knowledge for ESD system is always implemented through PLC is there any particular safety reasons for that?
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By Venkat on 26 March, 2013 - 3:48 am -
ESD system should be separate and integrated with your DCS system. ESD system can be hardwired sil...
Mark VI not working with a VCMI board replacement!!
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By sdbarman on 25 March, 2013 - 3:18 am -
Dear Fausto
You may use the following procedure
Replacing a VCMI
To replace and reload the...
This is a survey aimed specifically at automation/control engineers in relation to security for industrial control networks
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I would like to get a copy of the results. I wanted to reiterate Walt's point that your questions...
have to measure boiler drum level of 500 mm
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Dear,
I am measuring the drum level 0-920mmWC. My transmitter range set is +620 to -320. So, the...
What is cascade control & explain two element in simple language?
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By RISHI THANKS NEED MORE HELP on 22 March, 2013 - 4:37 am -
Dear
Thanks for imdt reply. we belongs to filed of plc programing & basic faculty is...
In case of drum level control
a. Single element control - Drum Level as input'
b. Two element...
Looking for color standards for control wiring.
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By Kitchener on 21 March, 2013 - 5:47 pm -
Did you ever get an answer? This is the standard I inspect for, if the client(AHJ)does not have...
In Yokogawa CS3000, if DCS engineering station 164 and its partner fails, is it possible to restart another stations?
Bearing Temperatures hunting
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There may be various reasons. Some of them are listed below
1. Improper grounding of system: The...
Can you recommend a book about instrumentation and process control in a petrochemical plant and oil and gas
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By W.L. Mostia on 20 March, 2013 - 3:09 pm -
As a book author I fully agree with Walt regarding the pirating of copyrighted material. It takes...
By Gerald Beaudoin on 20 March, 2013 - 8:19 am -
Right on Walt....I know that not everyone shares this point of view. but as a consumer of any...
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