Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...


Guy's need your support,I want to measure closed tank level which is under vacuum -630mmHg using DP Transmitter, tank fluid density 1.38, Tank height is 7ft

Answers were Sorted based on User's Feedback



Guy's need your support,I want to measure closed tank level which is under vacuum -630mmHg usin..

Answer / r_vaya

In such case vaccume will apply in both lags  equally .
Now hight is 7 ft and density 1.38

7 ft is equal to 84 inches 

So ,
84 X 1.38 = 115.92 inches of H2O became our span.

1 inches of H2O = 1.87 mmHg

Thus,
115.92 inches H2O = 216mmHg

tank is closed thats why ,

LRV  =    - 216 mmHg
URV =      0 mmHg

Is This Answer Correct ?    5 Yes 1 No

Guy's need your support,I want to measure closed tank level which is under vacuum -630mmHg usin..

Answer / sr

mothods of measurements don't change with change in line pressures ... the methods r same for both +ve and -ve pressure .... in vacuum u just have to take care that vacuum shud not break ....

Is This Answer Correct ?    1 Yes 0 No

Guy's need your support,I want to measure closed tank level which is under vacuum -630mmHg usin..

Answer / carl_ellis

A differential pressure transmitter is required to correct for vacuum pressure. The DP's low side is installed high up, tapped into the vacuum and the DP's high side tapped in near the bottom.

The DP transmitter's minimum range (LRV) is zero

The DP transmitter's maximum range (URV) is:
maximum level height (inches or mm) * specific gravity

Liquid level = measured pressure in water column units (inches or mm) / specific gravity

Many digital indicators just scale the 4-20mA to the desired level range; so a calculation involving specific gravity isn't needed.

For example:
4.0 mA = 0.0 inches level
20.0 mA = 84.0 inches level

Carl Ellis
Measure First

Is This Answer Correct ?    3 Yes 4 No

Guy's need your support,I want to measure closed tank level which is under vacuum -630mmHg usin..

Answer / dhananjayk

Delta P=(h1-h2)

Is This Answer Correct ?    0 Yes 2 No

Post New Answer

More Instrumentation Interview Questions

Tell me about PID Tuning and what is PID.

4 Answers  


Where Can i take a SPI INtools training in Mumbai? In Rolta India Ltd to whom I should approach regarding of SPI INtools Training?

0 Answers  


how in the 2 - wire transmitter, 24v supply and the 4ma signal gets in the same path?

1 Answers   Yokogawa,


what is the deference bitween DCS and PLC SCADA HMI System for Power Process Industry.

1 Answers   UltraTech,


why use squareroot in flow measurment by dp transmitter?

4 Answers  


Which types of quections asked in interview for FORMULATION PLANT (PHARMA)

0 Answers  


Where should we terminate the shield and why?

3 Answers   OPaL,


what is consistency transmitter and describe its working?

1 Answers   Emami,


Can anybody please let me know Orifice plate sizing calculation formula and step by step procedure

0 Answers  


I have a problem with a valve (air to close). When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%. I tried to tune positioner then removed it, the problem still exist. Any idea

3 Answers  


Absolute pressure is 700psi,what will be the gauge pressure?

1 Answers   IFFCO,


use of split range ? where it is used ? in which control loop it is used ?

0 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5086)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4456)
  • Electrical Engineering Interview Questions Electrical Engineering (16639)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)