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XA-4400
XA-4300H
XA-4300C
XA-4200KS
XA-4200KH
XA-4200KC
XA-4300H-n
XA-4300C-n

This instruction manual explains the use of eight models listed in the left.

• Keep this instruction manual available for quick reference when needed.
• Read this instruction manual and understand the information before using
the product.

Model

Target Gas

XA-4400

Combustible gas, H2S, CO, O2

XA-4300H

Combustible gas, H2S, O2

XA-4300C

Combustible gas, CO, O2

XA-4200KS

Combustible gas, O2

XA-4200KH

Combustible gas, H2S

XA-4200KC

Combustible gas, CO

XA-4300H-n

O2, H2S

XA-4300C-n

O2, CO

Document No.: XA-4400T

Table of Contents
Included in this Package .................................................................................. 1
1. Introduction ................................................................................................... 2
Explosion-Proof Requirements .................................................................... 2
Explanation of Symbols............................................................................... 3
Safe Operation ............................................................................................ 3
2. Product Layout and Functions .................................................................... 5
Installation Procedure of Belt Clip ............................................................... 7
3. Operating Procedure .................................................................................... 8
Operating Procedure ................................................................................... 8
How to Read Gas Concentration............................................................... 10
Auto Backlight and Setting ........................................................................ 10
Gas Alarm ................................................................................................. 11
TWA Alarm ................................................................................................ 12
STEL Alarm ............................................................................................... 12
Peak-hold Function ................................................................................... 13
Functions and Setting................................................................................ 14
Functions and Setting: Alarm Test ............................................................. 15
Functions and Setting: Logging ................................................................. 16
Functions and Setting: Alarm Level ........................................................... 21
Functions and Setting: Clock Adjustment .................................................. 22
Functions and Setting: O2 Alarm Mode...................................................... 23
Functions and Setting: Volume/Silent........................................................ 24
Functions and Setting: LCD Contrast ........................................................ 26
Functions and Setting: Display Setting...................................................... 27
Functions and Setting: Safety Lock ........................................................... 28
4. Notifications and Error Messages ............................................................. 31
5. Replacing Consumables ............................................................................ 32
Replacing filter element............................................................................. 32
Battery Replacement................................................................................. 33
6. Maintenance Check..................................................................................... 34
Daily Check ............................................................................................... 34
Periodic Check .......................................................................................... 35
Spare Parts................................................................................................ 35
7. Troubleshooting.......................................................................................... 36
8. Warranty....................................................................................................... 36
9. Specifications.............................................................................................. 37
10. Detection Principle.................................................................................... 38
11. Glossary..................................................................................................... 39

Included in this Package
The following items are enclosed in the package. Carefully check all items listed below
before use. Contact your New Cosmos representative if any items are broken or missing.
Multi-gas Detector

1Belt clip (with three screws)

1

Two spare filter elements

1

Size AA alkaline dry cell battery (LR6) made by PANASONIC

2

Inspection report1z Options (sold separately)
Name

Remarks
For inspection of the alarm function and indication
Calibration jig (EG-111) accuracy for combustible gas, H2S, CO and O2 gases
in daily inspection.
For inspection of the alarm function and indication
Inspection set for
accuracy for H2S gas in daily inspection.
hydrogen sulfide* Inspection requires calibration jig (EG-111) in addition(EG-112)to this set.
Data logging kit*
For collecting logged data to PC*PC is necessary to meet the following system requirements.
・OS: MS WindowsⓇ2000 or MS WindowsⓇ XP(Gas Detector operation has not been confirmed with other OS versions.)
・Hard disk: Free space of 6 MB or more
・CD-ROM drive: A CD-ROM drive capable of reading CD-R data
(The software is provided on a CD-R disc.)・USB port: A USB1.1 or higher grade port for Windows, which allows
connection to a connector type A.

-1-1. Introduction
Thank you for purchasing the Multi-gas Detector. Be sure to read this instruction
manual and use the product properly to prevent gas accidents and for inspection andmaintenance.
This Multi-gas Detector detects up to four types of gases, oxygen (O2), combustiblegas (COMB), hydrogen sulfide (H2S) and carbon monoxide (CO), and displays all gas
concentration values at the same time. The Multi-gas Detector also prevents accidents
from lack of oxygen, gas explosion, or gas poisoning.
Read and understand thoroughly this manual regardless of your experience withusing gas detector. Do not use this Multi-gas Detector for improper purposes. Do not
use the Multi-gas Detector in undocumented way in this manual.
WARNING Waterproof
Be sure to keep the gas sampling port dry. This Multi-gas Detector
employs a water proof structure which meets our tests* complying
with JIS C 0920-2003 Ingress Protection code IPX7 at brand-new
condition to prevent malfunctions due to water from unavoidable
circumstances in use. However, if the filter element is wet, the gas
cannot be detected properly. Since the age-related deterioration of
packing or label, or adhesion of foreign materials degrade theperformance of water proof structure, exposure to water should be
avoided as much as possible.
* Immerse the new Multi-gas Detector gently from the bottom into
the depth of 1m from the surface of standing tap water at room
temperature and verify that there is no damage from ingress ofwater after 30 minutes.

•

Explosion-Proof Requirements
Confirm the following explosion-proof requirements.
Explosion-proof structure: Ex iad II BT3 X (Japan)
Power rating: 3.0V DC (LR6 made by PANASONIC x 2)
Ambient temperature: -20 to 50 degrees C
Use conditions:・ Replace batteries in a safe place.
・ For comprehensive measures for preventing accidents due to electrostatic
charges, the user should desirably wear anti-static working clothes andconductive footwear (antistatic working shoes), and the floor should desirably bea conductive work floor (leak current: 10M ohm or less).
・ The cap may catch fire if it is impacted or rubbed. Do not drop, hit, or rub theequipment.

-2-

•

Explanation of Symbols
The following symbols are used for safety purposes:•

DANGER

Indicates a hazardous situation that may result in serious injury
or death, if not avoided.

WARNING

Indicates a potentially hazardous situation that may result inserious injury or death, if not avoided.

CAUTION

Indicates a potentially hazardous situation that may result inminor injury or physical damage, if not avoided.

NOTE

Indicates an operational advice.

Safe Operation
Be sure to observe the following to use the product safely and properly.
DANGER

If the gas alarm is activated, take all necessary precautions
immediately to prevent explosion or gas poisoning accidents.

WARNING • Be sure to turn ON the Multi-gas Detector in clean air. Since zeroadjustment starts automatically, the proper gas concentration will
not be displayed if turning on the Multi-gas Detector in gas
atmosphere.
• Do not close the sampling port or exhaust port. The gas cannot be
detected properly.
• Do not block the buzzer port or the alarm will be hard to hear.
• Use clean filter elements. If the filter element is dirty or wet, thegas cannot be detected properly.
• The sensor unit is guaranteed for one year from the date ofpurchase. It is highly recommended to replace a sensor after one
year for proper gas detection.

