Endress+Hauser Differential pressure Deltabar FMD77

Differential pressure transmitter with one diaphragm seal for level measurement

Category: E+H

Differential pressure transmitter with one diaphragm seal for level measurement

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
Successor	PMD78B
Specialities	Diagnostic functions