Carbon Monoxide Detector

KS-7D
Instruction Manual
Keep this manual for easy reference.
Carefully read this manual prior to use.
This manual describes the standard model. If your unit has end-user-specificoptions, this manual will be superseded by your delivery specifications.

Instruction Manual No.
GAE-053-06
June 2023

Table of Contents
1. Introduction ................................................................................................................................1
2. General Precautions ..................................................................................................................2
3. Package Contents .....................................................................................................................3
4. Unit Dimensions and Components ............................................................................................4
4-1. Outer Appearance ..................................................................................................................4
4-2. Inner Components ..................................................................................................................5
5. Installation .................................................................................................................................6
6. Wiring ........................................................................................................................................96-1. Pin Terminal/Insulated Sleeve Installation ............................................................................10
6-2. Wire Connection/Disconnection to/from Terminal Block ...................................................... 11
6-2-1. Power Terminal Block ....................................................................................................... 11
6-2-2. External Output Terminal Block ......................................................................................... 11
6-3. Cable Tie Installation ............................................................................................................ 11
6-4. AC Power Cable (PC0125) Wiring Procedure .....................................................................12
7. Operation .................................................................................................................................13
7-1. Precautions before Use ........................................................................................................13
7-2. Operating Procedure ............................................................................................................13
7-3. LCD Operation .....................................................................................................................15
7-3-1. LCD ...................................................................................................................................15
7-3-2. Normal Operation Status ...................................................................................................15
7-3-3. Full Scale and Alarm Set Values Display ..........................................................................16
7-3-4. Peak Value Display and Reset ..........................................................................................16
7-3-5. Operation during Gas Alarm .............................................................................................16
7-4. User Mode ............................................................................................................................17
7-4-1. User Mode Operation ........................................................................................................17
7-4-2. Switching Maintenance Mode On/Off [Mode1] .................................................................18
7-4-3. Zero Adjustment [Mode 2] .................................................................................................19
7-4-4. Span Adjustment [Mode 3] ................................................................................................19
7-4-5. Alarm Test [Mode 4] ..........................................................................................................20
7-4-6. Alarm History [Mode 5] ......................................................................................................21
7-4-7. Clock Setting [Mode 6] ......................................................................................................22
7-5. Maker Mode .........................................................................................................................23
7-5-1. Maker Mode Activation ......................................................................................................23
7-5-2. Operating Time Refresh ....................................................................................................23
7-5-3. Alarm Set Value Change ...................................................................................................25
8. Maintenance ............................................................................................................................26
8-1. Inspection Contents and Frequency ....................................................................................26
8-2. Backup/Clock Battery Replacement ....................................................................................28
9. Troubleshooting .......................................................................................................................30
10. Specifications.........................................................................................................................32
11. Warranty ................................................................................................................................33
12. Expected Sensor Life ............................................................................................................33
13. Detection Principle ................................................................................................................34
14. Glossary ................................................................................................................................35
15. Proper Product Disposal at End of Life .................................................................................36

1. Introduction
Thank you for purchasing the New Cosmos KS-7D carbon monoxide detector.
To ensure safe and reliable operation, please read this instruction manual prior to use.
This unit detects the toxic and combustible gas, carbon monoxide. The unit is intended for use in a
non-hazardous indoor area, e.g., office, laboratory, and clean room, for the early detection of a gas
leak and relaying the gas concentration value as an analog signal (4-20mADC) to external
equipment while simultaneously displaying the gas concentration value on its display.
If the gas concentration reaches a preset level, the unit will produce audio-visual alarms and activate
relay contacts, thus helping prevent serious incidents such as gas poisoning.

This manual uses Danger, Warning, Caution and Note symbols to draw attention toprocedures, materials, methods, and processes, which require particular attention.
DANGER : Indicates an imminently hazardous situation that can result indeath or serious injury.
WARNING : Indicates a potentially hazardous situation that may result in deathor serious injury.
CAUTION
NOTE: Indicates a hazardous situation that may result in minor injury orproperty damage.
: Provides information on product handling.

-1-2. General Precautions
Carefully read this manual prior to use.
Follow the precautions below to ensure safe operation.
Only use this product in accordance with the applicable laws and regulations.
Only a qualified electrician with knowledge of wiring and installation procedures should perform
wiring and installation.
WARNINGIn the event of a gas alarm, follow the safety procedures in accordance with yourcompany's regulations.
This product is not explosion-proof and should not be installed in a hazardous area.
Secure the cover by tightening the two fastening screws. Proper gas detection is notpossible if the cover is not tightly closed.
CAUTION
Do not disassemble, modify, or alter the structure of this unit or its electrical circuits.
Doing so may compromise the performance of the product.
This product is not drip-proof and should be kept away from water.
Use the correct orientation as specified in 5. Installation
toensure its proper performance.
Because of its sensor structure, the detector should not be stored in an orientation
other than instructed on the package box. If incorrectly stored, sensor output may
temporarily drop when powered even if installed in the correct orientation. The output
drop may be seen within one week after installation and usually lasts for one hour
before returning to normal. If incorrectly stored for an extended period, the output drop
may last two hours.
When using the d-layermonitoring software, perform a zero suppression setting using the high-layer monitoring
software.
The product s analog output resolution ranges from 250 to 400 (contingent on full scalesetting). Because of the difference in resolution or number of displayed gas
concentration digits between this product and high-layer monitoring software, orconnected impedance, some errors in displayed gas concentration value may be
NOTEOperation during power outage

In the event of a power outage during operation, the detector will cease operation if the
backup battery is not installed. The detector will automatically resume operation once
power is restored, as long as the main power switch, under the cover, is in the on (up)position. A backup battery is included in the package (not pre-installed) when delivered.
Install it into the detector if the detector needs to continue running during a power outage.
If the backup battery level becomes very low while the detector operates on the backup
LCD. If the detector
continues operating while "E-B" is displayed, it will cease operation automatically toprevent over-discharge. In this case, the detector will not automatically resume operationeven if power is restored.
Remove the backup battery from the detector before a planned power outage etc., if thedetector is expected to operate on the backup battery for an extended period of time.
Refer to 8removal/
whether the backup battery installed or removed.
-2-

3. Package Contents
The following items are included in a standard package. If any items are missing or damaged,please contact New Cosmos or its authorized representative for replacement.
Item

Quantity

Description

CO detector

1

KS-7D

Mounting screw

2

M5x12 with spring washer (wall mounting)

Cable tie

1

To be used to bundle electric cables

Pin terminal

9

To be crimped to cables and inserted into the terminal
block

Insulating sleeve9

To be installed in a crimped pin terminal to provide
insulation

Instruction manual

1

This manual

Inspection certificate

1Backup battery

1CR2 lithium battery

1

100 VAC power cable with 2-pin power plug at one end
and two pin terminals at the other end
Length: 2.5 m
Note: AC power cable is not included unless specified at
the time of order, even though your unit has AC power
option.

