Heath Consultants GT Series - Manual (Page 30)

3-8
USER HANDBOOK
If overdue but within the ‘extended period’, the
screen, shown in Fig. 3.11, is displayed.
Fig. 3.11 Calibration Overdue
The user must acknowledge that Calibration has
expired.
Note:
The extended period can be set from 1 to
31 days
To accept ‘extended period’ option:
• Press and hold YES and the instrument warm-
up continues.
Note:
When the extended period option expires,
the user will be forced to switch the
instrument OFF.
To reject ‘extended period’ option:
• Press and hold NO . The screen, shown in
Fig. 3.12, is displayed.