Endress+Hauser Deltabar FMD72 - Page 121

Deltabar FMD71, FMD72 Technical data
Endress+Hauser 121
Measuring cell Sensor –10 °C (+14 °F)to ≤
+60 °C (+140 °F)
>
+60 to +150 °C
(140 to +302 °F)
Calculated thermal change (T
Diff
)
of the differential pressure
% of the set span for every sensor
1 bar (15 psi)
2 bar (30 psi)
4 bar (60 psi)
10 bar (150 psi)
T [%]
P
100
.
Diff
Diff
=
T
Diff
A0016475
Absolute
pressure
T
total
= ±0.092
T
total
= ±0.184
1)
T = ±0.75
T = ±1.25
1)
40 bar (600 psi) Absolute
pressure
T
total
= ±0.092
T
total
= ±0.184
1)
T = ±0.5
T = ±0.75
1)
1) For hygienic process connections
15.3.8 Total performance
The "Total performance" specification comprises the non-linearity including hysteresis,
non-reproducibility as well as the thermal change in the zero point. All specifications apply
to the temperature range –10 to +60 °C (+14 to +140 °F).
Measuring cell % of URL for every
sensor - standard
version
% of URL for every
sensor - high-
temperature version
% of URL for every
sensor - hygienic
version
Calculated total performance (TP
Diff
)
of the differential pressure
100 mbar (1.5 psi)
250 mbar (4 psi)
400 mbar (6 psi)
TP = ±0.2 TP = ±0.46 TP = ±0.575 Calculation (mbar, bar or psi):
TP
Diff
HP HP
2
(TP URL )
+=
.
LP LP
2
(TP URL )
.
100 100
A0016470
Percentage calculation of URL dP:
TP [%]
P
100
.
Diff
Diff
=
TP
Diff
A0016471
1 bar (15 psi)
2 bar (30 psi)
4 bar (60 psi)
10 bar (150 psi)
40 bar (600 psi)
TP = ±0.15 TP = ±0.46 TP = ±0.5
The "Applicator Sizing Electronic dp" selection tool, available free of charge on the
Endress+Hauser web site (www.endress.com/applicator), enables detailed
calculations for your respective applications.
15.3.9 Long-term stability
'
Measuring ranges Sensor Standard version Calculated long-term stability (L
Diff
)
of the differential pressure
1 year 10 years
% of URL for every sensor
100 mbar (1.5 psi)
250 mbar (4 psi)
400 mbar (6 psi)
Gauge pressure L = ±0.1
L = ±0.25
1)
L = ±0.2
L = ±0.45
1)
Calculation (mbar, bar or psi):
L
Diff
HP HP
2
(L
100 100
URL )
+=
.
LP LP
2
(L URL )
.
A0016463
Percentage calculation of URL dP/year:
L [%]
P
100
.
Diff
Diff
=
L
Diff
A0016464
Absolute pressure L = ±0.3
L = ±0.55
1)