TESTO 635 - Calculation

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6.2.4 Calculation
If calculation is switched on, additional parameters with calculated values can
be displayed from the readings of
one
probe. These are then displayed as
additional measurement channels in measurement view.
Particular measurement channels must be available in order to perform the
calculation.
The following variables can be calculated:
· Water content
· Dew point (below 0°Ctd/32°Ftd frost point temperatures are displayed)
· Psychrometric temperature
The heat transfer coefficient (alpha) required for calculating the U value can be
set.
It is also possible to calculate the difference between two measurement
channels (Delta). This is only possible if the selected measurement channels
have the same unit.
²
Activating/deactivating rreading ccalculation:
 The main menu is open, Menu is displayed.
1 Calc. ¬ .
2 Press / to select the variable that is to be activated/deactivated
and confirm with .
3 Press / to select On (= activated) or Off (= deactivated) and
confirm with .
²
Entering tthe hheat ttransfer ccoefficient ((alpha):
 The main menu is open, Menu is displayed.
1 Calc. ¬¬alpha ¬ .
2 Press / to set the value and confirm with .
OK
OKOK
OK
OK
OK
6. Setting the instrument