Watlow D4T Data Logger
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Chapter 5 Function Reference
For example, a flow meter is connected to the universal input. The flow meter provides a cur-
rent signal proportional to flow where 4 mA indicates 0
gallons per minute (gpm) and 20 mA indicates 10 gpm.
With the scaling parameters set as listed below, when the
universal input receives an 8 mA signal, the output of the
block is 2.5 (gpm).
Sensor Type: Milliamps
Units: Process
Scale Low: 4 mA
Scale High: 20 mA
Range Low: 0 (gpm)
Range High: 10 (gpm)
Millivolts/Volts
These FBs are found on the canvas of the FB diagram. The number of these FBs that are avail-
able depends on the number of flex modules with Universal Inputs installed and configured for
voltage (millivolts or voltage).
The module number shown on the FB is the number of the data logger’s slot that houses the
flex module with the Universal Input. The Universal Input number indicates the specific input
on the flex module.
Signals
Direction
Label
Type
Function
Transmitter
- - - -
Analog
The scaled electrical signal or process value with filter
and offset applied
Name
Uniquely identify this FB using up to 20 alphanumeric characters.
Sensor Type
To detect and condition a voltage for use with other FBs, set Sensor Type to
Millivolts or
Volts
.
Units
Set the units for the function’s output.
Options:
• 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).
• Absolute Temperature:
the output is a temperature on the Celsius or Fahrenheit scale.
