Instruction Manual
D102748X012
Service Tools
October 2014
68
D A: PV HiHi Alert - When active, indicates that the Process Variable has exceeded the value of the Process Variable
High High Alert Threshold. Analog Output set to jumperselected alarm current.
D A: PV Hi Alert - When active, indicates that the Process Variable has exceeded the value of the Process Variable
High Alert Threshold.
D A: PV Out of Limits - Primary Variable value is beyond its operating limit.
Variables
Field Communicator Service Tools > Variables (3-2)
Follow the prompts on the Field Communicator display to view the following analog output variables.
PV is— Indicates the type of measurement either level, interface (the interface of two liquids of different specific
gravities), or density (measures the liquid specific gravity). The process variable displayed and measured depends on
the entry for “PV is” under PV Setup.
Primary Variable
D PV Value— Indicates the current process variable (level, interface, or density) in engineering units.
D % Range— Indicates the current process variable in percent of the span determined by the lower range value and
the upper range value.
Refer to figure 5‐1. If the digital level controller is setup for direct action (i.e., the lower range value is less than the
upper range value), 0% range corresponds to the lower range value (LRV) and 100% range corresponds to the upper
range value (URV). If the digital level controller is setup for reverse action (i.e., the lower range value is greater than the
upper range value), 0% range corresponds to the upper range value (URV) and 100% range corresponds to the lower
range value (LRV). Use the following equation to calculate the % range values:
PV(%range) +
(PV
EU
* LRV)
(URV * LRV)
100
where:
PV
EU
= process variable in engineering units
The LRV always represents the 0% range value and the URV always represents the 100% range value.
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