- 12 -
Gas Alarms
When the gas concentration exceeds the gas alarm set value, the
corresponding gas concentration will start flashing, the unit will start
beeping, alarm lights will start flashing, AL1 and/or AL2 icons will
appear on the LCD, the backlight will turn on, and the detector will
start vibrate intermittently.
When the gas concentration falls below the gas alarm set value,
the gas alarm will automatically deactivate (automatic reset).
Alarm output
1
st
stage alarm 2
nd
stage alarm
Over-range
alarm
TWA alarm
STEL alarm
Gas t
yp
e
Combustible gas
10%LEL
30%LEL
111%LEL
-
-
Oxygen
19.5vol%
18.0vol%
50.1vol%
-
-
Hydrogen sulfide
10.0ppm
15.0ppm
150.1ppm
10.0ppm
15.0ppm
Carbon monoxide
50ppm
150ppm
2001ppm
25ppm
300ppm
Audio alarm
Slow beeping
Rapid beeping
Rapid beeping
Slow beeping
Slow beeping
Alarm lights (5places)
in 3 directions
Flash in
sequence in 3
different
directions, at
1.5 sec
intervals
Flash in
sequence in 3
different
directions, at
0.8 sec
intervals
Flash in
sequence in 3
different
directions, at
0.8 sec
intervals
Flash in
sequence in 3
different
directions, at
1.5 sec
intervals
Flash in
sequence in 3
different
directions, at
1.5 sec
intervals
Icons on LCD
AL1
appears for
corresponding
gas
AL1 and AL2
appear for
corresponding
gas
OL
flashes for
corresponding
gas
[Txx]
flashes in the
bottom right
corner (see
next page for
sample)
[Sxx]
flashes in the
bottom right
corner (see
next page for
sample)
Vibration
Vibrates at 2.5
sec intervals
Vibrates at 2.5
sec intervals
Vibrates at 2.5
sec intervals
Vibrates at 2.5
sec intervals
Vibrates at 2.5
sec intervals
Press the [ AIR ADJ.] button to silence the beeping
during an active alarm. However, if a new alarm arises,
the unit will start beeping.
NOTE
▲
1
st
stage alarm for
combustible gas
(Example)
2
nd
stage alarm for
combustible gas
(Example)
- 11 -
3. Power off
Press and hold the [ POWER] button until the LCD turns off.
--> After the unit beeps once, “OFF” will be displayed, then a countdown will start from;
“3”, “2” and “1” being displayed in sequence. After the unit beeps 3 times, the LCD
will turn off then the unit will turn off.
Gas Concentrations Screen
This detector can simultaneously display up to four gas concentrations on its LCD.
Most diagrams used in this manual use a typical 4-gas model as a sample. For 2-gas or
3-gas models, the gas names and concentrations of the corresponding target gases are
displayed on the LCD.
When a target gas concentration exceeds the service
range (page 39 "Specifications"), "OL" will flash on the
display instead of the concentration value.
If gas detection becomes impossible due to a sensor
failure, etc., the error message “E-S” will be displayed for
the corresponding gas. (page 27 “Error Messages”)
MENU
See the table on page 12 for details on
the “OL” indication.
NOTE
4-gas model (Example)
Combustible
gas
Oxygen
Carbon
monoxide
Hydrogen
sulfide
<Gas concentrations>
<Power off>
2-gas model (Example)
3-gas model (Example)
Service range of combustible
gas sensor exceeded
(Example)
Flashing
Flashing
Sensor failure for
combustible gas
(Example)