what is fire and gas system?
- 2 Answers
- 12684 Views
- Andhra Petrochemicals Limited, I also Faced
- E-Mail Answers
Answer Posted / ajith294
Fire and gas system usually as part of a saftey system. the
percentage of Lower Explotion limit shall be dectected by
GAS detector and gives the alarm ,normally 20% is High and
40% is High High alarm.
catalytic bead sensor, semiconductor sensor, infrared point
sensor and ultrasonic sensor are using to detect the gases.
there was no establised standared to difine zero air for
calibration. some procedure says pure nitrogen and some
uses sytetic air. But much more realisitc and practical
using ambient air for zero calibration , when area is
considered to be clean.
for span calibration using 2.5 %Methene (CH4) and balance
nitrogen mixer. 2.5 %Methene (CH4)is equal to the 50 % of
LEL.
| Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
How to Calibrate Level Switch in field
What is difference between radial vibration and axial vibration explain in detail .
In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits.
Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...
how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?
in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.
What is cut off relay? And why use in PLC and DCS?
How will you calibrate PID controller? explain with example.
what do u mean by compensation n pid tunning?in pid tunning what you tunned?is it possible 2 tune p i d
Derive capacitance to 4-20ma conversion formula / relation in capacitance type pressure sensor?
What is the advantage of using locally fabricated hook ups over Pre fabricated hook ups in process instrumentation?
flow transmitter formula?
what is scale factor of proximitor & unit of the vibration.
can anyone tell me about the basic concepts to consider before to start a PLC panel wiring
What are the key features of a Distributed Control System? describing the various layers (sensor through to business system interfaces) as well as the hardware, software and security aspects of the DCS.
