Comet U0110, User Manual

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IE-LGR-Uxxxx-16
21
U3121
Thermometer - hygrometer
for external probe
This model measures temperature, relative humidity
and dew point temperature using an outdoor COMET
Digi/E series probe. Its response to the temperature
or relative humidity change is significantly faster than by
models with internal sensor. This model is often utilized
to monitor areas in which only the probe is installed,
whereas the main unit is installed elsewhere. When
monitoring remote areas, the maximum probe line wire
must not exceed 15 m. The Digi/E series probes provide
calibrated measurement values. Hence, they may be
replaced without having to modify the device setup.
The battery in the device cannot be charged.
U3430
Compact thermometer -
hygrometer -
CO
2
concentration
meter
This model is designed to measure temperature, relative
humidity, dew-point temperature 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, compared 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 area, Accupack in the device can be
charged.
As the internal battery creates a parasitic heat during
the charging period, the measurement accuracy may be
affected b
y up to 1 º C.
In battery mode, this model has
significantly shorter battery life than models without CO
2
concentration measurement. For this reason,
the measurement of CO
2
concentration does not occur
as often as the measurement of other variables.
By default, this is 2 minutes with the option of extending