Owner manual

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.