Penlon AV-S, Service Manual, Page: 39 / 94

DESCRIPTION - O
2
Monitor
3.12.4 Display
High-set, low-set, and oxygen concentration
percentage readings are displayed on screen.
Touch the tab to activate O2 menu
Oxygen Concentration
The display provides a direct readout of
measured oxygen concentrations in the range
0-100%.
Low Alarm Set - limited within 18-99%
The oxygen percentage, set by the user, at
which the low alarm will be activated.
To set the low oxygen alarm, see section 5.3.4.
High Alarm Set - limited within 19-105%
The oxygen percentage, set by the user, which
the high alarm will be activated.
Note that in certain conditions of excess
pressure, the readout may show a value above
100%.
To set the high alarm, see section 5.3.4.
3.12.5 Display
HIGH O
2
ALARM
The high O2 alarm is triggered when the oxygen
concentration is 1% above the set value.
a) The High O
2
Alarm visual indicator will
illuminate.
b) A high priority audible alarm will sound.
To cancel this alarm, the high alarm setting must
be equal to, or above the oxygen concentration.
The alarm can be muted for 120 seconds.
LOW O
2
ALARM
The low alarm is triggered when the oxygen
concentration is 1% below the set value.
a) The Low O
2
Alarm visual indicator will
illuminate.
b) A high priority audible alarm will sound.
To cancel this alarm, the low alarm setting must
be equal to, or below the oxygen concentration.
The alarm can be muted for 120 seconds.
O
2
SENSOR FAULT
The alarm is triggered:
i) when either the oxygen sensor is
disconnected or approaching the end of its life.
ii) if the O
2
concentration exceeds 110%.
a) The message O2 SENSOR FAULT will be
displayed.
b) A high priority audible alarm will sound.
To cancel this alarm, check the sensor
connection or replace the sensor.
The alarm can be muted for 120 seconds.
O
2
SENSOR LOW
This alarm indicates the sensor has approached
the end of its life.
The legend O
2
SENSOR LOW will be displayed,
and a low priority alarm (single note) will sound.
The sensor must be replaced as the output will
fall very quickly to zero within two to three weeks
of normal usage.
See section 6.5 for sensor replacement.
3.12.6 Oxygen Monitor Alarm Mute
In an alarm condition, pressing the ALARM
MUTE button will deactivate the audible alarm,
but the alarm message display will remain on
screen.
The switch will illuminate, and a single note will
sound.
The alarm mute can not be operated:
a) Until the mute time is over, or the alarm
condition has been rectified.
b) When O
2
concentration drops below 18%.
Measured O
2
concentration
High Alarm Set
Value
Low Alarm Set
Value
33
%O
2
100
33
20
.
.
IO
o
o