... display screen shows value increase 1,the value will jump to lower limit when increased to upper limit ... display screen shows value decrease 1, the value will jump to upper limit when decrease to lower limit ... bulletin of decision digital tube changed once, it will circulate with dXX, q_X, h_X three types. ... to carry on braze welding, relax the button will stop braze welding immediately.g) Stand-by state, ...