The Transportable Emissions Monitoring System (TEMS) is being developed to meet the needs of the stack tester while specifically conducting a CEMS RATA. Additionally, the application will support compliance test runs. TEMS is a mobile data acquisitions system (DAS) designed to interface with the Teledyne Monitor Labs TEMS controller.

The TEMS database was initially designed to not only provide a means to collect and control a stack test but to generate the final test report including information about the company, contacts (test personnel, protocol gas provider and test company certification), source stratification test and traverse points, as well as pre-test calibrations. Tester notes can be used to document testing issues, delays in testing, or deviations from the test methods.

TEMS allows the connection of two TEMS controllers. By providing connectivity to two controllers TEMS can monitor and control two concurrent stack tests.