-3-

•

Safe Operation
Be sure to observe the following to use the product safely and properly.
CAUTION • Check the battery status, about once a month, even if theMulti-gas Detector remains unused for a long time. Replacebatteries as the leakage of electrode may occur when the battery
level is low.
• This is an explosion-proof multi-gas detector. To avoid damaging
the explosion-proof structure, never attempt to disassemble,
remodeling, modifying of structure or circuit, etc.
• Keep the Multi-gas Detector away from heat and humidity.
Otherwise, it may affect the performance.
• Do not store or use the Multi-gas Detector in places where thetemperature or humidity fluctuates greatly. Otherwise, it may
affect the performance.
• Keep the Multi-gas Detector away from significant changes inatmospheric pressure. Otherwise, it may affect the performanceof sensor.
• Avoid high mechanical impacts, dropping and throwing theMulti-gas Detector, Otherwise, it may affect the performance.
• In case of dew condensation, conduct an inspection after drying
the Multi-gas Detector completely before use.
• Use the Multi-gas Detector in suitable environment to avoid
detection of other interference gas or solvent vapor.
• Do not use the Multi-gas Detector in an atmosphere containing
silicone gas or silicone products to avoid affecting theperformance.
• Detecting high concentration of SO2 or CI2 may decrease thesensor life or increase errors.
• Using the Multi-gas Detector for long periods of time for detecting
H2S may decrease the sensor life and increase errors.
• Gas detection at places where the atmospheric pressure isdifferent from the standard, such as high altitude, will not detectcorrect concentration due to the pressure dependence of oxygen
sensor.
• The gas sensor contains harmful substances. When disposing of
the sensor, return to New Cosmos Electric or dispose as industrial
waste.
• The battery life will be shorter when using the Multi-gas Detector
at low temperature than using at normal temperature due to thebattery characteristics.
• Keep walkie-talkie away from the Multi-gas Detector while in use.
It may cause the indicator shakes or alarm errors due to radio
wave.

-4-

2. Product Layout and Functions
3

1

10

5

2

4

6
7

8

-5-

9

No.

Name

Function

1

Battery cover2

Alarm lamp

Flickers when a gas alarm is activated.

3

Buzzer port

Buzzer sounds.

LCD Display

Displays the gas concentration value andother messages.

4

Cover for the battery compartment.

OxygenCombustible
gas
HydrogenSulfideCarbonMonoxidedca. Remaining battery level:

High・・・・・・・・・・ Low

Replace（Flicker） (Flicker)bab. Temperature inside the Multi-gas
Detectorc. Timed. Year, month, and day

5

Infrared data communication

Used to collect log data.

6

POWER/MENU Switch (Set )Turns the power on and off.
Changes to the MENU screen.

7[AIR ADJ./▲ switch] (Select)
BZ.STOP

Adjusts the air.
Selects the menu.
Stops the alarm.

8

Gas detection port

Detects the gases.

9Belt clip

Clips to belt using three screws on back ofMulti-gas Detector.

10Brightness sensor

Detects the current lighting condition, andlights up LCD backlight automatically.

-6-

•

Installation Procedure of Belt Clip

Install the belt clip to wear the Multi-gas Detector on the belt.
Please follow the instructions below.
CAUTION ・ Use only the provided screws (M2.6 x 4, truss head) to attach thebelt clip.
・ Use the proper screwdriver to avoid damaging the screw head.
・ Tighten the screws firmly. When the screws are loosened, it may
cause the detector to fall from the belt clip.
・ Do not lift the edge of belt clip too high. It may cause the deformationof the belt clip.

1) Attach the belt clip to the back ofMulti-gas Detector with provided
three screws (M2.6 x 4, trusshead).

Provided 3 screws(M2.6 x 4, truss head))2) Hold both sides of the detector
and lift the edge of belt clip, towear or remove.

1. Hold both sides of thedetector tightly.

2. Lift the edge of belt clip
up to wear on or remove.

-7-

3. Operating Procedure•

Operating Procedure
WARNING

STEPS

Be sure to perform Maintenance Check (on page 34) before use.

1. Turn ON

Warmup

Displays <Gas
Concentration
screen>2. Detection

3. Turn OFF

1. Turn on the power → Warm-up → Displays <Gas Concentration screen>
WARNING • When using for the first time, when thebatteries has been removed for a long
period of time, or if “Delete Memory" isdisplayed, it is necessary to leave theMulti-gas Detector in clean air at
operating condition for approximately
10 minutes before use. Then press the[AIR ADJ./▲ switch] for approximately
two seconds to perform the air
adjustment.
• Be sure to turn ON the Multi-gas
Detector in clean air. Since zeroadjustment starts automatically, theproper gas concentration will not be
displayed if turning on the Multi-gas
Detector in gas atmosphere.

1)
2)
3)

<Delete Memory>[Delete memory]
Memory has been
deleted
Set the clock.
: Return

Press the POWER switch for approximately three seconds. The alarm lamp
will flicker once, and the buzzer will sound (pip). The power will be turnedon.
“Please wait a moment” message (warm-up) will be displayed for a
maximum of two minutes on LCD display.
The buzzer will sound (peep) within one minute, and <Gas Concentration
screen> will be displayed.

NOTE• When the error message is displayed on LCD, see on page 31.
• When <Delete Memory screen> is displayed, press the [POWER/MENU
switch] to return to <Gas Concentration screen> and adjust the clock (see on
page 22).
• “Delete Memory” will be displayed when it has not been used for several
days or after the batteries are replaced.

-8-

2. Detection<Gas Concentration Screen>

When <Gas Concentration screen> is displayed,
it is ready for detection.

••

See “How to Read the Gas
Concentration” on page 10.
See “Gas Alarms” on page 11.

OxygenCombustible
gas
HydrogenSulfideCarbonMonoxide

WARNING ・ When the indicator value is beyond Full Scale, leave theMulti-gas Detector in pure air, otherwise it may cause
performance deterioration.
・ Do not close the suction port or exhaust port, or no gas detection
will be possible
・ Do not block the buzzer port, or the alarm volume will be hard tohear.
・ Use clean filter elements. If the filter element is dirty or wet,gases will not be detected correctly.
・ Be sure to set the Multi-gas Detector in the correct direction to
avoid exposure to rain and water.
CAUTION The adjustment value may vary with changes in working environment,such as temperature, humidity. In that case, press and hold the [AIRADJ./▲ switch] to execute automatic air adjustment.

NOTE

Change the battery before fully discharged.
The data will remain about one week when the batteries run out.
The data will be deleted after 24 hours when the batteries are
removed. (It depends on the conditions and temperature.)

3. Turn off the power.
1)
2)

Press and hold the [POWER/MENU switch].
The buzzer (pip) will sound and start the countdown for power-off on the
LCD display. Release the switch when the countdown is 0, then the buzzer
will sound (Peep) and the power will turn off.

-9-

•

How to Read Gas Concentration
Four gas concentration values are displayed at the same time. Two different types ofdisplay are available. (See on page 27 for display setting).
However, the name and concentration of the corresponding gases will be displayedwhen the monitoring gas is two or three types. (The following explanatory diagrams
indicate the four types of the corresponding gases.)In the case of malfunction due to the sensor trouble, the names and concentration of
the corresponding gases will be displayed blank.

