Differential pressure Deltabar FMD77

Differential pressure Deltabar FMD77 – Differential pressure transmitter with one diaphragm seal for level measurement

Specifications:

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	0.08 % of URL/ year; 0.14 % of URL/ 5 years; 0.27 % of URL/ 10 years
Process Temperature	-40°C...400°C (-40°F...752°F)
Ambient Temperature	-50°C...85°C (-58°F...185°F)
Measuring Cell	100 mbar...16 bar (40 inH20...240 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	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
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
Specialities	Diagnostic functions
Successor	PMD78B

Field of application

The Deltabar FMD77 differential pressure transmitter with metal sensor uses a one-sided diaphragm seal or diaphragm seals on both sides with a capillary on the low pressure side. Typically used in the process industry for continuous level measurement in liquids. 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 level, volume or mass measurement in liquids.

Process connections: Threads and flanges
Temperature: -70 to +400°C (-94 to +752°F)
Measuring ranges: +100mbar to +16bar (+1.5 to +240psi)
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
Highest safety due to gas-tight feedthrough with capabilities up to SIL2/3, certified to IEC 61508
New TempC Membrane minimizes influences of ambient and process temperature fluctuations
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)