The timing for ejecting an SD memory card is specified as below table according to the state of the [SD C.] LED of the Logging Unit for the Energy Measuring Unit.
Where an SD memory card is ejected while [SD C.] LED is lit, it may cause a damage on the data of the SD memory card or malfunction of the SD memory card.

[SD C.LED]	Communication state	State of the SD memory card
Lighting	Communicating	Do not eject the SD memory card.  It wil communicate at next timing when:  1. Inserting the SD memory card whilie operating;  2. Turing power on while the SD memory card is inserted;  3. Every hour on the hour while SD memory card is inserted.
Light out	Communication stop	Ejectable.
High-speed  blink*	SD memory card error  （Communication stop）	Ejectable.  Errors in the SD memory card.  Confirm contents of the error.

* Repeat lighting for 0.25 sec and lighting out for 0.25 sec.