How to Calibrate an AC-operated LVDT Linear Position Sensor

MarineLink.com
Tuesday, September 03, 2013
LVC-4000 (Photo: Macro Sensors)

Calibration is necessary before the installation of an AC- operated linear position sensor to ensure accuracy. Calibration corrects any slight variances between sensors, helping to improve repeatability.

Because of the linearity of LVDT Sensor output, a simple two-point calibration is simple. Two points should be as far apart as possible, but within the linear range of the LVDT Linear Position Sensor and preferable within the measurement range in which it will be used.

In applications where the LVDT is used on both sides of null, the calibration points should span the entire range of measurement. In these cases, it is desirable to use three calibration points: one at null and one at each end of the range.

Calibration should be performed as nearly as possible under conditions of actual use, including the same mountings and surroundings as well as the same excitation voltage and frequency.

Traditionally, AC-operated LVDT Sensors were difficult to calibrate as signal conditioners required that operators use trimmer pots. Modern signal conditioners, like Macro Sensors EAZY CAL Signal Conditioner , offer a virtually effortless front panel fingertip routine for easy field calibrations.

Macro Sensors has provided a video that shows the calibration of a LVDT linear position sensor using the EAZY CAL Signal Conditioner, explaining suggested calibration equipment, mechanical mounting of the signal conditioner, input and output connections, LVDT wiring, core position and the calibration routine: youtube.com/watch?v=pEOpI_ym2E8.

macrosensors.com
 

Maritime Reporter March 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Equipment

Damen Delivers Stan Patrol Vessel to RBDF

The Royal Bahamas Defence Force (RBDF) has taken delivery of the fourth and final Stan Patrol 4207, named HMBS Rolly Gray. The four Stan Patrol 4207s form part of the six-year Sandy Bottom project.

Radio Holland Wins Ahrenkiel Contract

Ahrenkiel Steamship GmbH & Co. KG and Radio Holland Germany GmbH, part of Imtech Marine, have agreed a long-term maintenance agreement for the entire Ahrenkiel Steamship fleet,

H2O’s Owens CrapZapper Offers More

H2O’s Owens CrapZapper marine sanitation device has dual certification to the latest IMO and USCG standards for operation anywhere in the world.   Features include low maintenance,

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Naval Architecture Offshore Oil Pipelines Pod Propulsion Port Authority Salvage Ship Electronics Ship Repair
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1161 sec (9 req/sec)