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H62.0.21.6C-02_VWR
Pushbuttons
3.2
3.3 Switching on
The device is switched-on by shortly pushing the button
After segment test
P_OF
if auto-off function is activated. If this function is deactivated the device is in continuous operating
mode.
After that the device is ready for measuring.
Running measurements
3.4
a) Please pay attention that no dirt gets into the vents. If this has already taken place, please do not try
to remove it. Improper treatment can damage the sensors. Additionally the device should be proteced
from mechanical agitation, because this can also damage the sensors (carrier material glass and
ceramic)!
Attention: In the sensor area the instrument is ESD-sensitive. Never touch or hold sensor
head!
b) For accurate measurements it is required that the device has the same temperature as the measured
room.
If necessary you should wait therefore till the device can adept the ambient temperature.
If this is not possible, the measurement should be done as described below:
Hold device by the outstretched arm and sway back and forth to accelerate the air exchange and the
temperature matching. As soon as the measured value is quite stable, it can be read off. This applies
to humidity as well as temperature measurements. It may make sense to press the hold key to
"freeze" all values and therefore read them off easily.
c) If the device is held in the hand during the measurement, both temperature and humidity are altered
by the body heat. To minimize this influences the device should be held as far away from the sensor
as possible and a direct contact with the exhaled air should be avoided. Most accurate measurements
are achieved, if the device is set down and the measured value (as soon as it is stable) is read at
adequate distance. Additionally you ought to consider that outdoor humidity measurements cannot
have an accuracy of 0.1% due to outside influences like e.g. airflow or thermal fluctuation.
3.5 Choice of measuring unit
Press key
shortly to switch between the following measuring units:
- absolute air pressure
- temperature
- relative air humidity
- dew point temperature Td
- wet bulb temperature Twb
- specific humidity
- absolute humidity
on/off unit:
Key
press shortly: switch between measuring units
press longer: switch off instrument
mode:
Key
press shortly: display of the MIN/MAX values
Press longer: invoke the configuration menu
hold:
press shortly: 'Freeze' the current measuring value
Key
the device shortly displays information on its configuration:
[hPa]
[°C] or [°F]
[%]
[°C] or [°F]
[°C] or [°F]
[g/kg]
3
[g/m
]
(see chapter 7)
('HLD' displayed)
.
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