首页>
外国专利>
Pulse transmitter, the number of whose pulses can be predetermined, for testing measurement and monitoring equipment which transmit pulses
Pulse transmitter, the number of whose pulses can be predetermined, for testing measurement and monitoring equipment which transmit pulses
展开▼
机译:脉冲发送器,其脉冲数可以预先确定,用于测试发送脉冲的测量和监视设备
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention relates to a pulse transmitter, whose number of pulses can be predetermined, for testing measurement and monitoring equipment which transmit pulses, especially measurement and monitoring equipment having a NAMUR (German Metrology and Control Technology Standards Committee) amplifier, having an oscillating crystal as a pulse generator whose high oscillation frequency is divided down, by means of a frequency divider, to a frequency of a few Hertz. The output pulses from the frequency divider are passed to a switching element, which is preferably a flipflop in a master-slave circuit, the output of the switching element being applied simultaneously to a pulse counter, which can be preset, and to the excitation coil of a relay. On reaching the predetermined number of pulses, the pulse counter switches the pulse generator off. The switching contact of the relay acts with the number of pulses in a floating manner on an output contact to which (and at the same time to the switching contact of the relay) the voltage inputs and outputs of the equipment to be tested are connected. The voltage of this equipment is now chopped in time with the pulses from the relay. IMAGE
展开▼