Endress+Hauser Deltabar S PMD75, Deltabar S FMD76, Deltabar S PMD70, Deltabar S FMD77, Deltabar S FMD78 Technical Information
Technical Information
Deltabar S PMD70/75, FMD76/77/78
Differential pressure measurement
Differential pressure transmitter with ceramic and silicon sensors
Overload-resistant and function-monitored; Communication via
HART, PROFIBUS PA or FOUNDATION Fieldbus
Application
The Deltabar S differential pressure transmitter is used
for the following measuring tasks:
• Flow measurement (volume or mass flow) in
conjunction with primary devices in gases, vapors and
liquids
• Level, volume or mass measurement in liquids
• Differential pressure monitoring, e.g. of filters and
pumps
• International usage thanks to a wide range of approvals
Your benefits
• Very good reproducibility and long-term stability
• High reference accuracy: up to r0.075 %,
as PLATINUM version: r0.05 %
• Turn down up to 100:1, higher on request
• Used for flow and differential pressure monitoring
up to SIL 3, certified to IEC 61508 by TÜV SÜD
• HistoROM
• Function-monitored from the measuring cell to the
electronics
• Continuous modularity for differential pressure,
hydrostatics and pressure (Deltabar S, Deltapilot S,
Cerabar S), e.g.
– replaceable display
– universal electronics
• Quick commissioning with Quick Setup menu
• Menu-guided operation
• Extensive diagnostic functions
• New TempC diaphragm for diaphragm seals:
Minimum temperature effects and short recovery
times
®
/M-DAT memory module
TI00382P/00/EN/19.14
No. 71254471
Table of contents
Deltabar S
Function and system design. . . . . . . . . . . . . . . . . . . . . 4
Device selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Flow measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Level measurement (level, volume and mass) . . . . . . . . . . . . . . . . 7
Communication protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Explanation of terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Signal range – 4 to 20 mA HART . . . . . . . . . . . . . . . . . . . . . . . . 10
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Load – 4 to 20 mA HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dead time, time constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Dynamic behavior: current output . . . . . . . . . . . . . . . . . . . . . . . 11
Dynamic behavior: digital output (HART electronics) . . . . . . . . . 11
Dynamic behavior: PROFIBUS PA . . . . . . . . . . . . . . . . . . . . . . . . 12
Dynamic behavior: FOUNDATION Fieldbus . . . . . . . . . . . . . . . . 13
Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Protocol-specific data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Influence of the operating pressure on zero point and span –
PMD70, FMD76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Total performance – PMD70, FMD76 . . . . . . . . . . . . . . . . . . . . 26
Long-term stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Total error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Warm-up period – PMD70, FMD76 . . . . . . . . . . . . . . . . . . . . . 27
Operating conditions (Installation) . . . . . . . . . . . . . . 28
General installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . 28
Measuring arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Wall and pipe-mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
"Separate housing" version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Turning the housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Oxygen applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Ultrapure gas applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Applications with hydrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Operating conditions (Environment) . . . . . . . . . . . . . 33
Ambient temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Overvoltage protection (optional) . . . . . . . . . . . . . . . . . . . . . . . . 33
Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Cable specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Residual ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Influence of power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Performance characteristics – general . . . . . . . . . . . . 22
Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Influence of the installation position . . . . . . . . . . . . . . . . . . . . . . 22
Vibration effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Performance characteristics – metal process isolating
diaphragms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Reference accuracy – PMD75, FMD77, FMD78 . . . . . . . . . . . . . 23
Thermal change of the zero output and the output span –
PMD75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Influence of the operating pressure on zero point and span – PMD75,
FMD77, FMD78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Total performance – PMD75 . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Long-term stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Total error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Warm-up period – PMD75, FMD77, FMD78 . . . . . . . . . . . . . . . 25
Performance characteristics – ceramic process isolating
diaphragms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Reference accuracy – PMD70, FMD76 . . . . . . . . . . . . . . . . . . . 26
