Endress+Hauser Deltabar FMD72 - Page 120

Technical data Deltabar FMD71, FMD72
120 Endress+Hauser
15.3.6 Reference accuracy
The reference accuracy contains the non-linearity [DIN EN 61298-2 3.11] including the
pressure hysteresis [DIN EN 61298-23.13] and non-repeatability [DIN EN 61298-2 3.11]
in accordance with the limit point method as per [DIN EN 60770].
Measuring cell Sensor Reference accuracy (A)
[%URL for every sensor]
Calculated reference accuracy (A
Diff
)
of the differential pressure
Standard Platinum
100 mbar (1.5 psi) Gauge pressure A =
A =
±0.075
±0.15
1)
- Calculation (mbar, bar or psi):
A
Diff
HP HP
2
(A URL )
+=
.
LP LP
2
(A URL )
.
100 100
A0016468
Percentage calculation of URL dP:
A [%]
P
100
.
Diff
Diff
=
A
Diff
A0016469
250 mbar (3.75 psi) Gauge pressure A =
A =
±0.075
±0.15
1)
-
400 mbar (6 psi) Gauge pressure A =
A =
±0.075
±0.15
1)
-
1 bar (15 psi)
2 bar (30 psi)
4 bar (60 psi)
10 bar (150 psi)
40 bar (600 psi)
Gauge pressure/ Absolute pressure A =
A =
±0.075
±0.15
1)
A = ±0.05
±0.075
1)
1) For hygienic process connections
15.3.7 Thermal change in the zero output and the output span
Standard version
Measuring cell –10 °C (+14 °F)to ≤
+60 °C (+140 °F)
–20 to –10 °C (–4 to +14 °F)
> +60 to +125 °C (+140 to +257 °F)
Calculated thermal change (T
Diff
)
of the differential pressure
% of the set span for every sensor
100 mbar (1.5 psi)
250 mbar (4 psi)
400 mbar (6 psi)
T
total
= ±0.176 T
total
= ±0.276 Calculation (mbar, bar or psi):
T
Diff
HP HP
2
(T URL )
+=
.
LP LP
2
(T URL )
.
100 100
A0016474
Percentage calculation of URL dP:
T [%]
P
100
.
Diff
Diff
=
T
Diff
A0016475
1 bar (15 psi)
2 bar (30 psi)
4 bar (60 psi)
10 bar (150 psi)
40 bar (600 psi)
T
total
= ±0.092 T
total
= ±0.250
High temperature version and hygienic version
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
100 mbar (1.5 psi)
250 mbar (4 psi)
400 mbar (6 psi)
Gauge
pressure
T
total
= ±0.176
T
Total
= ±0.352
1)
T = ±0.75
T = ±1.25
1)
Calculation (mbar, bar or psi):
T
Diff
HP HP
2
(T URL )
+=
.
LP LP
2
(T URL )
.
100 100
A0016474
Percentage calculation of URL dP:
1 bar (15 psi)
2 bar (30 psi)
4 bar (60 psi)
10 bar (150 psi)
40 bar (600 psi)
Gauge
pressure
T
total
= ±0.092
T
total
= ±0.184
1)
T = ±0.5
T = ±0.75
1)