Cosmos XO-326IIsA User manual

Document No.: XO
-
326II
s
T
This instruction manual explains the use of six models listed in the left.
•Keep this instruction manual available for quick reference when needed.
•Read this instruction manual and understand the information thoroughly
before using.

Table of Contents
Included in this Package.........................................................................................................1
1. Introduction.........................................................................................................................2
Explosion-Proof Requirements (Japan)..............................................................................2
Symbols .............................................................................................................................2
Safe Operation...................................................................................................................3
2. Product Layout and Functions............................................................................................4
3. Operating Procedure..........................................................................................................7
Operating Procedure..........................................................................................................7
4. Error Messages................................................................................................................11
5. Replacement of Consumables .........................................................................................12
Replacing Filter Element..................................................................................................12
Remaining Battery Level Alert and Battery Replacement.................................................13
6. Maintenance Check..........................................................................................................15
Daily Check......................................................................................................................15
Periodic Check.................................................................................................................15
Replacement Parts...........................................................................................................15
7. Troubleshooting................................................................................................................16
8. Warranty...........................................................................................................................16
9. Specifications ...................................................................................................................17
10. Detection Principle..........................................................................................................18
11. Glossary..........................................................................................................................18

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－Included in this Package －
The Following items are enclosed in the package. Carefully check all items listed below before use.
Contact your New Cosmos representative if any items are broken or missing.
●Options（sold separately）
Digital Oxygen Indicator
(with oxygen sensor for factory inspection and soft case) 1
Shoulder Strap 1
Oxygen Sensor in a packet 1
FE-2 Replacement Filter Element (2pcs) 1
Size AA alkaline dry cell battery (Made by PANASONIC) 2
Instruction Manual 1
Inspection Report 1
Model Reference
LC-3-5 Extension Sensor Cable 5m
with storage case Use to extend the length of sensor cable.

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1. Introduction
Thank you for purchasing the Oxygen Indicator XO-326IIs series. Please read this instruction
manual thoroughly before using to help prevent gas accidents and to aid in safety inspections and
maintenance.
The Oxygen Indicator measures the concentration of oxygen (O2) during operations in pit, manhole,
septic tank, basement, tank, etc. This Oxygen Indicator prevents accidents from lack of oxygen; the
alarm beeps when the gas concentration reaches the set value.
Read and understand thoroughly this Instruction Manual regardless of your experience with using
the Oxygen Indicators. Do not use this Oxygen Indicator for improper purposes. Do not use this
Oxygen Indicator in undocumented way in this manual.
−Explosion-Proof Requirements (Japan)
Confirm the following explosion-proof requirements.
−Symbols
The following symbols are used for safety purposes:
DANGER Indicates hazardous situation that may result in serious injury or
death, if not avoided.
WARNING Indicates potentially hazardous situation that may result in serious
injury or death, if not avoided.
CAUTION Indicates potentially hazardous situation that may result in minor injury
or physical damage, if not avoided.
Indicates operational advices.
Condiction of Use:
▪Outside of Japan, the Oxygen Indicator should not be used in hazardous locations.
▪Replace batteries in non-hazardous location.
▪Use the Oxygen Indicator in the specified New Cosmos soft case.
▪For comprehensive measures to prevent accidents due to electrostatic charges, the
user should desirably wear anti-static working clothes and conductive footwear
(antistatic working shoes), and the floor should desirably be a conductive work floor with
a leakage resistance of 10M ohms or less.
▪Do not use other than mixed gas between air and combustible gas or vapor and toxic
gas in measuring the oxygen concentration.
NOTE

