Deltabar FMD78 - Differential Pressure
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.
Benefits
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Large variety of different process connections and membrane materials
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New TempC Membrane for diaphragm seals: Minimum temperature effects and short recovery times
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Highest safety due to gastight feedthrough with capabilities up to SIL2/3, certified to IEC 61508
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Easy menu-guided commissioning via local display, 4 to 20 mA with HART, PROFIBUS PA, FOUNDATION Fieldbus
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HistoROM data management concept for fast and easy commissioning, maintenance and diagnostics
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Cost savings with modular concept for easy replacement of sensor, display or electronics
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Seamless and independent system integration (HART/PA/FF)
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Field of application
For differential pressure, level, volume or mass measurement in liquids.
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Process connections: Threads, flanges, pancake and hygienic connections
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Process temperature: -70 up to +400°C (-94 to +752°F)
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Measuring ranges: 100mbar to +16bar (1.5 to 240psi);
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Accuracy: ±0.075%
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International explosion protection certificates, overfill prevention WHG, hygienic approvals, marine approvals, SIL
Features and specifications
| Measuring Principle | Differential pressure | |
| Characteristic / Application |
Digital transmitter with metallic measuring diaphragms diaphragm seals and capillaries Modular transmitter Long term stability Enhanced safety via self diagnostic functions Secondary process barrier |
|
| Supply / Communication |
4...20 mA HART: 10,5...45V DC Ex ia: 10,5...30V DC PROFIBUS PA / FOUDATION Fieldbus: 9...32V DC |
|
| Accuracy | 0,075% + influence of diaphragm seal | |
| Long term stability | 0,05% of URL/year | |
| Ambient temperature |
-40°C...85°C (-40°F...185°F) |
|
| Process temperature |
-40°C...400°C (-40°F...662°F) |
|
| Process pressure absolute / max. overpressure limit | 160bar (2400 psi) | |
| Pressure measuring range |
100mbar...40bar (1.5psi ... 600 psi) |
|
| Main wetted parts |
Alloy C276 316L Monel Tantalum |
|
| Process connection |
Diaphragm seal (Pancakes, threads) Flanges (DIN, ASME) Tri-Clamp ISO2852 Hygienic connections |
|
| Process connection hygienic |
Tri-Clamp DIN11851 NEUMO Varivent SMS DRD Universal adapter |
|
| Max. measurement distance | 400m (1312ft) H2O | |
| Communication |
4...20 mA HART PROFIBUS PA FOUNDATION Fieldbus |
|
| Certificates / Approvals |
ATEX, FM, CSA, CSA C/US, IECEx, NEPSI, INMETRO SIL NACE Marine WHG/ Overfill prevention EN10204-3.1 3A |
|
| 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...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 |
-70°C...400°C (-94°F...752°F) |
|
| Ambient temperature |
-40°C...85°C (-40°F...185°F) |
|
| Measuring cell |
100mbar...40bar (40inH2O...600psi) |
|
| Smallest calibratable span | 5 mbar (0.075 psi) | |
| Vacuum resistance | 50 mbar (7.25psi) | |
| Max. Turn down | 100:1 | |
| Max. overpressure limit |
160bar (2400psi) |
|
| Process connection |
Diaphragm seal (Pancake, threads) Flanges (DIN, ASME) Hygienic connections Tri-Clamp ISO2852 |
|
| 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...20mA HART PROFIBUS PA FOUNDATION Fieldbus |
|
| Certificates / Approvals |
ATEX, FM, CSA, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI |
|
| Safety approvals |
SIL WHG/ Overfill prevention |
|
| Design approvals |
NACE MR0175 EN10204-3.1 |
|
| Hygienic approvals |
3A, FDA |
|
| Marine approvals |
GL/ ABS |
|
| Specialities |
Diagnostic functions TempC Membrane |
|