Standard Display

The names of the target gases and gas concentration values are displayed at
the same time.
OxygenCombustible
gas
HydrogenSulfideCarbonMonoxide

Four gas concentration values and bar graphs are displayed.
Four Split Screen<Magnified view of H2S>
Display range of bar graph
O2 : 0-25 vol%H2S: 0-30 ppm
COMB: 0-100 %LEL
CO2: 0-300 ppm
Alarm Level [L]Bar graph

Alarm Level [H]* If gas concentration value exceeds its full scale, “---,” will indicate.
* If the Multi-gas Detector is unable to detect gases for reasons including sensor
malfunction, only the display of the sensor will be blacked out.

•

Auto Backlight and Setting▪ Auto backlight

The brightness sensor detects the current lighting condition, and lights up LCD
backlight automatically.
▪ Backlight setting
LCD backlight can be set the timeout at a certain period of time. (See on page 27
for setting.)
Setting time

Description[ - - - ] minutes

Keep backlight on until its surrounding isbright enough.

Up to 10 min at 5 min intervals.

The backlight turns off after the elapse of
set time.

10 to 60 min at 10 min intervals
60 to 600 min at 30 min intervals- 10 -

▪ Condition of auto backlight after timeout

1) Turns on when it becomes dark again.
2) Turns on by tapping the switch in the dark place.
3) Turns on when it detects gas in the dark place.

•Gas Alarm
When the gas concentration reaches its alarm set value, the Multi-gas Detector activates
gas alarm. The following table is the alarm action.
When the gas concentration value falls below the alarm set value, the gas alarm
automatically turns off.
Press and hold the BZ.STOP switch to stop the buzzer and vibration. However, when it
detects further gas alarm, the buzzer will sound again.
NOTE

When the oxygen alarm mode is set to “High, Low” (see on page 23),ndthe buzzer and alarm lamp action will be the same as the 2 stage inthe table.

stnd
Example: Oxygen concentration display (1 stage: 19.5%, 2 stage: 18.0%)

LCD display

BuzzerAlarm lamp

Four Split
Screen

1st stage

Standard
Display

AL1 flickers

OxygenSoundscontinuously atlong intervals

AL1 flickers

Four Split
Screen

2nd stage

Standard
Display

Blinksalternately in thesame period ofbuzzer.

AL2 and value flicker

OxygenSoundscontinuously atvery shortintervals

AL2 and value flicker- 11 -•TWA Alarm
The Multi-gas Detector integrates the concentration of gas every minute frompower ON to OFF and activates the alarm when the integrated value exceeds thefollowing value. The TWA alarm will not go off until the power is turned OFF. Press
and hold the BZ. STOP switch to stop the buzzer and vibration.
Integrated value
H2S: 10 ppm x 8 hours x 60 times (60 times per 1 hour) = 4,800 ppm
CO: 25 ppm x 8 hours x 60 times (60 times per 1 hour) = 12,000 ppm
LCD display
Standard
Display
Four Split
Screen•BuzzerAlarm lamp

Sound
continuously atlong intervals

Blinks alternately
in the same
period of buzzer.

TWA flickers

HydrogenSulfideTWA flickers

STEL Alarm
The Multi-gas Detector activates the alarm when the average gas concentration per
minute in the past 15 minutes exceeds its set value. The STEL alarm will not go off
until either the average value drops below the set value or the power is turned OFF.
Press and hold the BZ. STOP switch to stop the buzzer and vibration.
LCD display
Standard
Display
Four Split
ScreenBuzzerAlarm lamp

Sound
continuously atlong intervals

Blinks alternately
in the same
period of buzzer.

STEL flickers

HydrogenSulfideSTEL flickers- 12 -

•

Peak-hold Function
The peak hold function displays the peak value of detected gas concentration after
setting. The highest concentration values of combustible gas (COMB), hydrogensulfide (H2S), and carbon monoxide (CO), and the lowest concentration value(default) of oxygen (O2) are kept and displayed.
PEAK will flicker in the date section of the<Gas Concentration screen>, and thepeak value is displayed.

Setting

Press both
[POWER/MENU switch]
and[AIR ADJ./▲ switch]at the same time.

Reset

Press both
[POWER/MENU switch]
and[AIR ADJ./▲ switch]at the same time.

NOTE<Gas Concentration screen>

OxygenCombustible
gas
HydrogenSulfideCarbonMonoxide

Back to the standard <Gas Concentration
screen> and the peak values will be reset.

The peak hold function setting will be reset when the power is turned
off.

- 13 -

•

Functions and Setting
Press the [POWER/MENU switch] for one
second to display <MENU screen>. From thisscreen, perform and configure each function.

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Item
Alarm test

Logging

SettingFunctions and settings
Operation test for alarm lamps and buzzer.
Adjust the volume of gas alarms.
The detection date, time, gas concentration and temperaturelevels are logged (recorded) in preset cycles.
The following operations are available:• Start logging• Stop logging• Delete logging data
• Set the logging cycle (Interval)

Reference
page
Page 15

Page 16
to 20

Alarm level *Change alarm levels

Page 21

Time (Clockadjustment)

Set time and date

Page 22

O2 mode set *Select a mode for oxygen (O2) gas
alarms and peak-hold function

Page 23

Gas adjustment *Conduct gas adjustment

Volume/Silent *Change buzzer sound volume andactivate silent mode

Page 24

LCD contrast

Adjust display contrast

Page 26

Display setting
Safety lock

Change display to Japanese, four split
screen, and backlight timeout setting
Lock *-marked functions at the left toprevent changes. It needs to disable
the safety lock to change functions.
Safety lock is a factory default setting.

- 14 --

Page 27

Page 28•Functions and Setting: Alarm Test
1)

2)

3)

Press the [POWER/MENU switch] for one
second to display <MENU screen>.
“Alarm test” is pre-selected. Press andhold the [POWER/MENU switch]<ALARM TEST screen>is displayed, thealarm lamp flickers, and the buzzer
sounds.
NOTE

4)

If the Multi-gas Detector is set on
silent mode, the message of “Cancel[SILENT MODE]?” is displayed.
If "Cancel" is selected, the Silent
mode will be canceled and alarm
test starts.

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<ALARM TEST screen>

Volume level
31[▲]:Adjust [MENU]:Return

Press the [AIR ADJ./▲ switch] to adjust
the buzzer volume. (Set range 0 to 31)
WARNING The change of buzzer volume
on this screen is also applied
to the gas alarms.

5)

Press and hold the [POWER/MENU switch] to stop the alarm test andreturn to <Gas Concentration screen>.

- 15 -

•

Functions and Setting: Logging
Change the batteries before fully discharged.
The data will remain about one week when the batteries run out.
The data will be deleted in 24 hours when the batteries are removed.*(* It depends on the conditions and temperature.)

NOTE

1)

Press the [POWER/MENU switch] forapproximately one second to display
MENU screen.

2)

Select Data logging with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

3)<DATA LOGGER screen> is displayed.
Select the item with the [AIR ADJ./▲switch] and press and hold the[POWER/MENU switch].
Item
Start

Clear
Interval

NOTE

Execution detailStart logging.
See on page 17.
Stop logging
See on page 18.
Delete logging data.
See on page 19.
Set logging cycle.
See on page 20.

