RKI Instruments GX-86 User Manual
Page 12
8 • Operation
Model GX-86 Instruction Manual
Safety Self-Check
The GX-86 continuously monitors itself for proper operation. If a malfunction occurs, a
single steady “trouble” tone sounds, and one of the following messages display.
Emergency Operation
The GX-86 can operate temporarily with up to three failed sensors. If a sensor(s) fails or is
absent at start-up, the GX-86 sounds a seven-tone alert, displays
FAIL HC O2 HS CO
(any
combination of up to three) then adjusts to operate on the remaining sensor(s). The GX-86
displays
XX
for the defective sensor(s) and normal readings for the active sensors. The
GX-86 performs normal monitoring functions for the active sensors for 13 minutes, when
it performs a self-diagnosis, then shows a malfunction alarm. To continue using the
GX-86, press the OFF button then restart.
If a sensor fails during operation, the GX-86 shows a malfunction alarm. To continue
monitoring with the remaining active sensors, press the OFF button, and restart as
described above.
Table 4: GX-86 Error Messages
Display
Description
FAIL (CH4 O2 HS CO)
Indicates sensor failure of one or more sensors
(the failed sensor is displayed) before start up.
Element Trouble
Indicates combustibles sensor failure after
start up.
00 OVER 00.0
Indicates O
2
concentration in excess of 40.0% or
an O
2
sensor failure after start up.
WARNING: High oxygen concentration
increases the risk of fire hazard.
LOW BATT
Indicates the battery voltage is too low to run the
GX-86. See “Displaying battery voltage” on
page 6.