Thermal change of the zero output and the output span – PMD70,
FMD76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Operating conditions (Process) . . . . . . . . . . . . . . . . . 34
Process temperature limits (temperature at transmitter) . . . . . . . 34
Process temperature range, seals . . . . . . . . . . . . . . . . . . . . . . . . 34
Pressure specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 36
Dimensions of T14 housing, optional display on the side . . . . . . . 36
Dimensions of T15 housing, optional display on the top . . . . . . . 36
Dimensions of T17 housing (hygienic), optional display on
the side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Process connections PMD70 with ceramic process isolating
diaphragms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Process connections PMD70 with ceramic process isolating
diaphragms (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Process connections PMD75 with metal process isolating
diaphragms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Process connections PMD75 with metal process isolating
diaphragms (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Process connections PMD75 with metal process isolating
diaphragms (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Process connection FMD76 with ceramic process isolating
diaphragms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Process connection FMD76 with ceramic process isolating
diaphragms (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Process connection FMD76 with ceramic process isolating
diaphragms (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Process connections FMD77 with diaphragm seal,
low-pressure side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Process connections FMD77 with diaphragm seal,
high-pressure side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Process connections FMD77 with diaphragm seal,
high-pressure side (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . 47
2 Endress+Hauser
Deltabar S
Process connections FMD77 with diaphragm seal,
high-pressure side (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Process connections FMD77 with diaphragm seal,
high-pressure side (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . 49
FMD78 basic device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Process connections FMD78 with diaphragm seal . . . . . . . . . . . . 51
Process connections FMD78 with diaphragm seal (continued) . . 52
Process connections FMD78 with diaphragm seal (continued) . . 53
Process connections FMD78 with diaphragm seal (continued) . . 55
Process connections FMD78 with diaphragm seal (continued) . . 57
Process connections FMD78 with diaphragm seal (continued) . . 58
Process connections FMD78 with diaphragm seal (continued) . . 59
Wall and pipe mounting with mounting bracket or separate
housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Material (not wetted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Material (wetted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Filling oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Local operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Hardware and software for onsite and remote operation . . . . . . . 69
Planning instructions, diaphragm seal systems . . . . . 71
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Design and operation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Diaphragm seal filling oils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Operating temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Response time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Cleaning instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
FMD77 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
FMD78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
FMD78 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
FMD78 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
FMD78 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Additional documentation . . . . . . . . . . . . . . . . . . . . . 95
Field of Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Brief Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Functional safety manual (SIL) . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Installation/Control Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Overfill prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Configuration data sheet . . . . . . . . . . . . . . . . . . . . . . 97
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Registered trademarks. . . . . . . . . . . . . . . . . . . . . . . 100
HART® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
PROFIBUS® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
FOUNDATION™ Fieldbus . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Certificates and approvals . . . . . . . . . . . . . . . . . . . . . 77
CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Ex approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Suitability for hygienic processes . . . . . . . . . . . . . . . . . . . . . . . . 77
Marine certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Functional Safety SIL / IEC 61508 Declaration of Conformity
(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Overfill prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
