2
Sym
bol
Mean
ing
Descr
iption
O2 Concentration
ppm (Parts Per
Million)
ambient O2 concentration
Alarm
alarm icon
DIAG
Diagnose
Test communications between the SEU and RDU
AL1
(Depletion)
O2
The relay 1 will be triggered when O2 concentration is lower than
AL1. The Red 1 LED and Fault LEDs will flash, buzzer will sound
and relay1 will be activated. If strobe is connected, the strobe will
flash and this status will be latched.
AL2
(Depletion)
2nd O2 Alarm level
The relay 2 will be triggered when O2 concentration lower than
the second alarm level The Red1, Red 2 LEDs and Fault LEDs
will flash, and buzzer will sound. Relay1, relay2 will be activated.
If strobe is connected, the strobe will flash and this status will be
latched.
AL3
(Depletion)
3rd O2 Alarm level
When O2 concentration lower than the 3rd alarm level The Red1,
Red 2, Red3, and Fault LEDs will flash, and buzzer will sound.
Relay1, relay2, relay3 will be activated. If strobe is connected, the
strobe will flash and this status will be latched.
AL1
(Enrichment)
O2
The relay 1 will be triggered when O2 concentration higher than
AL1. The Red 1 LED and Fault LEDs will flash, buzzer will sound
and relay1 will be activated. If strobe is connected, the strobe will
flash and this status will be latched.
AL2
(Enrichment)
2nd O2 Alarm level
The relay 2 will be triggered when O2 concentration higher than
the second alarm level. The Red1, Red 2 LEDs and Fault LEDs
will flash, buzzer will sound and relay1, relay2 will be activated. If
strobe is connected, the strobe will flash and this status will be
latched.
AL3
(Enrichment)
3rd O2 Alarm level
When O2 concentration higher than the 3rd alarm level. The
Red1, Red 2, Red3, and Fault LEDs will flash, buzzer will sound
and relay1 ,relay2 , relay3 will be activated. If strobe is connected,
the strobe will flash and this status will be latched.
CALI
Calibration
To calibrate the O2 sensor when the accuracy deviates from the
actual O2 concentration.
RCFS
Recover Factory
Setting
To recover factory default settings and cancel any customized
settings.
Hi
High
The O2 concentration is above 25%
3. LCD Display Symbols
Fan Icon
Running if buzzer beeps