<MENU screen>

Alarm test
Data logging
Set up<MENU screen>[▲]Select [MENU]:OK[MENU(Tap)]:Return<DATA LOGGER screen>
DATA LOGGER
Start
Clear
Interval[
30 sec]Remaining [ 150H 0M][▲]:Select [MENU]:OK[MENU(Tap)]:Return・ PC (see on page 1 for system requirements) and the log data
download software (option, sold separately) are required to readout logging data. Since data is in CVS format, it can be opened in
spreadsheet (Microsoft Excel) or word processing software.
・ The logging cycle has a margin of error of +/-1 %. Since the logging
data collection set (sold separately) calculates the time from thestart time and the volume of data, it may cause the time difference
if the logging time is long.

- 16 -

To start Logging:
NOTE

1)

Set the clock before starting the logging.

Follow steps 1 to 2 on page 16 to display <DATA LOGGER screen>.
<DATA LOGGER screen>

NOTE

The
logging
data
records
instantaneous value in one cycle.
"Interval" (logging cycle) and"Remaining" (time left for logging)will be displayed at the bottom ofscreen. See on page 20 tochange the logging cycle.
The logging will stop automaticallywhen the logging time runs out.

2)

“Start” is pre-selected. Press and hold the[POWER/MENU switch].

3)<Logging started screen> is displayed andit starts logging.

DATA LOGGER
Start
Clear
Interval[
30 sec]Remaining [ 150H 0M][▲]:Select [MENU]:OK[MENU(Tap)]:Return<Logging started screen>
DATA LOGGER
Logging
startedInterval[
30 sec]Remaining [ 150H 0M][MENU(Tap)]: Return

4)

Return to <Gas Concentration screen> bypressing the [POWER/MENU switch].
“LOGGING” blinks in the date section of<Gas Concentration screen> while logging.

- 17 -<Gas Concentration screen>

OxygenCombustible
gas
HydrogenSulfideCarbonMonoxideTo stop Logging:

1)

Follows steps 1 to 2 on page 16 to display<Logging screen>.

<Logging screen>
Logging
Stop logging?
Remaining [ 149H42M][MENU]: Stop
[MENU(Tap)]: Return2)

Press and hold the [POWER/MENU switch]
to stop logging. <Logging stopped screen>
will be displayed.

<Logging stopped screen>
DATA LOGGER
Logging
stoppedInterval[
30 sec]Remaining [ 149H42M][MENU(Tap)]: Return

3)

Return to <Gas Concentration screen> by pressing the [POWER/MENU
switch].

- 18 -



To delete Logging Data:

1)

Follow steps 1 to 2 on page 16 to display <DATALOGGER screen>.

2)

3)

Select “Clear” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

<Delete memory screen> will be displayed.
NOTE

4)

The logging data will be deletedcompletely. Save all the necessary
data to PC with log data download
software (optional).

Press and hold the [POWER/MENU switch] todelete logging data. <Complete Deletion
screen> will be displayed.

<DATA LOGGER screen>
DATA LOGGER
Start
Clear
Interval[
30 sec]Remaining [ 150H 0M][▲]:Select [MENU]:OK[MENU(Tap)]:Return<Delete memoryr screen>
DATA LOGGER
Delete memory
Delete all?
[MENU]:Delete[MENU(Tap)]:Return<Complete Deletion screen>
DATA LOGGER
Memory has been
deleted[MENU(Tap)]: Return

4)

Return to <DATA LOGGER screen> by pressing the [POWER/MENU
switch].

- 19 -



Changing the Logging Cycle (Interval):

1)

Follow steps 1 to 2 on page 16 to display<DATA LOGGER screen>.

2)

Select “Interval” with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

3)<Interval Setting screen> will be displayed.
Press the [AIR ADJ./▲ switch] to change
the value.
“Remaining” indicates the time left for
logging.
Example: The maximum remaining time of
30-second cycle is 150 hours; the maximum
remaining time of 300-second cycle is 1500
hours.

<DATA LOGGER screen>
DATA LOGGER
Start
Clear
Interval[
30 sec]Remaining [ 150H 0M][▲]:Select [MENU]:OK[MENU(Tap)]:Return<Interval Setting screen>
DATA LOGGERInterval[

30 sec]Remaining [ 150H 0M][▲]:Select [MENU]:OK[MENU(Tap)]:Return

Configurable logging interval
0.5-second
1-second cycle from 1 to 10 seconds
10-second cycle from 10 to 60 seconds
60-second cycle from 60 to 600 seconds
600-second from 600 to 3600 seconds.

NOTE

4)

Keep pressing the [AIR ADJ./▲ switch] to move the value up to 3600 seconds
automatically. Press the switch again to return to 0.5 seconds.

Press and hold the [POWER/MENU switch] to save changes, and return to<DATA LOGGER screen>. (Pressing the [POWER/MENU switch] returns to<DATA LOGGER screen> without saving changes.)- 20 -

Functions and Setting: Alarm Level•

Disable the safety lock to change the Alarm Level. Follow the steps on page 28.
WARNING

1)

2)

Setting the alarm level is very important. Only the safety manager, or
the other authorized personnel, can configure the alarm level setting.
Make sure all the setting values are correct when the alarm level has
been changed.

Press the [POWER/MENU switch] forapproximately one second to display<MENU screen>.
Select “Set up” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

3)<SET UP 1/2 screen> will be displayed.
“Alarm” is pre-selected. Press and hold the[POWER/MENU switch].

4)<ALARM SETTING screen> will be
displayed.
Select the item to change by pressing andholding the [POWER/MENU switch].

5)

Press the [AIR ADJ./▲ switch] to change
the values. Keep pressing the switch toadjust values automatically.

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET UP 1/2 screen>
SET UP 1/2
Alarm
Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return<ALARM SETTING screen>
ALARM SETTING
[L]
[H]
O2:
18.0 19.5 %
18.0
COMB:
10
30 %LEL
H2S:
10.0 15.0 ppm
CO:50
150 ppm[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Configurable setting range.
O2: 18 to 25 vol%, COMB: 5% to 60%LEL
H2S: 1.5 to 30 ppm, CO: 15 to 150 ppm

6)

Press and hold the [POWER/MENU switch] to save changes, and selectnext item to change.

7)

Return to <Gas Concentration screen> by pressing the [POWER/MENU
switch].

- 21 -

Functions and Setting: Clock Adjustment•
1)

Press and hold the [POWER/MENU switch]
for approximately one second to display<MENU screen>.

2)

Select “Set up” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

3)<SET UP 1/2 screen> will be displayed.
Select “CLOCK” with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

4)<SET THE CLOCK screen> will be
displayed.
Select the item to change with the [AIRADJ./▲ switch], and press and hold the[POWER/MENU switch].

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET UP 1/2 screen>
SET UP 1/2
Alarm
Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET THE CLOCK screen>
SET THE CLOCK
DATE:
2009.10.01(
Y. M. D)
TIME:
12:00:00(H:M: S)[▲]:Select [MENU]:OK[MENU(Tap)]:Return5)

Press the [AIR ADJ./▲ switch] to change
the date and time.

