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3 - 3. Functions in Normal Operation
The detailed function descriptions in the normal operation are as below.
“Normal Operation” is the enable condition after the power in ON and the display is
<Gas Concentration Display>.
3-3-1. AIR Adjustment (ZERO Adjustment)
In normal operation, press and hold the [ AIR ADJ.] button for 3 seconds.
--> A beep will sound three times and [ADJ] will be displayed on the detectable gas
concentration display for 3 seconds. When the AIR Adjustment (ZERO adjustment) is
completed, [21.0vol%], [0%LEL] and [0ppm] will be displayed.
3-3-2. Peak Hold Function
1) In normal operation, press both [ POWER] and [ AIR ADJ.] buttons at the
same time.
--> A beep will sound once, PEAK will be displayed in the bottom of the LCD, and it
starts updating the current peak value (maximum value; minimum value for
oxygen).
2) To cancel the Peak Hold Function, press both [ POWER] and [ AIR ADJ.]
buttons at the same time again.
--> A beep will sound once, PEAK will be off, the peak value will be reset, and it will
revert to the normal <Gas Concentration Display> (instantaneous value).
Make sure to perform AIR Adjustment (ZERO Adjustment) in the
clean air. The erroneous gas concentration will be displayed in
gas atmosphere.
(Completed)
(Oxygen is 21.2%)
(AIR Adjustment)
For the gas, which the AIR Adjustment cannot be performed, the concentration
will be displayed instead of [ADJ].
NOTE
In "Functions in Normal Operation", the Multi-Gas Detector detects even if the
gas concentration is not displayed, and the gas alarm will be activated when it
exceeds the alarm set value.
NOTE
MENU
MENU
•
The peak hold function will be canceled if the power is turned OFF.
•
When the peak hold function is on, it will keep updating the current peak
value even if the concentration is decreased.
NOTE
WARNING
▲
▲
▲
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•
TWA Alarm
Hydrogen sulfide (H2S) and carbon monoxide (CO) concentrations will be integrated
every minute while the power is ON. The alarm will be activated when the integrated
value exceeds the alarm set value (see “
Specifications
” on page 37), and the indication
will be blinking in the bottom right corner of the LCD as below.
[(Integrated) Value]
Hydrogen Sulfide: 10 ppm x 8 hours x 60 times (60 times/hour) = 4,800 ppm
Carbon Monoxide: 25 ppm x 8 hours x 60 times (60 times/hour) = 12,000ppm
•
STEL Alarm
When a 15-minute TWA exposure for hydrogen sulfide (H2S) and carbon monoxide
(CO) exceeds the alarm set value, the alarm will be activated and the indication will be
blinking in the bottom right corner of the LCD as below.
DANGER
Blinking
(for CO)
Blinking
(for CO and H2S)
Blinking
(for H2S)
Blinking
(for H2S)
(for CO)
(for CO and H2S)
Blinking
Blinking
TWA alarm will not be reset until the power is turned OFF.
NOTE
STEL alarm will not be reset until it falls below the average or
the power is turned OFF.
NOTE
When the gas alarm is sounded, take all necessary precautions
immediately to avoid explosion.