New Cosmos Electric XP-302M-R-A-1 User manual

Multi-gas Detector
Instruction Manual
Model designation
This instruction manual applies to the six models listed to the left.
Keep this manual for easy reference.
Carefully read this manual prior to use.
Note: Refer to page 2 for information on explosive-proof application.
XP-302M-RET(00)
Jul
y
2018
XP-302M-R-A/B/C-1/2
A/B/C denotes target gases
A: Oxygen (O2), combustible gas (COMB),
hydrogen sulfide (H2S), and carbon monoxide (CO)
B: Oxygen (O2), combustible gas (COMB), and
hydrogen sulfide (H2S)
C: Oxygen (O2), combustible gas (COMB),
and carbon monoxide (CO)
1/2 denotes accessory
1: Gas sampling tube (1m) with probe nozzle
2: Gas sam
p
lin
g
tube
(
8m
)
with sam
p
lin
g
float
■ XP-302M-R -A-1
■ XP-302M-R -B-1
■ XP-302M-R -C-1
■ XP-302M-R -A-2
■ XP-302M-R -B-2
■ XP-302M-R -C-2

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)
*To use the XP302ML data logger kit, a Windows personal computer is required.
For compatible Windows versions and hardware requirements, contact New
Cosmos or its representative or refer to the XP302ML’s instruction manual.
XP-302M-R multi-gas portable suction type detector
with carry case and shoulder strap
(Refer to Model designation on cover page.)
1
For XP-302M-R-A/B/C-1,
Gas sampling tube (1m) with drain filter and probe nozzle
For XP-302M-R-A/B/C-2,
Gas sampling tube (8m) with sampling float and storage case
1
For XP-302M-R-A/B/C-1,
Replacement filter elements (FE-2) x 2pcs
For XP-302M-R-A/B/C-2,
Replacement filter elements (FE-2) x 10pcs
(Pre-installed in a pocket holder on the carry case’s rear.)
1
Panasonic alkaline AA battery (LR6) 4
Instruction manual (this document) 1
Inspection certificate 1
Alarm unit (AL-302M-R-8)
with communication cable (8m) 1
Data logger kit (XP302ML) *
with software (CD-R) and USB cable (1.8m) 1
AC adaptor (AD-1)
100-240 VAC, 50/60 Hz
(For use in a non-hazardous area)
1
Table of Contents
Package Contents 1
1. Introduction 2
Explosion-proof Requirements 2
Symbols Used in this Manual 3
Safety Precautions 3
2. Unit Dimensions and Components 5
Exterior appearance 5
Optional alarm unit 8
3. Operation 9
Carry Case Usage 9
Preparation 10
Operation Procedure 12
Gas Concentrations Screen 14
Gas Alarm 15
Peak Hold 16
Automatic Backlight and Backlight Timeout 16
Functions and Settings 17
Functions and Settings: Alarm Test 18
Functions and Settings: Data Logging 19
Functions and Settings: Alarm Set Values 24
Functions and Settings: Clock 25
Functions and Settings: O2 Mode Setting 26
Functions and Settings: Volume/Mute 27
Functions and Settings: LCD Contrast 29
Functions and Settings: Display 30
Functions and Settings: Safety Lock 31
4. Notifications/Error Messages on Display 34
5. Consumable Replacement 35
Filter Element Replacement 35
Battery Replacement 38
Battery Replacement for Optional Alarm Unit 38
6. Maintenance 39
Routine Check 39
Annual/Semiannual Inspection 40
Spare Parts 40
7. Troubleshooting 41
8. Warranty 42
9. Specifications 43
Explosion proof specifications 45
10. Detection Principle 46
11. Glossary 47

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)
*To use the XP302ML data logger kit, a Windows personal computer is required.
For compatible Windows versions and hardware requirements, contact New
Cosmos or its representative or refer to the XP302ML’s instruction manual.
XP-302M-R multi-gas portable suction type detector
with carry case and shoulder strap
(Refer to Model designation on cover page.)
1
For XP-302M-R-A/B/C-1,
Gas sampling tube (1m) with drain filter and probe nozzle
For XP-302M-R-A/B/C-2,
Gas sampling tube (8m) with sampling float and storage case
1
For XP-302M-R-A/B/C-1,
Replacement filter elements (FE-2) x 2pcs
For XP-302M-R-A/B/C-2,
Replacement filter elements (FE-2) x 10pcs
(Pre-installed in a pocket holder on the carry case’s rear.)
1
Panasonic alkaline AA battery (LR6) 4
Instruction manual (this document) 1
Inspection certificate 1
Alarm unit (AL-302M-R-8)
with communication cable (8m) 1
Data logger kit (XP302ML) *
with software (CD-R) and USB cable (1.8m) 1
AC adaptor (AD-1)
100-240 VAC, 50/60 Hz
(For use in a non-hazardous area)
1
Table of Contents
Package Contents 1
1. Introduction 2
Explosion-proof Requirements 2
Symbols Used in this Manual 3
Safety Precautions 3
2. Unit Dimensions and Components 5
Exterior appearance 5
Optional alarm unit 8
3. Operation 9
Carry Case Usage 9
Preparation 10
Operation Procedure 12
Gas Concentrations Screen 14
Gas Alarm 15
Peak Hold 16
Automatic Backlight and Backlight Timeout 16
Functions and Settings 17
Functions and Settings: Alarm Test 18
Functions and Settings: Data Logging 19
Functions and Settings: Alarm Set Values 24
Functions and Settings: Clock 25
Functions and Settings: O2 Mode Setting 26
Functions and Settings: Volume/Mute 27
Functions and Settings: LCD Contrast 29
Functions and Settings: Display 30
Functions and Settings: Safety Lock 31
4. Notifications/Error Messages on Display 34
5. Consumable Replacement 35
Filter Element Replacement 35
Battery Replacement 38
Battery Replacement for Optional Alarm Unit 38
6. Maintenance 39
Routine Check 39
Annual/Semiannual Inspection 40
Spare Parts 40
7. Troubleshooting 41
8. Warranty 42
9. Specifications 43
Explosion proof specifications 45
10. Detection Principle 46
11. Glossary 47