6)

Press and hold the [POWER/MENU switch]
to save changes.

7)<SET THE CLOCK screen>
SET THE CLOCK
2009
DATE:
2010.10.01(
Y. M. D)
TIME:
12:00:00(H:M: S)[▲]: Select [MENU]:OK[MENU(Tap)]:Return

Return to <Gas Concentration screen> by pressing the [POWER/MENU
switch].

- 22 -

Functions and Setting: O2 Alarm Mode•

Disable the safety lock to change the O2 Alarm Mode. Follow the steps on page 28.
WARNING

1)

Only the safety manager, or the other authorized personnel, canconfigure the O2 alarm mode. Set to “Low” (lower-limit alarm) for
detecting oxygen deficient. The alarm will not activate when the O2
alarm mode is set to “High” (upper-limit alarm).

Press and hold the [POWER/MENU switch]
for approximately one second to display<MENU screen>.

2)

Select “Set up” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

3)<SET UP 1/2 screen> will be displayed.
Select “O2 alarm mode” with the [AIRADJ./▲ switch], and press and hold the[POWER/MENU switch].

4)<O2 alarm mode screen> will be displayed.
Select the item to change with the [AIRADJ./▲ switch].

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET UP 1/2 screen>
SET UP 1/2<Set 1/2Alarm
screen>Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return<O2 alarm mode screen>[Alarm]High, Low
High, Low

[hold]↓Peak↑Peak

Low Low↓Peak

High High↑Peak[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Mode
High, Low ↓ PeakHigh, Low ↑ PeakLow, Low ↓ PeakHigh, High ↑ Peak

5)

Alarm settingst
1 stage [H] Upper-limit alarmst
1 stage [L] Lower-limit alarmst
1 stage [H] Upper-limit alarmst
1 stage [L] Lower-limit alarmst
1 stage [H] Lower-limit alarmnd
2 stage [L] Lower-limit alarmnd
2 stage [H] Upper-limit alarmst
1 stage [L] Upper-limit alarm

Peak-hold setting
Lowest value
Highest value
Lowest value
Highest value

Press and hold the [POWER/MENU switch] to save changes and return to<ALARM SETTING screen>. Set the appropriate alarm level for O2 (see on
page 21). (Pressing the [POWER/MENU switch] returns to <Gas
Concentration screen> without saving changes.)- 23 -

Functions and Setting: Volume/Silent•

Disable the safety lock to change the Volume/Silent. Follow the steps on page 28.
WARNING Only the safety manager, or the other authorized personnel, canconfigure the alarm sound volume.

1)

Press the [POWER/MENU switch] forapproximately one second to display<MENU screen>.

2)

Select “Set up” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

3)<SET UP 1/2 screen> will be displayed.
Select “To 2/2 page” with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET UP 1/2 screen>
SET UP 1/2
Alarm<Set 1/2
screen>Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

4)<SET UP 2/2 screen> will be displayed.
“Volume/Silent” is pre-selected. Press andhold the [POWER/MENU switch].

<SET UP 2/2 screen>***

SET UP 2/2

Volume/Silent***

LCD Contrast
Display
Safety lockto 1/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return- 24 -

5)<VOLUME SETTING screen> will be displayed.
Select the item to change with the [AIRADJ./▲ switch], and press and hold the[POWER/MENU switch].
Item

Content of change

SilentThe silent mode will stop all thebuzzers.
Silent mode deactivated<VOLUME SETTING screen>
VOLUME SETTING
SilentAlarm sound
Beep[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Silent mode activated
Alarm
sound

Set the buzzer sound volume of
The main unit for the gas alarm.

Beep

Set the beep for operation and the
Buzzer sound volume when anerror message is displayed.

6)

Press the [AIR ADJ./▲ switch] to change the setting.

7)

Press and hold the [POWER/MENU switch] to save the changes.
NOTE

8)

Press and release the [POWER/MENU switch] to return to <Gas
Concentration screen> without saving changes. Make sure to verify thechanges by alarm test.

Press and release the [POWER/MENU
switch] to return to <Gas Concentration
screen>.
On silent mode,
blinks in the datesection of <Gas Concentration screen>.

- 25 -<Gas Concentration screen>
OxygenCombustible<ガス濃度画面>gas
HydrogenSulfideCarbonMonoxideFunctions and Setting: LCD Contrast

•
1)

Press
the
[POWER/MENU
switch]forapproximately one second to display <MENU
screen>.

2)

Select “Set up” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU switch].

3)<SET UP 1/2 screen> will be displayed.
Select “to 2/2 page” with the [AIR ADJ./▲switch], and press and hold the [POWER/MENU
switch].

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET UP 1/2 screen>
SET UP 1/2
Alarm
Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

4)

5)<SET UP 2/2 screen> will be displayed.
Select “LCD Contrast” with the [AIR ADJ./▲switch], and press and hold the [POWER/MENU
switch].

<LCD CONTRAST screen> will be
displayed.
Press the [AIR ADJ./▲ switch] to change theparameters.
NOTE

6)

Too high LCD contrast will bedifficult to read the display.

<SET UP 2/2 screen>
SET UP 2/2
Volume/Silent

LCD Contrast

Display

to 1/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return<LCD CONTRAST screen>
LCD CONTRAST[▲]:Adjust [MENU]:OK[MENU(Tap)]:Return

Press the [POWER/MENU switch] to save the changes and return to <Gas
Concentration screen>.
Press and release the [POWER/MENU switch] to return to <Gas
Concentration screen> without changing the parameters.

- 26 -

•

Functions and Setting: Display Setting
1)

Press the [POWER/MENU switch] forapproximately one second to display <MENU
screen>2)

Select “Set up” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

3)<SET UP 1/2 screen> will be displayed.
Select “To 2/2 page” with the [AIR ADJ./▲switch] , and press and hold the[POWER/MENU switch].

<MENU screen><MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET UP 1/2 screen>
SET UP 1/2
Alarm
Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

4)<SET UP 2/2 screen> will be displayed.
Select “Display” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

<SET UP 2/2 screen>
SET UP 2/2
Volume/Silent
LCD Contrast
Display[▲]:Select [MENU]:OK[MENU(Tap)]:Return

5)

6)
7)

<DISPLAY SETTING screen> will be displayed.
Select the item with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].
Item

Changing detail[Japanese] [English]

Language can be selected[Display 1] [Display 2]

Display 1…Quadrant display
Display 2…Japanese/English

B.light timer

Set the period of time fortimeout

Press the [AIR ADJ./▲ switch] to change thesetting.
Press and hold the [POWER/MENU switch] tosave the changes and return to <Gas
Concentration screen>.

- 27 -<DISPLAY SETTING screen>
DISPLAY SETTING[Japanese] [ English][Display1] [Display2]
B.lighttimer [---]min
to 1/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Refer to page 10 for thedetails on backlight timer.

<DISPLAY SETTING screen>
DISPLAY SETTING[Japanese] [ English][Display1] [Display2]
to 1/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:ReturnFunctions and Setting: Safety Lock•

WARNING

The safety lock is very important. Only the safety manager, or theother authorized personnel, can disable the safety lock.

