JUMO 701550 di 308 - Digital Indicator Operating Manual - Manual (Page 64)

8 Extra codes
64
8.2 Difference, humidity or ratio calculation
The controller can be configured through the Setup
program such that a difference, humidity or ratio
calculation is carried out by means of a default
formula. Analog input 2 must be available. The
functions need not be enabled.
vSetup program (Math/Logic)
Difference
The difference of the measurements is formed from
analog input 1 (E1) and analog input 2 (E2).
Difference: E1-E2
Humidity
The relative humidity is determined by means of a
psychrometric humidity sensor, through the
mathematical combination of the wet bulb and dry
bulb temperature.
Relative humidity: (E1, E2)
E1 - dry bulb temperature via analog input 1
E2 - wet bulb temperature via analog input 2
Ratio
The math module forms the ratio of the
measurements from analog input (E1) and analog
input 2 (E2).
Ratio: E1/E2
Result
The result is under „Math 1“ or „Math 2“ and can be
used as analog value for various parameters.
vAnalog selector, Page 34