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The graph shows a plot of applied torque and resulting clamp-load from the ultrasonic data acquisition unit. This ability allows MERC to determine if the proper clamp-load was established when the fastener was initially tightened. It also allows MERC to actively measure the clamp-load of a joint under test to determine if clamp-load is reduced or lost as a direct result of load application. Back to RHD Division Homepage MERC has the ability to measure the clamp-load developed in a threaded bolted joint as it is being tightened on a structure or component. MERC also measures clamp-load in a joint while it undergoes static or dynamic testing. This is accomplished with the aid of an ultrasonic data acquisition system. This system can utilize inputs from several transducer devices (torque transducer or electronic torque wrench and simultaneously record the ultrasonic signal from the bolt. Area of Expertise - Threader Fastening Testing © 1987-2009 Mercer Engineering Research Center 135 Osigian Blvd. • Warner Robins, GA 31088 info@merc-mercer.org • www.merc-mercer.org • 478.953.6800