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−Safe Operation
Be sure to observe the following to use the product safely and properly.
▪
Remove the batteries if the Digital Oxygen Indicator will not be unused for
an extended period of time.
▪Check the battery status periodically (approximately once a month) even if
the Digital Oxygen Indicator remains unused for an extended period of
time. Replace batteries as the leakage of electrode may occur when the
battery level is low.
▪The Digital Oxygen Indicator has explosion-proof structure. To avoid
damaging the explosion-proof performance, never attempt to disassemble,
remodeling, modifying of structure or circuit of the Oxygen Indicator.
▪Since the Oxygen Indicator does not have a drip-proof structure, keep
away from water.
▪Keep the Oxygen Indicator away from heat and humidity. It may affect the
performance.
▪Do not leave or use the Oxygen Indicator in places where the temperature
or humidity fluctuates greatly. It may affect the performance.
▪Keep the Oxygen Indicator away from significant changes in atmospheric
pressure. It may affect the performance.
▪Avoid high mechanical impacts, dropping and throwing the Oxygen
Indicator. It may affect the performance.
▪Incase of dew condensation, conduct an inspection after drying the
Oxygen Indicator completely before use.
▪Do not use other than the specified batteries. It may damage the
explosion-proof structure.
▪Adjust pressure of measured value when detecting at places where the
atmospheric pressure is different from the standard, such as high altitude,
due to the pressure dependence of oxygen sensor.
▪Be careful not to submerge the Oxygen Indicator when using in manhole. It
may cause failure in measurement.
▪The gas sensor contains harmful substances. When disposing of the
sensor, return to New Cosmos Electric or dispose as industrial waste.
▪The batteries life will be shorter when using the Indicator at low
temperature than using at normal temperature due to the battery
characteristics.
▪Keep walkie-talkie away from the Indicator while in use. It may cause the
indicator shakes or alarm errors due to radio wave.
CAUTION
DANGER
▪
If the gas alarm is activated, take all necessary precautions immediately to
prevent lack of oxygen.
WARNING
▪Make sure to turn ON the power in normal atmosphere. Otherwise, it may
not be able to detect gas properly since zero adjustment will start
automatically.
▪Do not block the sampling port. The oxygen cannot be measured properly.
▪Use clean and dry filter elements. If the filter element is dirty or wet, the
oxygen cannot be measured properly.
▪Do not block the buzzer port or the alarm will be hard to hear.
▪The sensor unit is guaranteed for one year from the date of purchase. It is
highly recommended to replace a sensor after one year for proper oxygen
measurement.

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2. Product Layout and Functions
1
2
8
10
5 4
11
9
7
3
12
6
6
XO-326IIsA
XO-326IIsA-V
XO-326IIsB
XO-326IIsB-V XO-326IIsC
XO-326IIsC-V

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No.
Name Functions
1 POWER Switch Turns the power on and off.
2 AIR ADJ. Switch Adjusts the air to 21.0%
3
LCD Display Displays the gas concentration value and other
messages.
(a) Remaining battery level:
High・・・・・・・・Low Replace
(b) Gas concentration and error display
(c) Unit of gas concentration
4 Gas Detection port Detects gas
5 Sensor Unit Store oxygen sensor element
6 Sensor Cable Holder Rewind the cable
7 1m Sensor Cable (spiral cable) Extend the cable to 1 m
(XO-326IIsB, XO-326IIsB-V)
8 5m Sensor Cable Extend the cable to 5 m
(XO-326IIsA, XO-326IIsA-V)
9 10m Sensor Cable Extend the cable to 10 m
(XO-326IIsC, XO-326IIsC-V)
10 Alarm Lamp Flashes when alarming.
11 Buzzer Sound Hole Buzzer sounds.
12 Battery Cover Lid of battery compartment
(a)
(b) (c)

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No.
Name Functions
1 Shoulder strap bracket Fix the shoulder strap
2 Sensor storage Store sensor unit
3 Side pocket Store instruction card
Soft case
1
3
2
For XO-326IIsA
and XO-326IIsA-V
For XO-326IIsB
and XO-326IIsB-V
For XO-326IIsC
and XO-326IIsC-V

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3. Operating Procedure
−Operating Procedure
1. Replace a Sensor
1) Take an oxygen sensor out from a packet.
2) Turn the sensor cap counterclockwise and remove
oxygen sensor from the sensor case..
3) Pinch the oxygen sensor for factory inspection
straight up slowly and pull slowly.
4) Adjust the asymmetric oxygen sensor connector
pins to the socket on sensor board and push to
the sensor base.
▪Be sure to perform a maintenance check before operating detection (see
on page15).
WARNING
Install
batteries
2
STEP
Detect
4
Turn ON
power
Gas
concentration
display
3
Turn OFF
power
5
Replace
sensor
1
▪Replace the attached oxygen sensor for factory inspection to the new
Oxygen Sensor in a packet.
▪It may damage the performance of the Oxygen Indicator if it is not
attached correctly.
CAUTION
Oxygen sensor
Sensor case Sensor cap
Pull up
Oxygen sensor for
factory inspection
WARNING
▪Plug the oxygen sensor connector pins to the socket vertically, to avoid
damaging pins or socket.
Plug the oxygen sensor properly. If the oxygen sensor is plugged in
reverse (eccentrically), the sensor cap cannot be tightened properly
and it may break the oxygen sensor connector pins.
CAUTION