AC power cable(Optional)-3-4. Unit Dimensions and Components
4-1. Outer Appearance

Dimensions are in mm.

Item

Component

1

Cover

2

Screw cover3

Gas detection port

4

Status indicator(red/amber/green)

5

LCD

6

AL2 alarm LED (red)7

AL1 alarm LED (amber)

Description/Function
Slide up and lift the cover to access to the main power switch and towire external cables. This cover is normally closed.
Houses one mounting screw, and two fastening screws that attach thecover to the unit. This cover is normally closed.
Gas inlet to the CO sensor.
During normal operation all three green internal LEDs are lit. In theevent of an 1st/2nd stage gas alarm, four internal amber/red LEDs
light sequentially.
Displays CO concentration, parameter values, error code, and status
icons.
Flashes red in the event of a 2nd stage gas alarm. The LED will
become solid if reset by pressing the RESET button.
Flashes amber in the event of a 1st stage gas alarm. The LED will
become solid if reset by pressing the RESET button.

8(Up) button

During normal operation, press to display the highest peak value ofgas concentration after powering-up on the LCD.
Used for making settings in combination with other button operation.

9(Down) button

Used for making settings in combination with other button operation.

10

RESET button

During normal operation, press to display the full scale and alarm set
values. Used for muting an on-going audio alarm.

11

POWER button

Press and hold for 3 seconds to turn on/off the detector.
-4-

Item

Component

Description/Function

12

Speaker opening

Opening for audio.

13

Cable entry (3 places)

Make a cutout (cable entry) with a nipper to connect external cables tothe terminals.

14

Maintenance button

Recessed button used for making settings.

4-2. Inner Components

Item

Component

Description/Function
Slide up and lift the cover to access to the main power switch andto wire external cables. This cover is normally closed.
Houses one mounting screw, and two fastening screws that attach
the cover to the unit. This cover is normally closed.
Located under the screw cover.
Screws that attach the screw cover to the unit.

1

Cover

2

Screw cover3

Fastening screw (2 places)

4

Terminal block

Connect to external wiring.

5

Main power switch

Turns on/off the main power.

-5-5. Installation
WARNING
This product is not explosion-proof and should not be installed in a hazardous area.
CAUTION
Avoid strong mechanical shock, impact or vibration to the detector by dropping or
bumping. Failure to do so may impair the performance of the detector.
Do not install the detector in the following conditions.
- Outdoors- Exposure to water spray- Outside the following operating temperature/humidity-5 to +40 °C (no rapid temperature change)
30 to 85% RH (no condensation)- Presence of corrosive gas- Exposure to impact or vibration- Presence of high frequencies or a magnetic field- Exposure to electrical noise
Install the detector in a location that ensures easy access for maintenance.
Install the detector vertically with the sensor on top. Proper gas detection is not possible if
installed inverted, at an angle, or horizontally.
Sensor height should be 75 to 150 cm from the floor unless otherwise required by theapplicable laws or regulations. Install the unit with its gas detection port free from
obstructions.
Secure the cover by tightening the two fastening screws. Proper gas detection is notpossible if the cover is not tightly closed.

NOTE

Leave a distance of more than 30mm from each side of the detector for
removal purpose.
Leave a distance of more than 50mm from the top of the detector to allow thecover to slide open.
Leave enough space for cable wiring below the detector.

-6-

50

Clearance forcover to slide

Mounting holeSensorMounting hole
Cable entry

Dimensions are in mm.

Wall-mount the detector using two M5 mounting screws (pitch: 134) according to the following
procedure.
1. Open the screw cover.
2. Loosely install the mounting screw (top).
3. Loosen the two fastening screws.
4. Slightly pull the cover forward.

Screw cover

1. Open the screw cover

3. Loosen the two fastening screws
2. Loosely install the
4. Pull the cover forward
mounting screw (top)
Cover

-7-

5. Slide the cover up (cover is open).
6. Firmly tighten the mounting screw (bottom) to secure the detector to the wall.
7. Slide the cover down (cover is closed).
7. Slide the cover down

5. Slide the cover up

6. Tighten the mounting
screw (bottom)

8. While pressing down the cover toward the case,
9. tighten the mounting screw (top).
10. Secure the screw cover to the case with the two fastening screws.
11. Close the screw cover.
10. Tighten the two fastening screws
9. Tighten the mounting screw

8. Press down the cover
Case

CAUTION
Secure the cover by tightening thetwo fastening screws. Proper gas
detection is not possible if the cover
is not tightly closed.

-8-6. Wiring
WARNING
Remove any power source during wiring work to prevent electric shocks.
After wiring is completed, close the detector s cover to prevent electric shocks.
CAUTION
New Cosmos is not responsible for the cost or any damage resulting from controllingexternal equipment (e.g., interlock) by using the carbon monoxide concentration outputs(e.g., analog output, alarm relay contact output) from this product.
Connect wires to their corresponding terminals by referring to the marking on the terminal
block.
Keep the connection cable away from the electrical power line.
When using with external devices, isolate the product s 4-20mA analog output from powerlines of external devices in order to prevent inflow current and noise.

The knockout holes for cable entry are provided
on the back and bottom of the unit, and can beremoved using a nipper.
Use a shielded cable (with 0.5 to 1.25 mm2 wires)up to 500 m in length with an outside diameter of
10.5 mm or less.
NOTE

Refer to page 12 for the wiring procedure
for the optional AC power cable.
Refer to 7-3-2
on page 15 for the operation of the backup
battery.
Ex. NO contacts

Signal+Knockout hole on the back

ZA1 ZA2 TA

COM

D C

AC

DC

R

P

S

N
E

E
+

Signal

RN

S

SP

R

ZA1
ZA2

Knockout hole on the bottom+

Power supply
24 VDC or 100 VAC

Earth terminal for grounding the detector+

Analog output
4-20mADC

1st stage gas alarm relay contact(Dry NO or NC)
2nd stage gas alarm relay contact(Dry NO or NC)

TA

Fault alarm relay contact (Dry NO or NC)

COM

CommonDC

Not used

NO: Normally Open

-9-

NC: Normally Closed

6-1. Pin Terminal/Insulated Sleeve Installation
Recommended parts/tools
Part

Model (Manufacturer)

Description
Shielded cable (with 0.5-1.25 mm2 wires)Electric cableOuter diameter: 10.5 mm or less
(Included in package)

Pin terminal

TC1.25-16 (Nichifu)

Insulating sleeve

VC1.25 (Nichifu)(Included in package)

Crimping tool

NH1 (Nichifu)

1.25

Used for 0.25-1.65 mm2 twisted wire

Terminal block (reference)
Part
Power terminal block

Model (Manufacturer)
ML-1400-S1L-3P(Sato Parts)

External output terminal

FFKDSA1/H1-5, 08-8

block

(Phoenix Contact)

Description
Dia. 0.65-1.6 mm
Dia. 0.2-1.5 mm

1. Wire stripping
Strip the wire.
Recommended stripped wire length: 5.5 mm

5.5 mm

2. Pin terminal installation
Insert the stripped wire into a pin terminal until 1 mmof stripped wire can be seen from the end of the pins barrel.

