Transmitter Explained | Types of Transmitters
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- Опубликовано: 2 авг 2024
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In this video, we’re going to introduce you to a very important device used in process control today - the Transmitter.
In the Telecommunications world, a Transmitter is a device that produces radio waves radiating from an antenna.
In the world of process control, a Transmitter is a device that converts the signal produced by a sensor into a standard instrumentation signal representing a process variable being measured and controlled.
In the early days of process control, the standard instrumentation signal was pneumatic while today it is more likely to be an electrical signal.
The standard pneumatic signal is 3 to 15 psi. The standard electrical signals are 1 to 5 volts or 4 to 20 mA.
As mentioned earlier, the electrical transmitter output signal is usually a range of voltage (1 to 5V) or current (4 to 20 mA).
In process control, it is understood and goes without saying that the transmitter output range represents the 0 to 100% of the sensed physical variable.
For example, the transmitter would produce an output current range of 4 to 20 mA for a measured temperature range of 0 to 150 degrees Fahrenheit (0 to 100%).
The four major process variables measured and represented by a transmitter are Pressure, Level, Temperature, and Flow.
Transmitters are also used in industry to measure other variables such as Position and Speed and chemical properties such as pH and Conductivity.
A Transmitter requires a power supply to operate.
A 4-wire transmitter has 2 wires connected to a power supply and 2 signal wires connected to the PLC. The power supply can be AC or DC depending on the vendor and model.
A 2-wire transmitter has only 2 wires. These 2 wires provide power for the transmitter and are also the signal lines!
New technologies have spawned the development of Smart Transmitters.
Smart Transmitters not only produce the 4 to 20 mA process variable signal, but also transmit and receive digital information such as Instrument Tag Names, Calibration Data, and Sensor Diagnostics. Protocols such as HART are commonly used on Smart Transmitters.
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You might want to review 2 of our other articles:
1) DP Level Measurement Explained
realpars.com/dp-level-measure...
2) What are 2-Wire and 4-Wire Transmitter Output Loops?
realpars.com/transmitter-wiring
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Missed our most recent videos? Watch them here:
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realpars.com/allen-bradley-plc/
realpars.com/pressure-transmi...
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#Transmitter #Sensor #RealPars
I am a seasoned controls guy (25 years experience). This video is one of the most succinct and accurate explanations I have ever came across. Bravo!
Hi Thomas,
Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us.
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Kindly discuss about drum level control transmitter in boiler
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@@realpars Hi ! I need a video on position transmitter. I didn't get that in the video section. Can you make a nice video like this based on "Position Transmitter"??? I am waiting for that.
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Great video. I am from electrical background but need to learn instrumentation. Can you make videos in detail on sensors and how DCS controls each control valves
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Is there a video explains valve size calculations and characteristics?
Thank you for your question! No, Realpars doesn't currently have a video that covers control valve selection and sizing. Most control valve manufacturers (Emerson, Valtek, Masoneilan, FlowServe, etc.) have videos and whitepapers on the sizing of control valves.
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That's great to hear! Keep up the learning curve!
I think 4-20ma is a standard for the instrumentation inputs and outputs.
thaaaaank
A DP transmitter mount that is connected directly to the process by tubings but mounted some distance away is called remote or traditional mount? In this case there is no other diaphragm on the line connected.
Thank you for Information
#electricalada
Good
Thank you!
Do pneumatic transmitter and pneumatic pid controllers.
Please make a video about microcontrollers
Thanks for sharing your suggestion with us! I have sent this over to our course developers.
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Hello
Do you have an online Courses ?
I'm instrument technician and I need more skills in this field
Yes they provide a online course . You only need to download their app and then you can start your course .
@@anindyasinha8930 Do they have couurses on DCS ?
Are they going deep in topics or just they give basic information ?
@@snoopdogksa904 I only know they have a course , but don't know the details of it . For the details you only need to download realpar app .
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@@realpars
Hello thank you for your Concerning
I have couple of questions
How much hours do realpars offers in DCS topics and are there any teachers can answer students questions I'm not concerned about a degree i search for knowledge
I work as instrument technician so I already have some knowledge in this specialty but I want to go deeper
Siemens equipment has a voltage signal standard = 0 ... 10 V.
The 4 ... 20 mA current standard is used mainly for sensors (signal reception).
For control, a current signal of the 0 ... 20 mA standard is often used.
It will be good if you arrange your videos in systematic manner..It will be easy to watch...
Thanks for the feedback, Abhijit!
Thanks
Thanks
You're very welcome!