Revision 1 114 9/10/2019
5.17.2 Analog Input Parameters and Controls
The Analog inputs and controls include:
• Description - used to enter the Analog Input descriptor. This information will appear under
the Analog Inputs section on the Status Tab and on the analyzer LCD display
• Minimum - the lower limit of the range (typically zero).
• Range - the maximum or span limit of the range.
• Value - the calculated range value for a given 4 – 20 mA input.
• Engineering Units - the units that correspond to the type of analog input (e.g. ppm, %, psig,
etc).
• Calibrate A. I. # - when this button is pressed the Scaled Zero and Scaled Span fields will
be activated and the appropriate values can be entered.
• Capture Zero - used to capture the A/D bits that are associated with a 4mA input during the
calibration of the analog input.
• Scaled Zero - used to enter the zero value or the range. For a 4 – 20 ma range, the 4 mA
value would be entered.
• Raw Zero - shows the A/D bit count for the 4mA input.
• Capture Span - used to capture the A/D bits that are associated with a 20mA input during
the calibration of the analog input.
• Scaled Span - used to enter the span value or the range. For a 4 – 20 ma range, the 20 mA
value would be entered.
• Raw Span - shows the A/D bit count for the 20 mA input
5.17.3 Analog Inputs Alarm
The Analog Inputs Alarm fields are used to select the input alarms to be used, the limit for the
input and the solenoid or relay to be used for that alarm. The appropriate check box should
be selected for each input.
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