| 摘要 |
PURPOSE: To attain optional setting of execution time for call measurement, real time processing of measured call number and. reduction of number of personnel for the measurement remarkably by separating two kinds of information set sent depending on the direction of currents of the information reaching the measured location and displaying number of times of arrival of them digitally. CONSTITUTION:An adaptor 3 is connected to a measured device 2, either of relay contacts is operated by relay windings A, B to change the direction of current flowing to a transmission line 4, two kinds of information are sent through the transmission line 4 to apply information to a call number measuring device 5 installed at the measured location. A call number measuring device 5 switches a measuring circuit section A or B depending on the current direction of the transmission line and is measured by a corresponding counter circuit (MET). Two kinds of information are transferred to one transmission line through a simple adaptor, then the number of times of operation of the device at a remote location is measured.
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