Answer / harsh zala

Fiber optic uses signals to be transmitted in form of light.
There are certain instruments which allows us to check the
signal level of fiber optic cable. The instrument name is
OTDR.
Through which we can check the fiber optic cable.

Answer / abdus sattar mollah

by instrument name OTDR: Optical Time Domain Reflexometer.
It injects laser beam into optical fiber through patch cord
and provides a graph between attenuation (dB) and Distance
(m).{performance decresess for shorter distance)
The graph's nature shows the cable performances.The graphs
has rising peaks followed by decaying lines.Spikes in the
decaying lines indicates severe loss.So,if we have smooth
decaying graph then it reflects good optical fiber
path.Whereas Spikes in curve indicates energy loss which
can be corrected by maintenence of Media Converter(OFC)
converter.Also the splice joings of fiber should not exceed
a maximum 0f 0.1 dB (calculated by Arc splicer Instruments).
Thats is how i have worked for communicating RTU panels
with SCADA server at Mangal PAndey Water Treatment
Plant,Barrackpore,West Bengal

Answer / jignesh

optical fiber cable is transmit the signal in form of
light,it will be measure such a instrument is OTDR .


RTU - stand for remote terminal unit . it collects all data
from the field , in field numbers of rtu is availble and
send a signal to one MTU. MTU is stand for Master Terminal
Unit which give signal to scada computer is Supervisory
Control Data Aqusition system.

Answer / praveen kumar

by instrument called OTDR

RTU remote Terminal Unit, for SCADA system used,all the
calbes are connected in RTU only.

Answer / sagar

Otdr is a simple instrument to use of identity the fault of OFC cable.

how we can check level probe and controller

2 Answers  

---

what is weighfeeder

2 Answers  

---

one rtd sensor which is connected at middle of distillation column where actual temp. is 100deg but when we tight this sensor at thermowell end it goes down to 90 deg & when remove from the thermowell(but sensor end dipped in well) showing actual reading, what is reason?

3 Answers  

---

I want to install analog type, flange mounted gas flow meter (line size - 2"), for CNG flow measurement.Kindly give some details of flowmeter or suppler name, available in India.

1 Answers  

---

what is shutoff dp? why is it important for selection of a control valve?

1 Answers  

---

---

What is the purpose of MATLAB?

3 Answers  

---

My question may be very basic or childish but this question still persists in me, someone plz help me 1.why do we go for differential equations to analyze a system? 2.why do we solve it using matrices, is there any specific reason for using matrices other than the stories like it is simple,faster etc.

2 Answers  

---

what is the use of glycol filling in seal pot (or) condensate pot in instrument impluse line?

7 Answers  

---

what is concept of field,control room area in transmitters?

1 Answers  

---

what is cavitation ?

7 Answers  

---

Any Transmitter Range (Span value) start from 2?

1 Answers   Exxon Mobil,

---

Hi i m B.E. In elect. & comm. I m workin in bio mass plant from 6 mnths as inst. Engg. but now i m in dept. Of operation as shift engg...which is best operation or inst. 4 me? M confusd..plz help and reply me..

2 Answers  

---