FMD77 Differential pressure transmitter
FMD77 Differential pressure transmitter
Name: FMD77 Differential pressure transmitter
Differential pressure transmitter with one diaphragm seal for level measurement.
Description
Measuring Principle Differential pressure
Characteristic Digital transmitter with metallic measuring diaphragms, one side with diaphragm seal
Modular transmitter
Long-term stability
Secondary process barrier
enhanced saftey via self diagnostic functions
Supply voltage 4...20mA HART
10,5...45V DC (Non Ex):
Ex ia: 10,5...30V DC
PROFIBUS PA:
9...32 V DC (Non Ex)
FOUNDATION Fieldbus:
9...32 V DC (Non Ex)

 
Reference Accuracy 0,075% + influence of diaphragm seal
Long term stability 0,05% of URL/year 
0,125% of URL/5 years 

 
Process temperature -40°C...400°C
(-40°F...752°F)
Ambient temperature -40°C...85°C
(-40°F...185°F)
Measuring cell 100mbar...16 bar
(40 inH20...240psi)
Smallest calibratable span 5 mbar (0.075 psi)
Vacuum resistance 50 mbar (7.25psi)
Max. Turn down 100:1
Max. overpressure limit 160bar
(2400 psi)
Process connection Low pressure side:
1/4-18NPT
RC1/4"
High pressure side:
Flanges (DIN, ASME, JIS)
Material process membrane 316L, AlloyC,
Tantal, 
Gold-Rhodium,
PTFE
Material gasket None, diaphragm seal welded 
Fill fluid Silicone oil,
Inert oil,
Vegetable oil
Low- temperature oil
High- temperature oil

 
Material housing 316L, Die-cast aluminum 
Output 4...20mA HART
PROFIBUS PA
FOUNDATION Fieldbus
Certificates / Approvals ATEX, FM, CSA, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
SIL
NACE
WHG/ Overfill prevention
EN10204-3.1
Options HistoROM/M-Dat
4-line digital display
SS- or Aluminium housing
Separate housing 

 
Specialities Diagnostic functions