V t button
Press this button to decrease the value, depending on the
menu. Press the "ESC" button to exit from this mode.
W MAX/MIN button
Press the button once. The abbreviation "MAX" indicates
the maximum measured CO
temperature or humidity value. Press the button again
to display the minimum values (Min). Press the "ESC"
button to exit from this mode.
X ESC button
Press this button to exit from the current mode and/or to
confirm the values set (e. g. time etc.).
Background lighting
The background lighting is switched on by pressing the
"ALARM", "MAX/MIN", "s" or "t" button. The back-
ground lighting switches itself off after approx. 20 sec-
onds if the appliance is not used any further. Press the
"ESC" button to exit from this mode.
Power supply
The measuring device is equipped with a special 3.7 V
lithium ion battery for up to 12 hours of mains free oper-
ation. The battery is designed to provide the logger with
B - 4
value or the maximum
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Operating Manual – CO
power over shorter periods, e. g. when mains power is not
available, during power outages etc. It is not designed to
power the logger over longer periods, e. g. several weeks
or even days. The reason the logger requires such a rel-
atively high amount of energy is the CO
permanently active in order to provide you with changes
in CO
concentrations in real-time. Please use the mains
2
adapter provided in the scope of delivery to ensure per-
manent and trouble-free operation.
4.0 Technical Data
Sensor . . . . . . NDIR (nondispersiv infrared) CO
Measuring range . . . . . . . . . . . . . . . 0 - 9.999 ppm CO
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ppm
CO
accuracy . . ±75 ppm or ±5 % of the measured value
2
Temperature range . . . . . . . 23 - 122 °F (-5 °C - 50 °C)
Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . .0,1 °C/°F
Temperature accuracy . . . . . . . . . . . . . . . . . . .±0,5 °C
Relative humidity . . . . . . . . . . . . . . .0,1 to 99,9 % R.H.
Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . 0,1 % R. H.
Accuracy of the rel. humidity . . . . . . . . . . . . . . . . .±5 %
air quality data logger
2
sensor which is
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-Sensor
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EN