Pin Terminal

3. Terminal crimping
Crimp the center of the barrel.
Barrel4. Insulating sleeve installation
Attach an Insulating sleeve to the crimped pin
terminal.
NOTE

Completely insert the pin terminal into
the insulating sleeve. Not doing so may
cause an insufficient pin length when
wired to the terminal block, which may
result in a poor connection.

- 10 -

Insulating sleeve
Completely insert

6-2. Wire Connection/Disconnection to/from Terminal Block
6-2-1. Power Terminal Block(Connection)

Insert each pin terminal to its
corresponding slot on the terminal block.

(Disconnection)

While pressing the release button with a
precision screwdriver (recommended tip
thickness: 2.6 mm), lift the pin terminal.

6-2-2. External Output Terminal Block(Connection)(Disconnection)

Insert each pin terminal to its
corresponding slot on the terminal block.

While pressing the release button with a
precision screwdriver (recommended tip
thickness: 3.0 mm), lift the pin terminal.

6-3. Cable Tie Installation
Use a cable tie for bundling the in-coming cables through thecable entry and secures wall.
The unit has a cable tie holder inside its case near the bottom.
Pre-install a cable tie by feeding it through the tie holder andmake a loop. To easily bundle the wiring of in-coming cables tothe terminal block, feed these cables through this loop andsecure to the case wall.

Cable tie

Cable entry- 11 -

6-4. AC Power Cable (PC0125) Wiring Procedure
1. Make a cutout (cable entry) on the bottom of
the unit with a nipper.
Note: The knockout holes for cable entry areprovided on the back and bottom of the unit,
and either can be used as cable entry.

2. Install a cable tie by feeding it through thetie holder and make a loop.

Cut here (2 places)
3. Ensure that the insulating sleeves arecompletely installed to the pin terminals of
the AC power cable.

4. Feed the AC power cable through the cableentry and the loop of the cable tie.

5. Insert the pin terminals into the slots(Nos. R and S) on the terminal block.
Note: Either pin terminal can be connected toeither slot.

6. Pull the cable tie to secure the AC power
cable to the case wall. Cut off the excess
strap with a nipper.

- 12 -

7. Operation
7-1. Precautions before Use
WARNING
Before tuning on the unit, confirm that the power supply is:
24 VDC±10% when DC power is used.
100 VAC±10% and 50/60Hz±10% when AC power is used.
CAUTION
Before turning on the unit, check that all wiring is correct. Refer to 6. Wiring or delivery
specifications if provided.
Because of its sensor structure, the detector should not be stored in an orientation otherthan instructed on the package box. If incorrectly stored, sensor output may temporarily
drop when powered even if installed in the correct orientation. The output drop may beseen within one week after installation and usually lasts for one hour before returning tonormal. If incorrectly stored for an extended period, the output drop may last two hours.
Turn on the unit in clean air.
When the sensor output is not stable, the external relay contact may possibly activate
after the warm-up. To prevent possible activation of the external relay contact after the
warm-up is completed, release the interlocks of the external devices, as needed.
During the warm-up, the analog signal output is fixed at 4 mA and the external relay
contacts are disabled.

7-2. Operating Procedure
1) Follow Steps 1, 3, 4, and 5 of 5. Installation
to slide up and open the cover (cover is not
fully opened).
1. Open the screw cover.
3. Loosen the two fastening screws.
4. Slightly pull the cover forward.
5. Slide the cover up (cover is open).

Screw cover

Cover
Main powerswitch2) Set the main power switch to the on (up)position.

Partlyopen- 13 -

3) Follow Steps 7, 8, and 10 of 5. Installation
to close the cover and tighten the screws.
7. Slide the cover down (cover is closed).
8. While pressing down the cover toward the case,
10. Secure the screw cover to the case with thetwo fastening screws.

Status indicator
LCD

CAUTION

POWER button

Secure the cover by tightening thetwo fastening screws. Proper gas
detection is not possible if the cover
is not tightly closed.

4) Press and hold the POWER button for 3 seconds to turn on the detector (two beeps). The threegreen LEDs inside the status indicator start flashing and -- -- -- -- is displayed on the LCD. The
warm-up cycle lasts 90 seconds.

Warm-up operation

Normal operation

5) When the warm-up cycle is completed, the three green flashing LEDs inside the status indicator
become solid, the gas concentration is displayed on the LCD, and normal operation starts.
CAUTION
If the indicated carbon monoxide concentration value is negative when the unit is turned on,turn off the unit for approx. one hour to let the sensor stabilize, then turn the unit on again.
6) Perform an alarm test by referring to 7-4-5. Alarm Test .
Confirm that an alarm activates.
7) To turn off the detector, press and hold the POWER button for 3 seconds to stop the operation,then set the main power switch to the off (down) position.
NOTE

Once the POWER button is turned off, the backup power is not available.
The backup power is activated if the main power switch is turned off, as long as
the POWER button is in the on position.

- 14 -

7-3. LCD Operation
7-3-1. LCD
2

3

5

4

6

7

8
1
Item

11

10

Icon/Display

9
Description/Function

1

Audio alarm icon

Always present

2

AL1 icon

1st stage gas alarm notification

3

AL2 icon

2nd stage gas alarm notification

4

Sensor replacement icon

Sensor needs to be replaced5

Backup battery icon

6

Backup battery level indicator

7

Concentration value and information

8

Unit of measurement

Unit is operating on the backup battery
Battery level of the backup battery used during power
outageCO concentration value, parameter values, error
code, etc.
A unit of gas concentration

9

Clock battery level indicator

Clock battery level is low

10

Alarm history icon

Alarm history is being accessed11

Maintenance mode icon

Maintenance mode is active

Operation buttons

7-3-2. Normal Operation Status
During normal operation the green status indicator is fully lit,
the gas concentration value is displayed on the LCD, and
the AL1 and AL2 alarm LEDs are off.
NOTE

When the detector operates on the backup
battery, unlike when it is driven by 24 VDC
or 100 VAC power supply,
The status indicator is not lit during
normal operation and it sequentially
flashes In the event of a 1st/2nd stage
gas alarm.
The analog output is 0 mA (no output).
The external relay contacts are disabled.
The audio volume is lower.

