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200NM/500NM/1000NM/2000NM series Manual operation It can be used to connect with ball valves, butterfly valves and so on, with widely usage. Have floating(24V) and modulating signal(0-10V or 4-20mA) choices.Use and maintenance:The manual operation is banned during electrificationThis product has passed completely-test and checkout conducted by quality-test workers before ex-factory. In the process of installation\connection between product and valve, the valve maybe can't be wholly opened and closed because of valve's coupling problem etc, in this case, the readjusting is required, its process stated specifically as followings:1. Firstly, installation and connecting correctly the execution device and valve;2. Manually test-run:Unload electric cover and handle-axle rubber stopper, then inserting enclosed hexagonal handle into hexagonal hole and rotating it in clockwise direction, the valve's opening value would be reducedWhen valve at wholly-closed position, please observe whether the limit stroke switch in"close"direction works or not(it will produce crack sound when working), then rotate handle for semi-circle so as to check whether the mechanical stop touches regulation screw or not;Rotating handle in anticlockwise direction and the valve's opening value would increase, then like the operation above stated, operator should check the limit stroke and mechanical stop. After manually test-run, operator should install the electric cover and rubber stopper;Electric test-run:Unload wiring cover and doing wiring correctly to circuit drawing on cover;Electrifying for test-run, operator should take notice of working circumstance of execution device and valve.