HSI Test Fixture

HSI Test Fixture

This test fixture provides the necessary panel controls, switching and cable pin-outs required to test the KPI-552/KPI-553/A series of HSI's as described in their respective maintenance manuals. This fixture will serve as the "Instrument Bench Tester" and does have the required differential resolvers and relay switching. Panel jacks are provided for the Heading, Course, RMI and ADF synchro sources that are external to this fixture. The use of external synchro sources serves to minimize the cost of this panel. Additional items incorporated on the panel are test jacks to monitor the meter drive voltage and current as well as a momentary switch to open the meter drive and this serves to verify sticky meter stops. The fixtures rear panel provides for all power inputs as well as an I/O connector if the shop desires to interface an external synchro panel.

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