- 15 -

POWER button
RESET button(UP) button(DOWN) button
Maintenance button

7-3-3. Full Scale and Alarm Set Values Display
Press the RESET button (one beep) to display the full scale concentration , 1st stage gas alarm set
value , and 2nd stage gas alarm set value in sequence.

Full scale: 400 ppm

1st stage gas alarm set value: 50 ppm 2nd stage gas alarm set value: 150 ppm

7-3-4. Peak Value Display and Reset
Press thealternately.

button (one beep). The peak value after powering-up and PEAK will be displayed(Ex. Peak value is 25 ppm)

To return to the normal gas concentration display, press the RESET button (one beep).
The display will show the full scale value and alarm set value, then return to the normal gas
concentration display.
To reset.
The peak value is reset then the display returns to the normal gas concentration display.

7-3-5. Operation during Gas Alarm
When the CO concentration reaches the alarm set value, the alarm LED flashes, the status indicator
sequentially-flashes and an audio alarm sounds.
NOTE

Audio alarm mute: If the RESET button is pressed during a gas alarm, the audio
alarm will be muted and the flashing alarm LED(s) will become solid. If the
RESET button is pressed and held, the alarm will not be muted.

There are two options to clear a gas alarm, manual-resetting and self-resetting. By default, thedetector is set to manual-resetting mode. Please specify the alarm clearance option at the time oforder, if necessary.
The alarm hysteresis range is 2 ppm. The alarm will not be cleared until the gas concentration
exceeds the alarm set value by more than the hysteresis value. E.g., when the alarm set value is
50 ppm and an alarm is activated, the alarm will not be cleared until the concentration reaches 47
ppm or lower.
NOTE

Alarm relay contact reset: If the RESET button is pressed while theconcentration is below the alarm set value, the alarm relay contact will return to
its normal position and the alarm LED will turn off.

- 16 -

< 1st stage gas alarm >Amber AL1 alarm LED flashes and the status indicator sequentially-flashes amber.
Audio alarm beep: Fast, high and low beep tones.
ZA1 alarm relay contact is closed. (When normally open contacts are used)< 2nd stage gas alarm >Red AL2 and A1 alarm LEDs flash and the status indicator sequentially-flashes red.
Audio alarm beep pattern: Very fast high and low beep tones.
ZA2 alarm relay contact closes and ZA1 alarm remains closed. (When normally open
contacts are used)

7-4. User Mode
During the User mode, gas detection, alarm operation, analog output, andcontact output activation are active as during normal operation mode.
However, audio alarm mute and alarm clearance are not active and cannot be
used.
Return to normal operation mode after using the User mode.

NOTE

7-4-1. User Mode Operation
To enter the User mode, press the maintenance button
while the unit is on. After one beep, 1 and its abbreviatedmode name MT will be alternately displayed.
Use a rounded pin (e.g., precision screwdriver) for pressing the maintenancebutton.

NOTE

To select the mode options, use theandbuttons.
To confirm your selection, press the maintenance button. To return to the previous step, press the
RESET button.
To execute the selected mode, press and hold the maintenance button for 3 seconds.
To return to the normal operation mode, press and hold the RESET button for 5 seconds.
Mode
1
2
3
4
5
6

Mode name
Switching the maintenance mode on/off
Zero adjustment
Span adjustment
Alarm test
Alarm history
Clock setting

Abbreviated mode name
MT0 ppm*** ppm
AL T
AL H
DATE

- 17 -

7-4-2. Switching Maintenance Mode On/Off [Mode1]
WARNING

During the Maintenance mode, the external relay contacts and audio alarm are disabled.
Turn off the Maintenance mode during normal operation.

1) Enter the User mode. Press the /button to
select 1 (each press of the button is followed by
one beep). MT and 1 will be alternately
displayed.
2) Press the maintenance button (one beep).
OFF will flash.
button (one beep).
3) Press theON will flash.

4) Press and hold the maintenance button for 3
seconds (beep pattern: short long short short) to
confirm the selection.
The maintenance icon is displayed, and 1 andMT will be alternately displayed, indicating thatthe unit is in the Maintenance mode.
NOTE

If the unit is returned to normal operation mode
while in the Maintenance mode, theconcentration value and _ _ _ _ will be
alternately displayed and the maintenance icon
will remain displayed.

5) To exit the Maintenance mode, take Steps 1) to 4)
above to switch the mode from ON to "OFF".
Confirm the maintenance icon has turned off.

- 18 -

Maintenance icon

7-4-3. Zero Adjustment [Mode 2]
CAUTION
Perform a zero adjustment in clean air that is free from target gas or interfering gases.
Proper gas detection is not possible without a correct zero adjustment.

1) Enter the User mode. Press the /button to
select 2 (each press of the button is followed by
one beep). 0 ppm and 2 will be alternately
displayed.
2) Press the maintenance button (one beep).
The current CO concentration (ppm) will be
displayed.
3)(Ex.Current concentrationis 3 ppm)

Check that there is no gas present. Press andhold the maintenance button for 3 seconds to starta zero adjustment (beep pattern:
short-long-short-short). 0 ppm and 2 will be
alternately displayed, indicating that the zeroadjustment is complete.

7-4-4. Span Adjustment [Mode 3]
CAUTION
Mode 3 (span adjustment mode) is for manufacturer use only. For span adjustment, contact
your New Cosmos representative (fees apply). Proper gas detection is not possible withouta correct span adjustment.

1)

Press the/button to select 3 (eachpress of the button is followed by one beep).
*** ppm (span adjustment concentration)and 3 will be alternately displayed.

- 19 -(Ex. Span adjustment concentration is 400 ppm)

7-4-5. Alarm Test [Mode 4]
When an alarm test is executed, the alarm test value (concentration) will be displayed on the LCD,
and corresponding analog output and alarm outputs (external relay contacts, audio alarm, alarmLEDs) will activate. This will allow the user to test the alarm operation.
NOTE

If the unit is in the Maintenance mode, the external relay contacts and audio
alarm are disabled (alarm LEDs and analog outputs are active).
CAUTIONAn alarm test activates the external relay contacts of the detector. If the detector s external
relay contacts are used to operate the interlocks, etc., of the external devices, release theinterlocks beforehand, as needed to prevent a possible activation of the interlocks. Notify
those concerned before starting an alarm test or inspection.
button to1) Enter the User mode. Press the /select 4 (each press of the button is followed by
one beep). AL T and 4 will be alternately
displayed.
2) Press the maintenance button (one beep).
The current alarm test value (ppm) will be
displayed.

