Specifications

Chapter 6 Troubleshooting & Maintenance RIGOL
Service Guide for DM3058
6-5
CAUTION
Make sure the power is cut off before replacing fuse, and the specifications
of fuse should be in accordance with the requirements in this manual.
2. When the reading of small capacitance is not stable or the offset is a
little bigger:
(1) Shielded cable must be used to connect the capacitance while measuring
small capacitance so as to reduce the influence to result from exterior
interference.
(2) Cut off the capacitance under measure, clear Zero offset by „”REL” operation.
3. When the excursion occurs in the level of μV during measuring voltage:
(1) Warm up the meter according to the regulation.
(2) Measure signal by Manual range.
(3) Use pure copper cable to reduce thermoemf, after connecting, do not read
until warm up.
4. When the reading is stable and is not “0” while HI-LP terminal is short
in Voltage measure mode:
(1) Disable all the math operations.
(2) Disable calibration, for the operations please refer to “Calibration
Instructions”.
(3) Check whether the power supply of meter is normal or not.
(4) Check whether warm up the meter upon request.
5. When the backlight of screen is dark:
(1) Regulate the brightness and contrast of backlight.
(2) Refer to "Display
6. When fail to connect with the meter via RS-232 interface:
(1) Check whether the serial settings of both serial cable and host computer are
the same, please refer to “Interface settings” in User‟s Guide.
(2) Check whether the serial cable is still connected.
(3) Check whether both RXD and TXD terminal of serial cable are connected
correctly.
(4) Check whether the “Print” function is closed while using command to control
the meter.
7. When fail to connect with the meter via GPIB interface:
(1) Check whether the address of GPIB interface is correct; please refer to
Interface Setting in User‟s Guide.
(2) Check whether the GPIB cable is still connected.
(3) Ensure that whether the edition of software is match with the edition of
current firmware.
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