Burkert Type 1150 - Manual (Page 77)

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C
ONFIGURATION
Ratio control
Control is always based on variable a.
The math module forms the ratio of the measurements of a and b (a/b) and produces the setpoint for the
controller. The ratio is made available as a value, via the function “Math X”, and can be displayed.
The required ratio a/b is programmed as the setpoint (ratio setpoint) in the setpoint definition.
Humidity control
The humidity controller receives the process value from a psychrometric humidity probe, through the
mathematical combination of wet bulb and dry bulb temperatures.
Variable a - dry temperature
Variable b - wet temperature
The math and logic module can be enabled through the code or the setup program.
Extras Enable device options
Enabling the math and logic module