3
1. Introduction
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.
DANGER Indicates an imminently hazardous situation that can result in death
or serious injury.
WARNING Indicates a potentially hazardous situation that may result in death
or serious injury.
CAUTION Indicates a hazardous situation that may result in minor injury or
property damage.
Provides advice/information on product handling.
Safety Precautions
Carefully read this manual prior to use.
Follow the precautions below to ensure safe operation.
DANGER When a gas alarm activates, immediately take all the necessary
measures to prevent an explosion.
NOTE
Zero 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 measurements being displayed.
Do not block any gas inlet and outlet. If blocked, accurate detection
is not possible.
Keep the filter elements at the drain filter clean and dry. If the filter
elements are dirty or wet, proper gas detection is not possible.
The recommended sensor replacement cycle is one year. After the
one year period the sensor may fail to provide accurate detection.
When the alarm unit detects an abnormality (e.g. not being
connected with the detector), its green operation light flashes.
When there is a communication error with the detector, the alarm
unit repeatedly beeps twice for 5 minutes then ceases operation.
When the battery is drained, the alarm unit gives a steady tone for
5 minutes then ceases operation.
Do not block the speaker. If blocked, the audible alarm will be
muffled.
Only use the specified batteries to maintain the product’s
intrinsically safe characteristics (page 38 “Battery Replacement”).
This product is safety equipment. Perform a routine check before
use (page 39 “Routine Check”).
WARNING
2
1. Introduction
Thank you for purchasing the New Cosmos multi-gas detector XP-302M-R series. Prior to use,
please read this instruction manual to ensure safe and reliable operation, and to prevent accidents.
This gas detector can measure 3 or 4 gases, such as oxygen (O2), combustible gas (COMB),
hydrogen sulfide (H2S) and carbon monoxide (CO) while simultaneously displaying all gas
concentrations. If gas concentrations reach a preset level, the detector alerts the user via audible
and visual 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
product for other than the intended purpose or in a manner not described in this manual.
Explosion-proof Requirements
Follow the conditions below to comply with the explosion-proof requirements.
Gas detector
Explosion proof: Ex ibd IIB T3 X
Power source: 3.0 VDC, 0.35 A (Panasonic alkalin battery, LR6, 1.5 V x 4 pcs)
2.5 VDC, 0.13A for combustible gas sensor
Operating temperature: -20 to 40ºC
Conditions of use
・ Do not replace the batteries in a hazardous area.
・ Only use the detector while installed in its dedicated carry case.
・ Do not use the USB or AC adaptor in a hazadous area.
・ To prevent accidents from electrostatic charges, wear anti-static clothing, conductive
footwear (antistatic work shoes), and have a conductive work floor (resistance: 10M
Ohm or less).
・ Do not use this product for measuring the oxygen concentration other than in a mixture
of air and conbustible gas, or in a mixture of vapor and toxic gas.
Optional alarm unit
Explosion proof: Ex ib IIB T3
Power source: 3.0 VDC, 0.2 A (Panasonic alkalin battery, LR6, 1.5 V x 2 pcs)
Operating temperature: -20 to 40ºC
Conditions of use
・ Do not replace the batteries in a hazardous area.
・ Only use the alarm unit while installed in its dedicated protective case.
・ Do not use the USB or AC adaptor in a hazadous area.
・ To prevent accidents from electrostatic charges, wear anti-static clothing, conductive
footwear (antistatic work shoes), and have a conductive work floor (resistance: 10M
Ohm or less).

3
1. Introduction
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.
DANGER Indicates an imminently hazardous situation that can result in death
or serious injury.
WARNING Indicates a potentially hazardous situation that may result in death
or serious injury.
CAUTION Indicates a hazardous situation that may result in minor injury or
property damage.
Provides advice/information on product handling.
Safety Precautions
Carefully read this manual prior to use.
Follow the precautions below to ensure safe operation.
DANGER When a gas alarm activates, immediately take all the necessary
measures to prevent an explosion.
NOTE
Zero 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 measurements being displayed.
Do not block any gas inlet and outlet. If blocked, accurate detection
is not possible.
Keep the filter elements at the drain filter clean and dry. If the filter
elements are dirty or wet, proper gas detection is not possible.
The recommended sensor replacement cycle is one year. After the
one year period the sensor may fail to provide accurate detection.
When the alarm unit detects an abnormality (e.g. not being
connected with the detector), its green operation light flashes.
When there is a communication error with the detector, the alarm
unit repeatedly beeps twice for 5 minutes then ceases operation.
When the battery is drained, the alarm unit gives a steady tone for
5 minutes then ceases operation.
Do not block the speaker. If blocked, the audible alarm will be
muffled.
Only use the specified batteries to maintain the product’s
intrinsically safe characteristics (page 38 “Battery Replacement”).
This product is safety equipment. Perform a routine check before
use (page 39 “Routine Check”).
WARNING
2
1. Introduction
Thank you for purchasing the New Cosmos multi-gas detector XP-302M-R series. Prior to use,
please read this instruction manual to ensure safe and reliable operation, and to prevent accidents.
This gas detector can measure 3 or 4 gases, such as oxygen (O2), combustible gas (COMB),
hydrogen sulfide (H2S) and carbon monoxide (CO) while simultaneously displaying all gas
concentrations. If gas concentrations reach a preset level, the detector alerts the user via audible
and visual 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
product for other than the intended purpose or in a manner not described in this manual.
Explosion-proof Requirements
Follow the conditions below to comply with the explosion-proof requirements.
Gas detector
Explosion proof: Ex ibd IIB T3 X
Power source: 3.0 VDC, 0.35 A (Panasonic alkalin battery, LR6, 1.5 V x 4 pcs)
2.5 VDC, 0.13A for combustible gas sensor
Operating temperature: -20 to 40ºC
Conditions of use
・ Do not replace the batteries in a hazardous area.
・ Only use the detector while installed in its dedicated carry case.
・ Do not use the USB or AC adaptor in a hazadous area.
・ To prevent accidents from electrostatic charges, wear anti-static clothing, conductive
footwear (antistatic work shoes), and have a conductive work floor (resistance: 10M
Ohm or less).
・ Do not use this product for measuring the oxygen concentration other than in a mixture
of air and conbustible gas, or in a mixture of vapor and toxic gas.
Optional alarm unit
Explosion proof: Ex ib IIB T3
Power source: 3.0 VDC, 0.2 A (Panasonic alkalin battery, LR6, 1.5 V x 2 pcs)
Operating temperature: -20 to 40ºC
Conditions of use
・ Do not replace the batteries in a hazardous area.
・ Only use the alarm unit while installed in its dedicated protective case.
・ Do not use the USB or AC adaptor in a hazadous area.
・ To prevent accidents from electrostatic charges, wear anti-static clothing, conductive
footwear (antistatic work shoes), and have a conductive work floor (resistance: 10M
Ohm or less).

