Olympus IR-500 Reference Manual page 28

Names of parts
About the memory gauge
The memory gauge is lit while the still image is being stored onto the card. The indication of the
memory gauge changes as follows according to the shooting conditions. When the memory
gauge is fully lit, wait until the gauge goes off before you resume shooting.
Shoot
Shot recorded
Before shooting
(Off)
28
Shoot
Shot recorded
1st shot
(Lights)
Memory gauge
Shoot
Shot recorded
Cannot shoot
(Fully lit)
Wait until the gauge
goes off before you
resume shooting.