| 摘要 |
PURPOSE:To obtain a system enhanced in workability at the time of the collection of data and receiving no effect of noise, by respectively providing a means transmitting data by feeding the same by an infrared signal to a load survey meter and a load survey recorder. CONSTITUTION:The titled survey system is constituted of a load survey meter (SM) provided at every terminal and measuring data such as use quantity of electricity store the same in parts at every predetermined time and a load survey recorder (SR) collecting said data. A means transmitting the data by feeding the same by an infrared signal is respectively provided to SM and SR to perform the recovery of the data. At this time, the ID number of SM is inputted to SR at first to be converted to the infrared signal which is, in turn, propagated to SM as a data recovery start code. SM compares said code with set ID and, if both of them coincide, the ID number converted to the infrared signal and time data are propagated to SR. Hereinafter, the ID number is converted to the infrared signal in the same way to alternately propagate a data command code and the data of SM corresponding thereto. |
