how checking is done in fiber optic cable?
explain the working of RTU?
Answer Posted / 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
Is This Answer Correct ? | 24 Yes | 2 No |
Post New Answer View All Answers
What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?
How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks
Explain plc level and its type?
this site is owned by an nonsense
how many types of preheaters are in cement industry & what r they can any body explain?
what is metal of piston ring
Is there any relation between Artificial Intelligence and Instrumentation?
Define the difference between a stable versus an unstable controlled system and some of the tools you might use to be able to detect when this is happening and assumptions used for control system application design that could contribute to instability
what is the procedure to callibrate temp controller ,pressure controller,etc. suppose a temp controller showing error 1.5 degree centigrate how can i minimize it.
what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.
What is difference between “Fault Tolerant” & “Fault avoidance” PLC? Application where these system s are used?
send me last 5 years questions asked in rrb chennai, for section engineer
How is PH sensor works ?
What is the use of single seated valve?
hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....