Indoor
Air Quality
Meter
Instruction
Manual
R9920
www.REEDInstruments.com
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Table of Contents
Introduction ................................................................................................... 3
Product Quality ............................................................................................. 3
Safety ............................................................................................................ 3
Features .....................................................................................................3-4
Included ........................................................................................................ 4
Specications ............................................................................................. 4-5
Instrument Description .................................................................................. 6
Display Description ....................................................................................... 6
Operating Instructions ............................................................................. 7-15
Setting up the R9920 .............................................................................. 7
Power ON/OFF ........................................................................................ 7
Main Operating Modes (Live and Data logging) ...................................7-8
Live Mode ........................................................................................... 7
Data Logging Mode ............................................................................ 7
Screen Saver Mode ............................................................................ 8
Setup Mode ........................................................................................ 8
General Setup ......................................................................................... 9
Recording Setup ................................................................................. 9-10
View Alarms ............................................................................................ 11
History .............................................................................................. 11-12
Display .................................................................................................... 13
Date & Time ........................................................................................... 14
Info ........................................................................................................ 15
Capturing a Screenshot ........................................................................ 15
Data Upload .......................................................................................... 15
Charging the Battery .................................................................................. 16
Applications ................................................................................................ 16
Product Care ............................................................................................... 16
Product Warranty ........................................................................................ 17
Product Disposal and Recycling ................................................................. 17
Product Support ......................................................................................... 17
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Introduction
Thank you for purchasing your REED R9920 Indoor Air Quality Meter.
Please read the following instructions carefully before using your
instrument. By following the steps outlined in this manual your meter will
provide years of reliable service.
Product Quality
This product has been manufactured in an ISO9001 facility and has been
calibrated during the manufacturing process to meet stated product
specications. If a certicate of calibration is required please contact the
nearest authorized REED distributor or authorized Service Center. Please
note an additional fee for this service will apply.
Safety
• Never attempt to repair or modify your instrument. Dismantling
your product may cause damage that will not be covered under the
manufacturer’s warranty. Servicing should only be provided by an
authorized service center.
• Avoid condensation on CO
• Do not hold the meter in close proximity to your mouth as exhalation
affects CO
• Do not drop, subject to shock or use excessive force as it may result in
damage to the meter.
• Do not use the meter in extreme conditions or near a heat source for
any extended period of time to avoid damage.
levels.
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sensor.
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Features
• Simultaneously monitors carbon dioxide (CO2), temperature and
relative humidity
• Low-drift NDIR CO2 sensor for stable and accurate readings
• User selectable unit of measure (°C or °F)
• 7" (178 mm) high-resolution color TFT LCD (1024 x 600 pixels)
• User adjustable high and low alarms
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• Max/Min Display
• Internal 16 GB memory stores data points in CSV format
• User selectable sampling rate from 1 sec to 24 hrs
• Internal time and date stamp
• Rechargeable li-ion battery
• Built-in desk stand and wall mounting bracket
• Low battery indicator
Included
• Indoor Air Quality Meter, Desktop/Wall Mount
• USB Cable
• Power Adapter
• Wall Mounting Bracket
Specifications
Temperature
Measuring Range: 32 to 122°F (0 to 50°C )
Accuracy: ±1.8°F (1°C)
Resolution: 0.1°F/°C
Humidity
Measuring Range: 0 to 100% RH
Accuracy: ±3.5% (20-80% RH)
Resolution: 0.1% RH
(Carbon Dioxide)
CO
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Sensor Type: Nondispersive Infrared (NDIR)
Measuring Range: 0 to 9999ppm
Accuracy: ±5% rdg +75ppm
Resolution: 1ppm
Response Time: <2 seconds
±5% (<20% & >80% RH)
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General Specifications
Display: 7" High-resolution color TFT
Display Resolution: 1024 x 600 pixels
Adjustable Brightness: Yes
Min: Yes
Max: Yes
Datalogging Capabilities: Yes
Real-Time Clock and
Date Stamp: Yes
Selectable Sampling Rate: Yes (between 1second and 24 hours)
Internal Memory: Yes (16 GB)
Alarms: Yes (Low and High)
Kick Stand: Yes
Wall Mountable: Yes (bracket included)
Low Battery Indicator: Yes
Power Supply: 3000mAh rechargeable Li-ion battery/
Power Adapter
Battery Life: ~2 hours
Charge Time: ~9 hours
PC Connectivity: USB Cable (Type-C)
USB Cable Length: 10' (3m)
Product Certications: CE
Operating Temperature: 14 to 104°F (10 to 40°C)
Storage Temperature: 14 to 104°F (10 to 40°C)
Operating Humidity Range: 0 to 100%
Maximum Operating Altitude: 6561' (2000m)
Dimensions: 7.8 x 4.6 x 1" (198 x 118 x 25.7mm)
Weight: 12.9oz (365g)
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Instrument Description
1. LCD Display
2. Power Button
3. CO2 Sensor
4. USB Terminal
5. Temperature/
Humidity Probe
6. Kickstand
Display Description
1. Menu Function
2. Memory Status Indicator
3. Date and Time Stamp
4. Battery Status Indicator
5. Numerical Scale
6. Graphical Scale
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7. Time and Date Scales
8. Recording Button
9. Maximum/Minimum
Measurement Values
10. Real-Time Measurement
Values
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Operating Instructions
Setting up the R9920
While the meter is off, slide the temperature and humidity sensor directly
onto the cradle jack.
Note: The R9920 can be mounted on a wall using the supplied wall
mount bracket and screws. Mount the bracket on the wall rst and
then snap the meter onto the bracket. The wall mount bracket has a
swivel arm for convenient angling. Make sure to mount the bracket
with the hinge to the right in order for the display to be upright.
Power ON/OFF
To turn the meter ON, press and hold the POWER button for approx. 3
seconds. To turn the meter OFF, press and hold the POWER button for
approx. 2 seconds and tap on power OFF when it appears on the LCD
display.
Main Operating Modes (Live and Data Logging)
Live Mode
In Live mode (default setting), the R9920 displays air temperature, relative
humidity, and CO2 graphically and digitally on the main interface screen
while also displaying the Min-Max values for each digitally.
Data Logging Mode
While in Data Logging mode, the R9920 displays air temperature, relative
humidity, and CO
measurement data to internal les at a programmable sampling rate. You
can open and view these internal les right on the meter screen or transfer
them as CSV formatted les directly to a PC. (See Data Upload and Setup
Mode sections of the manual for additional details.)
Note: To obtain stable and accurate measurements, it is always
recommended to allow the meter to get acclimated to its environment.
(Approx. 3-5 minutes)
same way that it does in Live mode while logging
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Screen Saver Mode
When the R9920 is idle for 60 seconds, the screen saver activates as
shown below. Simply tap on the screen to return to the main
interface screen.
Setup Mode
1. Tap the MENU button on the Main Interface Screen to enter
Setup Mode.
2. Tap the screen to select between the following parameters:
General Setup
Recording Setup Set the data logging sampling rate
View Alarms View historical alarms
History View historical data les
Display Adjust the display settings
Date & Time Set the time and date
Info View meter information and upgrade rmware
Set the alarm values and temperature unit
of measure
3. Once the appropriate parameter has been selected, follow the
instructions below.
continued...
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General Setup
1. Set the required Temperature unit of measure by tapping on the circle
next to °F or °C.
2. Set the Alarm ON or OFF by tapping on the toggle switch.
3. To set the HIGH and LOW Alarm thresholds for temperature, humidity
and CO2, open the numerical keypad by tapping the small arrow to
the right of each alarm programming eld. (Alarm must be enabled)
4. Tap SAVE to conrm your settings or tap on the X to cancel and
resume normal operation.
Note: At any time, you can tap on the X to exit the Setup mode and
resume normal operation.
Recording Setup
The sampling rate can be set from "1" second to 23 hours, 59 minutes
and 59 seconds.
1. To set the sampling rate, open the interactive numerical keypad by
tapping the required hours, minutes, and seconds sampling
rate elds.
2. To enable or disable a scheduled recording tap on the toggle switch.
3. To set a recording start time, open the interactive calendar by
tapping the small arrow to the right of the programming eld.
(Scheduled recording must be enabled)
Note: The default start time is the current system date and time.
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4. To select the maximum number of data points, open the interactive
options box by clicking the small arrow to the right of the
programming eld.
5. Select between 500, 1k, 5k, 10k, 20k or MAX.
Note: If MAX is selected, the meter will create multiple 20,000
data point les and recording will continue until you manually stop
the recording (by tapping STOP RECORDING on the Main Interface
Screen) or until it reaches full internal memory (16GB).
6. Tap SAVE to conrm your settings or tap on the X to cancel and
resume normal operation.
Note: At any time, you can tap on the X to exit the Setup mode and
resume normal operation.
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View Alarms
1. Swipe up or down to scroll through the history of Alarm events
(if any).
2. To sort the Alarm events by date, open the interactive calendar by
tapping the programming elds next to "Sort by date".
