GMI Shipsurveyor - Flammable and Oxygen Alarms; Flammable (LEL) Alarms; Oxygen (O2) Alarms

4-2
USER HANDBOOK
Alarm levels are set at the time of instrument manufacture.
It is important that the user ensures that the levels are in
accordance with their company’s alarm levels and with health
and safety legislation. The alarm levels are user congurable.
All gas ranges can have alarm limits that trigger the alarm if
the measured gas reading exceeds the set level. If a preset
alarm level is exceeded, the audible alarm sounds, the LED’s
ash, and the gas range name alternates with the alarm type.
Note: Alarms are disabled in Combustible Gas Indicator
(CGI) mode.
4.1.1 FLAMMABLE (LEL) ALARMS
Note: A congurable option allows the instrument to display
this range type as LFL (Lower Flammable Limit).
Two (2) instantaneous alarm levels (Hi and HiHi) are
congurable, each with different alarm indications, refer
to Fig. 4-1. Both are rising alarms, i.e. if the detected gas
concentration rises above the specic alarm level, the alarm
is triggered. All alarms are user congurable to meet the
needs of different companies.
4.1.2 OXYGEN (O
2
) ALARMS
Three (3) instantaneous alarm levels (HiHi, Lo and LoLo) are
congurable, each with different alarm indications, refer to
Fig. 4-1. These consist of one rising, and two falling alarms
(necessary to trigger alarms in oxygen decient scenarios).
All alarms are user congurable to meet the needs of different
companies.