Cosmos XA-440011 User manual

Model Variations
Model Target Gas
XA-4400II Combustible gas, H2S, CO, O2
XA-4300IIKHC Combustible gas, H2S, CO
XA-4300IIKCS Combustible gas, CO, O2
XA-4300IIKHS Combustible gas, H2S, O2
XA-4300IIHCS H2S, CO, O2
XA-4200IIKC Combustible gas, CO
XA-4200IIKH Combustible gas, H2S
XA-4200IIKS Combustible gas, O2
XA-4200IICH H2S, CO
XA-4200IICS O2, CO
XA-4200IIHS O2, H2S
This instruction manual is for the eleven models listed to the left.
Keep this manual for easy reference.
Carefully read this manual prior to use.
■ XA-4400II
■ XA-4300IIKHC
■ XA-4300IIKCS
■ XA-4300IIKHS
■ XA-4300IIHCS
■ XA-4200IIKC
■ XA-4200IIKH
■ XA-4200IIKS
■ XA-4200IICH
■ XA-4200IICS
■ XA-4200IIHS
Document No.: XA-4400IIATEXET

3-4. User Mode .......................................................................................... 16
3-4-1. Select User Mode ........................................................................ 16
3-4-2. Change Mode .............................................................................. 16
3-4-3. Exit Mode..................................................................................... 17
3-4-4. Operating Procedure.................................................................... 18
(A) Alarm Test ..................................................................................... 18
(B) Setting........................................................................................... 20
(B-1) Audio on/off ............................................................................ 20
(B-2) Audio Volume Control............................................................. 21
(B-3) Clock Adjustment ................................................................... 22
(B-4) Battery Saving Mode.............................................................. 23
(C) Data Logging ................................................................................ 24
(C-1) Start Logging.......................................................................... 24
(C-2) Stop Logging .......................................................................... 25
(C-3) Delete Logging Data .............................................................. 25
(C-4) Adjust Logging Interval Rate .................................................. 26
4. Error Messages ........................................................................................... 27
5. Consumable Replacement ......................................................................... 28
Battery Replacement BP-4000llAL ............................................................ 28
Charge Battery BP-4000llMH..................................................................... 29
Filter Element Replacement....................................................................... 30
COMB/CO Sensor Filter Replacement ...................................................... 32
Battery Unit Replacement .......................................................................... 34
6. Maintenance ................................................................................................ 35
Routine Check ........................................................................................... 35
Annual/Semiannual Inspection .................................................................. 36
Creaning .................................................................................................... 36
Spare Parts ................................................................................................ 36
7. Troubleshooting.......................................................................................... 37
8. Warranty....................................................................................................... 38
9. Specifications.............................................................................................. 39
Multi-gas Detector...................................................................................... 39
Explosion-proof Specifications ................................................................... 40
Explosion-proof Markings........................................................................... 41
10. Disposal ..................................................................................................... 42
11. Detection Principle.................................................................................... 42
12. Glossary..................................................................................................... 43
Table of Contents
Package Contents ............................................................................................. 1
Optional (sold separately) ................................................................................ 1
1. Introduction ................................................................................................... 2
Explosion-proof Requirements..................................................................... 3
Symbols Used in this Manual....................................................................... 3
Safety Precautions....................................................................................... 4
2. Unit Dimensions and Components.............................................................. 6
Multi-gas Detector........................................................................................ 6
LCD Indication ............................................................................................. 7
3. Operation ....................................................................................................... 8
3-1. Before Use............................................................................................ 8
3-1-1. Battery Installation ......................................................................... 8
3-1-2. Safety Pin Strap Installation ........................................................... 8
3-2. Operating Procedure ............................................................................ 9
1. Power on .............................................................................................. 9
2. Detection ............................................................................................ 10
3. Power off ............................................................................................ 11
Gas Concentrations Screen ................................................................... 11
Gas Alarms............................................................................................. 12
TWA Alarm ............................................................................................. 13
STEL Alarm ............................................................................................ 13
3-3. Normal Operation Functions ............................................................... 14
3-3-1. Air Adjustment (Zeroing) .............................................................. 14
3-3-2. Peak Hold .................................................................................... 14
3-3-3. Backlight ...................................................................................... 15
3-3-4. Mute Audio................................................................................... 15
3-3-5. Display Alarm Set Values ............................................................. 15
3-3-6. Display Date/Time/Temperature................................................... 15

