Yokogawa EJX115A - Manual (Page 56)

<4. Diagnostics>
4-9
IM 01C25T01-06EN
Ref fDP: OK
Ref fSPI: OK
Ref fSPh: OK
Ref BlkF: OK
Fluctuation Parameters
• Test for low-pressure side
• Test for high-pressure side
• Test for both-pressure sides
Simulation Test
• B Blocking detection
(by using Ratio fDP)
• L Side Blocking detection
(by using Ratio fSPI)
• H Side Blocking detection
(by using Ratio fSPh)
• H/L Side Blocking detection
(by using BlkF)
Ref fDP: OK
Ref fSPI: OK
Ref fSPh: OK
Ref BlkF: NG
• Test for low-pressure side
• Test for high-pressure side
• Test for both-pressure sides
• A/B Blocking detection
(by using Ratio fDP)
• L Side Blocking detection
(by using Ratio fSPl)
• H Side Blocking detection
(by using Ratio fSPh)
Ref fDP: OK
Ref fSPI: NG
Ref fSPh: OK
Ref BlkF: NG
• Test for high-pressure side
• A Blocking detection
(by using Ratio fDP)
• H Side Blocking detection
(by using Ratio fSPh)
Ref fDP: OK
Ref fSPI: NG
Ref fSPh: NG
Ref BlkF: NG
• Test for both-pressure sides
• B Blocking detection
(by using Ratio fDP)
Available Blockage Detection
[Differential pressure measurement]
[Gauge/absolute pressure and level measurement]
Ref fDP: OK
Fluctuation Parameters Simulation Test
• Test for high-pressure side
• B Blocking detection
(by using Ratio fDP)
Available Blockage Detection
F0405.ai
4.2.2.3 Operation Parameters
 Diag Mode
Diag Mode gives the directive for the ILBD
operation. There are following three modes.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Diag/Service
→ Diag Parameters → ILBD
Parameters → Configuration → Set
Diag Mode →
EJX_HART 5[1.2]
DTM
Diag and Service → Advanced Diag
Configurations → Impulse Line
Blockage Detection → Diag Mode
→
Diag Mode
Mode Function
Stop The blockage detection operation is
stopped.
Calculation The blockage detection operation is
performed.
Alarms are generated along with the
result.
Reference Reference values for the blockage
detection are obtained and updated to the
latest. After sampling reference values,
this mode changes to "Calculation".
When the blockage detection operation is
performed, set “Calculation” to Diag Mode. “Stop”
must be set when you change a threshold value or
set an alarm. “Reference” is set in order to obtain
the reference fluctuation values under the normal
configuration.