Qualitrol 509ITM Series, Manual

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Custom Scaling
The configuration parameters in this section of the Input Module Setup window allow you to
change the scaling of the process input signal. Custom Scaling is not available if the Input
Module Type field is set to a "Logic Switch" or "AC/DC Input". For
“Temperature” input
modules, for example,
“RTDs”, “Ambient”, and “CT, Temperature” using custom scaling
switches the values from Celsius to Fahrenheit. The fields in this section are described
below.
Use Custom
Scaling Indicates that custom scaling is defined for the input signal. If the check
box is checked, you must specify three additional parameters for the
input:
•
Custom Units Label field allows the user up to three characters for a
unit of measure, for example, ppm, RH, %.
•
Low-End Value field is the scaled minimum value for the
corresponding minimum input value.
•
High-End Value field is the scaled maximum value for the
corresponding maximum input value.
Custom Units
Label If the Use Custom Scaling field is checked, the 509ITM uses this label
instead of the default label defined by the Input Module Type field . This
label can consist of up to three alphanumeric characters.
Low-End and
High-End
Scaling
Values Provide the custom values corresponding to the indicated low-end and
high-end values for the selected module type. The 509ITM translates the
input signal into the alternate monitors using the low- and high-end
values provided.
Example: You have a Dissolved Gas Monitor with 0 - 1 mA representing
a 0 - 2000 PPM scale. Using a 0 - 1 mA input module, set:
•
Low-End Scaling Value
field to “mA = 0”
•
High-End Scaling Value field to
“1 ma = 2000”
•
Custom Units Label field to
“PPM”
An input of 0.4 mA would appear as 800 PPM on the display.
Low-End and High-End Scaling Values