JDC Electronic SA Geos 11 - Manual (Page 13)

The various measuring modes in relation to temperature are displayed on
the middle block. In order to access a measuring mode, select (with the
help of the
button) the middle block (it flashes), then use the
button to change the display on the block and switch from one measuring
mode to another.
Selecting the unit of measurement
The instrument features 2 units of measurement in relation to temperature:
°C (degrees Celsius) and °F (degrees Fahrenheit)
To change the unit of measurement, select the middle block and display
the measuring mode in relation to temperature (it flashes), then keep the
button pushed down; when the desired unit is displayed, release the
button to confirm your choice.
Resetting the minimum and maximum values to zero
Select the middle block and display the measuring mode that you wish to
reset (it flashes), then press the
button for 2 seconds.
Humidity
Measuring modes
Relative humidity Minimum humidity Maximum humidity Dew point
The dew point of air is the temperature at which, while keeping the current
barometric conditions as they are, the air becomes saturated with water
vapour. It is the phenomenon of condensation which occurs when the dew
point is reached that creates the clouds, mist and dew.
The various measuring modes in relation to humidity (including the dew
point) are displayed on the middle block. In order to access a measuring
mode, select (with the help of the
button) the middle block (it flashes),
then use the button to change the display on the block and switch
from one measuring mode to another.
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