Analog Output Menus (1-4) - Proportional Feed Mode - Walchem WebMaster ONE Instruction Manual

4 mA Value
Type in the text box the input value that you want to correspond to a 4 mA output by the option
card.
20 mA Value
Type in the text box the input value that you want to correspond to a 20 mA output by the option
card.
4-20 mA Loop Cal
If the device connected to the controller's 4-20 mA output is not reading correctly, click on the Set
4 mA button and the controller will output a fixed 4 mA signal. The receiving device can then be
calibrated to read correctly for a 4 mA signal. Then click the Set 20 mA button and the controller
will output a fixed 20 mA signal.
Click on the Submit button to save the changes.
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Analog Output Menus (1-4) - Proportional Feed Mode

(only appears if one or more 4-20 mA output option cards are installed)
In Proportional Feed mode the controller monitors an analog or sensor input and modulates an
analog output to maintain a set point value. The analog output value is displayed in percent.
If you make changes to the Input Assignment, you will need to click on the "Submit" button in
order to see all the correct units.
You may also change the 4-20 mA Output Control Mode here. If you do, you will have to reselect
the Input Assignment as well.
This section assumes that the 4-20 mA Output Control Mode is set to Proportional Feed. Other
control mode types are described in other sections of the manual.
Input Assignment
Click on the arrow of the pull down menu and select the analog or sensor input that will be used to
modulate the analog output.
Custom Name
This menu allows you to call the output another name if desired. Type the new name in the text
box.
Live Readings
These are for information only and display the sensor input reading, the sensor input status, the
analog output mA value, and the analog output status.
Set Point
Type in the text box the process value at which you want the output to activate. The set point value
is limited to the range of the assigned input.
Minimum Output Allowed
Type in the text box the lowest % output allowed for the analog output. Generally this will be 0%.
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