- 10 -
2. Detection
When the <gas concentrations> screen is displayed, it means
that the detector is ready for use.
--> See page 7 “LCD Indication”.
--> See page 11 “Gas Concentrations Screen”.
--> See page 12 “Gas Alarms”.
During button operation, “press” means to press the button for less
than one second, and “press and hold” means to keep pressing the
button for more than 3 seconds.
NOTE
CAUTION
A significant change in work environment (e.g. temperature or
humidity change) may cause a zero drift (0%LEL, 0ppm or
21.0vol%). In this case, press and hold the [ AIR ADJ.]
button to perform air adjustment (zeroing) (page 14) in clean
air.
Flashing “0” or “0.0” for the gas
concentration value indicates that the
reading has fallen negative. This shows a
possibility that a high concentration gas
was detected or air adjustment was
performed in a gas atmosphere. To solve
this issue, perform air adjustment
(zeroing) (page 14) in clean air. If the
error message [E-S] is displayed (page
27), turn off the unit then turn it on in clean
air.
The vibrating alarm may be difficult to feel depending on the
location where it is worn.
▲
WARNING
Do not cover any gas detection ports with any fabric, etc. If
blocked, correct detection is not possible.
Keep the filter elements at the gas detection ports clean and
dry. If the filter elements are dirty or wet, proper gas detection
is not possible.
When wearing the detector, adjust its orientation to protect the
gas detection ports from rain or splashing water.
If a reading exceeds the full scale value, move the detector to
clean air area immediately. If not moved to clean air and
continued to be used, improper gas detection will result, and it
may take time for the reading to return to the zero point.
Do not block the speaker opening. If blocked, the audible
alarm will become muffled.
<Gas concentrations>
Flashing
- 9 -
3-2. Operating Procedure
* This manual explains an operating procedure by using a typical 4-gas model (O
2
,
Methane, H
2
S and CO) as a sample.
1. Power on
-> Warm-up -> Gas concentrations screen
Press and hold the [ POWER] button until the <gas types> screen is displayed on
the LCD.
--> After the unit beeps once, all segments (all letters and icons) will be displayed on the
LCD, then “ON” will be displayed. A countdown will start from; “3”, “2” and “1” being
displayed in sequence along with a beep for each. When the unit gives off a long beep,
release the button. The <gas types>, <full scale values>, <1
st
stage alarm set values>,
<2
nd
stage alarm set values>, <TWA alarm set values>, <STEL alarm set values> and
<date/time/temperature> screens will be displayed in sequence. Air adjustment followed
by warm-up cycle will start. When the warm-up cycle is completed, the unit will beep 3
times and the <gas concentrations> screen will be displayed.
Air adjustment (zeroing) automatically starts when the detector is
turned on. Make sure to turn on the detector in clean air. Failure to
do so may cause incorrect air adjustment which will then lead to
inaccurate measurement being displayed.
Always perform routine check (page 35) before use.
WARNING
WARNING
Warm-up
Gas concentrations
screen
1.
Power on
2.
Detection
3.
Power off
STEPS
Warm-up cycle takes a maximum of 2 minutes.
Only the power off button function is enabled during warm-up cycle.
If an error message is displayed, see page 27 “Error Messages”.
NOTE
MENU
<All segments>
<Gas types>
<Full scale values><1
st
stage alarm set values><2
nd
stage alarm set values><TWA alarm set values> <STEL alarm set values>
<Date/time/temperature>
<Air adjustment> <Gas concentrations>
<For methane> <For isobutane>
<Gas
types >
screen