Configuring the safety lock will prevent to change the following settings. Disable thesafety lock to change the setting.
* Safety lock is a factory default setting.
Alarm level, O2 alarm mode, gas adjustment, volume/silent
 Setting of safety lock

<MENU screen>

1)

Press the [POWER/MENU switch] forapproximately one second to display<MENU screen>.

2)

Select “Set up” with the [AIR ADJ./▲ switch],and press and hold the [POWER/MENU
switch].

[▲]:Select [MENU]:OK[MENU(Tap)]:Return

3)<SET UP 1/2 screen> will be displayed.
Select “to 2/2 page” with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

<SET UP 1/2 screen>

Alarm test
Data logging
Set upSET UP 1/2
Alarm
Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

4)

5)<SET UP 2/2 screen> will be displayed.
Select “Safety lock” with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

<SET UP 2/2 screen>
SET UP 2/2
Volume/Silent
LCD Contrast
Display
Safety lockto 1/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Pressing the [AIR ADJ./▲ switch] changes the safety lock setting.
<Safety lock is canceled ><Safety lock>[▲]:Lock [MENU]:OK[MENU(Tap)]: Return[▲]:Unlock [MENU]:OK[MENU(Tap)]: Return- 28 -

6)

7)

Pressing and holding the [POWER/MENU
switch] saves the changes. Lock marks are
displayed on locked functions.
(Pressing the switch returns to <Gas
Concentration screen> without saving thechanges.)<Safety lock>
SET UP 1/2
Alarm

Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Return to <Gas Concentration screen> by pressing the [POWER/MENU
switch].

 Disable the safety lock1)

Press the [POWER/MENU switch] forapproximately one second to display<MENU screen>.

2)

Select “Set up” with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

3)<SET UP 1/2 screen> will be displayed.
Select “to 2/2 page” with the [AIR ADJ./▲switch], and press and hold the[POWER/MENU switch].

<MENU screen>

Alarm test
Data logging
Set up[▲]:Select [MENU]:OK[MENU(Tap)]:Return<SET UP 1/2 screen>
SET UP 1/2
Alarm
Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

4)<SET UP 2/2 screen> will be displayed.
Select “key” mark with the [AIR ADJ./▲switch],
and
press
and
hold
the
[POWER/MENU switch].
“Key” mark will appear as pressing the [AIRADJ./▲ switch].

- 29 -<Safety lock is canceled>
SET UP 2/2
Volume/Silent
LCD Contrast
Display
to 1/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

5)

6)

“Key” mark approaches to keyhole by pressing the [AIR ADJ./▲ switch] several
times. When “key” mark moves close to keyhole, press and hold the[POWER/MENU switch].
<Approaching Key mark><Key mark comes close to keyhole>[▲]: Select [MENU]: OK[MENU(Tap)]: Return[▲]: Select [MENU]: OK[MENU(Tap)]: Return

Press the [AIR ADJ./▲ switch] to disable the safety lock.
<Safety lock release screen><Safety lock screen>[▲]: Unlock [MENU]:OK[MENU(Tap)]: Return

7)8)[▲]: Lock [MENU]:OK[MENU(Tap)]: Return

Press and hold the [POWER/MENU switch]
to save the changes. “Key” mark will be off
and safety lock will be canceled.
(Pressing the switch returns to <Gas
Concentration screen> without saving thechanges.)<Safety lock is canceled>
SET UP 1/2
Alarm
Clock
O2 alarm mode
Span adjustment
to 2/2 page[▲]:Select [MENU]:OK[MENU(Tap)]:Return

Press and hold the [POWER/MENU switch] to save the changes and return to<Gas Concentration screen>.

- 30 -

4. Notifications and Error Messages
Any abnormality or notice in the Multi-gas Detector will display a message on the LCD
screen (buzzer sounds.) Major displayed messages are listed below. Take appropriate
measures in accordance with the message displayed.
・ When the switch or display does not function correctly without displaying error
message, reset batteries and turn on the power again. If it still does not work
properly, consult your New Cosmos representative.

•

Notification message
Notification message

O2 sensor out ofservice life.
Replace O2 sensor
with new one.
［LOGGER STOP］
Memory becomes
full. Detector
stopped data logging.
**Data Logger**
Can not start
Set the clock.

•Error message

Message

Unable to zero** [E10] **Sensor failure** [E01] **RTC(U11) ERROR
Sensor failure
Should detection
continue only withactive sensors?
[LOGGER STOP]
Memory failure.
Detector stopped
data logging.

ActionService life of oxygen sensor is expiring.
Request an oxygen sensor replacement immediately before adetection failure.
Memory capacity for logging is full. Save data to a PC using
the logging data collection set (sold separately) as necessary.
Logging can be resumed by erasing data (see on page 19).
Logging cannot be started due to a stopped clock.
Set clock (see on page 22) to resume logging.

ActionTurn on the power for approximately 10 minutes in pure air
followed by pressing the [AIR ADJ./▲ switch] forapproximately two seconds to execute automatic air
adjustment.
Turn off the power once then re-start in the event of failure to
recover.
Request repairs if the recovery is not successful.
RTC (clock IC) is abnormal.
Request repairs.
Pressing the [AIR ADJ./▲ switch] for approximately two
seconds will execute automatic air adjustment for anabnormal sensor then return to the Gas Concentration
screen. At this time, the gas concentration for an abnormal
sensor will display blank. Return to the original display before
the abnormal condition by pressing the [POWER/MENU
switch]. Request repairs in the event that keeping the power
on for approximately 10 minutes in pure air and restarting thepower source do not achieve normal recovery.
Memory for logging is abnormal. Request repairs in the eventthat logging cannot be resumed by erasing data (see on page19). The Multi-gas Detector is possibly abnormal.

- 31 -

5. Replacing Consumables
Replacing filter element•

A tainted or wet filter element needs to be replaced with a new one.
WARNINGNOTE• Attach the filter element properly. Otherwise, it may not meet thewaterproof structure.
• Securely tighten screws to prevent water from penetrating into theMulti-gas Detector.
• If the water penetrates inside the Multi-gas Detector, request a
repair. It cannot detect gases properly.

Do not push or poke the filter element. It may damage the waterproof
structure.

1)

Remove four screws on the bottom of theMulti-gas Detector and take off the sensor
cover.
Sensor cover

2)

Remove the old filter element and attach the
new filter on the sensor cover. Align theholes on the left and right sides of thereplacement filter element with the projectionof the sensor cover here.

4-screws

Align to projection

Filter element for combustible gas sensor
Detection port

CAUTION Confirm that white “filter
element for combustible gas sensor” isattached inside the detection port of
combustible gas sensor.

3)

Tighten four screws and attach the sensor cover on the Multi-gas Detector.
Four screws need to be gradually tightened alternatively to avoid
off-centered tightening.

- 32 -

Battery Replacement•

When the battery level drops, the battery low pre-alarm buzzer will sound (pi…pip… andthe alarm lamp on top of the Multi-gas Detector will flicker). It is recommended to replacebatteries immediately.
Pressing and holding the [AIR ADJ./▲ switch] stops the buzzer.
Low Battery Alarm

Battery Exhausted

Low battery
Replace batteries.

