Yokogawa EJX930A - Manual (Page 171)

<Appendix 8. Advanced Diagnostics>
A8-21
IM 01C25R03-01E
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
valve is closed;
• Record the values of VALUE_# after
the certain time, (DIAG_PERIOD ×
DIAG_COUNT), passed.
*: Record the value after checked that
the status is “GOOD”.
VALUE_FDP (Index: 2103) 7.48562e-9
VALUE_FSPH (Index: 2105) 7.14085e-9
For the case that the low-pressure side
valve is closed;
• Record the values of VALUE_# after
the certain time, (DIAG_PERIOD ×
DIAG_COUNT), passed.
*: Record the value after checked that
the status is “GOOD”.
VALUE_FDP (Index: 2103) 7.48562e-9
VALUE_FSPL (Index: 2104) 7.23277e-9
• Record the status of Checkbox in
DIAG_OPTION.
• Check that the alarms status of “B
Blocking” is set.
Note: If the alarm of “Outside Diagnosis
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 (Index: 2089)
A Blocking  
Large Fluctuation of Low Side  
Large Fluctuation of High Side  
Low Side Blocking  
High Side Blocking  
B Blocking  
Invalid Ref BlkF  
Invalid Ref fSPh  
Invalid Ref fSPl  
Invalid Ref fDP  
Outside Diagnosis Range  
Reflect Blockage to PV/SV/TV
Status
 
• Check that the alarm of “B Blocking” is
generated.
DIAG_ERR (Index: 2086)
B Blocking  