Interested to Buy Any Domain ? << Click Here >> for more details...
i have one absolute pressure transmitter for the range is
-400mmhg to 400mmhg. If i do the zero trim at atmosphere the
transmitter should be give 4ma or 12ma? which one is correct?
- 2 Answers
- 8006 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / banerjeenandan
Your transmitter has a range of 800mmhg. The LRV is -400mmhg
and URV is +400mmhg. So at atmosphere you will get 12mA. all
the time, because atmosphere is Zero gauge pressure
(perfectly mid value in between the LRV and URV).
If you do zero trim at atmosphere, it will take "ZERO" with
the atmospheric pressure. The range of the transmitter will
not change. The range will remain 800mmhg. But your LRV will
change to 0mmhg and URV will change to +800mmhg. So in that
case, without any process connection it will give 4mA.
| Is This Answer Correct ? | 25 Yes | 1 No |
Answer / senthil.doosan
-400mmhg= -0.53bar
400mmhg = +0.53bar
if u do zero trim by opening the valves with respect to atm
the output of the transmitter is 12ma
without any process connection the output is 4ma
| Is This Answer Correct ? | 7 Yes | 0 No |
Why 4ma - 20ma signal used in instrumentation??
LADDER LOGIC Can any body state Logic on following condition Instructions to use 1-XIC 2-XIO 3-Output ONLY Program Push 1st button On - 1st lamp should On Then Push 1st button Off - 1st Lamp Should remain on Push 2nd button On - 1st lamp should Off and 2nd lamp should On Then Push 2nd button Off - 2nd Lamp Should remain on.
Give me best instrumentation Books name..Ple...
what is linerity and non-linearity?
what is the characteristics of control valve?
hi i am eswar i want to know the instrumentation interview questations for eil(engineers india ltd) i have applied for engineer post in eil please help in this.my mail id eswar310@gmail.com
What is minimum distance between three thermocouples (2oo3) mounted on same pipe line (20")? Technically accepted by stright line mounted or circler mounted?
why we used for range in pnumatic 3-15 psi and current 4-20 ma?
what is piezo electric transducer?its principle?
How is work 5/2 sov?
What is the difference between a double acting and single acting positioner? what type of valves use single acting positioners?
1 Answers AquaTech, NamPower, Samson Resources,
Why rdt and thermocouple both give different output .and one things more, how to generate ohm or mili volt plz mail me merajalam143545@yahoo.com
-
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)
