Yokogawa EJA440E User Manual download pdf (Page 95)

<Appendix2. ILBD Check List>

A2-5

IM 01C25T01-06EN

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

 

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