(Flicker)(Flicker)

When the battery status shows Battery
Exhausted icon, <Low battery screen> will
be displayed and the Multi-gas Detector will
not work properly.
WARNING

NOTE

1)
2)
3)

4)

<Low battery Screen>(Do not replace Batteries
in potentiallyhazardous area.)• Always remove water and dust before opening the battery lid. Entry ofwater or dust inside the Multi-gas Detector may cause trouble.
• Remove any dust from the O-ring of the battery lid or seal face of theMulti-gas Detector body and battery lid. Even a slight amount of dust
may allow water inside the Multi-gas Detector.
• Replace the battery lid AS if the O-ring has any damage (see on page35), or it may allow water inside the Multi-gas Detector.
• Replace batteries in a safe place.
• Use two AA alkaline dry cell batteries (LR6) made by PANASONIC.
Otherwise, it may damage the explosion-proof structure.

• Use the same kind of batteries and always use fresh batteries.
• Replace two batteries at the same time.
• It is recommended to replace batteries early when the level is low even
before getting the remaining battery level low alarm.

Press and hold the [POWER/MENU
switch] to turn off the power.
Twist the battery lid lock to release(OPEN) and open the lid.
Remove old batteries and insert newbatteries (two AA alkaline dry cells (LR6)made by PANASONIC) with correct
polarity as printed on a label.
Attach the battery lid and twist it lock tolock (LOCK).

- 33 -

Battery lid lock

6. Maintenance Check
This Multi-gas Detector is a precision equipment. Maintenance in accordance with thefollowing items is imperative for maintaining performance of the Multi-gas Detector
and ensuring safety. In the event of a violation of Safe Operation instructions (seeon pages 3-4), such as impact shock from dropping or exposure to water, or
improper use as described in Specifications (see on page 37), such as detecting
gas concentration exceeding the detection range or use in temperatures andhumidity exceeding the use range, it is suggested to request an inspection (withfee) along with a description of the situation.

•

Daily Check
Items to check

Description

Alarm function

Check that the alarm lamps and buzzer for the gas detector work
properly. (See on page 15.)

Alarm indications

Check the alarm indications by having the Multi-gas Detector draw
gas at a level that slightly exceeds the alarm level. Check that thegas concentration values change. Then check that the alarm lamp
flickers and that the buzzer sounds once the gas concentrations
reach the alarm level. In the event of an abnormality in the way thegas concentration values change, such as the alarm lamp does
not flicker or the buzzer does not sound, request repairs. (If theMulti-gas Detector is set to the No Sound mode or the volume tozero, the buzzer will not sound.)Filter element

Tainted or wet filter element needs to be replaced with a new one.
(See on page 32.)
Check remaining battery level at lower right-hand corner of the
LCD display.
<LCD display>
OxygenRemainingbattery level

Combustible
gas
HydrogenSulfideCarbonMonoxide

Remaining level

Remainingbattery level

High・・・・・・・・ Low Replace(Flicker)(Flicker)

If the level is low, replace batteries. (See on page 33.)

NOTE

Date and time

Prepare spare batteries or replace earlier due toshorter battery life in cold temperature.

Adjust if the year, month, date and time setting is incorrect. (Seeon page 22.)

- 34 -

•

Periodic Check・・

To ensure the accuracy of the Multi-gas Detector, contact your New
Cosmos representative for inspection more than once every six months.
To ensure the accuracy of the Multi-gas Detector, contact your New
Cosmos representative for a routine inspection more than once a year.
WARNING The sensor of Multi-gas Detector is warranted for a period of one

year from the date of purchase. Proper detection may not be
guaranteed after the period of one year. It is recommended to be
replaced.

•

Spare Parts
Item name

Model

Filter element

FE-122 (2 pieces)

XA-4000 battery lid AS(with O-ring)59519205- 35 -

Remarks

7. Troubleshooting
Before requesting repairs, please check the items in the following table. * When theMulti-gas Detector fails to operate, remove all batteries. After several minutes, install
the batteries and try again.
Symptom
Power does not be turned
ON by pressing the
POWER switch.
The message “Battery low”
is displayed.
The buzzer does not sound.
A notice or error message isdisplayed on LCD screen.

Cause
Reverse polarity ofbatteries
Run out of batteries
The battery voltage
reaches cutoff voltage.
The Multi-gas Detector
is set to Silent mode.
The sound volume isset to “0”.

Treatment
Install batteries again in
the correct polarity.
Replace the batteries.
Replace the batteries.
Deactivate the Silent
mode.
Set sound volume to“1” or higher.

Reference
Battery
replacement(Page 33)

Volume /Silent(Page 24)

See “Notifications and Error Messages” on page 31.

8. Warranty
New Cosmos Electric Company Limited (hereafter referred to as “New Cosmos”) offers thefollowing as the sole and exclusive limited warranty available to the Customer. This warranty
is in lieu of, and the Customer waives, all other warranties of any kind or nature, expressed or
implied, including without limitation any warranty for merchantability or fitness for a particularpurpose. The remedies set forth herein are exclusive.
New Cosmos warrants to the original purchaser (Customer) and no other person or entity thatthe gas detection product supplied by New Cosmos shall be free from defects in materials andworkmanship for a period of one (1) year from the date of purchase. This warranty does not
apply to consumables, including but not limited to fuses and filters. Certain other accessories
not specifically listed here may have different warranty periods.
If after examination of an allegedly defective product returned to New Cosmos, with freight
prepaid, should it be found that the product fails to conform to this warranty, the Customer’s
only remedy and New Cosmos’s only obligation shall be, at New Cosmos’s sole discretion,
replacement or repair of the non-conforming product or refund of the original purchase price ofthe non-conforming product. In no event shall New Cosmos be liable for any other special,incidental, or consequential damages or losses of any kind whatsoever, including but notlimited to loss of anticipated profits and any other loss caused by reason of non-operation of
the product.
This warranty is valid only if the product is maintained and used in accordance with New
Cosmos’s instructions and recommendations. New Cosmos shall be released from all
obligations under this warranty in the event repairs or modifications are made by persons
other than its own or authorized service personnel or if the warranty claim results fromphysical abuse or misuse of the product.