(Ex. Test value iscurrently set to 75 ppm)

3) To change the alarm test value (ppm), press/
button.
the
NOTE

To increase/decrease the test value,/
button. Holding thepress thebutton continuously
increases/decreases the value.

4) Press and hold the maintenance button for 3
seconds to start an alarm test (two beeps).
5) To cancel the ongoing alarm test, press the
RESET button (one beep). The current alarm
test value (ppm) will be displayed.
(Note: If the RESET button is pressed andheld, the alarm will not be cancelled and theunit will return to normal operation mode.)6) To change the test value, repeat Steps 3) to5).
7) Press and hold the RESET button for 5 seconds
to return to normal operation mode.

- 20 -(Ex. Test value ischanged to 150 ppm)

7-4-6. Alarm History [Mode 5]
Up to the 10 most recent alarm events can be displayed (automatically updated).
For each alarm event, the following sequence of information is displayed: peak value (ppm) during
the alarm, starting and ending times (year/month/day/time) of the alarm.
Press the RESET button to return to the previous screen.
button to select1) Enter the User mode. Press the /5 (each press of the button is followed by one beep).
AL H and 5 will be alternately displayed.
2) Press the maintenance button (one beep) to display
the alarm history. The most recent alarm event
number H1 will be displayed. If there is no alarm
history event, INIT will be displayed.
button (each press of the button is3) Use thefollowed by one beep) to select (display) the desired
alarm event from H1 to H10.
NOTE

(No alarm events)(Ex. H1 is selected)

Each press of the
button cycles through alarm events. The sequenceis H1, H2, through H10, and INIT. To delete the alarm history, select INIT ,then press and hold the maintenance button for 3 seconds (beep pattern:
short long short short).

4) Press the maintenance button (one beep).
AL with history icon and the peak value(ppm) during alarm of the selected alarm
event are alternately displayed.

History mark(Ex. Alarm peak value is 164 ppm)

button cycles through the details of the selected alarm event. The
5) Each press of thesequence is: starting year, date, and time and ending year, date, and time of the event.

(Start of alarm)(Start of alarm)(Start of alarm)(End of alarm)(Year)(Month(End of alarm)Day)(Time)(End of alarm)- 21 -(Year)(MonthDay)(Time)

6) Press the RESET button (one beep) to display theselected alarm event number H * .
To display other alarm event, repeat Steps 3) to 5).
(Ex. H1 is selected)

To delete the alarm history, select INIT in Step 3),
then press and hold the maintenance button for 3
seconds (beep pattern: short long short short).
The deletion is complete.

7-4-7. Clock Setting [Mode 6]
Clock is used when recording the alarm history.
button to select1) Enter the User mode. Press the /6 (each press of the button is followed by one beep).
DATE and 6 will be alternately displayed.
2) Press the maintenance button (one beep). YEAR
and * * * * (year) will be alternately displayed.
/
button. The
3) Select the item to change with theitem and its currently set value will be displayed.
NOTE

Each press of the
button cycles through: YEAR , MON (month), DAY ,HOUR and MIN (minute).

When selecting YEAR , for example,
4) Press the maintenance button (one beep). The currently
set year will be displayed.
5) Change the set value by using the/(Ex. Year is currently
set to 2013)

button.

(Ex. Changed from 2013 to 2014)6) Press and hold the maintenance button for 3 seconds
to confirm the change (beep pattern: short long short
short). YEAR and the set year will be alternately
displayed.

(Confirmed)

7) To change the other items, repeat Steps 3) to 6).
8) Press and hold the RESET button for 5 seconds (twobeeps) to return to normal operation mode.

- 22 -(Back tonormal operation mode)

7-5. Maker ModeAll the items set in the Maker mode (e.g., alarm set value) are password-protected.
WARNING
Incorrect settings in the Maker mode may change the detector s specifications. Never
operate in a way other than as described in this instruction manual.
Only a selected administrator should have the authority to make changes in the Maker
mode.
Gas detection is not possible during the Maker mode. To exit the Maker mode and return
to normal operation, power cycle the unit before use.

7-5-1. Maker Mode Activation
First, turn off the detector. Simultaneously press and hold down theandand POWER
buttons for 3 seconds (two beeps) to activate the Maker mode. The software version is displayedthen all the LCD segments turn on, and finally 775 starts flashing. Now the Maker mode is active.

MaintenancebuttonSoftware version isdisplayed

All LCD segments
turn on775 flashes<Maker Mode activates>

Main power switch

7-5-2. Operating Time RefreshThis detector is designed to notify when a sensor needs replacement by referring to 8-1.6) Sensor
Replacement . Reset the operating time to zero after battery replacement.
1) Read 7-5. Maker Mode including the WARNING
beforehand. Enter the Maker mode. Now 775 is
flashing.
button twice (two beeps) to change the2) Press the
password from 775 to 777. Now 777 is flashing.

775 flashes

WARNING
Before moving to the next step, 777 must be
displayed. If this step is not taken, it may change
the detector s specifications.

- 23 -

777 flashes

3) Press the maintenance button (one beep). 4mA will
be displayed.
NOTE

Use a rounded pin (e.g., precision
screwdriver)forpressingthemaintenance button.

button (one beep). The total operating
4) Press thetime will be displayed in hex notation.
WARNING
Before moving
total operatingtime must be displayed. If this step is not taken, it
may change the detector s specifications.

NOTE(Ex. Total operating time is 66A8 or 3 years)

through the details of total operatingtime. The sequence is shown below.

Total operating time5) Press and hold the maintenance button for more than
3 seconds (beep pattern: short long short short).
The operating time will be reset to 0 .
NOTE

If the operating time refresh is not
successful, two beeps are heard and thevalue does not become 0 . In this case,press and hold the POWER button for 3
seconds to turn off the unit, then repeat theprocedure. If the unit still fails to refresh,
contact your New Cosmos representative
for repair.

6) To end the refresh, press and hold the POWER
button for 3 seconds to turn off the unit.

- 24 -(Total operating time is reset)

7-5-3. Alarm Set Value Change
1) Read 7-5. Maker Mode including the WARNING
beforehand. Enter the Maker mode. Now 775 is
flashing.
2) Press the maintenance button (one beep). AL 1 will be
displayed and the AL1 alarm LED will turn on.

3) Use thestage.
NOTE/

775 flashes

button (one beep) to select the alarm

Each press of the/
buttonalternates between AL 1 and AL 2 .
(1st stage gas alarm)(2nd stage gas alarm)

4) Press the maintenance button (one beep) to confirm theselection. The current alarm set value for the selectedalarm stage will be displayed.
(Ex. AL1 alarm set value
Is currently set to 50 ppm)

5) Change the alarm set value by using the/

button.

6) Press and hold the maintenance button for more than 3
seconds (beep pattern: short long short short) for
confirmation. The new alarm set value has been set andAL1 or AL2 is displayed.
NOTE(Ex. Changed to 25 ppm)

If the alarm set value change is not
successful, two beeps are heard and theprevious set value remains displayed. In thiscase, press and hold the POWER button for
3 seconds to turn off the unit, then repeat
the procedure. If the unit still fails to change
the alarm set value, contact your New
Cosmos representative for repair.

7) To change another alarm set value, repeat Steps 3) to 6).
8) To end the procedure, press and hold the POWER button for 3 seconds to turn off theunit.
9) Press and hold the POWER button for 3 seconds to restart the unit in normal operation
mode. Check the alarm set values. (Refer to 7-3-3. Full Scale and Alarm Set Value
Display .)- 25 -

8. Maintenance
Daily checks are carried out by the user, while monthly and annual inspections are performed by theuser, New Cosmos or its authorized representative.

Important Notice for MaintenanceIn order to ensure the reliability of the gas detector, it is vital to perform periodic span
adjustment on the gas sensor. It is highly recommended that a maintenance contract with alocal New Cosmos representative be made for the performance of scheduled sensor
adjustment and replacement.

8-1. Inspection Contents and Frequency
Check items

Start-up

Expansionor
relocation

Periodic Inspection
Monthly

Annually

Daily
check

1) Concentration display2) Backup battery level*13) Alarm test
4) Zero adjustment *25) Span adjustment (gas calibration)*36) Sensor replacement

Every 3 years*1. Regardless of the battery level, the first battery replacement should be done within 3 years from the purchasedate. Succeeding replacements should be done every 3 years.
*2. Perform a zero adjustment in clean air that is free from target gas or interfering gases.
*3. The first sensor replacement should be done within 3 years from the purchase date. Succeeding replacements
should be done every 3 years. Contact your New Cosmos representative for sensor replacement (fees apply).

1) Concentration Display
Check that the CO concentration is displayed on the LCD and that the detector operates
properly.
2) Backup Battery Level
Check the backup battery level on the LCD. If the low battery icon
appears (indicating
70 hours or less of operation), then battery replacement is recommended.
The unit can continuously operate for about 350 hours with a new backup battery (at 20°C,
with no alarm activation and backlight being off).
NOTE

Backup powering is not possible while the empty battery alert iconisflashing. A low battery does not affect the detector s operation, but replace thebattery or remove it from the unit in order to prevent possible battery leakage.
If a gas alarm occurred while the backup battery was being used, a significant
amount of battery was consumed. Battery replacement is recommended.
Even though the backup battery was unused, replace it every 3 years to prevent
possible battery leakage. (Replace the clock battery every 10 years regardless of
its battery level.)
Refer to 8-2. Sensor/Backup Battery/Clock Battery Replacement for battery
replacement procedure.
- 26 -

3) Alarm Test
Check that an alarm activates correctly by referring to 7-4-5. Alarm Test .
CAUTION
Perform an alarm test in accordance with the applicable local laws and regulations. For
example, the applicable law in Japan specifies that alarm activation must be checked by
performing a circuit check once every month.
An alarm test activates the external relay contacts of the detector. If the detector s
external relay contacts are used to operate the interlocks, etc., of the external devices,
release the interlocks beforehand, as needed to prevent a possible activation of theinterlocks. Notify those concerned before starting an alarm test or inspection.

4) Zero Adjustment
Check that the displayed concentration is 0 ppm while in clean air.
If 0 ppm is not displayed, perform a zero adjustment by referring to 7-4-3. Zero Adjustment .
5) Span Adjustment (Gas Calibration)
To ensure reliable gas sensor performance, perform a span adjustment at least once a year.
CAUTION
Contact your New Cosmos representative for span adjustment or sensor replacement(fees apply). Proper gas detection is not possible without correct adjustments.
6) Sensor Replacement
It is highly recommended to replace the sensor every three years when used in a normal
environment. However, if any abnormality, e.g., a significant decrease in sensor sensitivity, isfound during a periodic inspection or daily check, the sensor needs to be replaced. Contact your
New Cosmos representative for sensor replacement.
NOTE

Even if the detector is unused for a long period of time, replace the sensor three
years from the purchase date. Contact your New Cosmos representative forsensor replacement (fees apply).
This detector counts each hour while it is on. When the total operating timereaches three years, sensor replacement alert will be notified by audio alarm andonscreen indication. The audio alarm sounds at a one-minute interval. To mutethe audio alarm, press the RESET button. The muted audio alarm will become
audible, once the detector is power cycled. To mute the resumed audio alarm,press the RESET button.
* The sensor replacement alert is set to on by default when shipped out, and it can bemuted if specified. Please specify the mute option at the time of order, if necessary.
Onscreen sensor replacement alert is always set to on regardless of the audio setting.

- 27 -

8-2. Backup/Clock Battery Replacement
CAUTIONUse a CR2 lithium battery, cylindrical type for backup battery.
Use a CR2032 lithium battery, coin type for clock battery.
1. Press and hold the POWER button for 3 seconds to turn off the detector.
2. Open the screw cover.
3. Loosen the two fastening screws (these screws cannot be fully removed).
2
3
4. Slightly pull the cover forward.
41

5. Slide the cover up by holding Part A (2 places, each side of the cover) until the middle alignment
markings on Part A and the alignment markings on Part B match.
6. Turn off the main power by setting the main power switch to the off (down) position.
CAUTION
Turn off the detector s main
power to avoid electric shocks.

5

6

OPart B(2PL)

O
Part A(2PL)

7. Pull and detach the cover from the case by holding Part C (2 places, each side of the cover).
CAUTION Cover and case are connected with a connector cable.