5
2. Unit Dimensions and Components
Exterior appearance
Rear view
Right view
Item Component Description/Function
1 Light sensor
Turns on/off the LCD backlight depending on the
ambient brightness. The backlight is lit while
connected with an optional AC adaptor.
2 BATT. light Flashes when the battery level is low.
3 Sensor unit
Houses up to four gas sensors.
Combustible gas sensor employs a flameproof
enclosure.
4 Alarm light Flashes when a gas alarm activates.
5 Gas outlet Discharges the sampled gas.
6 Speaker Opening for audio.
7 Gas inlet Connects a gas sampling tube.
⑪
⑩⑨
①
②
⑧
⑰
③
⑭
⑮⑯
⑫
⑥
⑬
④
⑤
⑦
4
1. Introduction
If this product is to be unused for an extended period of time, the
battery level must be checked periodically (monthly). Replace the
batteries if the battery level is low. Failure to do so may cause them
to leak, which will lead to product failure.
This product is an intrinsically safe device (combustible gas sensor
employs a flameproof enclosure). 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 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 condensation is present on the product, remove it and make sure
the unit is completely dry 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 in 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 high concentrations of sulfur dioxide or chlorine may
shorten the sensor life or increase errors.
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.
Keep the detector away from wireless devices while in use. Failure
to do so may cause a false alarm or fluctuations in the reading due
to radio wave interference.
The gas sensors contain harmful substances. For disposal, return
them to New Cosmos or treat them as industrial waste.
This product can be considered drip-proof when in its carry case.
However, exposure to water splash is not recommended.
CAUTION

5
2. Unit Dimensions and Components
Exterior appearance
Rear view
Right view
Item Component Description/Function
1 Light sensor
Turns on/off the LCD backlight depending on the
ambient brightness. The backlight is lit while
connected with an optional AC adaptor.
2 BATT. light Flashes when the battery level is low.
3 Sensor unit
Houses up to four gas sensors.
Combustible gas sensor employs a flameproof
enclosure.
4 Alarm light Flashes when a gas alarm activates.
5 Gas outlet Discharges the sampled gas.
6 Speaker Opening for audio.
7 Gas inlet Connects a gas sampling tube.
⑪
⑩⑨
①
②
⑧
⑰
③
⑭
⑮⑯
⑫
⑥
⑬
④
⑤
⑦
4
1. Introduction
If this product is to be unused for an extended period of time, the
battery level must be checked periodically (monthly). Replace the
batteries if the battery level is low. Failure to do so may cause them
to leak, which will lead to product failure.
This product is an intrinsically safe device (combustible gas sensor
employs a flameproof enclosure). 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 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 condensation is present on the product, remove it and make sure
the unit is completely dry 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 in 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 high concentrations of sulfur dioxide or chlorine may
shorten the sensor life or increase errors.
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.
Keep the detector away from wireless devices while in use. Failure
to do so may cause a false alarm or fluctuations in the reading due
to radio wave interference.
The gas sensors contain harmful substances. For disposal, return
them to New Cosmos or treat them as industrial waste.
This product can be considered drip-proof when in its carry case.
However, exposure to water splash is not recommended.
CAUTION

7
2. Unit Dimensions and Components
Gas sampling tube (1m)
Item Component Description/Function
1 Gas sampling tube (1m) Conveys gas to the gas detector.
2 Coupler Connects to the gas detector.
3 Drain filter Prevents water and dust from entering the gas detector, and
houses a filter element (FE-2).
4 Probe nozzle Extension for the gas suction inlet.
Gas sampling tube (8m)
Item Component Description/Function
1 Gas sampling tube (8m) Conveys gas to the gas detector.
2 Coupler (2 places) Connects to the gas detector and sampling float.
3 Sampling float Assembly consists of items 4, 5, and 6.
4 Connection port Connects to the gas sampling tube.
5 Drain filter (2 places) Prevents water and dust from entering the gas detector, and
houses a filter element (FE-2).
6 Float (2 places) Prevents the gas sampling inlet ports from being submerged
under water.
7 Storage case Storage for gas sampling tube and sampling float.
⑦①②
③
⑤
④
⑥
①
③
②④
6
2. Unit Dimensions and Components
Item Component Description/Function
8 Alarm unit connector
with screw cap Connects an optional alarm unit.
9 USB cover Covers the USB cable port.
10 DC jack cover Covers the DC jack.
11 Battery cover For battery replacement.
12
POWER button Turns the unit on/off.
13
ZERO button Performs a zero adjustment.
button Functions as “Enter” key when in the setting mode.
14
DISPLAY button Switches the gas concentrations display format.
▲(Up) button Selects item or increases the parameter value.
15
PEAK button Activates/deactivates the peak hold function.
BZ.STOP button Mutes the alarm sound.
▼(Down) button Selects item or decreases the parameter value.
16
MENU button For settings.
17
LCD Displays gas concentrations, parameter values, and
status messages/icons.
When the AC adapter
is connected, the plug
icon is displayed
a. Battery level
Full ------------------------------------- Empty
(Flashing) (Flashing)
When the AC adaptor is connected to the detector,
battery level and plug icons are alternately displayed.
b. Pump flow rate
High・・・・・・・・・・Low
c. Internal intake temperature
Because the temperature sensor is installed inside the
detector, the unit’s internal intake temperature is
different from the ambient temperature.
d. Time with clock icon
e. Date
a
bcde

