Copyright 2009 MEI-Charlton, Inc
7220 North Lombard St. | Portland, OR 97203-3208 | Phone: 503-228-9663 |Fax: 503-228-4065 | E-mail: firstname.lastname@example.org
Engineering and Science Consulting
Expert Witness Testimony
Product Evaluation and Testing
Testing Laboratory Services
Materials and Metallurgical Testing
OVER 70 YEARS OF EXCELLENCE IN ENGINEERING AND SCIENCE CONSULTING, TESTING, FAILURE ANALYSIS ......
Professionalism with Personal Touch : 503-228-9663
The heart of MEICís strain gage ability and what sets us apart from the competition is our data acquisition
system. Our eDAQ made by Somat Products Division is an extremely fast, rugged, stand alone system
which can even be remotely operated via the internet. This high-level dynamic system lets us take up to
100,000 samples a second for each of the 64 independent channels. Thatís a total of up to 6.4 million
samples a second. With 64 channels, all able to simultaneously use different sensors, we possess the
potential to obtain data from 256 different strain gages.
The ideal strain gage would change resistance only due to the deformations of the surface to which the
sensor is attached. However, in real applications, temperature, and material properties, the adhesive that
bonds the gage to the objectís surface, and the stability of the metal all affect the detected resistance.
Because most materials do not have the same properties in all directions, knowledge of the axial strain
alone is insufficient for a complete analysis. Poisson, bending, and torsional strains also need to be
measured. Each requires a different strain gage arrangement.
MEICís experienced engineers are able to help you identify the most effective configuration for your strain
We construct our Wheatstone bridges using best quality component circuits. These automatic bridge
completion circuits allow us to set up multiple gage configurations quickly and efficiently by programming
our system prior to the actual job either in the lab or on site. These modules support multiple bridge
configurations all in one unit. This allows MEIC the ability to customize the gage setup to our customerís
needs. They also allow MEIC to condition the signal coming from the gages on the front end which
ensures quick processing times for the huge amounts of information we can gather.
MEIC has experience putting strain gages on a variety of structures
and products in a wide range of sizes. Using our technologically
advanced system, we have measured strain in bridges, shafts,
circuit boards, multi-tools, building foundations, and a multitude of
other products. We have helped balance a 3.2 million pound draw
bridge counterweight and tested server blade circuit boards. MEIC
has the expertise and the technology to efficiently meet your strain
gage needs. Give us a call.