Metrohm 746 VA Trace Analyzer - Manual (Page 452)

5.7.3 Alphabetical instruction list
746 VA Trace Analyzer / 747 VA Stand
5-301
TPURGE Page: O, S Stand: M, A Abbreviation: T
Instructions t/s Main parameters Auxiliary parameters
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## .. TPURGE .....
Function Purging for a preset line time.
Parameter Range; Default value / Meaning
t/s 0.1...999.9 s; -
Purging time
The duration of purging is entered in the line time.
Description The TPURGE instruction switches on the inert gas purging for the
measuring vessel on the 747 VA Stand for the period preset in t/s .
Purging 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.
Comments • If the purging should not be switched off automatically after a definite
time, the
PURGE 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 instruction.
see also PURGE, ØPURGE, STIR, TSTIR