JUMO 705010 mTRON T - Multichannel Controller Module Operating Manual - Manual (Page 126)

8 Configuration – in setup program only
126
8.2 Math/Logic
The optional Math/Logic function can be used for four formulae, which can be used freely either
for mathematical calculations (analog values) or for logical links (binary values).
Fixed formulae for calculating the differential, ratio, and relative humidity are also provided. In
this case, two analog values (variable A and B), e.g. the measured value of analog input 1 and
2 are linked to each other. The dry-bulb temperature and the wet-bulb temperature are required
for calculating the relative humidity and should be determined with a psychrometric humidity
sensor.
The results are available in the analog selector or digital selector. If the function is not active,
the math value = 3.0E+37 and the logic value = 0 (FALSE).
Setup dialog
Parameters
Parameter Selection/settings Description
Math function Without function Function is switched off.
Mathematics Mathematical links with freely selectable
variables and operators
Logic Logical links with freely selectable vari-
ables and operators
Difference Difference between the measured value
and analog signal A and B (A - B)
Ratio Ratio between the measured value and
analog signal A and B (A / B)
Humidity Calculation of relative humidity
Analog signal A: dry-bulb temperature
Analog signal B: wet-bulb temperature
Unit 6 characters (%) Unit in which the math result (analog
value) is displayed.
Variable A Analog selector Analog signal A (for calculating differen-
tial, ratio, and humidity)
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