How to calibrate a Leveltrol in the field?

Instrumentation Calibration
1

calibrate a Leveltrol

calibrate%20a%20Leveltrol

Calculation # 1 If the calibrating liquid is water: Process Liquid Density / 1* Displacer height = mm of H2O.

Calculation # 2 If the calibrating liquid is other liquid: Process Liquid Density / Calibrating liquid density * Displacer height = mm of H2O. (Calibrating liquid height in mm).

  1. First close both the primary isolation valves and drain the liquid inside the chamber.
  2. Adjust the zero to get 0% output.
  3. Connect a transparent PVC tube to the drain point as shown in hook up.
  4. Fill it to the center of the top flange.
  5. Adjust the specific gravity or span adjustment (Electronic Level).
  6. Fill it up to 50 %, check linearity.