Flowserve Logix MD+ ValveSight - Manual (Page 172)

ValveSight™ Diagnostics DTM Manual for Logix MD+ Positioner with HART®
FCD- LGENSF0014-00
© Flowserve Corporation
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HDRL Test
The HDRL page allow you to adjust settings and run an HDRL test. Hysteresis, Deadband,
Repeatability and Linearity (HDRL) tests are powerful tools for bench marking valve
performance in a shop or installed valves that are not in service. By stepping the valve up
and down through these preset points and monitoring the response, a valve assembly can
quickly be tested and verified that it is operating to specification.
CAUTION: During a test the valve will not respond to control signals and movement of the
valve stem will occur.
Status Area
The Active Indicator area shows the status of the most relevant active indicator. The color
of the "LED light" corresponds to the Active Indicator and the first color of the blink code
sequence on the positioner. Generally green indicates no immediate issues. Yellow
indicates a developing issue. Red indicates the ability to control may be compromised. A
detailed list of the indicators is given in the
Alarm Congfiguraion - Alarm Annunicator page.
The Command Source field indicates weather the positioner is being controlled by digital or