Endress+Hauser Deltabar FMD72 - Page 126

Technical data Deltabar FMD71, FMD72
126 Endress+Hauser
15.4.8 Total performance
The "Total performance" specification comprises the non-linearity including hysteresis,
non-reproducibility as well as the thermal change of 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 Calculated total performance (TP
Diff
) of the differential pressure
400 mbar (6 psi) TP = ±0.25
TP = ±0.34
1)
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 = ±0.25
1)
1) For hygienic process connections
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.
15.4.9 Long-term stability
'
1 year 5 years 10 years Calculated long-term stability (L
Diff
)
of the differential pressure
Measuring ranges % of URL for every sensor
400 mbar (6 psi) L = ±0.035
L = ±0.25
1)
L = ±0.14 L = ±0.32 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
1 bar (15 psi) L = ±0.020
L = ±0.1
1)
L = ±0.08 L = ±0.180
2 bar (30 psi)
4 bar (60 psi)
10 bar (150 psi)
L = ±0.025
L = ±0.1
1)
L = ±0.05 L = ±0.075
40 bar (600 psi) L = ±0.025
L = ±0.1
1)
L = ±0.075 L = ±0.100
1) For hygienic process connections