3. To sort the Alarm events by high/low measurement values, open an
interactive keypad by tapping on the programming elds next to
"Sort by value" for temperature, humidity and CO2.
Note: At any time, you can tap on the X to exit the Setup mode and
resume normal operation.
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History
1. Scroll up or down to scroll through the list of historical data les.
2. Select a data le by rst tapping it (to highlight it) and then tap OPEN
or CANCEL.
3. To delete a le, tap the check box located on the right end of the
specic data le, and then tap DELETE.
4. To delete all les, tap the check box located next to "All", and then
tap DELETE.
Note: At any time, you can tap on the X to exit the Setup mode and
resume normal operation.
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Display
1. To adjust the brightness of the display, drag the Brightness slider to
the right or left.
2. Set the screen saver mode ON or OFF by tapping on the
toggle switch.
3. To enter the screen saver timeout time, open the interactive
time options box by tapping the small arrow to the right of the
programming eld.
4. Select between 10, 20, 30 or 60 seconds.
5. Tap SAVE to con rm your settings or tap on the X to cancel and
resume normal operation.
6. When active, the screen-saver mode appears as shown below,
providing real-time relative humidity, air temperature, and CO2 levels.
Note: At any time, you can tap on the X to exit the Setup mode and
resume normal operation.
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Date & Time
1. To set the Date and Time, open the interactive calendar by tapping
the small arrow to the right of the programming eld.
2. Scroll up or down to set the applicable Year, Month, Day, Hour,
Minute and AM or PM (12 hour format must be enabled).
3. Tap OK to conrm your selections or tap on CANCEL.
4. To set the Date format, open the interactive options box by tapping
the small arrow to the right of the programming eld.
5. Select between DD/MM/YYYY or YYYY/MM/DD.
6. Set the required time format by tapping on the circle next to
"12-Hour" or "24-Hour" format.
Note: At any time, you can tap on the X to exit the Setup mode and
resume normal operation.
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Info
Provides information on the model number, current rmware version,
manufacturer name and allows you to update the rmware version
(if required).
Note: At any time, you can tap on the X to exit the Setup mode and
resume normal operation.
Capturing a Screenshot
The R9920 allows you to take a screenshot of the current display
by swiping downward on the entire screen with three (3) ngers. All
screenshots are stored in the Pictures folder located in the R9920 internal
storage directory for easy access.
Data Upload
Connect the R9920 via the included cable to a USB port on your PC,
to download the recorded data les. The R9920 saves recorded data
to a CSV (Excel) in the RH-T Data folder. Once connected, the PC will
recognize the R9920 as a USB storage device. View the R9920 internal
memory as you would any external
storage device.
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Charging the Battery
Connect the R9920 via the included cable to a USB port on your PC or
into a wall outlet using the included USB Power Adapter to charge the
Li-ion battery.
Note: Charge the meter until the battery indicator appears full and remove
the charging cable when done.
Applications
Environmental Monitoring in:
• Schools
• Ofce buildings
• Greenhouses
• Factories
• Hotels
• Hospitals
• Laboratories
• Areas or manufacturing processes where high levels of carbon dioxide
must be measured
Product Care
To keep your instrument in good working order we recommend the following:
• Store your product in a clean, dry place.
• Charge the battery as needed.
• Clean your product and accessories with biodegradable cleaner. Do not
spray the cleaner directly on the instrument. Use on external parts only.
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Product Warranty
REED Instruments guarantees this instrument to be free of defects in
material or workmanship for a period of one (1) year from date of shipment.
During the warranty period, REED Instruments will repair or replace, at no
charge, products or parts of a product that proves to be defective because
of improper material or workmanship, under normal use and maintenance.
REED Instruments total liability is limited to repair or replacement of the
product. REED Instruments shall not be liable for damages to goods,
property, or persons due to improper use or through attempts to utilize the
instrument under conditions which exceed the designed capabilities. In
order to begin the warranty service process, please contact us by phone
at 1-877-849-2127 or by email at info@reedinstruments.com to discuss
the claim and determine the appropriate steps to process the warranty.
Product Disposal and Recycling
Please follow local laws and regulations when disposing or recycling your
instrument. Your product contains electronic components and must be
disposed of separately from standard waste products.
Product Support
If you have any questions on your product, please contact your authorized
REED distributor or REED Instruments Customer Service by phone at
1-877-849-2127 or by email at info@reedinstruments.com.
Please visit www.REEDInstruments.com for the most
up-to-date manuals, datasheets, product guides and software.
Product specifications subject to change without notice.
All rights reserved. Any unauthorized copying or reproduction of
this manual is strictly prohibited without prior written permission
from REED Instruments.
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