[Kimura and Yasui]

 We are in the process of installing data loggers to monitor He compressor temperatures.
The data loggers have been installed in the X-end and Y-end machine rooms.
The temperatures to be monitored are the inlet and outlet temperatures of the He gas heat exchanger and the inlet and outlet temperatures of the circulating oil for cooling. The temperature is monitored by four He compressors: two for duct shield cryo-coolers and two for radiation shield in cryostat. 
The temperatures are monitored by a dedicated PC, which will be connected to KAGRA's EPICS in the future.
 A data logger for the He compressors in the central machine room is also planned.