3-4. User Mode .......................................................................................... 16
3-4-1. Select User Mode ........................................................................ 16
3-4-2. Change Mode .............................................................................. 16
3-4-3. Exit Mode..................................................................................... 17
3-4-4. Operating Procedure.................................................................... 18
(A) Alarm Test ..................................................................................... 18
(B) Setting........................................................................................... 20
(B-1) Audio on/off ............................................................................ 20
(B-2) Audio Volume Control............................................................. 21
(B-3) Clock Adjustment ................................................................... 22
(B-4) Battery Saving Mode.............................................................. 23
(C) Data Logging ................................................................................ 24
(C-1) Start Logging.......................................................................... 24
(C-2) Stop Logging .......................................................................... 25
(C-3) Delete Logging Data .............................................................. 25
(C-4) Adjust Logging Interval Rate .................................................. 26
4. Error Messages ........................................................................................... 27
5. Consumable Replacement ......................................................................... 28
Battery Replacement BP-4000llAL ............................................................ 28
Charge Battery BP-4000llMH..................................................................... 29
Filter Element Replacement....................................................................... 30
COMB/CO Sensor Filter Replacement ...................................................... 32
Battery Unit Replacement .......................................................................... 34
6. Maintenance ................................................................................................ 35
Routine Check ........................................................................................... 35
Annual/Semiannual Inspection .................................................................. 36
Creaning .................................................................................................... 36
Spare Parts ................................................................................................ 36
7. Troubleshooting.......................................................................................... 37
8. Warranty....................................................................................................... 38
9. Specifications.............................................................................................. 39
Multi-gas Detector...................................................................................... 39
Explosion-proof Specifications ................................................................... 40
Explosion-proof Markings........................................................................... 41
10. Disposal ..................................................................................................... 42
11. Detection Principle.................................................................................... 42
12. Glossary..................................................................................................... 43
Table of Contents
Package Contents ............................................................................................. 1
Optional (sold separately) ................................................................................ 1
1. Introduction ................................................................................................... 2
Explosion-proof Requirements..................................................................... 3
Symbols Used in this Manual....................................................................... 3
Safety Precautions....................................................................................... 4
2. Unit Dimensions and Components.............................................................. 6
Multi-gas Detector........................................................................................ 6
LCD Indication ............................................................................................. 7
3. Operation ....................................................................................................... 8
3-1. Before Use............................................................................................ 8
3-1-1. Battery Installation ......................................................................... 8
3-1-2. Safety Pin Strap Installation ........................................................... 8
3-2. Operating Procedure ............................................................................ 9
1. Power on .............................................................................................. 9
2. Detection ............................................................................................ 10
3. Power off ............................................................................................ 11
Gas Concentrations Screen ................................................................... 11
Gas Alarms............................................................................................. 12
TWA Alarm ............................................................................................. 13
STEL Alarm ............................................................................................ 13
3-3. Normal Operation Functions ............................................................... 14
3-3-1. Air Adjustment (Zeroing) .............................................................. 14
3-3-2. Peak Hold .................................................................................... 14
3-3-3. Backlight ...................................................................................... 15
3-3-4. Mute Audio................................................................................... 15
3-3-5. Display Alarm Set Values ............................................................. 15
3-3-6. Display Date/Time/Temperature................................................... 15

- 2 -
1. Introduction
Thank you for purchasing the New Cosmos Multi-gas Detector XA-4000II series. Prior to
use, please read this instruction manual to ensure safe and reliable operation.
This detector can measures from 2 to 4 gases, such as oxygen (O2), combustible gas
(COMB), hydrogen sulfide (H2S) and carbon monoxide (CO) and simultaneously
displays all gas concentrations. If gas concentrations reach a preset level, the detector
alerts the user via audible, visual and vibrating alarms, thus helping prevent incidents
such as low oxygen, gas poisoning and explosion.
Carefully read this manual regardless of your experience with gas detectors. Do not
use the detector for any purposes other than intended.
Waterproof
Keep the gas detection ports dry.
This detector employs a waterproof structure which meets the New
Cosmos-specified submersion test* compliant with EN60529
ingress protection code IPX7 in new condition to prevent
malfunctions due to water entry during normal usage. However, if
the filter element is wet, proper gas detection is not possible.
Gaskets or sealing deteriorated by age, or adhesion of foreign
materials, will impair the waterproof function, thus exposure to water
should be avoided as much as possible.
Submersion test procedure:
Submerge a brand new detector into room temperature tap water to
a depth of 1 meter for 30 minutes. Verify that water is not present
inside the detector.
WARNING
- 1 -
Package Contents
This product is packed and shipped with the utmost care. If any items are missing or
damaged, please contact New Cosmos or its distributor for replacement.
Optional (sold separately)
Item (Model) Description
Leather case (C-23) Protects from dirt and scratches.
Use with a safety pin strap.
Data logger kit (XA-4000IIL) Software to collect and transfer logged
data to PC.
Battery unit (BP-4000llAL) Replacement battery unit
Battery unit (BP-4000llMH),
rechargeable type Replacement battery unit
Battery charger (BC-9)
AC adapter
Item QTY
Multi-gas detector 1
Battery unit (pre-installed)
(BP-4000IIAL) Either
one
Battery unit (pre-installed), rechargeable type
(BP-4000IIMH)
Battery cover
Page 28 “Battery Replacement” 1
Safety pin strap, with 4 mounting screws
(C-25 )
Page 8 “Safety Pin Strap Installation”
1
Replacement filter elements (FE-128)
Page 30 “Filter Element Replacement” 8
COMB filter (model specific)
(FE-140)
Page 32 “COMB/CO Sensor Filter Replacement“
1
CO filter (model specific)
(FE-130)
Page 32 “COMB/CO Sensor Filter Replacement”
1
Panasonic AAA alkaline battery
(LR03) Either
one
GP rechargeable battery (model specific)
(GP75AAAHC)
Inspection certificate 1
Instruction manual 1

