Heath Consultants GT Series - Manual (Page 39)

3-17
OPERATING PROCEDURE
3.7 SWITCH THE INSTRUMENT OFF OR RE-
ENTER THE MODE MENU
To initiate the shut down sequence:
• Press and hold both the LH and RH but-
tons simultaneously.
Fig. 3.25 Switch OFF
While both buttons are depressed, the instrument display
will step through previous menus, each displayed for
approximately two (2) seconds.
After this time, the OFF sequence countdown begins and
the user will have to keep the buttons pressed for a
further three (3) seconds to switch the instrument OFF.
The countdown sequence is shown in Fig. 3.26.
Note: In Confined Space Mode, to prevent inadvertently
switching instrument OFF or changing mode while