Cover
Case

CAUTION
7. Lift

Part C(2PL)

Take care to prevent
breaking the connector
cable between the caseand the cover.
- 28 -

8. Temporarily hang the cover on the top of the case by engaging the cover s Part E into the case sPart D.
Top of the casePart ETop of the coverPart DEngaged8. Hang

Oxygen sensor

9. Remove backup battery
Leave more than 3 seconds
10. Replace sensor
11. Install backup battery
Clock battery
Backup battery

9. Replace the backup battery/clock battery with a new one.
CAUTION
Correctly install a battery by checking the polarity marking on the battery holder.
10. (Reverse Step 8) Pull and detach the case from the top of the case by holing the Part C (2places, each side of the cover). Align Part A to Part B (2 places, each side of the cover) toengage the cover into the case.
11. Turn on the main power by setting the main power switch to the on (up) position
12. (Reverse Step 5) By holding Part A (2 places, each side of the cover), match the middlealignment markings on Part A and the alignment markings on Part B, slide down and close thecover.
13. Press up and open the screw cover. Tighten the two fastening screws.
CAUTION
Secure the cover by tightening the two fastening screws. Proper gas detection is not possible
if the cover is not tightly closed.
14. Close the screw cover.
- 29 -

9. Troubleshooting
Before requesting repair, please refer to the table below. If the detector does not return to normal
operation after performing the corresponding steps in the table, or if your issue is not found in the table,
consult New Cosmos or its authorized representative.
Problem

Probable cause

Solution

Reference section

Set the main power switch
Main power switch or

to on position or press and

POWER button is off

hold the POWER button for
3 seconds.

Green status indicator notlit

7-2. Operating Procedure

Incorrect wiring or loose

Check and

connection

rewire/reconnect.

No power supplied

Supply correct power.

Product is in Maintenance

Switch the Maintenance

7-4-2. Switchingmode

mode to OFF.

Maintenance Mode On/Off

Product is in Maintenance

Switch the Maintenance

7-4-2. Switchingmode

mode to OFF.

Maintenance Mode On/Off

Incorrect alarm set value

Check the alarm set value.

6. Wiring
7-1. Precaustions before
Use

Maintenance icon
displayed on LCD, andgas concentration value
and _ _ _ _ displayedalternately

No audio alarm

Non-audio unit selected attime of order

7-3-3. Full Scale and Alarm
Set Value Display

Consult your New Cosmos representative.

Product is in Maintenance

Switch the Maintenance

7-4-2. Switchingmode

mode to OFF.

Maintenance Mode On/Off

Incorrect wiring or loose

Check and

connection

rewire/reconnect.

Incorrect alarm set value

Check the alarm set value.

Detector operates on theThis is not a failure and the7-3-2. Normal Operation

backup battery

detector operates normally.

Status

6. Wiring

Alarm relay contacts do
not activate- 30 -

7-3-3. Full Scale and Alarm
Set Value Display

Problem

Probable cause

Solution

Reference section

Contact yourrepresentative for sensor
replacement.
Sensor replacement
icon displayed on LCD
Once a minute sensor
replacement audio

Total operating time hasreached three years, andthe sensor replacement
alert is activated.

alarm

To mute the audio alarm,press he RESET button.
The muted audio alarm will

8-1. 6) Sensor
Replacement

become audible, once thedetector is power cycled.
To mute the resumed audio
alarm, press the RESET
button.
Press and hold the

Status indicator flashing

POWER button for 3

between green and red--

seconds to turn off the-detector. After a few

displayed on LCD
Audio alarm sounds

Internal error

Fault alarm relay contact

minutes, turn the detector
on again. If the product7-2. Operating Proceduredoes not return to normal

activates

operation, contact yourAnalog output is lower

New Cosmos

than 0.9 mA

representative for repair.
-

may be displayed

within a week after-

installation, then the unit-

displayed on LCD
Analog output is lesswill automatically return to
Sensor Error

normal after approx. one

2. General Precautions

hour. If the unit fails tothan 0. 9mA

return to normal, contact
your New Cosmos
representative for repair.
Replace the backup battery
with a new one.

Audio alarm sounds

Backup battery is empty

Pressing the RESET button
can mute the audio alarm

8-2. Backup Battery/Clock
Battery Replacementfor one hour.
Turn off the detector andremove the backup battery
from the unit, then reinstall.
Other than the above

7-2. Operating Procedure

Microcomputer may

Turn on the detector. If themalfunction due to noise.

product does not return to

8-2. Backup Battery/Clocknormal operation, contact

Battery Replacement

your New Cosmos
representative for repair.

- 31 -

10. Specifications
Detection principle

Electrochemical sensor

Sampling method
Target gas

Diffusion type
Carbon Monoxide

Display

0-400 ppm
(Service range: F.S. value to 1,000 ppm)
Four-digit LCD with backlight, resolution 1 ppm

Alarm set value (AL1/AL2)
Indication accuracy *1

F.S. 400 ppm: 50/150 ppm+/- 30% of the alarm set value

Alarm delay

Alarm is triggered in less than 60 seconds after exposure to test gas(80 ppm)

Alarm

Gas alarm (in two stages)
1st stage gas alarm: AL1 alarm LED flashes (lit if the audio alarm ismuted), amber status indicator sequentially-flashes, audio alarmsounds, and AL1 icon is displayed on LCD.
2nd stage gas alarm: AL1 and AL2 alarm LEDs flash (lit if the audio
alarm is muted), red status indicator sequentially-flashes, audio
alarm sounds, and AL1 and AL2 icons are displayed on LCD.
Alarm clearance method: Manual-resetting (standard) or
self-resetting*3

External output *4

Gas concentration analog output *2: 4-20mADC (common negativewithincluding a wiring resistance)
Gas alarm relay contacts (in two stages): Dry NO (standard) or NC
contacts, manual-resetting (standard) or self-resetting *3(Max load: 0.5 A at 125 VAC or 2 A at 30 VDC (resistance load)
Fault alarm relay contact: Dry NO (standard) or NC contact,
manual-resetting (standard) or self-resetting *3(Max load: 0.5 A at 125 VAC or 2 A at 30 VDC (resistance load)

Explosion-proof

Not explosion-proof

Compliance *5

EMC:2014/30/EU/SI 2016 No.1091
RoHS:2011/65/EU+(EU)2015/863/SI 2012 No.3032

Detection range

Applicable cable

Maintenance mode used to disable gas alarm relay contacts, audio
alarm mute, and backup battery used in the event of power outage
0.5-1.25 mm2 shielded cable. Outer diameter: less than 10.5 mm

Cable length

Up to 500 m

Operating temperature andhumidity

5 to +40°C, 30 to 85%RH(No rapid temperature/humidity changes. No condensation)

Power supply

24 VDC±10% or 100 VAC±10% 50/60Hz±10% *3
24 VDC: 1 W during normal operation, 3 W during alarm, or
100 VAC: 2 VA during normal operation, 6 VA during alarm

Other features

Power consumption
Dimensions
Mass

W82 x H150 xD35 mm (excluding protruding parts)
Approx. 300g

Mounting method

Wall mounting, indoors*1. Under identical measurement conditions.
*2. Output concentration value is within the detection range.
*3. Manual-resetting or self-resetting; NO (normally open) or NC (normally closed) are specified at the time of order.
*4. When the detector operates on the backup battery, the analog output is 0mA (no output) and the gas/fault alarm relay
contacts are all disabled.
*5. CE marking specification applies to KS(separate document) for information on the CE marking unit.

