Hydraulic Control System of Hydraulic Universal Test Machine Introduces Maintenance: The test machine should be installed in a clean and dry room with uniform temperature, and the possibility of long beam bending test on the machine and the possibility of using mirror extensometer for test should be taken into account. Therefore, sufficient free area should be left around the test machine. The main body of the testing machine and the dynamometer do not need special foundation when they are installed. The general foundation is made according to the foundation map and the screw holes of the foot are set aside for pouring. To find the main body level of the testing machine, the level can be located on the outer circle of the cylinder according to the vertical and horizontal position of the seat and the horizontal direction. The level can be found by the level meter with accuracy of 0.10/1000mm (+1 grid). When uneven, it can be adjusted by adding a pad iron under the base. What is a hydraulic transmission system? High quality medium viscosity mineral oil should be used in hydraulic transmission. Oil should not contain water, acid and other mixtures. It should not be decomposed or thickened at ordinary temperature. The oil must be filtered before it is poured into the machine. Due to the improper use of oil, the valve and oil pipeline will be blocked and the machine may produce vibration, which will affect the normal operation of the test machine. Reference Specification of Oil: Specificity: 0.86-0.97 Solidification Point: -15 to-20 C. Domestic No. 30-50 Oil can also be used according to actual conditions.
如何操作：開始使用試驗機之前，必須將從油箱到油泵管路中間裝設的活栓打開， 活栓的刻線與管子成一直線時，表示油箱與油泵之間的油路暢通，如刻線與管子 成正交時，則表示關閉。 放油時打開測力計左側底部之油嘴即可，關于油的使用期限根據各地氣候而決定， 如發現油開始混穢不能用時應換新油，欲擦試油箱底部或東西掉入取出時先放凈油， 卸下測力計左下方的圓蓋即可，完后須上好。
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