
Levelflex FMP51, FMP52, FMP54
2 Endress+Hauser
Table of contents
Important document information ............... 4
Symbols .................................... 4
Function and system design ................... 6
Measuring principle ............................ 6
Measuring system ............................ 10
Input .................................... 12
Measured variable ............................ 12
Measuring range ............................. 12
Blocking distance ............................ 14
Measuring frequency spectrum ................... 14
Output .................................. 15
Output signal ............................... 15
Signal on alarm .............................. 16
Linearization ............................... 16
Galvanic isolation ............................ 16
Protocol-specific data .......................... 17
Energieversorgung ......................... 22
Terminal assignment .......................... 22
Device plug connectors ......................... 30
Power supply ............................... 31
Power consumption ........................... 33
Current consumption .......................... 33
Power supply failure .......................... 34
Potential equalization ......................... 34
Terminals ................................. 34
Cable entries ............................... 34
Cable specification ............................ 34
Overvoltage protection ......................... 35
Performance characteristics .................. 36
Reference operating conditions ................... 36
Maximum measured error ....................... 36
Resolution ................................. 39
Reaction time ............................... 39
Influence of ambient temperature ................. 39
Influence of gas layer .......................... 40
Gas phase compensation with external pressure sensor
(PROFIBUS PA / FOUNDATION Fieldbus) ............ 40
Gas phase compensation with reference signal (option for
FMP54) ................................... 41
Mounting ................................ 43
Mounting requirements ........................ 43
Operating conditions: Environment ............ 68
Ambient temperature range ..................... 68
Ambient temperature limits ..................... 68
Storage temperature .......................... 75
Climate class ............................... 75
Altitude according to IEC61010-1 Ed.3 .............. 75
Degree of protection .......................... 75
Vibration resistance ........................... 75
Cleaning the probe ........................... 75
Electromagnetic compatibility (EMC) ............... 75
Process .................................. 76
Process temperature range ...................... 76
Process pressure range ......................... 76
Dielectric constant (DC) ........................ 77
Expansion of the rope probes through temperature ...... 77
Mechanical construction .................... 78
Dimensions ................................ 78
Tolerance of probe length ....................... 85
Surface roughness of AlloyC-coated flanges ........... 85
Shortening probes ............................ 85
Weight ................................... 86
Materials: GT18 housing ........................ 87
Materials: GT19 housing ........................ 88
Materials: GT20 housing ........................ 89
Materials: Process connection .................... 91
Materials: Probe ............................. 92
Materials: Mounting bracket ..................... 94
Materials: Adapter and cable for remote display ........ 95
Materials: Weather protection cover ................ 96
Operability ............................... 97
Operating concept ............................ 97
Local operation .............................. 97
Operation with remote display and operating module
FHX50 ................................... 98
Remote operation ............................ 98
Integration in tank gauging system ................ 102
System integration via Fieldgate .................. 103
Certificates and approvals .................. 104
CE mark .................................. 104
C-Tick symbol .............................. 104
Ex approval ............................... 104
Dual seal according to ANSI/ISA 12.27.01 ........... 104
Functional Safety ............................ 104
Overfill prevention ........................... 104
Sanitary compatibility ......................... 104
AD2000 .................................. 105
NACE MR 0175 / ISO 15156 .................... 105
NACE MR 0103 ............................ 105
ASME B31.1 and B31.3 ....................... 105
Pressure Equipment Directive ................... 105
Steam boiler approval ......................... 105
Marine certificate ........................... 105
Telecommunications ......................... 105
CRN-Zulassung ............................. 105
Track record ............................... 107
Test, Certificate ............................. 108
Other standards and guidelines .................. 109
Ordering information ...................... 110
Ordering information ......................... 110
3-point linearity protocol ...................... 111
5-point linearity protocol ...................... 112
Customized parametrization .................... 114