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As designers of power units for general and business use liquid crystal projectors (such as for airplanes), we use the PZ4000 to measure rated power consumption and to check the power control of projector lamps. Power control for lamps is rather difficult. We use the trend analysis function of the PZ4000 to measure power changes, and the trigger function to measure electronic noise. We then try to determine whether noise is negatively affecting the electrodes in the lamps. Very strict design rules are applied to projectors used in airplanes to insure that other flight instruments are not adversely affected. The PZ4000 is very useful for such design as it analyzes power unit harmonics up to 500 orders. Additionally the PZ4000 has helped us to improve power factor circuit performance and energy consumption efficiency.
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