Walchem WebAlert WA500, Instruction Manual

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4-20 mA Input Assignment
Click on the radio button which best describes the devices you have attached to the 4-20 mA inputs, for
each input labeled 1 through 6. Make sure that you select the type of device that is actually wired to that
terminal of the card!
Not Used should be selected if nothing is connected to that input.
Level should be selected if a continuous level transmitter is attached to that output. Later when you get
to the 4-20 mA Input Page, you will be able to name the input, define the Units of Measure, and also set
alarm limits. Usage will be calculated and displayed on the System Summary page.
Flow Meter should be selected if flow transmitter is connected to that input. Later when you get to the
4-20 mA Input Page, you will be able to name the input, scale it, define the Units of Measure), and also
set alarm limits. It will display rate and total. Any other transmitter where it is desired to track rate and
total can also be configured as a Flow Meter type.
Generic Input should be selected if the 4-20 mA transmitter connected to that input is anything other
than the previously mentioned ones. Later when you get to the 4-20 mA Input Page, you will be able to
name the input (for example, Temperature or Pressure), scale it, define the Units of Measure (like
degrees C or Bars), and also set alarm limits.
5.3 System Summary Menu
There are no programmable parameters in the System Summary Menu page. Several tables will
be displayed, with information on 4-20 mA inputs values, alarm relay state, digital input state,
active alarm messages, etc.
5.4 4-20 mA Inputs
This page is used to configure the 4-20 mA inputs. If you have set the type of input in the Startup page,
this page will already be showing the correct fields to set up each input type. If you have not already set
the input types, you can do that here, then click the Submit button. When the page refreshes the correct
fields will appear.
Select the options that you want for each of the sections on the page. When you click on the “Submit”
button at the bottom of the page, your changes will take effect. If you move to another page without
clicking “Submit” first, your changes will be lost!
4-20 mA Input Assignment
Click on the radio button which best describes the devices you have attached to the 4-20 mA inputs, for
each input labeled 1 through 6. Make sure that you select the type of device that is actually wired to that
terminal of the card!
See section 5.2 for a description of each input type.
Level (4-20 mA) Input Menu
(only appears if a 4-20 mA input is assigned to be a Level type)
Input
Displays which 4-20 mA inputs are defined as level inputs.