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Design concept of performance test equipment for servo-valve consists of mechanical and electronic systems. The mechanical parts includes a hydraulic power pack equipped with safety and monitoring of pressure and flow-rate, servo-valve and its base-plate, flow-meter for monitoring flow-rate in A and B ports. The electronic system parts includes a signal generator to the servo- valve, output signal from flow meter A and B ports, acquisition for signal output flow-meter, hardware and software computer. The form of graph Input Signal (m- Ampere) versus Output Signal (LPM) can help analyze to determine servo-valve performance, that are accuracy and detect damage which can be taken for further maintenance and repair. Keywords : servo-valve, signal input, flow rate output , performance test machine. Abstrak Konsep desain alat uji kinerja servo-valve terdiri atas konsep desain mekanis dan konsep desain elektronik. Konsep desain mekanis meliputi hydraulic power pack yang dilengkapi pengaman dan monitor tekanan dan flow- rate, servo-valve dan base-plate-nya, flow-meter untuk monitor flow-rate di port A dan B. Konsep desain elektronik meliputi pembangkit signal input kepada servo-valve, signal output dari flow-meter A dan B, akuisisi signal output flow- meter, hardware dan software komputer. Grafik Signal Input (m-Ampere) versus Signal Output (LPM) dapat membantu analisa untuk mengetahui kinerja servo-valve antara lain keakurasian, mendeteksi kerusakan servo-valve untuk selanjutnya dapat diambil tindakan pemeliharaan dan perbaikan. Kata Kunci : servo-valve, input signal, output flow rate ,alat uji kinerja.

KONSEP DESAIN ALAT UJI KINERJA SERVO-VALVE = DESIGN CONCEPT OF TESTING MACHINE OF SERVO-VALVE PERFORMANCES