Accu-Chek performa Owner's Booklet page 68

The temperature is
above or below the
proper range for the
meter. Refer to the test
strip package insert
for system operating
conditions. Move to an
area with the appropriate conditions, wait
five minutes, and repeat the test. Do not
artificially heat or cool the meter.
66
Note:
• I f you see any other error screen, please call Roche.
The battery is almost out
of power. Change the
battery now.
The time and date settings
may be incorrect. Make
sure the time and date
are correct and adjust, if
necessary.