Metrohm 797 VA Computrace - Manual (Page 216)

7 Manual control
797 VA Computrace – Software
204
Purge time (s) [ 0...80600 s ; 300 s ]
Time of inert gas purging before the first measurement of the
sample solution.
Conditioning cycles
Electrochemical regeneration of the solid state electrode by a
freely selectable number of conditioning cycles. For every cy-
cle, the voltage is changed at a sweep rate of 1 V/s to the
End
potential and then decreased at the same rate back to the
Start potential .
Start potential (V) [ -5...+5 V ; -1.2 V ]
Start voltage for the cyclic conditioning sweep.
End potential (V) [ -5...+5 V ; -0.1 V ]
Final voltage for the cyclic conditioning sweep.
No. of cycles [ 0...X ; 0 ]
Number of conditioning cycles.
Cleaning potential (V) [ -5...+5 V ; -0.8 V ]
Voltage applied to the electrodes during the Cleaning time .
Cleaning time (s) [ 0...80600 s ; 10 s ]
Time during which the Cleaning potential is applied to the
electrodes.
Sweep
Parameters of DP sweep used at the end of the cleaning cyc-
les for checking the electrode (see VA measurement modes,
section 3.2).
No. of repetition cycles [ 0...X ; 5 ]
Number of repetition cycles for applying the conditioning cyc-
les and cleaning potential steps.
Cell off after measurement [ on, off ; on ]
Enable/disable the switching off of the voltage applied to the
electrodes after measurement.
Stand-by potential (V) [ -5...+5 V ; -0.1 V ]
Voltage to be applied to the electrodes after measurement if
the
Cell off after measurement box is set to off .