
DL9120 / DL9130
Operating Instructions
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8 Maintenance
Before opening the DL9120 / DL9130EV ensure that it is
disconnected from all voltage! Electric shock danger!
8.1 Preparing to work on the DL9120 / DL9130EV.
Make the DL9120 / DL9130EV is voltage free as follows, before opening
the instrument;
Power the unit off using the rotary switch by selecting the Off position on
the rotary switch.
Disconnect all of the test leads from the unit
8.2 Securing the DL9120 / DL9130EV
Under certain conditions safe operation of the DL9120 / DL9130EV can
no longer be assumed:
Visible damage of the instrument case.
Incorrect measurement results.
Recognisable abuse to the instrument due to prolonged storage under
improper conditions.
Recognisable abuse to the instrument due to extraordinary transportation
stress.
Check the battery compartment for signs of battery electrolyte leakage.
In these cases, the DL9120 / DL9130EV should be immediately switched
off, disconnected from any test or measurement function and secured to
prevent any further use.
8.3 Cleaning
Clean the external case of the DL9130EV with a clean dry cloth.
Avoid using solvents and abrasive scouring agents to clean the external
case of the DL9120 / DL9130EV.
Check the battery contacts and compartment are free of electrolytic
contamination.