Interested to Buy Any Domain ? << Click Here >> for more details...
how can we calibrate RADAR LEVEL transmitter 0% to 100%
- 3 Answers
- 43904 Views
- Chevron Phillips, Honeywell, I also Faced
- E-Mail Answers
Answer Posted / sam
You need to be more specific in your questions but I assume
you are referring to the frequency modulation radar (cone
type) and not the wave guide pulse radar (TDR).
This is a very generic procedure, use your radar's vendor
manual to do the calibration.
Take a measuring tape and measure the actual distance from
the cone to the zero position and the 100% position in your
vessel. If it is a closed pressurized vessel use the design
engineer's internal vessel drawings. If all else fail use
the dimensions of the vessel itself to determine what and
where z/100% is on the vessel. Use the vendor manual to see
how to use these measurements. It might be as simple as
entering these values directly as your z/100% calibration
values or you might have to do a small calculation like
maximum possible distance (tank depth) minus z measured
distance equals zero distance, and maximum possible (tank
depth) distance minus 100% measured distance equals 100%
distance.
Also keep in mind radars are distance measuring instruments
and not level measuring instruments and the fact that the
distance measurement is the exact opposite of level in
relation to the total distance measurement. This means if
your tank total distance is 3 meter (assuming tank bottom is
also zero position) and your radar measures a DISTANCE of 2
meters to the top of your product in the tank, the actual
LEVEL in the tank is only 1 meter.
It is easy to look at the disply on the radar and think this
is your actual level measurment. You therefore need to
modify the local display to indicate level in mm or %, as
well as setup your output to level and not distance after
the calibration. The radar will then give out 4mA when the
tank is empty as per example above and 100% as the tank fill
up with product to the point where you have specified 100%
should be. If your output is setup for distance it will
output the exact opposite. Watch out!!
If you need a vendor manual download it from the internet.
Good luck
| Is This Answer Correct ? | 45 Yes | 3 No |
Post New Answer View All Answers
Decibel.
What is the use of control cable?
i have steam drum height 1000mm. and i want to placed the transmitter below the tap.how i calculate.
What is offset in a control system.
How to interfacing microcontroller with a DC motor
what is the difference between -24 : +24 & 0:24 and where it use?
What care will you take in the installation of control valves,SCADA,DCS and FOC in Oil and Gas Project?
Coal mill Instruments Equipments for cement plant And process diagram ?
What is instrumentation control?
What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?
please any body have most important data for study for saudi aramco test of instrument QC thanks email shahnaveedullah@gmail.com
We are using Rosemount 5400 series Radar Level Transmitters in all types of Sump Applications having oily water hdrocarbon petrochemical nature. What we are facing the problem frequently is that always getting reading frezzed at some value. If we do power recycling , sometimes it is working . then making same freezing problem. If anybody faced before such type of problem and also having solution , Please give the answer.
How can a d.p. Transmitter be calibrated?
what is droop in governer ,type of droop ,how it work
what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .