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5) Turn the sensor cap clockwise to attach to
the sensor case.
2. Install Batteries
For the first use, batteries are not installed in the equipment. Insert the provided batteries in
reference to page 12.
3. Turn ON Power
Press [Power Switch] for about 3 seconds. It will display ”on” and countdown of “3, 2, 1“. Then it
will display gas concentration after displaying “alarm set value” and performing “air adjustment”
automatically. Buzzer sounds, alarm lamp and vibration (for vibration specification) will also
activate within 10 seconds.
1) “on” and Countdown “1, 2, 3”
▪Make sure to turn on the power in normal atmosphere. Otherwise, it
may not be able to detect gas properly since zero adjustment will start
automatically.
WARNING
▪During switch operation of the Oxygen Indicator, the backlight of LCD
display lights up automatically for about 5 seconds.
NOTE
Incorrect
*
Oxygen sensor is connected eccentrically.
Adjust two asymmetric pins
Sensor base
Correct
Push
FE-2 Filter Element
O-ring
▪Right after replacing the oxygen sensor, sensor output is not
stabilized. Leave in normal atmosphere for more than 30 minutes
before use.
▪In case FE-2 Filter Element and O-
ring are come off from the sensor
cap, refer to “Replacing Filter Element” on page 12 to attach properly.
CAUTION

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2) Displaying Gas Alarm Set Value
It displays “1st stage alarm set value” and then “2nd stage alarm set value”.
[1st stage alarm set value] [2nd stage alarm set value]
3) Air Adjustment
When blinking sensor life display is changed to display of “21.0%”, air adjustment is completed.
[Sensor Life Display] [Gas Concentration Display]
Gas detection is available after air adjustment.
Air adjustment is complete.
▪Confirm the display of “23.0%” is blinking (sensor life display) during air
adjustment.As the sensor life comes closer, it will display less than 23.0%.
Replace oxygen sensor before it becomes “21.0%”.
(Refer to “Replacement Parts” on page 15)
NOTE

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4. Detection
▪1st stage and 2nd stage Alarm
When the gas concentration reaches 1st stage or 2nd stage alarm set value, buzzer and
vibration (for vibration specification) will activate, and gas concentration display and alarm lamp
will flash.
[1st stage alarm] [2nd stage alarm]
5. Turn OFF Power
Press power switch for approx. 3 seconds.
“oFF” will be displayed and the power turns off.
Buzzer will sound and alarm lamp will activate.
▪Do not block the sampling port of sensor by cloth, mud or water. The
oxygen cannot be measured properly.
▪Use clean and dry filter element of the sampling port. If the filter
element is dirty or wet, the oxygen cannot be measured properly.
▪Avoid high mechanical impacts, dropping and throwing the sensor.
Otherwise it may affect the performance.
▪Do not block the buzzer port or the alarm will be hard to hear.
WARNING
▪When the working condition changes (temperature, humidity), 21.0%
may also change. In such case, it is imperative to perform air
adjustment by pressing “air adjustment switch” for approx. 3 seconds.
WARNING
▪Be careful not to twist the sensor cable when extending the cable in order
to avoid damaging the cable.
▪In case of simultaneous alarms, 2nd-stage alarm has priority over 1st-stage
alarm.
▪When the gas concentration exceeds its service range, it will display the
service range limit and “OL” alternately.
NOTE
▪The cycle of buzzer and blinking alarm lamp at 2nd stage alarm is faster
than 1st stage alarm.
▪The backlight LCD lights up while alarming.
NOTE

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4. Error Messages
In the event of the Oxygen Indicator failure, the error message is displayed on LCD, or alarm lamp
lights up, buzzer sounds and it vibrates (for vibration specification). The major error messages are
listed below. Take appropriate measures in accordance with the message displayed.
Error Display Content
Zero Adjustment
Defect
Defect of air adjustment or sensor trouble.
Adjust air in clean air again. Request repairs
if the recovery is not successful.
Lack of Battery
Run out of battery.
Replace batteries.
(Refer to “Remaining Battery Level Alert and
Battery Replacement” on page 13)
Malfunction
Trouble inside the unit. Remove batteries and
reinstall. Turn on the power and confirm its
performance. Request repairs if the recovery
is not successful.
When the switch or display does not function correctly without displaying error message, reset
batteries and turn on the power again. If it still does not work properly, contact your New Cosmos
representative.

