Heath Consultants GT Series - Manual (Page 27)

3-5
OPERATING PROCEDURE
2. Cal Due Date and overdue date messages are
displayed.
Calibration due date is displayed, as shown in Fig.
3.5.
Fig. 3.5 Calibration Due Date
The screen, shown in Fig. 3.6, is displayed when
the Calibration date has expired. i.e. overdue.
Fig. 3.6 Calibration Overdue
After approximately five (5) seconds, the
instrument warm-up continues.