CRN approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Pressure Equipment Directive (PED) . . . . . . . . . . . . . . . . . . . . . 77
Standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Classification of process sealing between electrical systems and
(flammable or combustible) process fluids in accordance with ANSI/
ISA 12.27.01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . 79
PMD70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
PMD70 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
PMD70 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
PMD75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
PMD75 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
PMD75 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
FMD76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
FMD76 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
FMD76 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
FMD77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
FMD77 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
3 Endress+Hauser
Device selection
+ –
+ –
Deltabar S
Function and system design
Deltabar S –
PMD70 PMD75 FMD76 FMD77 FMD78
product family
P01-PMD70xxx-16-xx-xx-xx-000
With ceramic process
isolating diaphragms
P01-PMD75xxx-16-xx-xx-xx-000
With metal process
isolating diaphragms
P01-FMD76xxx-16-xx-xx-xx-000
With ceramic process
isolating diaphragms
With metal process
isolating diaphragms
and diaphragm seal
mounted on one side
Field of application – Flow
– Level
– Differential pressure
Process connections – 1/4 – 18 NPT
–RC 1/4
Measuring ranges From –25 to +25 mbar
(-0.375 to +0.375 psi)
to –3 to +3 bar
(-45 to +45 psi)
1)
OPL
On one side: up to
100 bar (1500 psi)
On both sides: up to
150 bar (2250 psi)
Process temperature
range (temperature at
–20 to +85°C
(–4 to +185°F)
–Flow
– Level
– Differential pressure
–1/4 – 18 NPT
–RC 1/4
From –10 to +10 mbar
(-0.15 to +0.15 psi)
to –40 to +40 bar
(-600 to +600 psi)
On one side: up to
420 bar (6300 psi)
On both sides: up to
630 bar (9450 psi)
–40 to +85°C
(–40 to +185°F)
process connection)
Ambient temperature
range
–20 to +85 °C
(-4 to +185 °F)
–40 to +85°C
(–40 to +185°F)
Ambient temperature
range, separate housing
Reference accuracy – Up to r0.075 % of the set span
2)
– Level – Level – Level
Low-pressure side (–):
–1/4 – 18 NPT
–RC 1/4
High-pressure side (+):
– DN 80 – DN 100
–ANSI 3" – 4"
– JIS 80A – 100A
From –100 to +100
mbar (-1.5 to +1.5 psi)
to –3 to +3 bar
(-45 to +45 psi)
On one side: up to
100 bar (1500 psi)
Low-pressure side (–):
–1/4 – 18 NPT
–RC 1/4
High-pressure side (+):
– DN 50 – DN 100
–ANSI 2" – 4"
– JIS 80A – 100A
From –100 to +100 mbar
(-1.5 to +1.5 psi)
to –16 bar to +16 bar
(-240 to +240 psi)
On one side: up to
160 bar (2400 psi)
On both sides: up to
240 bar (3600 psi)
–20 to +85°C
(–4 to +185°F)
Up to +400 °C (752 °F)
(depending on the filling
oil)
–20 to +85°C
(-4 to +185 °F)
–40 to +85 °C
(-40 to +185 °F)
-20 to +60°C
(-4 to +122 °F)
–Up to r0.075 % of the set span
– PLATINUM version: up to r0.05 % of the set span
Supply voltage – Version for non-hazardous areas:
– 4...20 mA HART: 10.5 to 45 V DC
– PROFIBUS PA and FOUNDATION Fieldbus: 9 to 32 V DC
– Ex ia: 10.5 to 30 V DC
Output 4 to 20 mA with superimposed HART protocol, PROFIBUS PA or FOUNDATION Fieldbus
Options – High-pressure version up to p
– PMD75, FMD77, FMD78: gold-rhodium-coated process isolating diaphragm, NACE-compliant material
700 bar (10500 psi)
stat
– Separate housing
P01-FMD77xxx-16-xx-xx-xx-000
2)
P01-FMD78xxx-16-xx-xx-xx-003
With metal process
isolating diaphragms
and capillary
diaphragm seals
– Differential pressure
– Wide range of
diaphragm seals
From –100 to +100 mbar
(-1.5 to +1.5 psi)
to –40 to +40 bar
(-600 to +600 psi)
On one side: up to
160 bar (2400 psi)
On both sides: up to
240 bar (3600 psi)
Up to +400 °C (752 °F)
(depending on the filling
oil)
–40 to +85 °C
(-40 to +185 °F)
2)
4 Endress+Hauser
Deltabar S
➀
➁
➃
➂
➄
1
p
2
p
1
p
2
p
➆
➇
➈
➅
Deltabar S –
product family
Specialties
(options)
1) OPL: over pressure limit; dependent on the lowest-rated element, with regard to pressure, of the selected components
2) Lower temperatures on request
Measuring principle
PMD70 PMD75 FMD76 FMD77 FMD78
– Metal-free
measurement with
PVDF flange
– Available with
Deltatop as flow
compact device
–HistoROM
®
/M-DAT memory module
Ceramic process isolating diaphragm used for
PMD70 and FMD76
–p
to 420 bar
stat
(6300 psi)
– Process isolating
diaphragm: tantalum
– Available with
Deltatop as flow
compact device
– Abrasion-resistant and
corrosion-resistant
– No diaphragm-seal
temperature effects
– Metal-free
measurement possible
with ECTFE-coated
process connection
–For high media
temperatures
Metal process isolating diaphragm used for PMD75,
FMD77 and FMD78
– Wide range of
diaphragm seals
P01-xMD7xxxx-03-xx-xx-xx-000
1 Meter body
2 Process isolating diaphragm
3Electrodes
4 Glass frit fixes the process isolating diaphragm
onto the meter body
5Temperature sensor
6 Sensing element
7 Middle diaphragm
8 Filling oil
9 Process isolating diaphragm
P01-xMD7xxxx-03-xx-xx-xx-003
Ceramic process isolating diaphragm used for PMD70 and FMD76
The ceramic measuring cell is based on the principle of a plate capacitor with an electrode on a meter body (1)
and a movable electrode on the interior of the diaphragm (3). Silicone oil or mineral oil are used as the standard
filling oils for this measuring cell.
