Heath Consultants Personal Surveyor (PS200 Series) - Manual (Page 35)

2-11
OPERATION
A faulty LEL sensor zero reading is shown in Fig 2-14:
Fig. 2-14 Acknowledge Alarm
A configurable option is available to force the user to switch
the instrument off if a zero fault is detected, as shown in Fig.
2-15:
Fig. 2-15 Switch OFF
Note: If a sensor fault is detected during normal operation of
the instrument, the backlight illuminates red, an audible / visual
alarm is activated immediately and a spanner symbol is shown
adjacent to the faulty sensor type in the display.