- 2 -
1. Introduction
Thank you for purchasing the New Cosmos Multi-gas Detector XA-4000II series. Prior to
use, please read this instruction manual to ensure safe and reliable operation.
This detector can measures from 2 to 4 gases, such as oxygen (O2), combustible gas
(COMB), hydrogen sulfide (H2S) and carbon monoxide (CO) and simultaneously
displays all gas concentrations. If gas concentrations reach a preset level, the detector
alerts the user via audible, visual and vibrating alarms, thus helping prevent incidents
such as low oxygen, gas poisoning and explosion.
Carefully read this manual regardless of your experience with gas detectors. Do not
use the detector for any purposes other than intended.
Waterproof
Keep the gas detection ports dry.
This detector employs a waterproof structure which meets the New
Cosmos-specified submersion test* compliant with EN60529
ingress protection code IPX7 in new condition to prevent
malfunctions due to water entry during normal usage. However, if
the filter element is wet, proper gas detection is not possible.
Gaskets or sealing deteriorated by age, or adhesion of foreign
materials, will impair the waterproof function, thus exposure to water
should be avoided as much as possible.
Submersion test procedure:
Submerge a brand new detector into room temperature tap water to
a depth of 1 meter for 30 minutes. Verify that water is not present
inside the detector.
WARNING
- 1 -
Package Contents
This product is packed and shipped with the utmost care. If any items are missing or
damaged, please contact New Cosmos or its distributor for replacement.
Optional (sold separately)
Item (Model) Description
Leather case (C-23) Protects from dirt and scratches.
Use with a safety pin strap.
Data logger kit (XA-4000IIL) Software to collect and transfer logged
data to PC.
Battery unit (BP-4000llAL) Replacement battery unit
Battery unit (BP-4000llMH),
rechargeable type Replacement battery unit
Battery charger (BC-9)
AC adapter
Item QTY
Multi-gas detector 1
Battery unit (pre-installed)
(BP-4000IIAL) Either
one
Battery unit (pre-installed), rechargeable type
(BP-4000IIMH)
Battery cover
Page 28 “Battery Replacement” 1
Safety pin strap, with 4 mounting screws
(C-25 )
Page 8 “Safety Pin Strap Installation”
1
Replacement filter elements (FE-128)
Page 30 “Filter Element Replacement” 8
COMB filter (model specific)
(FE-140)
Page 32 “COMB/CO Sensor Filter Replacement“
1
CO filter (model specific)
(FE-130)
Page 32 “COMB/CO Sensor Filter Replacement”
1
Panasonic AAA alkaline battery
(LR03) Either
one
GP rechargeable battery (model specific)
(GP75AAAHC)
Inspection certificate 1
Instruction manual 1

- 4 -
Safety Precautions
To ensure safe operation, follow the precautions below.
When a gas alarm activates, immediately take all the necessary
measures to prevent an explosion.
Air adjustment (zeroing) starts automatically 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.
This product is safety equipment. Perform a routine check before
use (page 35 “Routine Check”).
Do not cover any gas detection ports with any fabric, etc. If
blocked, correct detection is not possible.
Do not block the speaker opening. If blocked, the audible alarm
will be muffled.
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.
The recommended sensor replacement cycle is two years. The
sensor may fail to provide accurate detection after two years, and
should be replaced.
Use the specified battery. Use of batteries other than specified
may impair the product’s intrinsically safe characteristics (page 28
“Battery Replacement”).
WARNING
DANGER
- 3 -
Explosion-proof Requirements
Follow the conditions below to comply with the explosion-proof requirements.
Symbols Used in this Manual
This manual uses Danger, Warning, Caution and Note symbols to draw attention to
procedures, materials, methods, and processes, which require particular attention.
Indicates an imminently hazardous situation that can result in
death or serious injury.
Indicates a potentially hazardous situation that may result in
death or serious injury.
Indicates a hazardous situation that may result in minor injury
or property damage.
Provides information on product handling.
ATEX Explosion-proof: II 1 G Ex ia IIC T3 Ga
Certificate No.: CML 15ATEX2117X
Standard: EN 60079-0:2018
EN 60079-11:2012
IECEx Explosion-proof: Ex ia IIC T3 Ga
Certificate No.: IECEx CML 17.0009X
Standard: IEC 60079-0:2017 Ed.7
IEC 60079-11:2011 Ed.6
Rating: 1.5_VDC (LR03 manufactured by Panasonic x 1)
1.5_VDC (LR03 manufactured by Duracell x 1)
1.5_VDC (LR03 manufactured by Energizer x 1)
1.5_VDC (LR03 manufactured by Varta x 1)
1.3_VDC (GP75AAAHC manufactured by GP x 1)
Ambient temperature: -20 to 50 C
Conditions of use:
・ Replace the battery in a non-hazardous area.
・ Charge the battery in a non-hazardous area.
・ Charge the battery with a specified battery charger (BC-9).
・ Do not separate XA-4400ll and BP-4000llAL or BP-4000llMH when an explosive
gas atmosphere may be present.
・ To prevent accidents from electrostatic charges, wear anti-static working clothes
and conductive footwear (antistatic working shoes). Additionally the work floor
should be conductive (leak current: 10M ohm or less).
・ When the Energizer Type E92 AAA LR03 is used, the ambient temperature
range is -18 to +50 C.
・ The enclosure of this detector uses ABS resin. Avoid exposure to organic
solvents, strong acids, strong alkalis and mineral oils. Exposure may
com
p
romise the ex
p
losion-
p
roof structure of the detector.
WARNING
NOTE
DANGER
WARNING
CAUTION