7
2. Unit Dimensions and Components
Gas sampling tube (1m)
Item Component Description/Function
1 Gas sampling tube (1m) Conveys gas to the gas detector.
2 Coupler Connects to the gas detector.
3 Drain filter Prevents water and dust from entering the gas detector, and
houses a filter element (FE-2).
4 Probe nozzle Extension for the gas suction inlet.
Gas sampling tube (8m)
Item Component Description/Function
1 Gas sampling tube (8m) Conveys gas to the gas detector.
2 Coupler (2 places) Connects to the gas detector and sampling float.
3 Sampling float Assembly consists of items 4, 5, and 6.
4 Connection port Connects to the gas sampling tube.
5 Drain filter (2 places) Prevents water and dust from entering the gas detector, and
houses a filter element (FE-2).
6 Float (2 places) Prevents the gas sampling inlet ports from being submerged
under water.
7 Storage case Storage for gas sampling tube and sampling float.
⑦①②
③
⑤
④
⑥
①
③
②④
6
2. Unit Dimensions and Components
Item Component Description/Function
8 Alarm unit connector
with screw cap Connects an optional alarm unit.
9 USB cover Covers the USB cable port.
10 DC jack cover Covers the DC jack.
11 Battery cover For battery replacement.
12
POWER button Turns the unit on/off.
13
ZERO button Performs a zero adjustment.
button Functions as “Enter” key when in the setting mode.
14
DISPLAY button Switches the gas concentrations display format.
▲(Up) button Selects item or increases the parameter value.
15
PEAK button Activates/deactivates the peak hold function.
BZ.STOP button Mutes the alarm sound.
▼(Down) button Selects item or decreases the parameter value.
16
MENU button For settings.
17
LCD Displays gas concentrations, parameter values, and
status messages/icons.
When the AC adapter
is connected, the plug
icon is displayed
a. Battery level
Full ------------------------------------- Empty
(Flashing) (Flashing)
When the AC adaptor is connected to the detector,
battery level and plug icons are alternately displayed.
b. Pump flow rate
High・・・・・・・・・・Low
c. Internal intake temperature
Because the temperature sensor is installed inside the
detector, the unit’s internal intake temperature is
different from the ambient temperature.
d. Time with clock icon
e. Date
a
bcde

9
3. Operation
Carry Case Usage
Gas sampling tube and
probe nozzle can be stored
in the pocket holder on the
rear of the carry case.
Gas sampling tube (1m) The gas detector can be
operated with the gas sampling
tube spooled and stored inside
the carry case and the drain filte
r
affixed to the side of case.
The gas detector can be held
horizontally by looping the shoulde
r
strap over the neck and adjusting the
strap.
A
djust the strap
Optional alarm unit can also
be stored in the storage case.
Gas sampling tube (8m) can
be stored in the storage case
for transportation. It is possible
to carry the storage case b
y
looping its strap through the
carry case’s shoulder strap.
Gas sampling tube (8m) Storage case
8
2. Unit Dimensions and Components
Optional alarm unit
Item Component Description/Function
1 Protective case Houses the alarm unit.
2 Green operation light
Indicates the operation status of the alarm unit.
Lit when the alarm unit is on.
Flashing when a gas detector fault or a communication error is
detected, or to notify a battery replacement is needed.
3 Red alarm light
Indicates the alarm status
Flashing indicates gas alarm is present.
Off indicates no gas alarm is present.
4 Speaker
Generates the following warning sounds:
In the event of a gas alarm,
- 1st stage gas alarm: Chirping.
- 2nd stage gas alarm: Rapid chirping (louder siren)
In the event of a device error alarm,
- Gas detector fault/error detected: 2-repeating beeps till
fault/error is cleared.
- Communication error detected: 2-repeating beeps for 5
minutes.
- Replace-battery notification: Pulse-beeps for 10 seconds.
- Battery empty alarm: Steady tone for 5 minutes.
5 Communication
cable (8m) Connects the gas detector to the alarm unit.
6 Connector Connects the communication cable to the gas detector.
⑤
⑥
③
②
①
④

