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5.1.5 Troubleshooting1 The pilot lamp “ON” is not lit when the PGZ or PST is switched on. Check the power supply circuit (mains socket, mains cable, fuse and On/Offswitch). Replacement of the fuses is described in Chapter 5.1.6.. Check that the mains voltage selection switches on the rear panel of the PGZor PST is set to the position corresponding to the mains voltage: too low or toohigh voltages are equally harmful. Please refer to Section 3 “Getting Started”.2. Interruption by circuit break - current disjunctionThe PGZ or PST disconnects the working electrode (protection of theelectrochemical cell) and VoltaMaster 4 software displays the “CURRENTDISJUNCTION” error message which means that the experiment is stopped.Consult VoltaMaster 4 Help file, keyword index:Error messages (select Current disjunction).3. Thermic disjunctionThe PGZ or PST disconnects the working electrode, the “CELL” button lamp goesof and VoltaMaster 4 software displays the “THERMIC DISJUNCTION” errormessage which means that the experiment is stopped.Consult VoltaMaster 4 Help file, keyword index:Error messages (select Thermic disjunction).4. The potentiostat starts to oscillate continuouslyIn potentiostatic mode and for low current measurement ranges (< 100 µA), thePGZ or PST may start to oscillate with special electrochemical cells (cells with lowohmic drop and high double layer capacitance). This malfunction can be detectedby using an oscilloscope connected to the PGZ “I OUT” or “E OUT” BNC sockets onthe front panel.Operating instructionsActivate the anti-oscillation filter of the PGZ or PST: use the “Instrument - Othersettings” command of VoltaMaster 4.Consult also VoltaMaster 4 Help file, keyword index:Anti-oscillation filter.VoltaLab 21/06/10/40/50/80 123Section 5, Chapter 1: The PGZ and PST series