- 4 -
Safety Precautions
To ensure safe operation, follow the precautions below.
When a gas alarm activates, immediately take all the necessary
measures to prevent an explosion.
Air adjustment (zeroing) starts automatically 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.
This product is safety equipment. Perform a routine check before
use (page 35 “Routine Check”).
Do not cover any gas detection ports with any fabric, etc. If
blocked, correct detection is not possible.
Do not block the speaker opening. If blocked, the audible alarm
will be muffled.
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.
The recommended sensor replacement cycle is two years. The
sensor may fail to provide accurate detection after two years, and
should be replaced.
Use the specified battery. Use of batteries other than specified
may impair the product’s intrinsically safe characteristics (page 28
“Battery Replacement”).
WARNING
DANGER
- 3 -
Explosion-proof Requirements
Follow the conditions below to comply with the explosion-proof requirements.
Symbols Used in this Manual
This manual uses Danger, Warning, Caution and Note symbols to draw attention to
procedures, materials, methods, and processes, which require particular attention.
Indicates an imminently hazardous situation that can result in
death or serious injury.
Indicates a potentially hazardous situation that may result in
death or serious injury.
Indicates a hazardous situation that may result in minor injury
or property damage.
Provides information on product handling.
ATEX Explosion-proof: II 1 G Ex ia IIC T3 Ga
Certificate No.: CML 15ATEX2117X
Standard: EN 60079-0:2018
EN 60079-11:2012
IECEx Explosion-proof: Ex ia IIC T3 Ga
Certificate No.: IECEx CML 17.0009X
Standard: IEC 60079-0:2017 Ed.7
IEC 60079-11:2011 Ed.6
Rating: 1.5_VDC (LR03 manufactured by Panasonic x 1)
1.5_VDC (LR03 manufactured by Duracell x 1)
1.5_VDC (LR03 manufactured by Energizer x 1)
1.5_VDC (LR03 manufactured by Varta x 1)
1.3_VDC (GP75AAAHC manufactured by GP x 1)
Ambient temperature: -20 to 50 C
Conditions of use:
・ Replace the battery in a non-hazardous area.
・ Charge the battery in a non-hazardous area.
・ Charge the battery with a specified battery charger (BC-9).
・ Do not separate XA-4400ll and BP-4000llAL or BP-4000llMH when an explosive
gas atmosphere may be present.
・ To prevent accidents from electrostatic charges, wear anti-static working clothes
and conductive footwear (antistatic working shoes). Additionally the work floor
should be conductive (leak current: 10M ohm or less).
・ When the Energizer Type E92 AAA LR03 is used, the ambient temperature
range is -18 to +50 C.
・ The enclosure of this detector uses ABS resin. Avoid exposure to organic
solvents, strong acids, strong alkalis and mineral oils. Exposure may
com
p
romise the ex
p
losion-
p
roof structure of the detector.
WARNING
NOTE
DANGER
WARNING
CAUTION

- 6 -
2. Unit Dimensions and Components
Multi-gas Detector
Item Component Description/Function
1 POWER button Used for turning on/off the unit or setting.
2 AIR ADJ. button Used for starting automatic air adjustment, muting audio
alarm, or making settings.
3 Speaker opening Opening for audio.
4 Alarm lights (red) (5 places) Flash when an alarm activates (when target gases are
detected).
5 Infrared port Used for data logging.
6 LCD Displays gas concentrations and settings.
7 Sensor cover For firmly attaching the sensors and filter elements.
8 Gas detection ports (4 places)
(with filter elements)
Gas inlets to the sensor. Filter elements are installed for
preventing the entry of dust/water through the inlets.
9 Battery cover Open/close this cover for battery replacement.
10 Battery unit Used to house a battery and related circuit.
11 Mounting screws Used to attach the safety pin strap to the unit.
12 Manufacturing number sticker Indicates model, serial number and manufacturing date.
13 Explosion-proof sticker Indicates type of protection, certification number and
temperature requirement.
14 Battery case manufacturing
number sticker Indicates model, serial number, and manufacturing date.
15 CE sticker Indicates CE marking and QAN notified body number.
16 Battery case warning sticker
(BP-4000llAL or BP-4000llMH) Indicates warning.
17 Charging terminal
▲
MENU
- 5 -
CAUTION
If this product is to be unused or stored for an extended period of
time, the battery must be removed. Leaving the battery inside
while the product is unused or stored for an expected period of
time will drain the battery and cause it to leak, which will lead to
product failure.
This product is an intrinsically safe device. Do not disassemble,
modify, or alter the structure of this unit or its electrical circuits.
Doing so may impair the performance of the explosion-proof
characteristics.
Do not leave the product in high temperature and/or high humidity
conditions for a long period of time. Doing so may impair the
performance of the product.
Avoid using the product outside the specified operating
temperature/humidity range. Also avoid exposing the product to
abrupt temperature/humidity changes. Failure to do so may impair
the performance of the product.
Avoid rapid changes in pressure. Failure to do so may impair the
sensor performance or may damage the sensors.
Avoid strong mechanical shock, impact or vibration to the product
by dropping or bumping. Failure to do so may impair the
performance of the product.
If you drop or bump the product by mistake then the reading
fluctuates, allow enough time to stabilize the reading before use.
If condensation is present on the product, remove it and make
sure the unit is completely dried and checked for abnormalities
before use.
This detector may detect gases or solvent vapors that are not
target gases. Keep the environment you are using the detector
into consideration.
Do not use the product in a place or near a place where silicone
sealant/vapor may be present. Doing so may compromise the
performance of the product.
Detecting a high concentration of sulfur dioxide or chlorine may
shorten the sensor life or increase errors.
Detecting hydrogen sulfide for an extended period of time may
shorten the sensor life and impair the sensor sensitivity.
Because the oxygen sensor has pressure dependence. Make
necessary pressure adjustments when using the detector at a
place other than sea-level, such as at high altitude.
The gas sensors contain harmful substances. For disposal, return
them to New Cosmos or treat them as industrial waste.
When used at low temperature, the battery life will be shorter than
when used at room temperature due to battery’s characteristics.
Keep the detector away from wireless devices while in use.
Failure to do so may cause a fault alarm or fluctuations in the
reading due to radio wave interference.
The vibrating alarm may be difficult to feel depending on the
location where it is worn.

