MIL-HDBK-786, MILITARY STANDARDIZATION HANDBOOK: FIELD ASSURANCE OF ACOUSTIC EMISSION SYSTEM OPERATION USING SIMULATED ACOUSTIC EMISSION EVENTS (01 OCT 1987)., This handbook provides a procedure for assuring the proper operation of an acoustic emission system installed on a field test article. This handbook allows the user: 1. to insure that no degradation of performance has occurred from the laboratory sensor/system calibration upon arrival at the test site: 2. to check for proper sensor installation and coupling to the test article before the test; 3. to provide a method for adjusting all system channels to similar sensitivity levels prior to testing; and 4. to detect any performance changes during the test due to electronic malfunctions or sensor coupling problems.