Operation Manual

OmegaGTPlus / BetaGTPlus Instrument description
10
Safety pre-tests
Before performing a measurement, the instrument performs a series of pre-tests to
ensure safety and to prevent any damage. These safety pre-tests check for:
• any external voltage against earth on test socket,
• excessively high leakage current,
• excessively high touch leakage current,
• Short circuit or too low resistance between L and N on appliance,
• Correctly applied mains voltage to the test socket.
If pre-tests fail, an appropriate warning message will be displayed.
The warnings and measures that have to be taken are described in chapter 2.2
Symbols and messages.
2.2 Symbols and messages
Mains voltage is not
correct or PE is not
connected.
Check mains voltage
and PE connection!
Improper supply voltage warning. Possible causes:
Ì No earth connection or other wiring problem on
supply socket.
Ì Incorrect mains voltage.
Determine and eliminate the problem before
proceeding!
L and N are crossed.
Press START key to
continue.
The instrument works normally also in the case when L
and N are interchanged. Check polarity of line and neutral
wires on test socket.
Warning!
Instrument is connected to
the IT earthing system or PE
not connected.
Press START key to
continue.
Supply voltage warning. Possible causes:
Ì no earth connection,
Ì instrument connected to IT earthing system.
Press the START key to continue if instrument is
connected to IT earthing system.