- 6 -
2. Unit Dimensions and Components
Multi-gas Detector
Item Component Description/Function
1 POWER button Used for turning on/off the unit or setting.
2 AIR ADJ. button Used for starting automatic air adjustment, muting audio
alarm, or making settings.
3 Speaker opening Opening for audio.
4 Alarm lights (red) (5 places) Flash when an alarm activates (when target gases are
detected).
5 Infrared port Used for data logging.
6 LCD Displays gas concentrations and settings.
7 Sensor cover For firmly attaching the sensors and filter elements.
8 Gas detection ports (4 places)
(with filter elements)
Gas inlets to the sensor. Filter elements are installed for
preventing the entry of dust/water through the inlets.
9 Battery cover Open/close this cover for battery replacement.
10 Battery unit Used to house a battery and related circuit.
11 Mounting screws Used to attach the safety pin strap to the unit.
12 Manufacturing number sticker Indicates model, serial number and manufacturing date.
13 Explosion-proof sticker Indicates type of protection, certification number and
temperature requirement.
14 Battery case manufacturing
number sticker Indicates model, serial number, and manufacturing date.
15 CE sticker Indicates CE marking and QAN notified body number.
16 Battery case warning sticker
(BP-4000llAL or BP-4000llMH) Indicates warning.
17 Charging terminal
▲
MENU
- 5 -
CAUTION
If this product is to be unused or stored for an extended period of
time, the battery must be removed. Leaving the battery inside
while the product is unused or stored for an expected period of
time will drain the battery and cause it to leak, which will lead to
product failure.
This product is an intrinsically safe device. Do not disassemble,
modify, or alter the structure of this unit or its electrical circuits.
Doing so may impair the performance of the explosion-proof
characteristics.
Do not leave the product in high temperature and/or high humidity
conditions for a long period of time. Doing so may impair the
performance of the product.
Avoid using the product outside the specified operating
temperature/humidity range. Also avoid exposing the product to
abrupt temperature/humidity changes. Failure to do so may impair
the performance of the product.
Avoid rapid changes in pressure. Failure to do so may impair the
sensor performance or may damage the sensors.
Avoid strong mechanical shock, impact or vibration to the product
by dropping or bumping. Failure to do so may impair the
performance of the product.
If you drop or bump the product by mistake then the reading
fluctuates, allow enough time to stabilize the reading before use.
If condensation is present on the product, remove it and make
sure the unit is completely dried and checked for abnormalities
before use.
This detector may detect gases or solvent vapors that are not
target gases. Keep the environment you are using the detector
into consideration.
Do not use the product in a place or near a place where silicone
sealant/vapor may be present. Doing so may compromise the
performance of the product.
Detecting a high concentration of sulfur dioxide or chlorine may
shorten the sensor life or increase errors.
Detecting hydrogen sulfide for an extended period of time may
shorten the sensor life and impair the sensor sensitivity.
Because the oxygen sensor has pressure dependence. Make
necessary pressure adjustments when using the detector at a
place other than sea-level, such as at high altitude.
The gas sensors contain harmful substances. For disposal, return
them to New Cosmos or treat them as industrial waste.
When used at low temperature, the battery life will be shorter than
when used at room temperature due to battery’s characteristics.
Keep the detector away from wireless devices while in use.
Failure to do so may cause a fault alarm or fluctuations in the
reading due to radio wave interference.
The vibrating alarm may be difficult to feel depending on the
location where it is worn.

- 8 -
3. Operation
3-1. Before Use
3-1-1. Battery Installation
Install the supplied battery. (Page 28 “Battery Replacement”)
The battery cover is not pre-installed in the detector but included in the packing box
during shipment.
3-1-2. Safety Pin Strap Installation
1) Attach the bottom edge of the safety pin strap to the back of the unit by installing the
two supplied mounting screws. Note the direction of the safety pin clasp.
2) Roll up the safety pin strap and attach it to the upper part of the unit by installing the
two supplied mounting screws as shown below.
The safety pin may leave a tiny hole in clothes.
NOTE
Only use the supplied screws (M2.6 x 4, truss head).
Use a screwdriver with point size 1 (see page 33 for the shape).
Be careful not to prick your finger with the safety pin.
CAUTION
Align the clasp
of safety pin with
the battery cover
side.
Mounting screws (2 places)
Safety pin strap
Battery cove
r
Do not cover any gas detection ports with any fabric, etc. If blocked,
correct detection is not possible.
WARNING
Mounting screws (2 places)
- 7 -
LCD Indication
Item Icon/Display Ref.
1 Concentration values and information -
2 Gas type Page 11
3 2nd stage alarm icon Page 12
4 1st stage alarm icon
5 Unit of measurement -
6 Battery level indicator Page 28
7 Alarm volume indicator Page 21
8 Audio mute icon Page 20
9 Peak hold icon Page 14
10 Battery saving mode icon Page 23
11 Set contents -
12 Celsius/Fahrenheit Page 15
13 Operation of combustible gas sensor -
2
3
4
5
1
6 7 8 9 10 12 13 11

- 8 -
3. Operation
3-1. Before Use
3-1-1. Battery Installation
Install the supplied battery. (Page 28 “Battery Replacement”)
The battery cover is not pre-installed in the detector but included in the packing box
during shipment.
3-1-2. Safety Pin Strap Installation
1) Attach the bottom edge of the safety pin strap to the back of the unit by installing the
two supplied mounting screws. Note the direction of the safety pin clasp.
2) Roll up the safety pin strap and attach it to the upper part of the unit by installing the
two supplied mounting screws as shown below.
The safety pin may leave a tiny hole in clothes.
NOTE
Only use the supplied screws (M2.6 x 4, truss head).
Use a screwdriver with point size 1 (see page 33 for the shape).
Be careful not to prick your finger with the safety pin.
CAUTION
Align the clasp
of safety pin with
the battery cover
side.
Mounting screws (2 places)
Safety pin strap
Battery cove
r
Do not cover any gas detection ports with any fabric, etc. If blocked,
correct detection is not possible.
WARNING
Mounting screws (2 places)
- 7 -
LCD Indication
Item Icon/Display Ref.
1 Concentration values and information -
2 Gas type Page 11
3 2nd stage alarm icon Page 12
4 1st stage alarm icon
5 Unit of measurement -
6 Battery level indicator Page 28
7 Alarm volume indicator Page 21
8 Audio mute icon Page 20
9 Peak hold icon Page 14
10 Battery saving mode icon Page 23
11 Set contents -
12 Celsius/Fahrenheit Page 15
13 Operation of combustible gas sensor -
2
3
4
5
1
6 7 8 9 10 12 13 11

