Yokogawa EJX930A - Manual (Page 101)

A2-5
IM 01C25R02-01E
Checklist (5/5)
No. Items Parameters Result Example
10-b Simulation of Blockage detection operation
• Close completely the valve for the side where
the alarm of Invalid Reference Value is not
generated.
For the case that the high-pressure side value is
closed;
• Record the values of fDP, fSPl, fSPh, BlkF,
and DPAvg after the certain time,
( Diag Period X Diag Supp Count), passed.
*: Record the value after checked that the
status is “GOOD”.
fDP* 7.48562E-09
fSPh* 7.14085E-09
For the case that the low-pressure side value is
closed;
• Record the values of fDP, fSPl, fSPh, BlkF,
and DPAvg after the certain time,
( Diag Period X Diag Supp Count), passed.
*: Record the value after checked that the
status is “GOOD”.
fDP* 7.48562E-09
fSPI* 7.23277E-09
• Record the status of Checkbox in Diag
Option.
• Check that the alarms status of “B Blocking” is
set.
Note: If the alarm of “ILBD over range” is generated,
the valve may be closed too much tightly. Open
valve a little and record the updated status of the
parameters.
Diag Option
A Blocking  
Large Fluct L  
Large Fluct H  
L Side Blocking  
H Side Blocking  
B Blocking  
Invalid Ref F  
Invalid Ref SPH  
Invalid Ref SPL  
Invalid Ref DP  
ILBD over range  
• Check that the alarm of “B Blocking” is not
generated.
Diag Error
B Blocking  