| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems of the occurrence of a recording start output, recording of unnecessary data, and troublesome analysis work caused by malfunctioning of an analog input circuit and an operation part generated by using a clamp type current transformer, when a recorder for collecting data of a power system, especially a portable one, is used. SOLUTION: An always-monitoring means for always monitoring inputted data and a data recording lock means are provided, and unusual monitoring of the analog input circuit and the operation part is detected by the always- monitoring means. When unusual monitoring occurs, recording of data is locked by the data recording lock means, and the unusualness is displayed in an unusualness display portion. |
