Riken Keiki CO2RK-Lite User manual

PT2E-3380
CO2Monitor
CO2RK-Lite
Operating Manual

Contents
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Contents
1. Product Overview .........................................................................................................................................................4
1-1. Introduction .........................................................................................................................................................4
1-2. Intended use .......................................................................................................................................................5
1-3. DANGER, WARNING, CAUTION, and NOTE...................................................................................................6
1-4. Checking markings .............................................................................................................................................7
2. Important Safety Information ........................................................................................................................................8
2-1. Warning information............................................................................................................................................8
2-2. Caution information.............................................................................................................................................9
2-3. Radio law certification...................................................................................................................................... 10
2-4. Installation precautions .................................................................................................................................... 13
3. Product Configuration................................................................................................................................................ 15
3-1. Main unit and standard accessories................................................................................................................ 15
3-2. Part names and functions................................................................................................................................ 16
3-3. Display ............................................................................................................................................................. 18
4. Usage Instructions..................................................................................................................................................... 20
4-1. Turning the power on and off........................................................................................................................... 20
4-2. Checking the carbon dioxide concentration (LCD display) ............................................................................. 21
4-3. Turning the buzzer on and off.......................................................................................................................... 22
4-4. Checking the peak reading and changing alarm setpoints ............................................................................. 22
5. Functions ................................................................................................................................................................... 24
5-1. Alarm activation (Ventilation alert function) ..................................................................................................... 24
5-2. Fault alarm activation....................................................................................................................................... 25
5-3. Automatic adjustment function ........................................................................................................................ 26
5-4. Smartphone app .............................................................................................................................................. 27
6. Storage and Disposal ................................................................................................................................................ 28
6-1. Procedures for storage or when not in use for extended periods ................................................................... 28

Contents
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6-2. Product disposal .............................................................................................................................................. 28
7. Troubleshooting ......................................................................................................................................................... 29
8. Product Specifications ............................................................................................................................................... 31
8-1. Specifications list ............................................................................................................................................. 31
8-2. Product warranty.............................................................................................................................................. 32

1. Product Overview 1-1. Introduction
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1
Product Overview
1-1. Introduction
Thank you for purchasing the CO2RK-Lite (“the product” hereinafter).
This operating manual describes how to use the product correctly. Make sure you read and fully understand all the
information provided in this operating manual before use.
The contents of this operating manual are subject to change without notice to allow product improvements. Any
unauthorized duplication or reproduction of this operating manual is prohibited, whether in whole or in part.
Regardless of the warranty period, Riken Keiki does not accept any liability for accidents or damage resulting from
use of the product.
Be sure to read the warranty policy set forth on the warranty.

1. Product Overview 1-2. Intended use
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1-2. Intended use
The product is designed to monitor carbon dioxide concentrations in indoor environments. The product displays
carbon dioxide concentrations on the LCD screen and alerts the user via the LCD screen color (green, orange, or
red) and a buzzer if carbon dioxide concentrations reach alarm setpoints set within the detection range (ventilation
notification concentrations).
The product incorporates a nondispersive infrared absorption (NDIR) sensor. The sensor reacts directly to carbon
dioxide concentrations within indoor environments. It adopts a measurement principle unaffected by interference from
sterilizing alcohol such as ethanol.
The product is available in both Bluetooth® and non-Bluetooth® models. The Bluetooth® model allows viewing of
carbon dioxide concentrations on the app screen of smartphones or other devices.
Check the markings on the model as described in ‘1-4. Checking markings’ to confirm the product version before use.
The product is not an analyzer designed to perform quantitative analysis/measurement or qualitative analysis of
gases. Use it appropriately for your intended purposes.

1. Product Overview 1-3. DANGER, WARNING, CAUTION, and NOTE
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1-3. DANGER, WARNING, CAUTION, and NOTE
This operating manual uses the following categories to indicate potential damage/hazards if the user disregards the
information provided and uses the product incorrectly:
DANGER This indicates situations in which improper handling may result in fatal or
serious injury or significant property damage.
WARNING This indicates situations in which improper handling may result in serious
injury or significant property damage.
CAUTION This indicates situations in which improper handling may result in minor
injury or minor property damage.
Additionally, usage recommendations are indicated as follows:
NOTE This indicates items that will be helpful to know when using the product.

1. Product Overview 1-4. Checking markings
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1-4. Checking markings
The nameplate affixed to the product provides various markings (CE marking, FCC ID, technical compliance
marking). Check the actual product specifications before use. For CE marking models, please refer to the
‘Declaration of Conformity’ provided at the end of this manual.
Nameplate
location
CE
marking
Bluetooth® model
Non-Bluetooth® model
Technical compliance
marking
FCC ID

2. Important Safety Information 2-1. Warning information
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2
Important Safety Information
To maintain product performance and to ensure safe use, always observe the following WARNING and CAUTION
instructions:
2-1. Warning information
W
ARNING
Do not pull, clamp, twist, or otherwise apply stress to the cable.
Do not disassemble or modify the product. Any attempt to disassemble or modify the product will void
product performance guarantees.
Use the product only as described in this operating manual.
Do not use the product with control devices or other equipment.
Use the AC adapter provided.
The product is available in both Bluetooth® and non-Bluetooth® models.
For information on Bluetooth® wireless communication, refer to ‘2-3. Radio law certification’.
W
ARNING
If an abnormality is discovered in the product, contact Riken Keiki immediately. Visit our website for
information on the nearest Riken Keiki office.
Website: https://www.rikenkeiki.co.jp/

2. Important Safety Information 2-2. Caution information
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2-2. Caution information
CAUTION
Do not use walkie-talkies or other radio transmitting devices near the product or its cables. Use of such
devices near the product may affect measurements.
The product may not function correctly if the power is turned on once again within five seconds after turning
it off.
Do not poke the sensor or buzzer sound opening with sharp or pointed items. Doing so may result in
malfunctions or damage to the product, preventing accurate measurements.
Do not allow the product to come into contact with water. Do not install the product in locations where it may
be exposed to water. The product is not waterproof or splashproof. Exposure to water will result in
malfunctions.
The product is a precision device. Do not subject the product to strong impact or vibration such as by
dropping.
Avoid contact with internal components after opening the case.
Do not block the sensor vent.

2. Important Safety Information 2-3. Radio law certification
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2-3. Radio law certification
This product is certified as complying with radio laws in individual countries and regions as follows.
The following actions are prohibited by radio laws. The user and/or retailer may be subject to punishment if prohibited
actions are committed.
・Use in countries or regions in which radio law certification has not been obtained
・Sale in countries or regions in which radio law certification has not been obtained
・Disassembly or modification of the product
・Removal of certification labels from the product
If this product is used aboard marine vessels, the radio laws of the country bordering the territorial waters shall apply.
In such cases, use shall be prohibited in countries or regions in which radio law certification has not been obtained.
Check to confirm that industrial, scientific, and medical equipment (e.g., microwave ovens), on-premises radio
stations for mobile identification used in plant manufacturing lines (radio stations requiring a license), and specified
low-power radio stations are not operated in the frequency band (2.4 GHz) used by the product. If the product causes
radio interference to a radio station for mobile identification, take measures to eliminate radio interference—for
example, using the product in a different location or stopping radio emissions.
The countries where wireless communication can be used vary depending on the specifications.Please check the
nameplate attached to the product.
Wireless specifications
Wireless
communication
Protocol: Bluetooth Low Energy
Version: Ver. 4.2
Frequency: 2,402 - 2,480 MHz
Modulation: FSK
Output: Maximum 6 dBm