Heath Consultants GT Series - Manual (Page 71)

6-7
BARHOLE TESTING MODE
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:
Fig. 6.8 Purge
The minimum purge time is ten (10) seconds, therefore,
the ‘stop’ option is not displayed for the first 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 .
The first barhole screen is then displayed:
Fig. 6.9 Non Timed Mode of Operation