Yokogawa EJX440A - Manual (Page 3)

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IM 01C25T01-01E
3.5.8 Trim Analog Output ..........................................................................3-20
3.5.9 Burst Mode .......................................................................................3-22
3.5.10 Multidrop Mode ................................................................................3-22
3.5.11 External Switch Mode ......................................................................3-23
3.5.12 CPU Failure Burnout Direction and Hardware Write Protect ..........3-24
3.5.13 Software Write Protect .....................................................................3-24
3.5.14 Signal Characterizer ........................................................................3-26
3.5.15 Process Alarm ..................................................................................3-27
3.5.16 Status Output (option code AL) ........................................................3-27
3.5.17 Capillary Fill Fluid Density Compensation ......................................3-29
4. Diagnostics ............................................................................................... 4-1
4.1 Self-Diagnostics ................................................................................................4-1
4.1.1
Identify Problems by Using the Communicator .................................4-1
4.1.2 Checking with Integral Indicator .........................................................4-1
4.2 Advanced Diagnostics .....................................................................................4-2
4.2.1
Multi-sensing Process Monitoring ......................................................4-2
4.2.2 Impulse Line Blockage Detection (ILBD) ...........................................4-2
4.2.2.1 Blockage Detection ............................................................4-4
4.2.2.2 Combination of Reference Result and Blockage Detection
...........................................................................................4-6
4.2.2.3 Operation Parameters .......................................................4-7
4.2.2.4 Operating Procedure .........................................................4-8
4.2.2.5 Alarm and Alert Setting ......................................................4-9
4.2.2.6 Condition Check .............................................................. 4-11
4.2.2.7 Obtain Reference Values ................................................. 4-11
4.2.2.8 Capability Test of Blockage Detection Operation ............4-12
4.2.2.9 Start ILBD Operation .......................................................4-13
4.2.2.10 Tuning ..............................................................................4-13
4.2.2.11 Reset of Reference Value ................................................4-14
4.2.2.12 ILBD Parameter List ........................................................4-15
4.2.3 Heat Trace Monitoring......................................................................4-17
4.2.3.1 Flg Temp Coef Setting .....................................................4-17
4.2.3.2 Out of Temperature Measurement Range .......................4-18
4.2.3.3 Parameter Lists for Heat Trace Monitoring ......................4-18
4.3 Alarms and Countermeasures ......................................................................4-19
5. Parameter Summary ................................................................................ 5-1
Appendix 1. Safety Instrumented Systems Installation ..............................A-1
A1.1 Scope and Purpose ......................................................................................... A-1
A1.2 Using the EJX for an SIS Application ............................................................ A-1
A1.2.1
Safety Accuracy .................................................................................A-1
A1.2.2 Diagnostic Response Time ................................................................A-1
A1.2.3 Setup ..................................................................................................A-1