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Control.com member...Member Information and Posts by Roy_matson
from the Production department...controlling flow between two vessels
Control the level in a vessel while the other is transferring to the store tank, ensuring that only the desired is transferring while the other is being filled
Assuming you have a valve at each tank to select which one is delivering product put a position...
from the Steam Instrumentation department...Steam Flow Switch
Need a steam flow switch for MP Extration
Since the reason for injecting water is to cool the steam down, temperature would seem to be an...
from the Forum department...Remote Access Via Cell Network
How can I access a PLC network via cell?
I thought you guys would jump all over this one. I have since spoken with a cell modem supplier...
from the Instrument department...Pressure transmitter installation question
PIT installation question
Condensate pots are usually only used on condensing vapours like steam. There is no need for a pot...
from the automation department...measurement of water level
Sudden drop in level ?
It sounds as though the pressure transmitter you are measuring the level with is connected to the...
from the No Power Source At the Tank department...Wanted: Simple and Inexpensive Automated Pump Control System Solution
Looking for a simple and inexpensive pump control system to automatically fill water tank. No power source at the tank. Pump is 700 meters from tank.
Google is your friend http://www.remotecontroltech.com/applications/pumpcontrol.aspx...
It seems as though you are leaning towards a fully automatic system so you need either a pair of...
from the Instrumentation department...Level transmitter
Explain the Working principle for Displacer type and Float type level transmitters.
Nikhil, I'm not nit picking but we don't know for sure if the transmitter is in a...
Quick Answer Floats Float, Displacers Don't The float will follow the level so you should be...
from the I & E Department department...Understanding Absolute Pressure
Trying to figure out how to calibrate this absolute pressure transmitter.
There is no connection on the Low side because it's under vacuum, if you cracked that you would...
from the Enginnering department...Flow Transmitter calibration
Flow transmitter Recalibration on-line
You will need to tell us more about your meter before we could even take a guess....
from the Forum department...adjusting linearity
how to adjust the linearity error if provided
You didn't say linearity of what. For Bourdon tube pressure gauges and old style controllers...
from the 321123 this 1-3 input is bothering me! department...1-3vdc analog input to 4-20ma
I need to know how to convert a 1-3vdc input to a 4-20ma. input
Forgive me if I double post A 125 Ohm resistor in series with a diode will give 1.1 to 3.1 Volts...
from the instrumentation,process control department...Software to measure flow/velocity of overflow from weir
Software to measure flow/velocity overflow from a weir using a fixed camera
Why not just bite the bullet and buy one of the ultrasonic transmitters that are designed for just...
from the Forum department...RTD Cable Specs
RTD Cable Specs
That's kind of a no brainer, should I have said they should be the same size as well? You only...
Use the same spec you use for a single pair twisted cable for 4-20 mA only make it 3 conductor. ...
from the Department of Money Losing Jobs department...Bouncing Current Loop
1 mile long 4-20mA current loop bounces.
Brett, I think you might be on to something with the bouncing caused by current inrush when...
from the Instrumentation department...Rangeability of smart flow transmitter
Whether we can get better rangeability by using re-ranging feature of smart transmitter?
Furthermore since the DP from an orifice plate is a square root relationship at the bottom end the...
from the Forum department...Flow Rate Totaliser
Sorry I haven't used a Modicon in years, should use a double word I think if that's the format for...
I don't have access to your PLC but it's quite simple. Use a dummy value to start with to simulate...
Sure, it's easy. If once an hour you take the flow rate and add it to a register that's...
from the Forum department...DCS controller configuration
Distributed CPUs or only distributed I/Os
You should also look at the advantages of Foundation Fieldbus. That gives you the option of doing...
from the Control Systems department...Orifice Plates
Questions on orifice Plate
"1) We all know that Beta ratio range is from 0.2 to 0.7 . I want to know what has let to this...
from the Forum department...PLC 4-20mA pin circuit
What circuit does a typical PLC use for its 4-20mA current source output (internal to the PLC)?
There is no simple answer to that, Just make a source with OP amp. a transistor and a feedback...
from the Forum department...PT in high temperature
PT + SS tube installation in high temperature condition
You just need to isolate the transmitter from the heat with a few feet of tubing. How you place the...
from the Forum department...Level switch for furnance oil application
What type of level switch (high level) is most commonly used for furnace oil application in a tank of approx. 5M length and 4 M dia.?
Anon, Many of the Ultrasonic Gap switches (and I'm sure some tuning forks also) are 2 wire...
A displacer type switch might work well for you. e.g Magnetrol or Static "O"ring mounted...
from the Forum department...High temperature pH measurement
Finding probes to measure pH directly from 145c process flow
I think you are really pushing the limit. I have used probes above 100C but not that high. Perhaps...
from the Flow measurements department...V-cone flow meter for large pipes
Application of V-cone flow meters for flow measurements in large diameter pipes
Depending on the application another good flowmeter for large pipes is a propeller meter (like a...
For a 24" clean water application I would consider a pitot type flow element, e.g. annubar,...
from the Forum department...volt free contacts
can anyone explain what and how volt free contacts work?
Hi, I think "Volt Free Contacts" is just another way of saying "Dry Contacts"...
from the Instrumentation & Control department...Level Measurement in a power plant
Please suggest where exactly in a power plant are the following technologies used:
DP level measurement
Floats & Displacers
Conductivity type level
DP level measurement
Floats & Displacers
Conductivity type level
The most versatile level transmitter is the DP transmitter, it can be used in all the situations...
from the Forum department...Linear displacement sensor
I need help finding an adequate sensor
Everyone needs help sometime. The most accurate instrument I know is a Magnetorestrictive sensor...
from the Instru department...115VAC at 400 Hz
Why use AC @ 400Hz in aircraft?
I think you are correct the power to weight ratio is much higher at 400 Hz because the motor can be...
from the PSEB department...Problem being faced in measurement of level of a tank under vacuum
Using a DP type transmitter to measure level of liquid in a tank under vacuum pressure.
Singhbvirk, You said > 3. We have checked the wet leg and found the level to be OK. But when...
from the Forum department...Decoupling control loops
Decoupling control loops
I'm puzzled as to why you need the back-pressure controllers since they will have no effect on the...
from the control system department...Barriers & Isolators
What is use of barrier & isolator in automation system and where they should be used?
Barriers are used in Hazardous locations to power Intrinsic Safe instruments. The barrier will...
from the Automation List department...Help finding motor for actuator 12v
The motor is shot and I would like to find a replacement...
Another source of 12V actuators is a Linak www.linak-us.com www.linak.ca They make an...
from the C&I department...Difference Power Cables and Signal Cables
Please tell me the exact difference between Power Cables and Signal Cables used for Instrumentation Field Applications.
Vahid, If you are referring to the bare wire that accompanies each pair. Yes, that makes contact...
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The chicken that clucks the loudest is the one most likely to show up
at the steam fitters' picnic.