Samson 373 Series - Page 36

End position
trend
Zero point shift downwards
monotonic
Average value above the
reference line
Check plug and seat
Reset
lower end position trend
Zero point shift upwards
monotonic
Average value above the
reference line
Zero point fluctuates
Average value above the
reference line
Zero point shift downwards
monotonic
Average value below the
reference line
Zero point shift upwards
monotonic
Average value below the
reference line
Zero point fluctuates
Average value below the
reference line
Mechanical
connection
linking
positioner/
control valve
Possible restriction of the full
range of valve
Check attachment
Reset
e short-term histogram
Full range of
valve
Mainly near to CLOSED
position
Reconsider whether the
working range is
suitable
Reset
x long-term histogram
Mainly near to max. OPEN
Mainly CLOSED position
Mainly max. OPEN
36 EB 8388 EN
Troubleshooting