20
immediately.
The device alone is suitable for measuring
in places where there is no rapid change in temperature
or relative humidity, and there is no condensation
of water vapours. If water vapour condensation occurs
inside the datalogger, then the resulting water
will remain there and may damage its electronics.
The device is placed directly in the measured space,
while the installation needs to ensure sufficient level
of GSM signal at the installation location. As the internal
battery creates a parasitic heat during the charging
period, the measurement accuracy may be affected by
up to 1 º C. The calibration of this instrument
in the laboratory is recommended with the open bottom
part of the battery box, to allow airflow from the back
of the electronics. When airflow in the range 0.5
–
1 m/s,
read the value after approx. 4 hours.
The closed device
reaches a difference of approximately 2 %RH when
inserted in the humidity chamber, then dramatically
slows down. Precise reading takes many times longer
time than with the open rear lid.
The maximum length of each probe lead should not
exceed 15 m. It is recommended to use shielded cables.
To maintain the IP rating, the unused probe connector
should be provided with a supplied closing cap.
AR003954
Compact thermometer -
hygrometer -
pressure gauge -
CO
2
concentration meter
This model is designed to measure temperature, relative
humidity, dew-point temperature, barometric pressure
and
the concentration of CO
2
in the air by internal
sensors. Barometric pressure can be measured as
absolute or recalculated to sea level. No
additional
probes or sensors can be connected. It is characterized
by a simple and compact design and a relatively long
response in the measured quantities, compare to model
with external probes. The sensors are located under
the grid on the front and side of the unit The device is
suitable for measuring in places where there is no rapid
change in temperature or relative humidity, and there is
no condensation of water vapours. The device is placed
directly in the measured space, while the installation
needs to ensure sufficient level of GSM signal
Summary of Contents for AR003954
Page 5: ...5 Datalogger AR004525 model...
Page 59: ...59 Dimensions AR006087 AR005348 AR005892...
Page 60: ...60 AR004525 AR006088 AR003954...
Page 61: ...61 AR006089 AR006090...
Page 62: ...62 AR006092 AR006779 AR006091...