When b blinks, five icons are displayed.
Press the five keys in any order. Each time you press a key an icon disappears from the
screen, continue to press the other keys until all the icons have disappeared.
When the self-diagnosis has been completed successfully,
diagnosis fails, error message Err appears.
Note: You have to finish pressing all five keys within 2 minutes, otherwise Err appears and you
will have to repeat the procedure.
5.5
Recover factory settings
When the meter is off, press and hold button-Read & button-Cal & button-Exit together for 3
seconds, the screen displays
Press button-Read to reset factory settings (MTC, slope and offset, etc.), display
then restart the meter.
Or press button-Exit to quit the setting, display
and blinks, means "Reset". Then we have 2 choice:
12
appears, means "pass". If self-
then turn off the meter.