9
3. Operation
Carry Case Usage
Gas sampling tube and
probe nozzle can be stored
in the pocket holder on the
rear of the carry case.
Gas sampling tube (1m) The gas detector can be
operated with the gas sampling
tube spooled and stored inside
the carry case and the drain filte
r
affixed to the side of case.
The gas detector can be held
horizontally by looping the shoulde
r
strap over the neck and adjusting the
strap.
A
djust the strap
Optional alarm unit can also
be stored in the storage case.
Gas sampling tube (8m) can
be stored in the storage case
for transportation. It is possible
to carry the storage case b
y
looping its strap through the
carry case’s shoulder strap.
Gas sampling tube (8m) Storage case
8
2. Unit Dimensions and Components
Optional alarm unit
Item Component Description/Function
1 Protective case Houses the alarm unit.
2 Green operation light
Indicates the operation status of the alarm unit.
Lit when the alarm unit is on.
Flashing when a gas detector fault or a communication error is
detected, or to notify a battery replacement is needed.
3 Red alarm light
Indicates the alarm status
Flashing indicates gas alarm is present.
Off indicates no gas alarm is present.
4 Speaker
Generates the following warning sounds:
In the event of a gas alarm,
- 1st stage gas alarm: Chirping.
- 2nd stage gas alarm: Rapid chirping (louder siren)
In the event of a device error alarm,
- Gas detector fault/error detected: 2-repeating beeps till
fault/error is cleared.
- Communication error detected: 2-repeating beeps for 5
minutes.
- Replace-battery notification: Pulse-beeps for 10 seconds.
- Battery empty alarm: Steady tone for 5 minutes.
5 Communication
cable (8m) Connects the gas detector to the alarm unit.
6 Connector Connects the communication cable to the gas detector.
⑤
⑥
③
②
①
④

11
3. Operation
■ Connect the optional alarm unit
1. Install two batteries (page 38).
2. Rotate the screw cap counterclockwise to remove it from the alarm unit connector.
3. Align the communication cable’s connector to the alarm unit connector. Rotate the
sleeve clockwise to engage the threads, and tighten firmly.
■ Connect the optional AC adaptor (in case of using 100 VAC, 50/60Hz power supply unit)
Remove the DC jack cover from the detector,
and insert the AC adaptor plug. Plug in the
AC adaptor to a wall outlet. (To use batteries,
refer to page 38 for battery installation.)
When operating the detector using only the AC adaptor (no batteries), the
battery-full icon and plug icon are alternately displayed.
When the detector is turned off then the AC adaptor is disconnected, the
detector’s internal clock will stop in about an hour. Install batteries as
required.
To prevent battery leakage, batteries need to be replaced with new ones
when their level is low, even if an AC adaptor is connected.
Do not connect/disconnect the AC adaptor plug to/from the detector while
the detector is on. Switching power between batteries and AC adaptor
needs to be done while the detector is off. Not doing so may turn off the
detector.
NOTE
WARNING Do not use the AC adaptor
in a hazardous area.
A
C adaptor plug
Groove in communication
cable’s connector Sleeve
A
larm unit connector
with its cap
10
3. Operation
Preparation
(Connecting gas sampling tube (1m/8m), alarm unit, and AC adaptor)
■ Connect the gas sampling tube (1m)
1. Screw the probe nozzle into the drain filter.
2. Press the gas sampling tube’s coupler onto the gas detector’s gas inlet until it clicks.
To remove the coupler from the gas inlet, pull the sleeve up to unlock and release the
coupler.
■ Connect the gas sampling tube (8m)
1. Press the gas sampling tube’s coupler onto sampling float’s connection port until it
clicks.
2. Press the coupler at the other end of the gas sampling tube, onto the detector’s gas
inlet until it clicks.
To remove the coupler from the detector’s gas inlet or sampling float’s connection port,
pull the sleeve up to unlock and release the coupler.
Press coupler onto connection port Press coupler onto gas inlet
SleeveSleeve
Screw probe nozzle into drain filter Press coupler onto gas inlet
Screw in the probe nozzle to
engage the drain filter threads.
Sleeve
Firmly connect all connectors and tube to ensure proper gas detection.
WARNING

11
3. Operation
■ Connect the optional alarm unit
1. Install two batteries (page 38).
2. Rotate the screw cap counterclockwise to remove it from the alarm unit connector.
3. Align the communication cable’s connector to the alarm unit connector. Rotate the
sleeve clockwise to engage the threads, and tighten firmly.
■ Connect the optional AC adaptor (in case of using 100 VAC, 50/60Hz power supply unit)
Remove the DC jack cover from the detector,
and insert the AC adaptor plug. Plug in the
AC adaptor to a wall outlet. (To use batteries,
refer to page 38 for battery installation.)
When operating the detector using only the AC adaptor (no batteries), the
battery-full icon and plug icon are alternately displayed.
When the detector is turned off then the AC adaptor is disconnected, the
detector’s internal clock will stop in about an hour. Install batteries as
required.
To prevent battery leakage, batteries need to be replaced with new ones
when their level is low, even if an AC adaptor is connected.
Do not connect/disconnect the AC adaptor plug to/from the detector while
the detector is on. Switching power between batteries and AC adaptor
needs to be done while the detector is off. Not doing so may turn off the
detector.
NOTE
WARNING Do not use the AC adaptor
in a hazardous area.
A
C adaptor plug
Groove in communication
cable’s connector Sleeve
A
larm unit connector
with its cap
10
3. Operation
Preparation
(Connecting gas sampling tube (1m/8m), alarm unit, and AC adaptor)
■ Connect the gas sampling tube (1m)
1. Screw the probe nozzle into the drain filter.
2. Press the gas sampling tube’s coupler onto the gas detector’s gas inlet until it clicks.
To remove the coupler from the gas inlet, pull the sleeve up to unlock and release the
coupler.
■ Connect the gas sampling tube (8m)
1. Press the gas sampling tube’s coupler onto sampling float’s connection port until it
clicks.
2. Press the coupler at the other end of the gas sampling tube, onto the detector’s gas
inlet until it clicks.
To remove the coupler from the detector’s gas inlet or sampling float’s connection port,
pull the sleeve up to unlock and release the coupler.
Press coupler onto connection port Press coupler onto gas inlet
SleeveSleeve
Screw probe nozzle into drain filter Press coupler onto gas inlet
Screw in the probe nozzle to
engage the drain filter threads.
Sleeve
Firmly connect all connectors and tube to ensure proper gas detection.
WARNING

