6-5
BARHOLE TESTING MODE
USER HANDBOOK
• Between Barhole tests there is a mandatory ‘Purge’ mode
to ensure that any gas in the instrument is cleared before
the next barhole is sampled.
6.3.2 Non Timed Mode
If NON TIMED is selected
or has been pre-selected
in configuration then the
instrument performs a purge,
as shown in Fig. 6.8:
• During purge, the peak
reading is reset to zero
and blanked from
display, as shown in
Fig. 6.7.
The minimum purge time is ten (10) seconds, therefore, the ‘stop’
option is not displayed for the rst ten (10) seconds.
Note: The timer starts at 0 and when 999 is reached, the timer
rolls over to 0.
Stop purge when the live readings reach zero:
To stop purge:
• Press and hold OK .
Fig. 6.8 Purge
Fig. 6.7 Purge Complete
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