Level Measurement & Control


Application note: Process control calibration made easy with Agilent U1401A

September 2009 Level Measurement & Control

Abstract

In today’s world, the 4–20 mA current loop is a common method of transmitting sensor information to a remote location in industrial process-monitoring applications. Physical parameters such as temperature, pressure, speed, and liquid flow rates in the manufacturing processes are converted into signal current 4–20 mA with a signal conditioner. The 4 mA current normally represents the sensor’s zero-level output, while the 20 mA represents the sensor’s full-scale output. However, transmitting a signal current over a long distance to another system with a different ground loop may cause serious signal disruption. Loop powered isolators will eliminate the ground loop in the control systems.

This application note explains how the Agilent U1401A with simultaneous source and measure functions eases technicians’ calibration tasks in industrial process control applications.

To read more about the full article, visit: http://instrumentation.co.za/+C13062

For more information contact Steve Alves, Concilium Technologies, +27 (0)12 678 9200, steve_alves@concilium.co.za, www.concillium.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Level measurement in silos
January 2020, Morton Controls , Level Measurement & Control
UWT has taken a traditional method of content measurement in silos and storage hoppers and remastered it to enable seamless integration with modern-day control systems and PLCs. The UWT NivoBob continuous ...

Read more...
Digital float switch
January 2020, WIKA Instruments , Level Measurement & Control
As its first instrument of this kind, WIKA has launched a float switch with a PNP/NPN output signal. The model GLS-1000 detects the level of liquids with an accuracy of 1 mm or less. The digitised float ...

Read more...
Radiometric solutions in refineries
November 2019, Mecosa , Level Measurement & Control
Berthold Technologies’ radiometric instruments for non-contacting level and density measurement are widely used in the oil refining industry, where customers include Exxon Mobil, Sinopec, Shell, BP, Conoco ...

Read more...
Interface measurement in desalters
November 2019, Mecosa , Level Measurement & Control
Interface measurements in desalters are often regarded as non-critical, even though every drop of oil to be refined passes through the desalter. As refineries try to maximise their margins, so-called ...

Read more...
Level monitoring of groundwater
October 2019, WIKA Instruments , Level Measurement & Control
Much of our drinking water is extracted from subterranean resources. Water that falls to the surface of the Earth drains not only into rivers and lakes, much of it will permeate into subterranean reservoirs. ...

Read more...
Ultrasonic sensor for remote water level measurement
October 2019, Instrotech , Level Measurement & Control
Instrotech has available the Senix ToughSonic CHEM range of ultrasonic sensors, in service around the world in some of the most demanding and corrosive industrial environments. They measure a wide variety ...

Read more...
Simple measurement of liquid levels
October 2019, VEGA Controls SA , Level Measurement & Control
In 2016, VEGA introduced the Vegapuls 64, its first radar level sensor for liquids that measures at a frequency of 80 GHz, which allows considerably better focusing of the radar beam. With Vegapuls 64, ...

Read more...
Density compensated pressurised vessel level measurement
October 2019 , Level Measurement & Control
The traditional approach to level measurement in closed vessels such as boilers, evaporators, crystallisers or distillation columns, has been to use a conventional differential pressure (DP) transmitter ...

Read more...
Kobold’s new float level switches
August 2019, Instrotech , Level Measurement & Control
Kobold’s M-series level switch comprises a float that slides up and down with the liquid along a guide tube. Thus, up to 4 reed contacts moulded in the guide tube are switched in a non-contacting fashion ...

Read more...
Foxboro buoyancy level transmitter
August 2019, I-PAS (Industrial Process Automation Solutions) , Level Measurement & Control
Principle of operation When an element a (displacer rod) is immersed into a liquid, according to Archimedes’ Principle, the displacer will ‘lose’ some of its weight proportional to the level of the liquid ...

Read more...