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This ATE system
calibrates and tests a personal RF safety monitor. A simple
pass/fail indicator is implemented allowing the use of
semi-skilled labor while comprehensive data sheets provide
detailed performance information on each unit processed. All
test data is permanently stored for later
analysis.
This R&D 100 Award winning product is a compact, beeper size device worn by personnel working in or around potentially hazardous RF fields. Electromagnetic energy in the radio frequency spectrum becomes dangerous when the fields are strong enough to cause heating of human tissue. To prevent injury, the safety monitor continuously measures and logs the field levels it encounters and alarms when field strength exceeds established safety standards. There are several different standards in use throughout the world and there is a corresponding safety monitor model for each.
Calibrating and testing this product in a production environment required an easy to use and reliable ATE system. A standard PC is used to control all test equipment and to record and print data. The software is written in Agilent's VEE Pro (formerly HP VEE) and test equipment is controlled via GPIB. All errors are trapped for graceful failure recovery.
The ATE software
prompts the operator for name, unit serial and model number.
Because there's a different model for each standard, the
software will set test limits and calibration algorithms in
accordance with model number. All operator instructions and
setup diagrams are displayed on screen eliminating the need
for paper procedures. Once calibration and test are complete
(approximately 5 minutes) the operator is given a clear
indication of overall pass/fail status. A detailed data sheet
is automatically printed showing the results of all tests
performed. All test data is then permanently stored to disk.
ATE data can be recalled and reprinted at any time. In
addition, the ATE software allows historical data to be
manipulated and graphed to aid in statistical process
control.
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Last
modified: 01/06/2004
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