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5. Replacement of Consumables
−Replacing Filter Element
A tainted or wet filter element needs to be replaced with a new filter.
1) Turn the sensor cap counterclockwise and remove.
2) Take off the O-ring.
3) Remove the old filter element and attach the new
filter to the sensor cap.
4) Attach O-ring and tighten the sensor cap back again.
Filter element
Ｏring
▪Attach the filter element properly. Otherwise, it may not serve the function
of filter element and may not be able to detect properly.
▪Securely tighten the sensor cap to prevent water from penetrating into the
Oxygen Indicator.
▪If the water penetrates inside the Oxygen Indicator, request a repair. It
cannot detect properly.
CAUTION
▪Do not push or poke the filter element. It may damage the waterproof and dust
-proof function..
NOTE
Sensor capSensor case
Oxygen sensor

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−Remaining Battery Level Alert and Battery Replacement
When the battery level drops, the battery exhausted icon will change as below, and before
running out of battery, it sounds “pi…pi…” intermittently for 10 seconds interval (pre-alarm).
When “E-b” is displayed, it will not work and alarm will sound (battery .
Alarm can be turned off by turning OFF the power.
1) Take out the sensor unit from the sensor
pocket and take out the Oxygen Indicator
from soft case.
2) Press “OPEN” on the battery lid of the back
of Oxygen Indicator and open.
▪Replace batteries in a safe place.
WARNING
▪Use AA alkaline dry cell batteries (LR6/ made by PANASONIC).
Otherwise, it may damage the explosion-proof structure.
WARNING
Turn OFF
Pre-alarm
▪Use the same kind of batteries and always use fresh batteries.
▪Replace two batteries at the same time.
NOTE
Sensor pocket
Soft case
Battery lid

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3) Pull the red ribbon to remove used batteries.
4) Insert batteries over the red ribbon with correct polarity. Polarity (+ and −) is marked on the
bottom.
5) Slide and close the battery lid.
6) Store the Oxygen Indicator into soft case, and put the sensor unit into sensor pocket.
Red ribbon
Align red ribbon to the right and pull to
remove batteries.
NOTE
▪Be careful to observe the battery polarity. Reverse polarity may cause
batteries to leak liquids and may reduce its life expectancy.
WARNING

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6. Maintenance Check
This Oxygen Indicator is precision equipment. Maintenance in accordance with the following items is
imperative for maintaining performance of the Oxygen Indicator and ensuring safety. Failure to
comply with “Safe Operation” instructions on page 3, such as impact shock from dropping or
exposure to water, or improper use as described in “9. Specifications“ on page 17, such as detecting
gas concentration exceeding the detection range or use in temperature and humidity exceeding its
operation range, request an inspection (with fee) along with a description of the situation.
−Daily Check
Items to Check Description
Alarm Function
Check the alarm indications by applying gas slightly exceeding its
alarm set value.
Confirm that gas concentration display changes, alarm lamp blinks
as it reaches to the alarm set value, buzzer sounds and vibration
activates (for vibration specifications).
If there is a defect in display, alarm lamp does not blink, buzzer
does not sound or vibration does not activate, request for repair.
Filter Element Taineted or wet filter element needs to be replaced with a new filter
(see on page 12).
Remaining Battery Level
Replace with new batteries when the battery level is low (see on
page 13).
−Periodic Check
To ensure the accuracy of the Oxygen Indicator, contact your New Cosmos representative for
inspection more than once a year.
−Replacement Parts
Item Model Remarks
Replacement Filter Element
(10pcs) FE-2-10 For XO-326II
Replacement Oxygen Sensor OS-3M-JP For XO-326II
▪Read the label on sensor in a packet for storage life and sensor life.
When its storage life or sensor life exceeds, it may not be able to detect
properly. Recommended replacement cycle for oxygen sensor is one
year from the time the packet is opened.
WARNING

