| Other Instrumentation Interview Questions |
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|what is diffrence between analog card and digital card in
plc.how analog card work,Please explain in detail.Please
send it on firstname.lastname@example.org
|why 4ma show higher zero ?
i have transmiter flow renge 0-1000 m3/h but 4 ma show in
monitoring 200 m3/h and 20 ma show 1000 m3/h i want when 4ma
show 0 m3/h and 20ma 1000m3/h
|Why we are using 4-20 mA as Analog signal transmission
other than 3 to 19 or 2 to 18 or 6 to 22 like wise ? What
is the reason behind using 4 & 20 mA? Can anyone give
proper technical reply ?
|what pressure transmitter?
|which one is best profibus or RS485 for communication?
|Why only negative 24 vdc supply give in vibration measuring
|what is PID n give me brief info. about P&I&D.
|hi this is noor i wnt know the procedure and precations
errection for PRESSURE AND DP transmitters?
how to take impusle line for level and flow?(water and
impulse line sizes? and type of material ?
plz give me answer / reffer any website ? to me
|Where we r using split range and ratio controller?
|In RTU Panel we are having several Analogue & Digital
Inputs /Outputs. We are recently facing some problems over
Analog inputs , which are not updating properly (But
Digital Input are updating normally) Can any one tell me
from where the problem is creating , we have checked PLC
CPU card, Analog Input card & we reconfigured ,But still
the issue is there.
1. Sometimes Analog values are updating & sometimes not.
2. Analog values are not updating normally , showing some
3. Total dead (0 value)
Analog values are Level & flow measurement from the field
(But in field the instruments are working normally &
Displaying the values normally in local display unit)
This problem we are facing in our Water Plant.
If any one experienced this same problem or having any
ideas related to our issue PLS send your valuable
|A pressure differential gauge type of instrument has a
manifold with 2 isolation valves (hp and lp),2 vents(1 each
for hp and lp) and 1 equalizing valve. Determine the
position of each valve(either fully closed or fully open)
when troboulshooting to:
1. zero the transmitter.
2. determine if there is a block in the impulse line.
3. determine if the gauge is functioning properly.
The process fluid is water.
|how to check electrical health of vibration probe?
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