Watlow F4T • 144 • Chapter 5 Function Reference
Signals
Direction
Label Type Function
Receiver
- - - - Analog Signal to be scaled
Transmitter - - - - Analog Scaled signal with offset applied
Function
To scale the input values to up to ten specific values, set Function to Stepped.
Units
Set the units of the output value.
Options:
• Source: the output has the same units as the signal connected to the top receiver.
• None: the output is a pure number without units.
• Absolute Temperature: the output is a temperature on the Celsius or Fahrenheit scale.
For example, 33° F as an absolute temperature is one degree above the freezing point
of water. An absolute temperature can be used as a set point or compared with other
temperatures to determine which is hotter or colder.
• Relative Temperature: the output is a relative number of degrees, not an absolute
temperature. For example, the difference between the two measured temperatures,
120° C and 100° C is 20 degrees, but it is not the temperature 20° C. A relative tem-
perature is appropriate for use as a calibration offset or a deviation alarm set point.
• Power: the output is a percentage with 100% representing full power and 0% represent-
ing no power.
• Process: the output is in units of measure other than degrees Fahrenheit, degrees Cel-
sius or relative humidity.
• Relative Humidity: the output is a measurement of percent relative humidity (%RH).
Input Point 1
Set the minimum input value to be scaled. Input values less than Input Point 2 are scaled to
Output Point 1.
Range: -99,999.000 to 99,999.000
Output Point 1
Set the value to which the input is scaled when the input is less than Input Point 2.
Range: -99,999.000 to 99,999.000
Input Point 2
Set the second lowest input value to be scaled. Input values equal to or greater than this, but
less than Input Point 3 are scaled to Output Point 2.
Range: -99,999.000 to 99,999.000
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