Hydraulic Hand Pump Calibrator - High-Accuracy Pressure Calibration Tool for Industrial InstrumentsHydraulic Hand Pump Calibrator: Precise Pressure Calibration Tool with Safe Operation Guidelines This hydraulic hand pump calibrator ensures accurate pressure calibration for industrial instruments. For optimal performance and safety: Use within rated pressure range; never exceed the measuring range. During transport, lock the exhaust knob, place the hand lever flat, and fully screw in the fine tuning pumps screw rod. Keep the exhaust knob open