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OPERATION MANUAL
Desktop CO2, Temperature &
Relative Humidity Monitor
TIM‐12
INTRODUCTION
Thank you for purchasing the TIM12 desktop
CO2 monitor. It measures carbon dioxide levels,
air temperature and humidity. This makes it
ideal for indoor air quality (IAQ) diagnosis and
HVAC system performance verification.
Poor indoor air quality is considered unhealthy.
It can lead to drowsiness, inability to
concentrate, and even illness.
IAQ monitoring of CO2 levels is widely used in
public areas such as offices, classrooms,
factories, hospitals and hotels. It is also
recommended for industrial hygiene in some
countries. (See appendix).
Product Features:
● Large display shows CO2 level, temperature,
humidity, date and time
● 15 degree tilt angle makes the display easy
to see and read
● Indoor air quality level indication:
Good, Normal, and Poor
● Stable NDIR sensor for CO2 detection
● Visible and audible CO2 warning alarm
● ABC (Automatic Baseline Calibration)
or manual CO2 calibration
● Maximum or minimum CO2 level recall
● Sampling rate from 1 sec. to 4:59:59.
MATERIALS SUPPLIED
This package contains:
● Meter
● Power Supply (5V +/‐ 10%, >= 0.5A)
● USB cable and software CO
● Manual
POWER SUPPLY
The meter is powered by an AC adaptor
(5V/0.5A output).
LCD DISPLAY
Symbols
ppm CO2 level in parts‐per‐million
GOOD CO2 is in good level
NORMAL CO2 is in normal level
POOR CO2 is in poor level
Air Temp. Air temperature
Humidity % Unit of air relative humidity
o
E (C/F) Celsius/Fahrenheit of temp.
MAX/MIN Maximum/Minimum readings
CO2 alarm icon
NOTE:
TWA / STEL / VENT.R / are vain icons on this
model.
KEYPAD
SET
‐Enter setup mode
‐Save and finish settings
ESC
‐Exit setup page / mode
‐Terminate calibration/data logging
RESET
‐ Clear MAX/MIN values
LOG
▲
‐ Select mode, increase value at setup
‐ Start data logging
MIN/MAX
▼
‐Activate MAX, MIN function
‐Select mode or decrease value
during setup
SET
+
▲
+
MIN/MAX
▼
‐ CO2 calibration mode
OPERATION
POWER ON/OFF
Plug the wall adaptor into an appropriate
receptacle. The meter will turn on automatically
after a short beep. The lit LED indicates full
power. If the voltage is too high or low, “bAt”
will display on the LCD and the LED will flash.
See page 14 for trouble shooting.
During normal operation, the LCD will display
the current CO2 level in ppm, air quality level,
air temperature, humidity, and the current date
and time (Fig.1).
TAKING MEASUREMENTS
The meter starts taking measurements
immediately after it is turned on and updates
the readings every second. In the event the
operating environment is quickly changed (for
example, from high to low temperature), it will
take approximately 2 minutes for the CO2 and
temperature to adjust and 10 minutes for
humidity to stabilize.
NOTE:
Do not hold the meter close to your face
as your breath will affect the CO2 level.
MIN/MAX
While the meter is powered on, press the
“
MIN/MAX
▼
“ button to see the minimum and
maximum CO2 level, temperature, and
humidity in turn. Each press of “
MIN/MAX
“ will
display the MIN and MAX values in order, then
return the meter to normal mode (Fig.2).
During normal operation or while viewing
MIN/MAX levels, press and hold the
“
RESET
“ key for more than 1 second to clear the
stored minimum and maximum values.
INTERNAL DATA LOGGING
Press “LOG
▲
” for 2 seconds under normal mode
to start logging. The green LED blinks to indicate
the logging status and the LCD shows the real
time CO2 value and “rEC”. Lower displays are
the real time temperature, humidity and clock.
To terminate data logging, press “ESC” for 2
seconds, The LED light will stop blinking and the
display will show “End” and CO2 reading
interchangeably. Hold down “ESC” for 2
seconds again, and it will return to normal
measurement mode.
The meter can save CO2, temperature and
humidity levels over time in internal memory.
The memory capacity is 15,999 points. The
sampling rate can be from 1 second to 4 hours
59 minutes and 59 seconds (See SETUP).
Minimum and Maximum recall is still available
during logging.
HIGH CO2 ALARM
