Heath Consultants GT Series - Manual (Page 117)

11-13
ALARMS
11.6 FAULT ALARMS
Refer to Alarms Table 11.1 to identify the audible / visual
indication for any of the following faults.
11.6.1 Low Battery
The battery symbol
is displayed on the screen
intermittently with LO . When the instrument’s battery
power is low, i.e. approximately 30 minutes operating
time remaining, the audible alarm sounds once every two
seconds and the Orange LED flashes. Recharge the
battery or replace the alkaline batteries if using alkaline
batteries.
The Low Battery flag
flashes when approximately
three (3) minutes operating time remains. The audible alarm
sounds once every second and the Orange LED illuminates
constantly. After three (3) minutes the instrument
automatically switches off.
Note: Both audible and visual gas alarms continue to
operate after the low battery warning message
appears.
11.6.2 Zero Fault
A “ZERO FAULT” flag and a flashing spanner symbol
appear after warm-up and after entering a mode if the
instrument is switched on in the presence of gas or the
instrument has been unable to zero all sensors correctly.
The audible alarm sounds, and the orange fault LED
flashes. If the user is in a mode where the faulty sensor
is used the orange LED is on, continuously.
It is strongly recommended the instrument is returned to a
gas free area. Switch the instrument off and then switch
on again in clean air. If the fault persists, return the
instrument for service.