What is the working principle of oxygen analyzers(zirconium oxide type) used in CFBC boilers?
Answers were Sorted based on User's Feedback
Answer / suresh xavier
there are two parts one is the sensing part and other is
converter. sensing part contains zirconium and heating
mechanism. the main caractristic of Zr. is at higher temp.
(= 750 deg.) the proprty of Zr., it allows the O2 ions to
conduct. to maintain the Zr. at 750 deg. normally we use
platinum electrode on the both side to create a heating
mechanism. when the probe is placed in the flue gas path one
side of the probe will maintaine the span gas (instrument
air contains 21% O2) and the other end is in the flue gas
path contains unknown % of O2. thus it will create a diff.
partial O2 on the each side of the cell. electrode in
contact with higher O2 pressure act as -ve electrode and it
will create an emf. the coverter pck that emf and using the
calibration produce the % O2.
calibration.
for zero calibration use zero gas (0.98% O2 ~~ nitrogen gas)
is used
for span we use 21% O2 (instrument air)
| Is This Answer Correct ? | 32 Yes | 2 No |
Answer / arsi vadher
what is out in MV and % of oxyzen when on Both side pressure is Atmospheric?
| Is This Answer Correct ? | 5 Yes | 0 No |
can anyone can let me know in Eurotron Micro cal 2+ calibrator in milli amps source mode we are not able to get 20 milli amps output it only produces 1.52 milli amps out, but display shows increase in milli amps , and err6 displays, let me know how to remove the err 6.
how to rectify the problem ,if we erected the DPT instrument wrongly of hp on lp side and lp on hp side?
What is difference between converter & transducers?
How comparison of objects is done in PHP5?
can a control valve works without positioner?why need tunning of c/v?
generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?
where can i find a flameproof hmi unit?
how radio frequency level probes works with its controller ? what is its principle ? pls give me brief explanation?
I have a LT of 10000mmwc range. can i use this LT in 1000mmwc range of tank?? if yes than what happened???
Please explain about FAT? What is the difference between FAT and SAT?
Describe the basis on which alarms should be generated and how their associated priority is determined
If fire would be inside the plant which fire detector is to detected the fire.
Civil Engineering (5086)
Mechanical Engineering (4456)
Electrical Engineering (16639)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)