13
3. Operation
2. Detection
The detector is ready for use when the gas concentrations
screen is displayed.
→Page 14 “Gas Concentrations Screen”
→Page 15 “Gas Alarm”
Gas concentrations screen
3. Power off
(1) Press and hold the POWER button.
(2) A countdown starts from “3”, “2”, and “1” being displayed in sequence along with a beep
for each. After the detector gives off a long beep with “0” being displayed, the LCD will
turn off then the detector will turn off.
An activated carbon filter is installed inside the CO sensor for the purpose
of removing alcohol or interference gases like H2S. Replace it with a new
one, as required (page 36).
NOTE
- Before turning off the detector, ensure that all the readings
become zero in clean air by placing its probe nozzle and sampling
tube in clean air.
- If the detector is exposed to a high humidity, operate the detector
for more than 5 minutes in clean air, then turn off the detector.
CAUTION
A significant change in work environment (e.g. temperature or
humidity change) may cause a zero drift (deviation from 0%LEL,
0ppm or 21.0vol%). To clear this, press and hold the ZERO button for
two seconds to perform zero adjustment (zeroing) in clean air.
CAUTION
If a reading exceeds the full scale value, move the detector to clean
air area immediately. Continued use in contaminated air will lead to
improper gas detection and/or may result in increased time for the
reading to return to zero.
WARNING
12
3. Operation
Operation Procedure
1. Power on -> Warm-up -> Gas concentrations screen
(1) Press and hold the POWER button for 2 seconds. The detector gives a two tone beep
as it powers on.
(2) Message “Warming-up” is displayed on the LCD.
When the alarm unit is connected, communication will automatically start and the
message “Alarm unit connected” will be displayed on the LCD.
(3) The detector gives a long beep within one minute, and the gas concentrations screen
will be displayed.
Always perform a routine check (page 39) before use.
WARNING
Zero adjustment (zeroing) starts automatically when the detector is
turned on. Make sure to turn on the detector while its probe nozzle
or sampling float is in clean air to prevent incorrect zero adjustment.
Incorrect zero adjustment will cause inaccurate measurements to be
displayed.
WARNING
If an error message is displayed, refer to 4. “Notifications/Error Messages
on Display” on page 34 for solution.
NOTE
Preparation
Gas concentrations
screen
1. Power on 2. Detection 3. Power off
STEPS
Warm-up

13
3. Operation
2. Detection
The detector is ready for use when the gas concentrations
screen is displayed.
→Page 14 “Gas Concentrations Screen”
→Page 15 “Gas Alarm”
Gas concentrations screen
3. Power off
(1) Press and hold the POWER button.
(2) A countdown starts from “3”, “2”, and “1” being displayed in sequence along with a beep
for each. After the detector gives off a long beep with “0” being displayed, the LCD will
turn off then the detector will turn off.
An activated carbon filter is installed inside the CO sensor for the purpose
of removing alcohol or interference gases like H2S. Replace it with a new
one, as required (page 36).
NOTE
- Before turning off the detector, ensure that all the readings
become zero in clean air by placing its probe nozzle and sampling
tube in clean air.
- If the detector is exposed to a high humidity, operate the detector
for more than 5 minutes in clean air, then turn off the detector.
CAUTION
A significant change in work environment (e.g. temperature or
humidity change) may cause a zero drift (deviation from 0%LEL,
0ppm or 21.0vol%). To clear this, press and hold the ZERO button for
two seconds to perform zero adjustment (zeroing) in clean air.
CAUTION
If a reading exceeds the full scale value, move the detector to clean
air area immediately. Continued use in contaminated air will lead to
improper gas detection and/or may result in increased time for the
reading to return to zero.
WARNING
12
3. Operation
Operation Procedure
1. Power on -> Warm-up -> Gas concentrations screen
(1) Press and hold the POWER button for 2 seconds. The detector gives a two tone beep
as it powers on.
(2) Message “Warming-up” is displayed on the LCD.
When the alarm unit is connected, communication will automatically start and the
message “Alarm unit connected” will be displayed on the LCD.
(3) The detector gives a long beep within one minute, and the gas concentrations screen
will be displayed.
Always perform a routine check (page 39) before use.
WARNING
Zero adjustment (zeroing) starts automatically when the detector is
turned on. Make sure to turn on the detector while its probe nozzle
or sampling float is in clean air to prevent incorrect zero adjustment.
Incorrect zero adjustment will cause inaccurate measurements to be
displayed.
WARNING
If an error message is displayed, refer to 4. “Notifications/Error Messages
on Display” on page 34 for solution.
NOTE
Preparation
Gas concentrations
screen
1. Power on 2. Detection 3. Power off
STEPS
Warm-up