- 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 (O2,
Methane, H2S 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>, <1st stage alarm set values>,
<2nd 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><1ststage alarm set values><2ndstage 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

- 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 (O2,
Methane, H2S 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>, <1st stage alarm set values>,
<2nd 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><1ststage alarm set values><2ndstage 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

- 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 1st stage alarm 2nd 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 ▲
1st stage alarm for
combustible gas
(Example)
2nd 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)

- 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 1st stage alarm 2nd 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 ▲
1st stage alarm for
combustible gas
(Example)
2nd 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)

- 14 -
3-3. Normal Operation Functions
This section describes functions which are available during normal operation thru button
operation. “Normal operation” is a status in which the detector is capable of gas
monitoring/detection after powering-up, and normally the <gas concentrations> screen is
displayed on the LCD.
3-3-1. Air Adjustment (Zeroing) (21.0 vol% adjustment for Oxygen)
During normal operation, press and hold the [ AIR ADJ.] button for 3 seconds to start air
adjustment.
--> The unit will beep 3 times and [ADJ] will be displayed for each target gas for 3
seconds. When the air adjustment is completed, [21.0vol%], [0%LEL] or [0ppm] will
be displayed for each corresponding gas.
3-3-2. Peak Hold
1) During normal operation, press the [ POWER] and [ AIR ADJ.] buttons
simultaneously to activate the peak hold function.
--> The unit will beep once, the PEAK icon will appear at the
bottom of the LCD. If a highest concentration (lowest for
oxygen) is detected, it will replace the current peak value. The
new peak value will be maintained on the LCD until exceeded.
2) To deactivate the peak hold function, press the [ POWER] and [ AIR ADJ.]
buttons simultaneously.
--> The unit will beep once, the PEAK icon will disappear, the peak value will be
reset, the LCD will then return to the <gas concentrations> screen.
Air adjustment completed
Perform air adjustment (zeroing) in clean air. Inaccurate gas
concentrations will be indicated if air adjustment has been done
in a gas atmosphere.
During normal operation, the unit keeps monitoring the gas
concentrations even when the <gas concentrations> screen is not
displayed on the LCD and an alarm will activate when any of the gas
concentrations reach the alarm set value.
NOTE
MENU
MENU
The peak hold function will be canceled each time the unit is turned off.
Once the peak hold function is activated, the new peak value will be updated
and maintained on the LCD even if the actual gas concentration falls below
that value.
NOTE
WARNING
▲
▲
▲
Air adjustment
in
p
ro
g
ress
Peak hold
When proper air adjustment is not available (e.g. when the actual
concentration exceeds the alarm set value), [ADJ] will not be
displayed and the concentration value will remain displayed for this
gas, even after the [ AIR ADJ.] button is pressed for 3 seconds.
NOTE
▲
O2drifts to 21.2%
- 13 -
TWA Alarm
For hydrogen sulfide (H2S) and carbon monoxide (CO), the gas concentration average
is calculated every minute. These averages are integrated and updated every minute
while the detector is on. If the integrated value exceeds the integrated alarm set value
(see below for how to obtain the integrated alarm set values), a TWA alarm will activate
and the flashing alert will be shown in the bottom right corner of the LCD.
[Integrated alarm set values]
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) = 12,000 ppm
STEL Alarm
For hydrogen sulfide (H2S) and carbon monoxide (CO), the gas concentration average
is calculated every minute. If the average during the last 15 minutes (15 samplings)
exceeds the STEL alarm set value (15 ppm for H2S and 300 ppm for CO), a STEL alarm
will activate and the flashing alert will be shown in the bottom right corner of the LCD.
DANGER
TWA alarm will not be cancelled until the detector is turned off.
NOTE
STEL alarm will not be cancelled unless the average during the last 15
minutes falls below the STEL alarm set value or the detector is turned off.
NOTE
When a gas alarm activates, immediately take all the necessary
measures to prevent an explosion.
Flashin
g
Flashing
(H2S) Flashing (CO and H2S)(CO)
Flashing
(CO) (H2S)
Flashing
(CO and H2S)
Flashing

