Yokogawa EJA440E - Manual (Page 93)

A2-3
IM 01C25T01-06EN
Checklist (3/5)
Go to the following step according to the result of "Invalid Ref xx" shown in the Diag Error of 8th check item.
Diag Error Check
item Invalid Ref SPH Invalid Ref SPL Invalid Ref DP
  
→
10-a
  
→
10-b
 : The alarm is generated.
 : The alarm is not generated.
No. Items Parameters Result Example
10-a Simulation of Blockage detection operation
• H Side Blocking: 10-a-1
• L Side Blocking: 10-a-2
• Both Side Blocking: 10-a-3
10-a-1 H Side Blocking
• Close the high-pressure side valve
completely.
• 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
fSPh* 7.14085E-09
BlkF -0.287259
• Record the status of Checkbox in Diag
Option.
• Check that the alarms status of “A Blocking”
and “H Side Blocking” are 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 “H Side Blocking” is
generated.
• Check that the alarm of “L Side Blocking” is
not generated.
Diag Error
L Side Blocking
 
H Side Blocking  