A differential pressure (p
zp2) causes a corresponding deflection of both diaphragms. Both capacitance values
1
are converted and are fed to the microprocessor of the transmitter as a digital signal.
Advantages:
• Self-monitoring for process isolating diaphragm break or oil loss (constant comparison of the measured
temperature with a temperature calculated from the capacitance values)
• Extremely high resistance to aggressive media
• Suitable for vacuums up to 1 mbar
(0.015 psi)
abs
• Metal-free versions available
• Secondary containment for enhanced integrity
Metal process isolating diaphragm used for PMD75, FMD77 and FMD78
The process isolating diaphragms (3/9) are deflected on both sides by the acting pressures. A filling oil (4/8)
transfers the pressure to a resistance bridge (semi-conductor technology). The change in the bridge output
voltage, which depends on the differential pressure, is measured and processed further.
Advantages:
• Standard system pressures: 160 bar (2400 psi) and 420 bar (6300 psi)
• High long-term stability
• Very high single-sided overload resistance
Endress+Hauser 5
Flow measurement Design and operation mode
QQ
p
1
p
1
p
2
p
2
Q~
Δp
Q~
Δp
++
––
Flow measurement with Deltabar S and primary device, left: orifice plate and right: Pitot tube
QFlow
'p Differential pressure, 'p = p
1
– p
Deltabar S
P01-PMD7xxxx-15-xx-xx-xx-000
2
Your benefits
• Choice of four flow modes of operation: volume flow, corrected volume flow (European norm conditions),
standard volume flow (American standard conditions) and mass flow.
• Choice of diverse flow units with automatic unit conversion.
• A customized unit can be specified.
• Low flow cut off: when activated, this function suppresses small flows which can lead to large fluctuations
in the measured value.
• Contains two totalizers as standard. One totalizer can be reset to zero.
• The totalizing mode and unit can be individually set for each totalizer. This allows independent daily and
annual quantity totalizing.
• With the Deltatop product family, Endress+Hauser is offering universal and reliable solutions for flow
measurement:
– Deltatop, the compact, ready-to-use flow measuring unit including the Deltabar S differential pressure
transmitter
Note!
For more information about flow measurement with the Deltabar S differential pressure transmitter
• Deltabar S with orifice plate (TI00422P, Deltatop DO6x)
• Deltabar S with Pitot tube (TI00425P, Deltatop DP6x)
6 Endress+Hauser
Deltabar S
Level measurement (level,
volume and mass)
Design and operation mode
–
➀
+
Level measurement with Deltabar S
1 Level measurement via pressure piping and PMD70
2 Level measurement with FMD76
3 Level measurement with FMD78
h Height (level)
'p Differential pressure
U Density of the media
g Gravitation constant
➁
–
h
h=
Δp
ρ g
➂
+
P01xMD7xxxx-15-xx-xx-xx-000
Your benefits
• Choice of three level operating modes.
• Volume and mass measurements in any tank shapes by means of a freely programmable characteristic curve.
• Choice of diverse level units with automatic unit conversion.
• A customized unit can be specified.
• Has a wide range of uses, e.g.
– for level measurement in tanks with pressure overlay
– in the event of foam formation
– in tanks with agitators of screen fittings
– in the event of liquid gases
– for standard level measurement
Communication protocol • 4 to 20 mA with HART communication protocol
• PROFIBUS PA
– The Endress+Hauser devices meet the requirements of the FISCO model.
– Due to the low current consumption of 13 mA ± 1 mA, the following number of devices can be operated
on one bus segment if installing as per FISCO:
– up to 7 Deltabar S for Ex ia, CSA IS and FM IS applications
– up to 27 Deltabar S for all other applications, e.g. in non-hazardous areas, Ex nA, etc.
Further information on PROFIBUS PA can be found in Operating Instructions BA00034S "PROFIBUS DP/
PA: Guidelines for planning and commissioning" and in the PNO Guideline.
• FOUNDATION Fieldbus
– The Endress+Hauser devices meet the requirements of the FISCO model.
– Due to the low current consumption of 15,5 mA ± 1 mA, the following number of devices can be operated
on one bus segment if installing as per FISCO:
– up to 6 Deltabar S for Ex ia, CSA IS and FM IS applications
– up to 24 Deltabar S for all other applications, e.g. in non-hazardous areas, Ex nA, etc.
Further information on FOUNDATION Fieldbus, such as requirements for bus system components can be
found in Operating Instructions BA00013S "FOUNDATION Fieldbus Overview".
Endress+Hauser 7
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