- 14 -
3-3. Normal Operation Functions
This section describes functions which are available during normal operation thru button
operation. “Normal operation” is a status in which the detector is capable of gas
monitoring/detection after powering-up, and normally the <gas concentrations> screen is
displayed on the LCD.
3-3-1. Air Adjustment (Zeroing) (21.0 vol% adjustment for Oxygen)
During normal operation, press and hold the [ AIR ADJ.] button for 3 seconds to start air
adjustment.
--> The unit will beep 3 times and [ADJ] will be displayed for each target gas for 3
seconds. When the air adjustment is completed, [21.0vol%], [0%LEL] or [0ppm] will
be displayed for each corresponding gas.
3-3-2. Peak Hold
1) During normal operation, press the [ POWER] and [ AIR ADJ.] buttons
simultaneously to activate the peak hold function.
--> The unit will beep once, the PEAK icon will appear at the
bottom of the LCD. If a highest concentration (lowest for
oxygen) is detected, it will replace the current peak value. The
new peak value will be maintained on the LCD until exceeded.
2) To deactivate the peak hold function, press the [ POWER] and [ AIR ADJ.]
buttons simultaneously.
--> The unit will beep once, the PEAK icon will disappear, the peak value will be
reset, the LCD will then return to the <gas concentrations> screen.
Air adjustment completed
Perform air adjustment (zeroing) in clean air. Inaccurate gas
concentrations will be indicated if air adjustment has been done
in a gas atmosphere.
During normal operation, the unit keeps monitoring the gas
concentrations even when the <gas concentrations> screen is not
displayed on the LCD and an alarm will activate when any of the gas
concentrations reach the alarm set value.
NOTE
MENU
MENU
The peak hold function will be canceled each time the unit is turned off.
Once the peak hold function is activated, the new peak value will be updated
and maintained on the LCD even if the actual gas concentration falls below
that value.
NOTE
WARNING
▲
▲
▲
Air adjustment
in
p
ro
g
ress
Peak hold
When proper air adjustment is not available (e.g. when the actual
concentration exceeds the alarm set value), [ADJ] will not be
displayed and the concentration value will remain displayed for this
gas, even after the [ AIR ADJ.] button is pressed for 3 seconds.
NOTE
▲
O2drifts to 21.2%
- 13 -
TWA Alarm
For hydrogen sulfide (H2S) and carbon monoxide (CO), the gas concentration average
is calculated every minute. These averages are integrated and updated every minute
while the detector is on. If the integrated value exceeds the integrated alarm set value
(see below for how to obtain the integrated alarm set values), a TWA alarm will activate
and the flashing alert will be shown in the bottom right corner of the LCD.
[Integrated alarm set values]
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) = 12,000 ppm
STEL Alarm
For hydrogen sulfide (H2S) and carbon monoxide (CO), the gas concentration average
is calculated every minute. If the average during the last 15 minutes (15 samplings)
exceeds the STEL alarm set value (15 ppm for H2S and 300 ppm for CO), a STEL alarm
will activate and the flashing alert will be shown in the bottom right corner of the LCD.
DANGER
TWA alarm will not be cancelled until the detector is turned off.
NOTE
STEL alarm will not be cancelled unless the average during the last 15
minutes falls below the STEL alarm set value or the detector is turned off.
NOTE
When a gas alarm activates, immediately take all the necessary
measures to prevent an explosion.
Flashin
g
Flashing
(H2S) Flashing (CO and H2S)(CO)
Flashing
(CO) (H2S)
Flashing
(CO and H2S)
Flashing

- 16 -
3-4. User Mode
User mode is used to perform an alarm test, make settings (audio on/off, audio volume,
clock adjustment, and battery saving mode on/off) and perform data logging.
3-4-1. Select User Mode
During normal operation, press the [ POWER] button for a second.
--> After the unit beeps once, the user mode will start with “AL TEST” (alarm test)
displayed on the LCD.
3-4-2. Change Mode
During user mode, press the [ AIR ADJ.] button once.
--> Continue pressing the button to cycle through the following modes: [AL TEST]
(alarm test), [SET UP] (settings), and [LOG] (logging).
While the desired mode name is displayed, press the [ POWER] and [ AIR
ADJ.] buttons simultaneously to select that mode.
--> After the unit beeps once, the selected mode will start.
(See the next page for the functions and setting of each mode.)
The LCD will automatically return to the <gas concentrations> screen, if the
unit is left idle during user mode for one minute.
NOTE
MENU
MENU
Gas detection is not possible during user mode.
The set details in the user mode will be saved even after the
unit is turned off or the battery is removed.
WARNING
▲
▲
<Gas concentrations>
▲▲▲
<Alarm test> <Logging>
<Settings>
･Audio on/off
･Audio volume
･Clock adjustment
･Battery saving mode
- 15 -
3-3-3. Backlight
The LCD backlight will automatically turn on when a gas alarm goes off, then it will
automatically turn off when the gas alarm is cleared.
Pressing the [ POWER] or [ AIR ADJ.] button also turns on the backlight,
which will automatically turn off 5 seconds later.
3-3-4. Mute Audio (Buzzer Stop)
Press the [ AIR ADJ.] (BZ,STOP) button to silence the audio alarm when a gas
alarm is active, when an error occurs, or when the battery is empty.
3-3-5. Display Alarm Set Values
During normal operation, press the [ AIR ADJ.] button to show the alarm set
values.
--> <Full scale values>, <1st stage alarm set values>, <2nd stage alarm set values>,
<TWA alarm set values>, and <STEL alarm set values> screens will be displayed
on the LCD in sequence for 2 seconds each, then the LCD will return to the <gas
concentrations> screen.
3-3-6. Display Date/Time/Temperature
During normal operation, press and hold the [ POWER] and [ AIR ADJ.]
buttons simultaneously for 3 seconds.
--> Date, time and temperature will be displayed on the LCD for 5 seconds, the LCD
will then return to the <gas concentrations> screen automatically.
MENU
MENU
▲
▲
▲
▲
Contact your New Cosmos representative for changing the alarm set values.
NOTE
For the year, the last two digits of the year
are displayed on the LCD, e.g. “15” is
displayed for the year 2015.
A temperature sensor is built in the
detector, use the displayed temperature
for reference.
NOTE
<STEL alarm set values>
<2nd stage alarm set values><Full scale values> <1st stage alarm set values>
<TWA alarm set values>
<Gas concentrations>
(Normal operation)
Year Month Day
Temperature Time
<Date/time/temperature>

