SDM3055 Series Digital Multimeter User Manual
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Chapter 5 General Troubleshooting
The following is a list of the troubles that you may meet while using the Multimeter and their solutions.
Please handle as the corresponding steps when meeting these troubles. If you still can’t handle them,
please contact SIGLENT in time.
1. If the screen of the Multimeter is still dark with nothing displaying after pressing the power key:
1) Check if the power has been connected correctly.
2) Check if the main power switch on the back panel has been turned on already.
3) Check if the power fuse has blown. Replace it as desired if it has blown.
4) Restart the Multimeter after all above steps have been done.
5) If the instrument still can’t start up properly, please contact SIGLENT.
2. The reading doesn’t change when connecting an AC current signal:
1) Check if the test lead has been connected to the current jack or LO jack correctly.
2) Check if the fuse in the current location on the back panel has blown.
3) Check if the measuring location has switched to the DCI or ACI place correctly.
4) Check if the input is ACI but the measuring location is in DCI place.
3. The reading doesn’t change when connecting a DC current signal:
1) Check if the test lead has been connected to the current jack or LO jack correctly.
2) Check if the fuse in the current location on the back panel has blown.
3) Check if the measuring location has switched to the DCI or ACI place correctly.
4) Check if the input is DCI but the measuring location is in ACI place.
4. USB Disks can’t be recognized by the instrument.
1) Check if the USB disk can work properly.
2) Make sure the used USB disk is of Flash type. The instrument doesn’t support USB disks of
hard disk type.
3) Check if the capacity of the used USB disk is too large. The Multimeter is recommended not
to use USB disks which exceed 4GB.
4) After restarting the instrument, insert the USB disk again to inspect.
5) If you still can’t use the USB disk properly, please contact SIGLENT.
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