Differential pressure Deltabar FMD78

Differential pressure Deltabar FMD78 – Differential pressure transmitter with two diaphragm seals for differential pressure and level

Specifications:

Measuring Principle	Differential pressure
Characteristic	Digital transmitter with metallic measuring diaphragms diaphragm seals and capillaries; Modular transmitter; Long-term stability; Secondary process barrier; enhanced safety via self diagnostic functions.
Supply Voltage	4...20 mA 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	0.08 % of URL/ year; 0.14 % of URL/ 5 years; 0.27 % of URL/ 10 years
Process Temperature	-70°C...400°C (-94°F...752°F)
Ambient Temperature	-50°C...85°C (-58°F...185°F)
Measuring Cell	100 mbar...40 bar (40 inH2O...600 psi)
Smallest Calibratable Span	5 mbar (0.075 psi)
Vacuum Resistance	50 mbar (0.73 psi)
Max. Turn Down	100:1
Max. Overpressure Limit	160 bar (2400 psi)
Process Connection	Diaphragm seal (Pancake, threads); Flanges (DIN, ASME); Hygienic connections Tri-Clamp ISO2852
Process Connection Hygienic	Tri-Clamp; DIN11851; NEUMO; Varivent; SMS; DRD; Universal adapter
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
Communication	4...20 mA HART; PROFIBUS PA; FOUNDATION Fieldbus
Certificates / Approvals	ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI, EAC, UK Ex
Safety Approvals	SIL
Design Approvals	NACE MR0175; EN10204-3.1
Hygienic Approvals	3A, FDA
Marine Approvals	GL/ ABS
Specialities	Diagnostic functions; TempC Membrane
Successor	PMD78B

Field of application

The Deltabar FMD78 differential pressure transmitter with metal sensor uses two capillary diaphragm seals. Typically used in process and hygiene applications for continuous measurement of pressure differences in liquids, vapors, gases and dusts. The integrated HistoROM data module makes the management of process and device parameters easy. Designed according to IEC 61508 for use in SIL3 safety applications.

For differential pressure, level, volume or mass measurement in liquids.

Process connections: Threads, flanges, pancake and hygienic connections
Process temperature: -70 up to +400°C (-94 to +752°F)
Measuring ranges: 100mbar to +40 bar (1.5 to 600psi)
Accuracy: ±0.075%
International explosion protection certificates, overfill prevention WHG, hygienic approvals, marine approvals, SIL

Benefits

Large variety of different process connections and membrane materials
New TempC Membrane for diaphragm seals: Minimum temperature effects and short recovery times
Highest safety due to gas tight feedthrough with capabilities up to SIL2/3, certified to IEC 61508
Easy menu-guided commissioning via local display, 4 to 20 mA with HART, PROFIBUS PA, FOUNDATION Fieldbus
HistoROM data management concept for fast and easy commissioning, maintenance and diagnostics
Cost savings with modular concept for easy replacement of sensor, display or electronics
Seamless and independent system integration (HART/PA/FF)