- 16 -
3-4. User Mode
User mode is used to perform an alarm test, make settings (audio on/off, audio volume,
clock adjustment, and battery saving mode on/off) and perform data logging.
3-4-1. Select User Mode
During normal operation, press the [ POWER] button for a second.
--> After the unit beeps once, the user mode will start with “AL TEST” (alarm test)
displayed on the LCD.
3-4-2. Change Mode
During user mode, press the [ AIR ADJ.] button once.
--> Continue pressing the button to cycle through the following modes: [AL TEST]
(alarm test), [SET UP] (settings), and [LOG] (logging).
While the desired mode name is displayed, press the [ POWER] and [ AIR
ADJ.] buttons simultaneously to select that mode.
--> After the unit beeps once, the selected mode will start.
(See the next page for the functions and setting of each mode.)
The LCD will automatically return to the <gas concentrations> screen, if the
unit is left idle during user mode for one minute.
NOTE
MENU
MENU
Gas detection is not possible during user mode.
The set details in the user mode will be saved even after the
unit is turned off or the battery is removed.
WARNING
▲
▲
<Gas concentrations>
▲▲▲
<Alarm test> <Logging>
<Settings>
･Audio on/off
･Audio volume
･Clock adjustment
･Battery saving mode
- 15 -
3-3-3. Backlight
The LCD backlight will automatically turn on when a gas alarm goes off, then it will
automatically turn off when the gas alarm is cleared.
Pressing the [ POWER] or [ AIR ADJ.] button also turns on the backlight,
which will automatically turn off 5 seconds later.
3-3-4. Mute Audio (Buzzer Stop)
Press the [ AIR ADJ.] (BZ,STOP) button to silence the audio alarm when a gas
alarm is active, when an error occurs, or when the battery is empty.
3-3-5. Display Alarm Set Values
During normal operation, press the [ AIR ADJ.] button to show the alarm set
values.
--> <Full scale values>, <1st stage alarm set values>, <2nd stage alarm set values>,
<TWA alarm set values>, and <STEL alarm set values> screens will be displayed
on the LCD in sequence for 2 seconds each, then the LCD will return to the <gas
concentrations> screen.
3-3-6. Display Date/Time/Temperature
During normal operation, press and hold the [ POWER] and [ AIR ADJ.]
buttons simultaneously for 3 seconds.
--> Date, time and temperature will be displayed on the LCD for 5 seconds, the LCD
will then return to the <gas concentrations> screen automatically.
MENU
MENU
▲
▲
▲
▲
Contact your New Cosmos representative for changing the alarm set values.
NOTE
For the year, the last two digits of the year
are displayed on the LCD, e.g. “15” is
displayed for the year 2015.
A temperature sensor is built in the
detector, use the displayed temperature
for reference.
NOTE
<STEL alarm set values>
<2nd stage alarm set values><Full scale values> <1st stage alarm set values>
<TWA alarm set values>
<Gas concentrations>
(Normal operation)
Year Month Day
Temperature Time
<Date/time/temperature>

- 18 -
3-4-4. Operating Procedure
Operating procedure for each button is described below.
Select: Press the [ AIR ADJ.] button for one
second. (Press the button to cycle through
the options)
Confirm: Press the [ AIR ADJ.] and [ POWER]
buttons simultaneously.
Return: Press the [ POWER] button.
(Each press of the button will return to the
previous screen.)
Reverse sequence: Press and hold the [ AIR ADJ.] and [ POWER] buttons
simultaneously for 3 seconds.
(A) Alarm Test
Enter the user mode (page 16), and take the following steps.
1) While [AL TEST] is displayed, press the [ AIR
ADJ.] and [ POWER] buttons simultaneously.
--> [AL1] (1st stage alarm) will be displayed (selected).
2) To select [AL2] (2nd stage alarm), press the [ AIR
ADJ.] button.
--> [AL2] (2nd stage alarm) will be displayed (selected).
3) To confirm the selection, [AL1] or [AL2], press the
[ AIR ADJ.] and [ POWER] buttons
simultaneously.
--> The selected alarm test will be started and the
current alarm volume will be displayed.
MENU
MENU
MENU
<1st stage alarm>
MENU
<2nd stage alarm>
MENU
(2nd stage alarm)
(1st stage alarm)
▲
▲
▲
▲
▲
▲
▲MENU
How to reverse the display sequence
Press and hold the [ AIR ADJ.] and [ POWER]
buttons simultaneously to reverse the display sequence.
After one beep, the arrow icon in the bottom right corner of
the LCD will flip vertical.
The same operation reverses the display sequence again.
The sequence returns to the default (upward arrow ) if
the unit is turned off.
NOTE
MENU
Downward
arrow
▲
- 17 -
* Battery saving mode is set to “ON” by default when shipped out. If the battery saving mode is
set to “OFF”, the detection cycle of the combustible gas sensor and the response time will be
shortened, resulting in halving the battery life.
* A personal computer and a data logger kit (sold separately) are required to read out logging
data. See the data logger kit’s instruction manual for read-out procedure.
3-4-3. Exit Mode
While navigating in the user mode, press the [ POWER] button to return to the
previous step.
To exit the user mode, press the [ POWER] button repeatedly until the LCD
returns to the <gas concentrations> screen.
Mode Functions and setting Reference
Alarm test
[AL TEST]
Operation test for 1st/ 2nd stage alarm lights, buzzer, and vibration.
Additionally, the alarm volume can be adjusted. Page 18
Setting
[SET UP]
Audio on/off Set audio to on/off for alarm and button
operation. Page 20
Audio volume control Adjust the volume level for alarm
sound and button tone. Page 21
Clock adjustment Set the date and time. Page 22
Battery saving mode *
Set the battery saving mode to on/off
by switching the detection interval of
combustible gas sensor.
Page 23
Logging
[LOG]
Logging of detection data (time, gas concentration and
temperature) at a preset interval.
This mode allows the following operations.
Start and stop logging
Delete logging data
Set logging interval rate
Upload logging data
Pages 24
to 26
MENU
MENU
Return from AL1 test screen to gas concentrations screen
MENU MENU MENU
<Gas concentrations>