Endress+Hauser Deltabar FMD72 - Page 125

Deltabar FMD71, FMD72 Technical data
Endress+Hauser 125
15.4.6 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
400 mbar (6 psi) Gauge pressure A = ±0.15
±0.3
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
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 =
A =
±0.05
±0.075
1)
1) For hygienic process connections
15.4.7 Thermal change of the zero output and the output span
'
'
Measuring cell –10 to +60 °C (+14 to +140 °F) –40 to –10 °C (–40 to +14 °F)
+60 to +80 °C (+140 to +176 °F)
Calculated thermal change (T
Diff
)
of the differential pressure
% of the set span for every sensor
400 mbar (6 psi) T
total
= ±0.215
T
span
= ±0.2
T
zero point
= ±0.015
T
total
= ±0.43
T
span
= ±0.4
T
zero point
= ±0.03
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
= ±0.101
T
span
= ±0.1
T
zero point
= ±0.01
T
total
= ±0.42
T
span
= ±0.4
T
zero point
= ±0.02