Answer / mohamed yousuf(instrumentation

radar type level transmitter works on the principle
of "time of flight system " actually this type of
transmitter having antenna used to send and recive the
micro waves these waves having the frequency range in GHZ.
by calculating the time required to send and recieve the
data the distance can be calculated from the following
expression
velocity=2 distance/time
therefore distance =velocity *time /2

for zero level 4ma and for span 20ma has to set

Answer / vikram kumbhekar

first of all we calculated the total lenth, then set 4mA at
zero level & max lenth at 20mA. When we send a RF freq
signal the time required to recieved the signal,that time
will be calculated by following formula

distance=velocity*time/2

in this way we get the value

Answer / vsraj_ece

radar level txr as a geiger counter and the source is emits
the radio waves into the vessel it contains some liquids the
ionised radio electrons move to the chargable ends as a
measurement unit if low liquids are in vessel means higher
electrons move to measurement unit.

Answer / jamal qamar

Radar level measurement is based on the principle of
measuring the time required for the microwave pulse and its
reflected echo to make a complete return trip between the
non-contacting transducer and the sensed material level.
Then, the transceiver converts this signal electrically into
distance/level and presents it as an analogue and/or digital
signal. The transducer’s output can be selected by the user
to be directly or inversely proportional to the span. RADAR
LEVEL MEASUREMENT BASICS

what is piezoelectric transducer?give an example in power plant n state its principle?

0 Answers   Jindal,

---

how to explain PID?

2 Answers   Jindal,

---

We have a Yokogawa Micro-XL DCS, which is having around 300 I/O, but whenever there is any wire gets grounded in field, the 24v supply to all loops gets dipped & all the indications at DCS goes to IOP(shows input open), at present we have fixed 500mA fuses in all the lines but which does not working. Does it required to replace with lower amps fuse, then how much or is there any other solution for this.

2 Answers  

---

As an industrial instrument technician what we have to know?

3 Answers  

---

What is the procedure of mounting new positioner on pneumatic control valve?

1 Answers  

---

In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

0 Answers  

---

wht is Zero Elevation and Zero Suppression?

12 Answers  

---

what is the differnce between PLC & DCS

7 Answers   TVS,

---

wt kind of business we can do by usig PLC?

2 Answers   Dabur,

---

In vortex flow meter how can measure the frequency of vortex generated by vortex flow meter

4 Answers   Cadila,

---

what are the types of a thermocouple

2 Answers  

---

In Boiler Drum Level- Level control valve how can it tuning (PID)?

2 Answers  

---