# Calibration of a leveltrol for an interface level measurement

**URL:** <https://forumautomation.com/t/calibration-of-a-leveltrol-for-an-interface-level-measurement/65>\
**Category:** Calibration\
**Created:** [October 2, 2014, 5:50pm UTC](https://forumautomation.com/t/calibration-of-a-leveltrol-for-an-interface-level-measurement/65 "2014-10-02T17:50:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![instrumen](https://forumautomation.com/letter_avatar_proxy/v4/letter/i/65b543/32.png) [@instrumen](https://forumautomation.com/u/instrumen)\
**Post date:** [October 2, 2014, 5:50pm UTC](https://forumautomation.com/t/calibration-of-a-leveltrol-for-an-interface-level-measurement/65/1 "2014-10-02T17:50:43Z")

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Fill the leveltrol chamber 100% with the lower density liquid and adjust its zero for 4.00mA output. Drain the liquid and fill the leveltrol chamber 100% with the higher density liquid and adjust its span for 20.00 mA output.

The transmitter on line measures the percentage of higher density liquid in the lower density liquid at a known height.