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7. Troubleshooting
Before requesting repairs, please check the items in the following table.
When the Oxygen Indicator fails to operate, remove all batteries and install the batteries again after
several minutes.
Symptom Cause Treatment Reference
Reverse polarity Install batteries correctly.
Power does not be turned ON
by pressing the POWER switch.
Battery life Replace batteries.
Battery
Replacement
on page 13
Error Message is displayed See "Error Message" on page 11.
8. Warranty
New Cosmos Electric Company Limited (hereafter referred to as “New Cosmos”) offers the following as
the sole and exclusive limited warranty available to the Customer. This warranty is in lieu of, and the
Customer waives, all other warranties of any kind or nature, expressed or implied, including without
limitation any warranty for merchantability or fitness for a particular purpose. The remedies set forth
herein are exclusive.
New Cosmos warrants to the original purchaser (Customer) and no other person or entity that the gas
detection product supplied by New Cosmos shall be free from defects in materials and workmanship for
a period of one (1) year from the date of purchase. This warranty does not apply to consumables,
including but not limited to fuses and filters. Certain other accessories not specifically listed here may
have different warranty periods.
If after examination of an allegedly defective product returned to New Cosmos, with freight prepaid,
should it be found that the product fails to conform to this warranty, the Customer’s only remedy and
New Cosmos’s only obligation shall be, at New Cosmos’s sole discretion, replacement or repair of the
non-conforming product or refund of the original purchase price of the non-conforming product. In no
event shall New Cosmos be liable for any other special, incidental, or consequential damages or losses
of any kind whatsoever, including but not limited to loss of anticipated profits and any other loss caused
by reason of non-operation of the product.
This warranty is valid only if the product is maintained and used in accordance with New Cosmos’s
instructions and recommendations. New Cosmos shall be released from all obligations under this
warranty in the event repairs or modifications are made by persons other than its own or authorized
service personnel or if the warranty claim results from physical abuse or misuse of the product.

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9. Specifications
Model XO-326IIsA XO-326IIsA-V XO-326IIsB XO-326IIsB-V XO-326IIsC XO-326IIsC-V
Vibration No Yes No Yes No Yes
Cable Length 5m 1m (spiral cable) 10m
Target Gas Oxygen
Detection
Principle Galvanic cell
Sampling Method Diffusion type
Detection Range
(Service Range) 0 to 25.0 vol% (25.1 to 40.0 %)
Indication
Accuracy *1 Within +/- 0.5 vol%
Display Resolution 0.1 vol%
Alarm Set Value
1st stage: 19.5 vol%
2nd stage: 18.0 vol%
Response Time Within 20 seconds.
Alarm Function Buzzer sounds, Red lamp blinks, LCD display blinks (latching), Vibration*3
Power Source 2 x size AA alkaline dry cell battery (LR6/ made by PANASONIC)
Continuous Use *2 Approx. 15,000 hours (at 25 degrees C, displaying 21.0 vol%, backlight is off)
Explosion-proof Ex ia II CT3 X (Japan) *4
Allowable
Working Pressure
80KPa to 110KPa
Operating
Temperature/
Humidity -10 to +40 degrees C, 30 to 85％RH (non condensing)
Dimensions
(excluding protrusions)
66(W) x 170(H) x 29(D) mm 66(W) x 120(H) x 29(D) mm 66(W) x 200(H) x 29(D) mm
Weight
(including batteries
and soft case) Approx. 340 g Approx. 265 g Approx. 410 g
*1: Indication Accuracy: under the same condition.
*2: Battery life may vary according to circumstances, operating condition, storage period, and battery manufacturer.
*3: Vibration activates only for the vibration specifications.
*4: Outside of Japan, the Oxygen Indicator should not be used in hazardous locations.

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10. Detection Principle
Diaphragm galvanic cell (oxygen)
The sensor consists of a noble metal electrode, a base metal electrode, and an electrolytic
solution. Anoble metal electrode has contact with the air through theTeflon membrane.
Due to the electrical potential difference from the load resistance caused by connecting to both
terminals, the following reaction takes place.
Noble metal electrode O2＋2H2O＋4e-→4OH-
Base metal electrode 2Pb→2Pb2＋＋4e-
As a result, the electrical current commensurate with the oxygen concentration value in the air
flows from the noble metal electrode to the base metal electrode through an external circuit.
11. Glossary
Explosion-proof: Equipment designed in accordance with existing codes and standards such that it will
operate in a specified hazardous environment without causing an explosion.
Intrinsically safety: A protection technique for safe operation of electrical equipment in hazardous
areas by limiting the energy available for ignition.
Nonhazardous area: A location in which fire or explosion hazards are not expected to exist specifically
due to the presence of flammable gases or vapors, flammable liquids, combustible dusts,
or ignitable fibers.
Air adjustment:Adjustment of zero point in pure air.