Planmeca Sovereign Classic, Руководство пользователя

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3. Check that the meter indicates within 3 bars above or below 1.
The meter may jump when the tester is inserted. If it does, wait for about
one second until the meter stabilises and then check the reading.
If the reading is 4 or more bars away from 1, the unit will not make an
accurate measurement. Contact your Planmeca dealer.
1 3 bars above 1
2 3 bars below 1
24.4 Turbine
The turbines supplied by Planmeca have a built-in backflow prevention
system, which protects the water used in the instrument from contamination.
CAUTION
A power cut will shut down the software-controlled backflow prevention
system. If you are using a turbine without a built-in backflow prevention
system, contaminated water can enter into the turbine and turbine hose in
the event of a power cut.
24 Operating instruments
User's manual Planmeca Sovereign Classic 159