- 32 -

11. Warranty
The warranty period is one (1) year from the date of purchase.
You are entitled to the limited warranty, if the product malfunctions due to a manufacturing defectduring normal use in accordance with the instruction manual, specifications and labels.
Warranty Scope
If the product fails or is found to be damaged due to a manufacturing defect during the warranty period,
and used in accordance with the instruction manual and specifications, we will provide a freereplacement or repair service. This warranty covers the New Cosmos product/parts only and not third
party product/parts.
Warranty Exclusions
The following will be repaired at the cost of customer even during the warranty period.
(1) Failures and damages incurred by incorrect use, deliberate acts or negligence of the user.
(2) Failures and damages caused by disaster, earthquake, storm and flood, lightning, extreme climate,abnormal power supply voltage, excessive electromagnetic interferences, or other acts of God.
(3) Failures and damages resulting from repair and/or modification by non-New Cosmos certified
technicians.
(4) Consumables and failures and damages resulting from improper consumable replacement.
(5) Other failures and damages not attributable to the manufacturer.

12. Expected Sensor LifeThe estimated service life of the sensor is shown in the table below. The sensor may fail to provide
correct detection after its service life expires. Replace the sensor before its expiration. This
expected service life assumes that maintenance is done properly and periodically and that thesensor is not exposed to high concentration gas or gas that may cause sensor poisoning. This does
not imply that the sensor will provide correct detection values up to the end of the service life. Thus,
no warranty will be given after the one-year period is over.
Detection principle

Expected sensor life

Electrochemical

3 years- 33 -

13. Detection Principle
Electrochemical Sensor

Working electrode (Pt)Electrolyte(Solid or liquid)(OH- passes throughbacking layer)

Counter electrode (Pt)

Sensor consists of a working electrode (noble metal), a counter electrode and an electrolyte.
When the CO reaches the working electrode, electrons are generated resulting from the reaction
between CO and anions in the electrolyte such as OH- (see equation 1). By creating a short circuit
between the working and counter electrodes with external wiring, electrons move to the counterelectrolyte through the external wiring. At that point, the consumed anions in the electrolyte at theworking electrode are replenished and move to the electrolyte by the reaction of CO2, water, andelectrons as shown in equation 2.The total reaction is expressed as shown in equation 3. Measuring
the current generated here allows determining the concentration of CO gas.
CO + 2OH--> CO2 + H2O + 2e(1/2) O2 + H2O + 2e-->
2OHCO + (1/2) O2--> CO2(equation 1)(equation 2)(equation 3)- 34 -

14. Glossary
TermDefinition

Clean air or
normal air

Standard atmosphere which contains 20.9 to 21.0% oxygen in dry condition or
atmosphere without target gas or interference gases.

Gas detector

Device used to detect the presence of a target gas and to give its concentration in
the form of an electrical signal.

Diffusion type

Sampling method using convective diffusion while placing a gas detector at a
detection point.

Target gas

Specific gas to be detected, concentration displayed, and used to trigger alarms.

Detection range

A range of target gas concentrations that can be displayed and trigger alarms.

Service range

A range of target gas concentrations the detector is able to indicate, which areusually outside the Detection Range and used only as reference.

Alarm set value

Preset gas concentration level at which an alarm is triggered.

Alarm accuracy

Difference between the alarm set value and gas concentration value at which an
alarm is actually triggered, or percentage of the difference compared to the alarm
set value.

Alarm delay

Time required for an alarm to trigger after the detector is exposed to a gas
concentration level, higher or lower than the alarm set value.

Operatingtemperature andhumidity ranges

Ambient temperature and humidity ranges in which the gas detection and alarmsystem can operate normally.

Maintenance andinspection

Tasks performed to ensure that equipment operates normally and correctly.

Self-resetting

Gas alarm clearance method. When the gas concentration falls below (or above
when the alarm set value is the lower limit) the gas alarm set value after an alarm
has been signaled, relevant alarm lights, gas alarm icon and alarm relay contacts
will automatically return to their normal positions/statuses.

Manual-resetting

Gas alarm clearance method. Even if the gas concentration falls below (or above
when the alarm set value is the lower limit) the gas alarm set value after an alarm
has been signaled, relevant alarm lights, gas alarm icon, and alarm relay contacts
will not automatically return to their normal positions/statuses. Manual operationis only possible when the gas concentration is below (or above) the gas alarm set
value.

Hazardous area

An area in which an explosive atmosphere is present, or may be expected to bepresent, in quantities such as to require special precautions for the construction,
installation and use of electrical apparatus.

Explosive
atmosphere

Mixture of air and flammable substances in the form of dust or vapor which arewithin their explosive limits.

Sequentially-flash

There are several LEDs inside the status indicator. In the event of a gas alarm,
one LED lights at a time and the lit LED moves from left to right.
- 35 -

15. Proper Product Disposal at End of Life
The Waste Electrical and Electronic Equipment WEEE directive 2012/19/EU
is intended to promote recycling of electrical and electronic equipment and theircomponents at end of life. This symbol crossed-out wheeled bin indicatesseparate collection of waste electrical and electronic equipment in the EU countries.
This product contain two Lithium batteries. Specific battery information is given inthis instruction manual. Batteries must be recycled or disposed of properly.
At the end of its life, this product must undergo separate collection and recyclingfrom general or household waste. Please use the return and collection system
available in your country for the disposal of this product.

- 36 -

Document No.
GAE-053-00
GAE-053-01
GAE-053-02
GAE-053-03
GAE-053-04
GAE-053-05
GAE-053-06

Revision History
Date
July 2014
May 2016
October 2018
June 2019
December 2020
September 2022
June 2023

Revision
0
1
2
3
4
5
6

Additional copies of this instruction manual may be purchased.
Contact New Cosmos or its authorized representative for ordering.

Authorized representative:

Manufacturer:
NEW COSMOS ELECTRIC CO., LTD.
2-5-4 Mitsuya-naka, Yodogawa-ku,
Osaka 532-0036, Japan
www.newcosmos-global.com