166. Operation6.7. Restoring factory settings2 s@25ºCμS/cmºCECTt6.9. Changing temperature unitsThe instrument is shipped ready to measure temperature and express the values in °C.Follow the diagram to change the units to °F.6.8. Disabling auto power offif the measuring instrument is not used for 5 minutes, it shuts off automa-tically. This automatic power off feature can be disabled.2 setc.Automatic poweroff is disabledStable measurement@25ºCμS/cmºCECTt@25ºCμS/cmECTtºFThe current calibration can be erased and restored to the factorysettings.(1)(1) Press the keys simultaneously.sensION+ EC5 HACH 0710.indd ANG:16sensION+ EC5 HACH 0710.indd ANG:16 7/9/10 12:51:027/9/10 12:51:02