Calibrating Level Instruments (AIC05)

This lesson demonstrates procedures for for calibrating level instruments.

Prerequisites

This lesson is designed for participants familiar with the basic principles of calibration including procedures, common instrument errors, and the standards for instrument performance. An understanding of algebra is also recommended.

Description

This lesson demonstrates the steps for calibrating level instruments. Specifically, the lesson shows set-up procedures for differential pressure transmitters and electronic displacement level transmitters in a variety of applications.

Objectives

Identify the importance of properly calibrated level instruments. Describe how hydrostatic pressure can be used to sense liquid level. Determine the input range for calibrating a differential pressure transmitter for use in a specific level application. Select the input and output measurement standards for calibrating hydrostatic level instruments. Calibrate a differential pressure transmitter used in an open tank or dip pipe, a closed tank with dry leg, and closed tank with wet leg. Define elevated or suppressed zero and determine the amount of zero suppression or elevation in a given hydrostatic pressure level gaging. Select the input standards for calibrating an electronic displacement level transmitter for liquid-vapor and liquid-liquid interface applications. Select the output equipment for calibrating an electronic displacement transmitter. Calibrate an electronic displacement level transmitter for liquid-vapor and liquid-liquid interface applications.