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    Application limits of a Leveltrol and a static head level transmitter?

    Question: What are the application limits of a Leveltrol and a static head level transmitter?

    Answer:

    A Leveltrol can measure only for a short and fixed height of level. A Leveltrol has a high gain output. In can be used for liquid level as well for the interface level measurement.

     

    Static head transmitter [...]

    What is a static head level transmitter?

    Question: What is a static head level transmitter?

    Answer:

    A static head level transmitter is used for measuring the total liquid level in the tank.

    Explain how a Leveltrol works?

    Question: Explain how a Leveltrol works? Name the parts of a pneumatic Leveltrol.

    Answer:

    A Leveltrol in and instrument used for measuring the liquid level between two known points. The Leveltrol works on the buoyancy principal. Leveltrol has a float, which submerses proportionately with liquid level raise in the float chamber. The amount of [...]

    What is an “interface dip tape”?

    Question: What is an “interface dip tape”? Where it used?

    Answer:

    Interface dip tape is an instrument used for measuring the total and the interface liquid level in vessel.

    For example: It is used in oil storage tanks to measure the total liquid level and water level.

    What is the density of crude oil?

    Question: What is the density of crude oil?

    Answer:

    The density of crude oil is approximately 0.8.

    How to convert a pressure gauge into a level gauge?

    Question: How to convert a pressure gauge into a level gauge?

    Answer:

    Calculate the static head in kpa using the formula “pgh”. Select a pressure gauge and calibrate it for the calculated static head. Graduate the pressure gauge scale in terms of %of level.

    Simple methods for measuring level?

    Question: What are the simple methods for measuring level?

    Answer:

    Gauge glass, Pressure Gauge – scale graduated in % of level, Rope and weight , Dip Tape…etc

     

    Formula for calculating a static head in kpa?

    Question: Write the formula for calculating a static head in KPa?

    Answer:

    Static Head = pgh

    p= Density of the liquid

    g= Gravity

    h= height of the liquid column

    What-test equipment is required to calibrate a pressure transmitter in the field?

    Question: What-test equipment is required to calibrate a pressure transmitter in the field?

    Answer:

    If it is a low range transmitter, then precision pneumatic test equipment like “wallace and tiernier” and pneumatic pump (or air supply) may be used.

    If it is a high range transmitter, then a hydraulic pump and a test gauge [...]

    how to carryout a field zero check on a pressure transmitter?

    Question: Explain how to carryout a field zero check on a pressure transmitter?

    Answer:

    If the transmitter signal is used for controlling, then put the controller on manual. Connect a digital multimeter in the current range in series with the transmitter output. Isolate the process valve Isolate the instrument isolation valve. Open the equalising [...]