- 36 -

9. Specifications
Model
Target gas
Combustible gas
Detection principle
Catalytic Combustion
Gas sampling method
Detection range
0 to 100%LEL(service range)(101 to 110%LEL)
Indicated accuracy*3(service range)
Display resolution
Alarm setting value
Response time*5
Gas alarm method
Power source
Continuous use*6

XA-4400
OxygenHydrogen sulfide
Carbon monoxide
Galvanic Cell
Electrochemical cell Electrochemical cell
Diffusion
0–25.0vol%0–30.0ppm
0–300ppm(25.1–50.0vol%)(30.1–150.0ppm) *1 (301–2000ppm) *2
150ppm or less:within ±15ppm
Within ±10%LEL
Within ±0.5vol%Within ±1.5ppm
151 to 300ppm:
within ±30ppm
1%LEL
0.1 vol%
0.1 ppm
1 ppm
1st stage: 10.0ppm
1st stage: 50ppm
1st stage: 10%LEL 1st stage: 19.5vol% 2nd stage:15.0ppm
2nd stage: 150ppm
2nd stage: 30%LEL 2nd stage: 18.0vol% TWA: 10.0ppm
TWA: 25ppm
STEL: 15.0ppm
STEL: 300ppm*4
Within 60 seconds Within 20 seconds Within 30 seconds Within 30 seconds
Buzzer sounds. Red LED flicker. LCD flicker. Vibration (automatic recovery)
Two size AA dry batteries (LR6) made by PANASONIC 1.5VDC
15 hours. Approximately 60 hours for model without combustible gas.
(without alarm, backlight, and data logging, at 25 degrees C)

Operating temperature-10 to 40 degrees C, 30 to 85% RH (No condensation)*7
and humidity
Ambient Temperature -20 to 50 degrees C
Explosion-proof structure Ex iad II BT3 X (Japan)*8
Protection class
IP67 or equivalent *9・Self-diagnosis (Sensor abnormality, Zero adjustment disabled)・Zero setting (with oxygen adjusted at 21.0%)
・Alarm test
・Automatic back light・Peak-hold function (Lower limit peak only for oxygen(for default setting))
・Remaining battery level display, temperature, clock display
Functions・Remaining battery level low pre-alarm・Buzzer off (when the buzzer sounds)
・TWA/STEL alarm・Change the alarm volume (when the lock is off)
・Change the alarm setting value(when the lock is off)・Data logging (need to set for Data logging)
Dimensions
79 (W) × 89 (H) × 33 (D) mm (excluding projection)
WeightApproximately 230 g (including batteries)*1 Increments of 0.5 ppm from 35.0 to 150.0 ppm.
*2 Increments of 5 ppm from 350 to 2,000 ppm.
*3 Based on the same conditions.
*4 STEL alarm setting value for CO is not defined in ACGIH and it uses manufacturer's standards.
*5 Response time: To be a time for response of 90%. (Condition is at ambient temperature of 20±2 degrees C)*6 It may vary according to circumstances, operating condition, storage period, and battery manufacturer.
*7 Operating temperature is subject to change in the range of surrounding temperature.
*8 Hydrogen and Acetylene are not covered by explosion-proof structure.
*9 Dust-proof and waterproof structure which satisfies the test of New Cosmos Electric complying with JIS C
0920-2003 Ingress Protection code IP67 in the condition of brand-new Multi-gas Detector.
However, this Ingress Protection code IP67 does not guarantee any gas detection.
The IP67 means a structure (IP6X) with which a Multi-gas Detector for testing is conducted in a dust test on
depressurized condition at a maximum 2 kPa to verify that there is no accumulation of dust inside, and astructure (IPX7) with which a Multi-gas Detector for testing is slowly immersed in a stationary water bath filledwith tap water at normal temperature with its bottom end at 1 m from the water surface for 30 minutes to verify
that there is no water entry and damage from such exposure.

Aforementioned specification is subject to change without notice.

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10. Detection Principle•

Diaphragm galvanic cell (oxygen)
The sensor consists of a noble metal electrode, a base metal electrode, and anelectrolytic solution. A noble metal electrode has contact with the air through the Teflon
membrane.
Due to the electrical potential difference from the load resistance caused by connecting
to both terminals, the following reaction takes place.
Noble metal electrodeO2＋2H2O＋4e-→4OH-

Base metal electrode

2Pb→2Pb2＋＋4e-

As a result, the electrical current commensurate with the oxygen concentration value inthe air flows from the noble metal electrode to the base metal electrode through anexternal circuit.

•

Electrochemical cell (hydrogen sulfide, carbon monoxide)
The sensor consists of three electrodes and an electrolytic solution. This method uses a
potentiate circuit for electrolytic oxidation to maintain the working electrode at a certain
electrical potential as contrasted with the reference electrode. The gas concentration is
obtained by measuring the electrical current generated in this process.
The following explains the electrolytic reaction of hydrogen sulfide:•-Working electrodeH2S＋4H2O→H2SO4＋8H＋＋8eCounter electrode

2O2＋8H＋＋8e →4H2O-

Catalytic combustion (combustible gas)
A catalyst applied to the surface of a platinum coil causes catalytic combustion on thesurface of the catalyst even when the gas concentration value is lower than the lower
explosion limit. The temperature rise in this process increases the electrical resistance of
platinum coil.
This change is picked up as deviation voltage for the abridged circuit. The combustible
gas can be detected up to the lower explosion limit (LEL).

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11. Glossary
O2: Oxygen
H2S: Hydrogen sulfide
COMB: Combustible gas
CO: Carbon monoxide
Ambient temperature: Atmospheric temperature around the electric instrument to maintain its
explosion-proof structure.
Operating temperature and humidity range: Atmospheric temperature and humidity around the electric
instrument to ensure accuracy and proper operation.
Air adjustment: Adjustment of zero point in pure air.
Span adjustment: Adjustment of indication value with span gas.
Explosion-proof: Equipment designed in accordance with existing codes and standards such that it will
operate in a specified hazardous environment without causing an explosion.
Intrinsically safety: A protection technique for safe operation of electrical equipment in hazardous areas
by limiting the energy available for ignition.
Flameproof enclosure: An enclosure that can withstand the pressure developed during an internal
explosion of an explosive mixture and that prevents the transmission of the explosion to the
explosive atmosphere surrounding the enclosure and that operates at such an external
temperature that a surrounding explosive gas or vapor will not be ignited thereby.
Nonhazardous area: A location in which fire or explosion hazards are not expected to exist specifically
due to the presence of flammable gases or vapors, flammable liquids, combustible dusts, or
ignitable fibers.
% LEL: Concentrations of combustible gas given in terms of percent of the lower explosive limit.
Vol% : Gas concentrations given in terms of percent of cubic volumeService range: A range out of the detection range showing the reading as a rough standard.
Lower explosive limit (LEL): The Lower Explosive Limit of a flammable gas or vapor (percentage by
volume in air in which explosion can occur upon ignition in a confined area.
TLV-TWA (Threshold Limit Values - Time Weighted Average) : Expressed as TWA in this manualThreshold limit value of time weighted average. A time weighted average concentration of harmful
material considered to have no harmful influence on the health of the majority of workers who areexposed during average work time of either eight hours daily or 40 hours weekly.
TLV-STEL (Threshold Limit Values - Short Term Exposure Limit): Expressed as STEL in this manualThreshold limit value of short term exposure limit. A concentration of harmful material that has noharmful influence on the health of workers who are exposed for a continuous 15 minutes as long as
daily exposure is TWA or less. (Exposure shall be four times or less per day, and the interval of the
exposure shall be at least 60 minutes.)(Partly cited from Industrial Gas Detectors & Monitors Association, Glossary of the Gas Detector Alarms,
and Detection Tube Type Gas Measuring Instrument)- 39 -

MEMO- 40 -

- 41 -

Distributor:

Manufacturer:
New Cosmos Electric Co., Ltd.
2-5-4 Mitsuya-naka
Yodogawa-ku
Osaka 532-0036, Japan
Phone 81-6-6309-1505
Fax 81-6-6309-1514
e-info@new-cosmos.co.jp
http://www.new-cosmos.co.jp

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