Sper Scientific 850069 Environmental Quality Meter w/Sound - Manual (Page 25)

- 25 -
TROUBLESHOOTING
No Display:
 Ensure that you have pressed POWER
for longer than 100mS.
 Ensure that the batteries are in good
condition, have proper contact, and are
in correct polarity. When in doubt,
replace the batteries. (Refer to Battery
Replacement page 24.)
Display Disappeared:
 If the low battery indicator appeared on
the LCD before the display
disappeared, replace the batteries.
(Refer to Battery Replacement page
24).
 Disable the Auto-Off function and place
the unit in Record Mode. (Refer to
Record Mode and Auto-Off Selection
page 20).