Scaling and the scaling equation

Input scaling allows the translation of electrical signal units into engineering units. The device returns the High Engineering value when the High Signal value is present at the input. It returns the Low Engineering value when the low signal is present. It returns all other values in a linear fashion, depending on the signal present at the input.

For voltage input types, scaling is defaulted to a 1:1 relationship between the signal values and the engineering units, allowing the device to return the actual value of the signal present on the input.

For current input types, scaling is defaulted to return 0 to 100% for a corresponding 4 mA to 20 mA signal on the input.

For RTD and thermocouple input types, scaling values display units based on sensor type (ohms or millivolts) or temperature units (°F, °C, °K, or °R) when a non-zero sensor type is selected.

High Signal values must be greater than Low Signal values.

This is the scaling equation: