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4. Communication failure (1)This message appears when a sequence is started and there is a communicationproblem between the potentiostat and the computer. The following three points canbe checked independently:· Check the power supply circuit of the potentiostat (mains socket, mains cable,fuse and On/Off switch). Replacement of the fuses is described in Section 5,paragraph “Maintenance”.· Check that the mains voltage selection switch on the rear panel of thepotentiostat is set to the position corresponding to the mains voltage: too lowor too high voltages are equally harmful. Please refer to Section 3 “Gettingstarted” if necessary.· Check the RS232 serial connection between the potentiostat (RS232 socketRS232C1 2(1) for a PGZ or a PST) and the serial port of thecomputer (check the connection and the connecting cable). We recommendyou to use the C501X RADIOMETER ANALYTICAL cable, Part no. A95X501.Select the “Settings – Instrument setup” command of VoltaMaster 4 then checkthat the communication port of the PC used for the potentiostat connectioncorresponds to the option (COM1 to COM8) entered for the “Serial port”.. Using a PGP201, check that there is no battery problem. A “Replace battery”or “Reverse battery” message may be displayed on the PGP201. Please referto Section 5.2.5 “The PGP201 Potentiostat/Galvanostat - Troubleshooting” ifnecessary.1202305. Communication failure (2)This message indicates that the communication has been interrupted between thepotentiostat and the computer.1. Check the power supply circuit of the potentiostat (mains socket, mains cable,fuse and On/Off switch). Replacement of the fuses is described inSection 5, paragraph 5.1.6 (PGZ or PST) or 5.2.6 (PGP201).2. Check the RS232 serial connection between the potentiostat (RS232 socketRS232C1 2(1) for a PGZ or a PST) and the serial port of thecomputer (check the connection and the connecting cable).VoltaMaster 4 - Version 7.0x 91Section 4, Chapter 8: Error messages