3. The reading doesn't change when connecting a DC
current signal:
(1) Check if the test lead is correctly connected to the
current jack or LO jack.
(2) Check if the fuse in the current location on the back
panel has blown.
(3) Check if the measure location has switched to the DCI or
ACI place correctly.
(4) Check if the input is DCI but the measure location is in
ACI place.
4. USB storage can't be recognized:
(1) Check if the USB can work normally.
(2) Make sure that the USB storage being used is of flash
type, the instrument does not support USB of hardware
type.
(3) Make sure that the capacity of the USB storage is not too
large. It is suggested that the capacity of the USB
matches to the multimeter is no larger than 4 G.
(4) Restart the instrument and then insert the USB to check
it.
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