New Cosmos Electric KS-7O User manual
Oxygen Detector
KS-7O
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-specific
options, this manual will be superseded by your delivery specifications.
Instruction Manual No.
GAE-052-06
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 ........................................................................................................................................ 9
6-1. Pin Terminal/Insulating 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 (21.0vol% 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 ...................................................................................................24
8. Maintenance ............................................................................................................................26
8-1. Inspection Contents and Frequency ....................................................................................26
8-2. Sensor/Backup Battery/Clock Battery Replacement............................................................28
9. Troubleshooting .......................................................................................................................31
10. Specifications.........................................................................................................................33
11. Warranty ................................................................................................................................34
12. Expected Sensor Life ............................................................................................................34
13. Detection Principle ................................................................................................................35
14. Glossary ................................................................................................................................36
15. Proper Product Disposal at End of Life .................................................................................37
- 1 -
1. Introduction
Thank you for purchasing the New Cosmos KS-7O oxygen detector.
To ensure safe and reliable operation, please read this instruction manual prior to use.
This unit detects oxygen leakage/deficiency in working environments, e.g., semiconductor
manufacturing plants and laboratories, and relays the oxygen concentration value as an analog
signal (4-20mADC) to external devices while simultaneously displaying the concentration value on
its display.
Oxygen levels are monitored, and if the concentration reaches a preset level, the unit will produce
audio/visual alarms and activate relay contacts.
This manual uses Danger, Warning, Caution and Note symbols to draw attention to
procedures, materials, methods, and processes, which require particular attention.
: Indicates an imminently hazardous situation that can result in
death or serious injury.
: Indicates a potentially hazardous situation that may result in death
or serious injury.
: Indicates a hazardous situation that may result in minor injury or
property damage.
: Provides information on product handling.
DANGER
CAUTION
WARNING
NOTE
- 2 -
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.
In the event of a gas alarm, follow the safety procedures in accordance with your
company'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 not
possible if the cover is not tightly closed.
WARNING
Operation 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 to
prevent over-discharge. In this case, the detector will not automatically resume operation
even if power is restored.
Remove the backup battery from the detector before a planned power outage etc., if the
detector is expected to operate on the backup battery for an extended period of time.
Refer to 8- removal/
ill not be affected
whether the backup battery installed or removed.
NOTE
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.
-layer
monitoring software, perform a 21% suppression setting using the high-layer monitoring
software.
ranges from 250 to 500 (contingent on full scale
setting). Because of the difference in resolution or number of displayed gas
concentration digits between this product and high-layer monitoring software, or
connected impedance, some errors in displayed gas concentration value may be
observed.
If the fault threshold needs to be set via analog output, set it to 1.0 mA.
To comply with JIS T 8201:2010 (Japanese Industrial Standard), your unit should be
configured for manual-resetting. Specify manual-resetting type at time of order. If a
self-resetting type is chosen and manual-resetting is maintained using a high-layer
system, a self-resetting type of detector can be used to comply with this standard.
CAUTION
- 3 -
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
Oxygen detector 1 KS-7O
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 sleeve 9 To be installed in a crimped pin terminal to provide
insulation
Instruction manual 1 This manual
Inspection certificate 1
Backup battery 1 CR2 lithium battery
AC power cable
(Optional) 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.
- 4 -
4. Unit Dimensions and Components
4-1. Outer Appearance
Item Component Description/Function
1 Cover
Slide up and lift the cover to access to the main power switch and to
wire external cables. This cover is normally closed.
2 Screw cover Houses one mounting screw, and two fastening screws
that attach the
cover to the unit. This cover is normally closed.
3 Gas detection port Gas inlet to the oxygen sensor.
4 Status indicator
(red/amber/green)
During normal operation all three green internal LEDs are lit.
In the
event of an 1st/2nd stage gas alarm, four internal amber
/red LEDs
light sequentially.
5 LCD Displays oxygen concentration, parameter values, error code,
and
status icons.
6 AL2 alarm LED (red) Flashes red in the event of a 2nd stage gas alarm. The LED
will
become solid if reset by pressing the RESET button.
7 AL1 alarm LED (amber) 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 of
oxygen concentration after powering-up on the LCD.
Used for making settings in combination with other button operation.
9 (Down) button
During normal operation, press to display the lowest
peak value of
oxygen concentration after powering-up on the LCD.
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.
12 Speaker opening Opening for audio.
13 Cable entry (3 places)
Make a cutout (cable entry) with a nipper to connect external cables to
the terminals.
14 Maintenance button Recessed button used for making settings.
Dimensions are in mm.
- 5 -
4-2. Inner Components
Item Component Description/Function
1 Cover Slide up and lift the cover to access to the main power switch and
to wire external cables. This cover is normally closed.
2 Screw cover Houses one mounting screw, and two fastening screw
s that attach
the cover to the unit. This cover is normally closed.
3 Fastening screw (2 places) Located under the screw cover.
Screws that attach the screw cover to the unit.
4 Terminal block Connect to external wiring.
5 Main power switch Turns on/off the main power.
- 6 -
5. Installation
This product is not explosion-proof and should not be installed in a hazardous area.
WARNING
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 the
cover to slide open.
Leave enough space for cable wiring below the detector.
NOTE
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
-10 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.
For detecting oxygen deficiency, the detector should be installed at head height in a place
free from obstruction to the gas detection port.
When used in a measurement environment where the atmospheric pressure is different
from the standard atmospheric pressure, e.g., at a high altitude, the measurement value
should be adjusted to compensate for the oxygen sensor s pressure dependence.
Secure the cover by tightening the two fastening screws. Proper gas detection is not
possible if the cover is not tightly closed.
CAUTION
- 7 -
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.
2. Loosely install the
mounting screw (top)
3. Loosen the two fastening screws
4. Pull the cover forward
Cover
1. Open the screw cover
Screw cover
Mounting hole
50
Sensor
Space for
cover to slide
Cable entry
Mounting hole
Dimensions are in mm.
50
Mounting hole
- 8 -
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).
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.
5. Slide the cover up
6. Tighten the mounting screw (bottom)
7. Slide the cover down
CAUTION
Secure the cover by tightening the
two fastening screws. Proper gas
detection is not possible if the cover
is not tightly closed.
10. Tighten the two fastening screws
Case
9. Tighten the mounting screw
8. Press down the cover
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