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11 CO
concentration
2
CO
concentration values measured in the room are indicated on the display and colour-coded (green =
2
great, yellow = ok, red = bad). You can adjust/calibrate the baseline from which concentration values are
measured for better accuracy.
The CO
concentration alarm alerts you if the CO
2
11.1 CO
concentration index
2
The LCD display will show the current level of CO
CO
concentration
2
Great (green)
index
Level 1
400 – 475 ppm
Level 2
475 – 550 ppm
Level 3
550 – 625 ppm
Level 4
625 – 700 ppm
11.2 Calibrating CO
concentration
2
You can adjust/calibrate the baseline from which concentration values are measured for better accuracy.
1. In the main screen, press and hold the Adjust button for about 3 seconds.
The CO
concentration value will flash.
Æ
2
2. Press the ▲ / °C/°F button or ▼ button to increase or decrease the value 10 ppm (-500 to 500 ppm).
Or long press the button to rapidly increase or decrease the value.
3. Press the Adjust button to save your setting and exit.
Note:
If no button is pressed for 30 seconds, the display will automatically save the setting shown on the
screen and exit to the main screen.
11.3 CO
concentration alarm
2
The CO
concentration alarm alerts you if the CO
2
set a custom concentration value or rely on the default value of 1500 ppm. If the alarm is triggered:
the beeper will sound
the corresponding red index level will light up on the display
the CO
concentration value and alarm icon will flash on the display
2
The CO
concentration alarm stops if the measured concentration value in the room falls below the alarm
2
concentration value or if you manually stop the alarm.
11.3.1 Setting custom CO
concentration alarms
2
Set a custom CO
alarm value to overwrite the default alarm value of 1500 ppm.
2
1. In the main screen, press and hold the Alarm button for about 3 seconds to enter CO
alarm setting mode.
The CO
alarm value and alarm icon will start to flash on the display.
Æ
2
2. Press the ▲ / °C/°F button or ▼ button to increase or decrease the value 10 ppm (1000 to 5000 ppm).
Or long press the button to rapidly increase or decrease the value.
3. Press the Alarm button to save your setting and exit.
Note:
If no button is pressed for 30 seconds, the display will automatically save the setting shown on the
screen and exit to the main screen.
11.3.2 Stopping the alarm
The CO
concentration alarm stops if the measured concentration value in the room falls below the alarm
2
concentration value or if you manually stop the alarm.
If the alarm sounds:
1. Air the room to lower the CO
concentration until the alarm stops. --OR-- press any key to stop the alarm.
2
12 Cleaning and care
Important:
– Do not use harsh cleaning agents, rubbing alcohol or other chemical solutions. They damage the
housing and can cause the product to malfunction.
– Do not rinse the product under the tap or expose to moisture.
– Do not immerse the product in water.
Clean the product with a soft, dry cloth.
Remove the battery before storing the product, or when the battery is depleted, to prevent leakage.
concentration in the room exceeds the set value.
2
concentration in the room with coloured levels.
2
OK (yellow)
Bad (red)
700 – 900 ppm
1500 – 2375 ppm
900 – 1100 ppm
2375 – 3250 ppm
1100 – 1300 ppm
3250 – 4125 ppm
1300 – 1500 ppm
4125 – 5000 ppm
concentration in the room exceeds the set value. You can
2
13 Disposal
13.1 Product
This symbol must appear on any electrical and electronic equipment placed on the EU market.
This symbol indicates that this device should not be disposed of as unsorted municipal waste
at the end of its service life.
Owners of WEEE (Waste from Electrical and Electronic Equipment) shall dispose of it separately
from unsorted municipal waste. Spent batteries and accumulators, which are not enclosed by
the WEEE, as well as lamps that can be removed from the WEEE in a non-destructive manner,
must be removed by end users from the WEEE in a non-destructive manner before it is handed
over to a collection point.
Distributors of electrical and electronic equipment are legally obliged to provide free take-back of waste.
Conrad provides the following return options free of charge (more details on our website):
in our Conrad offices
at the Conrad collection points
at the collection points of public waste management authorities or the collection points set up by
manufacturers or distributors within the meaning of the ElektroG
End users are responsible for deleting personal data from the WEEE to be disposed of.
It should be noted that different obligations about the return or recycling of WEEE may apply in countries
outside of Germany.
13.2 (Rechargeable) batteries
Remove batteries/rechargeable batteries, if any, and dispose of them separately from the product. According
to the Battery Directive, end users are legally obliged to return all spent batteries/rechargeable batteries; they
must not be disposed of in the normal household waste.
Batteries/rechargeable batteries containing hazardous substances are labelled with this symbol
to indicate that disposal in household waste is forbidden. The abbreviations for heavy metals in
batteries are: Cd = Cadmium, Hg = Mercury, Pb = Lead (name on (rechargeable) batteries, e.g.
below the trash icon on the left).
Used (rechargeable) batteries can be returned to collection points in your municipality, our stores or wherever
(rechargeable) batteries are sold. You thus fulfil your statutory obligations and contribute to environmental
protection.
Batteries/rechargeable batteries that are disposed of should be protected against short circuit and their
exposed terminals should be covered completely with insulating tape before disposal. Even empty batteries/
rechargeable batteries can contain residual energy that may cause them to swell, burst, catch fire or explode
in the event of a short circuit.
14 Technical data
14.1 Power supply
Batteries ............................................... 4.5 V, 3x 1.5 V AA batteries
Input voltage/current ............................. 5 V/DC, 500 mA (USB-C
concentration
2
Power consumption .............................. max. 2.5 W
14.2 Indoor temperature
Temperature measuring range* ............ -9.9 to +50 °C, with 0.1 °C resolution /
Temperature accuracy .......................... ±1 °C / ± 2°F
* Measuring intervals: every 47 seconds.
14.3 Indoor relative humidity
Relative humidity
measuring range* ................................. 1 – 99 %, with 1 % resolution
Relative humidity accuracy ................... ±5 %
* Measuring intervals: every 47 seconds.
14.4 Equivalent CO
CO
concentration
2
measuring range* ................................. 400 – 5000 ppm
CO
concentration accuracy ................. ±50 ppm + 5 %
2
* Measuring intervals: every 47 seconds.
14.5 Environment
Operating/Storage conditions ............... -10 to +50 °C, 1 – 99 % RH (non-condensing)
14.6 Other
Dimensions (W x H x D) ....................... 100 x 100 x 35 mm
Weight .................................................. 150 g
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
represents the technical status at the time of printing.
Copyright 2023 by Conrad Electronic SE.
)
®
+14.18°F to +122 °F, with 0.18 °F resolution
ppm measuring range
2
*2804759_v2_0823_02_DS_m_4L_(1)
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