15
3. Operation
Gas Alarm
When the gas concentration exceeds the gas alarm set value, a gas alarm will activate. Detailed
gas alarm operation is given in the table below. Refer to page 8 for the alarm unit’s operation when
an alarm is active. When the gas concentration falls below the gas alarm set value, the gas alarm
will automatically deactivate (automatic reset). Press the BZ.STOP button for 0.5 seconds to mute
the audio alarm. However, if a new alarm arises, the unit will start chirping.
Typical oxygen gas alarm operation (1st stage gas alarm: 19.5% and 2nd stage gas alarm: 18.0%)
LCD Audio alarm Red
alarm light
1st stage alarm
Standard
“AL1” flashes
Chirping
3 flashing
LEDs
synchronize to
the audio
alarm.
Trend graph
“AL1” flashes
Te x t
”AL1” and “concentration value”
alternately flash.
2nd stage alarm
Standard
“AL2” and the display alternately flash
Rapid chirping
(louder siren)
Trend graph
“AL2” and the display alternately flash
Te x t
“AL2” and the display alternately flash
O
2
If the O2 concentration exceeds the higher limit or it falls below the lower limit,
when the O2 mode is set to “High-Low” (page 26), the detector will skip the 1st
stage alarm and perform as described for the 2nd stage alarm in the table below.
NOTE
14
3. Operation
Gas Concentrations Screen
This detector can simultaneously display three or four gas concentrations on its LCD. There are
three display format options. Each press of the DISPLAY button will change the display format.
From the display setting screen (page 30), it is possible to select the format of the first screen
shown when the gas detector turns on.
Standard
Range displayed on
bar graph
O2: 0-25vol%
H2S: 0-30ppm
COMB: 0-100%LEL
CO: 0-150ppm
a. Detected gas concentration d. Gas concentration on bar graph
display
b. Unit of gas concentration (ppm, vol%,
or %LEL)
g. Left and right vertical lines
represent low and high alarm set
values respectively.
c. Gas type
Trend graph
a. The highest concentration detected
per minute (peak value per minute) is
displayed. The last 54 peak values
are displayed in trend graph.
For oxygen, the lowest concentrations
are used as peak values.
c. Gas type
d. Full scale value
e. Upper and lower horizontal lines
represent high and low alarm set
values respectively.
b. Gas concentration value and unit
Te x t
Gases in chemical symbol and their
concentrations are displayed.
- When the gas concentration exceeds the service range,”―――” and full scale value
will be alternately displayed for gas concentration.
- If gas detection becomes impossible due to a sensor error, etc., the display for the
sensor in question will be blacked out.
c
b d
e
a
H2S display magnified view
a
b
c
d
g
H2S display magnified view

15
3. Operation
Gas Alarm
When the gas concentration exceeds the gas alarm set value, a gas alarm will activate. Detailed
gas alarm operation is given in the table below. Refer to page 8 for the alarm unit’s operation when
an alarm is active. When the gas concentration falls below the gas alarm set value, the gas alarm
will automatically deactivate (automatic reset). Press the BZ.STOP button for 0.5 seconds to mute
the audio alarm. However, if a new alarm arises, the unit will start chirping.
Typical oxygen gas alarm operation (1st stage gas alarm: 19.5% and 2nd stage gas alarm: 18.0%)
LCD Audio alarm Red
alarm light
1st stage alarm
Standard
“AL1” flashes
Chirping
3 flashing
LEDs
synchronize to
the audio
alarm.
Trend graph
“AL1” flashes
Te x t
”AL1” and “concentration value”
alternately flash.
2nd stage alarm
Standard
“AL2” and the display alternately flash
Rapid chirping
(louder siren)
Trend graph
“AL2” and the display alternately flash
Te x t
“AL2” and the display alternately flash
O
2
If the O2 concentration exceeds the higher limit or it falls below the lower limit,
when the O2 mode is set to “High-Low” (page 26), the detector will skip the 1st
stage alarm and perform as described for the 2nd stage alarm in the table below.
NOTE
14
3. Operation
Gas Concentrations Screen
This detector can simultaneously display three or four gas concentrations on its LCD. There are
three display format options. Each press of the DISPLAY button will change the display format.
From the display setting screen (page 30), it is possible to select the format of the first screen
shown when the gas detector turns on.
Standard
Range displayed on
bar graph
O2: 0-25vol%
H2S: 0-30ppm
COMB: 0-100%LEL
CO: 0-150ppm
a. Detected gas concentration d. Gas concentration on bar graph
display
b. Unit of gas concentration (ppm, vol%,
or %LEL)
g. Left and right vertical lines
represent low and high alarm set
values respectively.
c. Gas type
Trend graph
a. The highest concentration detected
per minute (peak value per minute) is
displayed. The last 54 peak values
are displayed in trend graph.
For oxygen, the lowest concentrations
are used as peak values.
c. Gas type
d. Full scale value
e. Upper and lower horizontal lines
represent high and low alarm set
values respectively.
b. Gas concentration value and unit
Te x t
Gases in chemical symbol and their
concentrations are displayed.
- When the gas concentration exceeds the service range,”―――” and full scale value
will be alternately displayed for gas concentration.
- If gas detection becomes impossible due to a sensor error, etc., the display for the
sensor in question will be blacked out.
c
b d
e
a
H2S display magnified view
a
b
c
d
g
H2S display magnified view

17
3. Operation
Functions and Settings
The MENU screen allows the user to set or activate functions.
To access the MENU screen, press the MENU button.
Menu screen
Item Function and setting details Reference
Alarm Test Operation test for alarm light and audio alarm.
Additionally, the alarm volume can be adjusted. Page 18
Data logging
Logging of detection data (date and time, gas concentration
and temperature) at a preset interval.
This mode allows the following operations.
Start data logging
Stop data logging
Clear log data
Change logging interval
Pages 19-23
Settings
Alarm set values
(*)
Set the alarm set values of the target
gases. Page 24
Clock setting Set the time and date. Page 25
O2 mode setting
(*)
Select the mode for oxygen gas alarm
and peak hold. Page 26
Span adjustment
(*)
Incorrect span adjustment will make
accurate gas detection impossible,
leading to a dangerous situation.
Span adjustment must be performed
by an authorized safety manager only.
Request us for span adjustment.
N/A
Volume/Mute Adjust the alarm volume and operation
tone. Set the mute mode to on/off. Pages 27-28
LCD contrast Adjust the display contrast. Page 29
Display
Switch the language (English or
Japanese). Select the gas
concentrations display format. Set the
backlight timeout.
Page 30
Safety lock
Lock the three items marked with (*) to
prevent changes from unauthorized
access personnel. Must be unlocked
to make changes on them. Locked by
default.
Pages 31-33
16
3. Operation
Peak Hold
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. For combustible gas (COMB),
hydrogen sulfide (H2S) and carbon monoxide (CO), the highest marked concentration will be
maintained as its peak value. For oxygen (O2), the lowest marked concentration will be
maintained as its peak value by default.
Activate
peak hold
Press the PEAK button
for more than 3
seconds.
Flashing "PEAK” icon will replace the date at the
bottom left of the LCD. The peak values will be
displayed.
Gas concentrations screen
Deactivate peak hold
Press the PEAK button
for more than 2
seconds.
Returns to the normal gas concentrations screen and
the peak values will be cleared.
Automatic Backlight and Backlight Timeout
・Automatic backlight
The LCD backlight is turned on/off depending on ambient light.
・Backlight timeout
The LCD backlight will automatically turn off when it times out or in bright light. Refer to page 30
for the backlight timeout setting procedure.
Settable time Description
[―――] minutes Backlight remains on until in bright light.
0 to 10 min. 5-min.increments
(e.g. 5 min. 10 min.)
Backlight will turn off when the preset time
(minutes) passes.
10 to 60 min. 10-min.increments
(e.g. 20 min. 30 min. ….60 min.)
60 to 600 min. 30-min.increments
(e.g. 90 min. 120 min…..600 min)
The peak hold function will be canceled each time the unit is turned off.
NOTE
The LCD backlight is lit while connected with an optional AC adaptor.
NOTE

