Metrohm 746 VA Trace Analyzer - Manual (Page 415)

5.7 Program instructions
746 VA Trace Analyzer / 747 VA Stand
5-264
PURGE Page: O, S Stand: M, A Abbreviation: PU
Instructions t/s Main parameters Auxiliary parameters
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## .. PURGE .....
Function Switch on purging.
Description The PURGE instruction switches on the inert gas purging for the
measuring vessel on the 747 VA Stand. This is used to remove the
electrochemically active and hence interfering oxygen in aqueous
solutions. With the inert gas flow rate of ca. 20 L/h set on the 747 VA
Stand, a purging time of ca. 3...5 min usually suffices.
Purging remains active until it is switched off automatically with the
ØPURGE or END instruction in the main program on the "OP.SEQUENCE"
page.
Comment • If the purging should be switched off automatically after a definite
time, the
TPURGE instruction can also be used.
• To achieve an effective purging of the analysis solution as quickly as
possible, the solution should also be stirred with the
STIR or TSTIR
instruction.
see also ØPURGE, TPURGE, STIR, TSTIR, END