38K249 Issue No. 4Using SetupRS232Select RS232 from the SETTINGS Menu and proceed as follows.Note: Use of the RS232 communications interface is only permitted in a SAFE area.The settings shown above are the default settings.PowerdownSelect Powerdown from the SETUP menu and proceed as follows.If TIMER mode is selected, following a period of inactivity, the instrument willautomatically power off after the preset TIMER period.If OFF is selected, auto power off is inhibited and once switched on, the instrumentwill remain ON until it is manually switched OFF.CalibrationCalibration routines are password protected. Refer to Calibration Section, Page 40for details of use.