Furthermore, the correct indication of CO
2
depends on the air diffusion in the room;
it can take a few minutes until the indicator has stabilized. The same applies to the
indication of the room temperature and the humidity in the room.
At a CO
2
-concentration of more than 3000 ppm, “Hi” will be shown on the display.
b)
Air quality display in traffic light colours
Air quality is shown using a traffic light display with 3 coloured LED’s. The following displays
are possible:
Green LED: The CO
2
-concentration is below 800 ppm. Air quality is good.
Yellow LED: The CO
2
-concentration is between 800 and 1500 ppm. Air quality is ok. It is
recommended ventilating the room soon.
Red LED:
The CO
2
-concentration is above 1500 ppm. Air quality is bad. It is necessary
to ventilate the room.
If the warning signal is not muted, another additional audio sound is emitted.
c) Muting the audio sound.
At a CO
2
-concentration of more than 1500 ppm, an audio sound is emitted. This sound can be
muted by pressing the “MUTE”-key
(4)
.
Troubleshooting
The display indicates “ERR3”
:
• The ambient temperature is lower than 0 °C or higher than +50 °C.
Confusing symbols on the display:
• Disconnect the ambient air indicator from the operating voltage.
No display:
• Check the power supply.
• Either use the enclosed power supply or alternatively, a so-called high-power USB port that
delivers a minimum current of 500 mA.
Care and Cleaning
• Disconnect the product from the mains before each cleaning.
• The device requires no servicing on your part, apart from occasional cleaning.
• Do not use any aggressive cleaning agents, rubbing alcohol or other chemical solutions as
they can cause damage to the housing and malfunctioning.
•
Clean the product with a dry, fibre-free cloth.
• Do not apply too much pressure on the display to avoid scratch marks.
Disposal
Electronic devices are recyclable waste and must not be disposed of in the
household waste. At the end of its service life, dispose of the product in accordance
with applicable regulatory guidelines.
You thus fulfill your statutory obligations and contribute to the protection of the environment.
Technical Data
a) Ambient air indicator
General
Input voltage ............................................. 5 V/DC
Power consumption .................................. max. approx. 180 mA
Display ...................................................... LCD (backlit)
Measured values ...................................... Carbon dioxide, temperature and relative humidity
Operating ambient temperature ................ 0 °C to +50 °C
Ambient temperature during storage ........ -20 °C to +60 °C
Ambient humidity ...................................... 0% to 95% relative humidity, not condensing
Dimensions (W x H x D) ........................... 137 x 99 x 28 mm, without feet
Weight ...................................................... approx. 186 g
Carbon dioxide sensor
Measurement range .................................0 - 3000 ppm
Definition
................................................... 1 ppm (0 - 1000 ppm)
5 ppm (1001 - 2000 ppm)
10 ppm (2001 - 3000 ppm)
Accuracy (temp. < +25 °C) ....................... ±80 ppm or ±5% of the reading
(>2000 ppm: ±7% of the reading)
Repeatability ............................................. ±20 ppm (at 400 ppm)
Influence of temperature
........................... Typically ±0,2% of the reading per °C
or ±2 ppm of the reading per °C, referring to +25 °C
Warming-up phase ...................................2 min for +22 °C
Temperature sensor
Measurement range .................................0 °C to +50 °C
Definition
...................................................0.1 °C
Accuracy ...................................................±1 °C
Humidity sensor
Measurement range .................................20% to 90% relative humidity
Definition
...................................................1%
Accuracy ...................................................±5% relative humidity at +23 °C
b) Power adaptor
Input voltage .............................................
100 - 240 V/AC, 50/60 Hz
Output .......................................................5 V/DC, 1000 mA
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com). All rights
including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited. This publication
represent the technical status at the time of printing.
Copyright 2020 by Conrad Electronic SE. *101300_V1_0620_02_mxs_m_en
