Omron Hj 720ITC Advanced Pocket Pedometer "ear thermometer instructions" Questions

Need an instruction manual for Omron ear thermometer MC-505 http://personalcare.manualsonline.com/manuals/mfg/omron_healthcare/mc505.html

...ear thermometer mc-510 and when i press the on button it keeps flashing AA can you tell me why AA is displayed when there is a sudden ambient temp change. Leave the mc-510 out of its case in the room ...