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为了保证试验机示值的准确性,在试验之前,必须调整指针的零位。一般说来,转动推杆或调整平衡铊的位置均可使原来偏离零位的指针重新对准零位。但在采取这两种措施之前,必须首先保证测力摆杆处在垂直位置。否则,仅靠转动推杆或调整平衡铊应置所取得的指针零位是虚假的,因而负荷示值也是不准确的。实际上,指针对零就是测力摆杆处于垂直位置的
In order to ensure the accuracy of the test machine indication, before the test, you must adjust the pointer zero. Generally speaking, turning the push rod or adjusting the position of thallium balance can make the original pointer that deviates from zero re-align with zero. However, before taking either of these measures, you must first ensure that the force-measuring pendulum is in a vertical position. Otherwise, just by turning the push rod or adjust the balance of thallium should be set to obtain the zero point of the pointer is false, so the load indication is not accurate. In fact, the pointer to zero is the vertical force measuring pendulum position