EDISON HLMs accommodate applications varying from one channel to hundreds of channels and test durations varying from a few hours to several days.
The EDISON Hydraulic Load Maintainer, or HLM, modulates hydraulic fluid to control the application of loads during a test. The HLM receives hydraulic fluid from a hydraulic power unit, and distributes the fluid to loading cylinders or jacks to obtain the desired loading profile.
 
An EDISON HLM is Currently Being Used by the University of Toronto to Control their Concrete Shell Element Tester
View the Shell Element Tester