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Inst Tools > Blog > Formulas > Level Calculation with Remote Seals

Level Calculation with Remote Seals

Last updated: April 19, 2019 5:48 pm
Editorial Staff
Formulas Level Measurement
2 Comments
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Diaphragm seals for tanks under Vacuum

The transmitter must be mounted level with or below the lowest tap to ensure positive pressure at the transmitter.

Contents
Diaphragm seals for tanks under VacuumDouble Remote Seal ApplicationDensity Calculation with Remote Seals TransmitterInterface Calculation with Remote Seals Transmitter

Level Calculation with Remote Seals

Dist. Between Taps = H

DP = Hside – Lside

DP = (L*SGp + h*SGf ) – (H+h)*SGf

DP = L*SGp – H*SGf

Double Remote Seal Application

Double Remote Seal Application to Measure Level

Calibration Range

LRV or 4mA point = Phigh – Plow
LRV = Head2 – Head1

LRV = (0.9*30”) – (0.9*100”)

LRV = -63”H2O

URV or 20mA Point = Phigh – Plow
URV = (Head2 + Head3) – Head1

URV = [(0.9*30”) + (1.1*50”)] – (0.9*100”)

URV = -8”H2O

Cal. Range = -63 to -8 in H2O

Density Calculation with Remote Seals Transmitter

Density Calculation with Remote Seals Transmitter

Max. Allowable ΔS.G = 0.2

Dist. Betw. Taps = 10 ft = 10 x 12” = 120”

Calibration Range

LRV or 4mA point = 120” * (SGp – SGf)

LRV = 120” * (1.1 – 0.95)

LRV = 18”H2O

URV or 20mA Point = 120” * (SGp – SGf)

URV = 120” * (1.3 – 0.95)

URV = 42”H2O

Cal. Range = 18 to 42 inH2O

Interface Calculation with Remote Seals Transmitter

Application Example: To determine % of interface of Liquid A with respect to Liquid B.

Interface Calculation with Remote Seals

Dist. Betw. Taps = 10 ft = 10 x 12” = 120”

Calibration Range

LRV or 4mA point = 120” * (SG1 – SGf)

LRV = 120” * (1.1 – 0.95)

LRV = 18”H2O

URV or 20mA Point = 120” * (SG2 – SGf)

URV = 120” * (1.3 – 0.95)

URV = 42”H2O

Cal. Range = 18 to 42 inH2O

Also Read: Level Switch Animation

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2 Comments
  • Karuna says:
    May 6, 2016 at 1:38 am

    Thanks for sharing the Remote Seals Level Calibration Procedure

    Reply
  • tad says:
    July 27, 2016 at 8:46 am

    wow this is fantastic

    Reply

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