17
3. Operation
Functions and Settings
The MENU screen allows the user to set or activate functions.
To access the MENU screen, press the MENU button.
Menu screen
Item Function and setting details Reference
Alarm Test Operation test for alarm light and audio alarm.
Additionally, the alarm volume can be adjusted. Page 18
Data logging
Logging of detection data (date and time, gas concentration
and temperature) at a preset interval.
This mode allows the following operations.
Start data logging
Stop data logging
Clear log data
Change logging interval
Pages 19-23
Settings
Alarm set values
(*)
Set the alarm set values of the target
gases. Page 24
Clock setting Set the time and date. Page 25
O2 mode setting
(*)
Select the mode for oxygen gas alarm
and peak hold. Page 26
Span adjustment
(*)
Incorrect span adjustment will make
accurate gas detection impossible,
leading to a dangerous situation.
Span adjustment must be performed
by an authorized safety manager only.
Request us for span adjustment.
N/A
Volume/Mute Adjust the alarm volume and operation
tone. Set the mute mode to on/off. Pages 27-28
LCD contrast Adjust the display contrast. Page 29
Display
Switch the language (English or
Japanese). Select the gas
concentrations display format. Set the
backlight timeout.
Page 30
Safety lock
Lock the three items marked with (*) to
prevent changes from unauthorized
access personnel. Must be unlocked
to make changes on them. Locked by
default.
Pages 31-33
16
3. Operation
Peak Hold
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. For combustible gas (COMB),
hydrogen sulfide (H2S) and carbon monoxide (CO), the highest marked concentration will be
maintained as its peak value. For oxygen (O2), the lowest marked concentration will be
maintained as its peak value by default.
Activate
peak hold
Press the PEAK button
for more than 3
seconds.
Flashing "PEAK” icon will replace the date at the
bottom left of the LCD. The peak values will be
displayed.
Gas concentrations screen
Deactivate peak hold
Press the PEAK button
for more than 2
seconds.
Returns to the normal gas concentrations screen and
the peak values will be cleared.
Automatic Backlight and Backlight Timeout
・Automatic backlight
The LCD backlight is turned on/off depending on ambient light.
・Backlight timeout
The LCD backlight will automatically turn off when it times out or in bright light. Refer to page 30
for the backlight timeout setting procedure.
Settable time Description
[―――] minutes Backlight remains on until in bright light.
0 to 10 min. 5-min.increments
(e.g. 5 min. 10 min.)
Backlight will turn off when the preset time
(minutes) passes.
10 to 60 min. 10-min.increments
(e.g. 20 min. 30 min. ….60 min.)
60 to 600 min. 30-min.increments
(e.g. 90 min. 120 min…..600 min)
The peak hold function will be canceled each time the unit is turned off.
NOTE
The LCD backlight is lit while connected with an optional AC adaptor.
NOTE

19
3. Operation
Functions and Settings: Data Logging
(1) Press the MENU button to access the MENU
screen.
(2) Press the ▲or ▼button to select “Data logging”.
Press the button to confirm the selection.
Menu screen
(3) The LOGGER screen will be displayed. Press the ▲or ▼button to select the
desired item. Press the button to confirm the selection.
Item Description
Start Start data logging (page 20)
Stop
(not selectable)
Stop data logging (page 21)
Clear Delete log data (page 22)
Interval Set the interval between logs
(page 23)
Logger screen
To read logs, a personal commuter (page 1) and an XP302ML data logger
kit (optional) are necessary. All logs are CSV files which can be opened by
spreadsheet software (e.g. MS® Excel).
NOTE
WARNING Do not connect/disconnect the USB cable to/from the detector in a
hazardous area.
When using the product for the first time
Format to clear all data logs (page 22).
Data logging is not available when flashing “00.01.01L00:00” is displayed
or the clock is stopped. Set the clock (page 25).
NOTE
18
3. Operation
Functions and Settings: Alarm Test
(1) Press the MENU button to access the MENU
screen.
(2) “Alarm test” is selected. Press the button to
confirm the selection.
Menu screen
(3) The ALARM TEST screen is displayed. The light
and audio alarm start flashing and chirping.
Alarm test screen
When the alarm unit is connected
Press the MENU button to select “External AL
volume”. Alarm sound will be produced only by the
alarm unit.
Alarm test screen when
alarm unit is connected
(4) Press the ▲or ▼button to adjust the alarm volume.
(5) Press the button to end the alarm test. The screen will return to the gas concentrations
screen.
If the mute mode is active, the unit
will prompt “Mute mode is active. Exit
Mute mode?” To continue the alarm
test, select “Yes” by pressing the 
button. The light and audio alarm
start flashing and chirping.
NOTE
Volume adjustments made here are applied to audio gas alarm.
WARNING