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Installation position
Rotations in the plane of the diaphragm have a negligible effect. A tilt
from the vertical causes a zero shift of sin a x 0.35 kPa (3.5 mbar, 1.4
in H
O) of the upper range limit, which can be corrected using an
2
appropriate zero position adjustment. There is no effect on the span.
Long-term stability
Sensor code C ... R:
± (0.05 x TD) % / year
± (0.15 x TD) % / 5 years
Sensor code A:
± (0.2 x TD) % / year
± (0.3 x TD) % / 5 years
Vibration effect
± 0.10 % of upper range limit (according to IEC 61298-3)
Base accuracy (Total performance)
Temperature change in the range -10 ... 60 °C (14 ... 140 °F), up to
10 MPa, 100 bar, 1,450 psi static pressure (sensors C ... R):
± 0.13 % of the set span (TD 1:1)
The base accuracy (Total performance) includes the measuring error
(non-linearity including hysteresis and non-reproducibility), the
thermal change in the ambient temperature on the zero signal and
span, as well as the effect of the static pressure on the zero signal
and span.
2
=
+
+
E
(
E
E
)
E
ϑ
ϑ
perf
Δ
1
Δ
2
Pstat1
E
= Base accuracy
perf
E
= Effect of the ambient temperature on the zero signal
ϑ
Δ
1
E
= Effect of the ambient temperature on the span
ϑ
Δ
2
E
= Effect of the static pressure on the zero signal
Pstat1
E
= Effect of the static pressure on the span
Pstat2
E
= Measuring error (for terminal-based conformity)
lin
Change from one to two columns
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IM/265D/V-EN-02
2
2
2
+
+
E
E
Pstat2
lin
Pos: 23.51 /Technische Daten / Datenblatt/Druck/Druckmessumformer/265Dx, 265Vx/Betriebseinflüsse 265Vx @ 17\mod_1201165220734_3101.doc @ 153973
10.6.2 Operating influences 265Vx
Thermal change in ambient temperature on the zero signal and
span (turndown up to 15:1), in relation to the set span
Range
-10 ... 60 °C
(14 ... 140 °F)
-40 ... -10 °C
(-40 ... 14 °F)
and
60 ... 80 °C
(140 ... 176 °F)
Power supply
Within the specified limits for the voltage/load, the total effect is less
than 0.001 % of the upper range limit per volt.
Load
Within the specified load/voltage limits, the total effect is negligible.
Electromagnetic fields
Total effect: Less than 0.05 % of span between 80 and 1,000 MHz
and at field strengths of up to 10 V/m, when tested with unshielded
cables, and either with or without a display.
Installation position
Rotations in the plane of the diaphragm have a negligible effect.
A tilt from the vertical causes a zero shift of sin α x 0.35 kPa (3.5
mbar, 1.4 in H
O) of the upper range limit, which can be corrected
2
using an appropriate zero position adjustment. There is no effect on
the span.
Long-term stability
± (0.05 x TD) % / year
± (0.15 x TD) % / 5 years
Vibration effect
± (0.10 x TD) % acc. to IEC 61298-3.
Base accuracy (total performance)
Temperature change in the range -10 ... 60 °C (14 ... 140 °F):
± 0.2 % of the set span (TD 1:1)
The base accuracy (Total performance) includes the measuring error
(non-linearity including hysteresis and non-reproducibility), as well as
the thermal change in the ambient temperature on the zero signal
and span.
(
=
+
E
E
Δ
ϑ
perf
1
E
= Base accuracy
per
f
E
= Effect of the ambient temperature on the zero signal
Δ
ϑ
1
Δ
ϑ
E
2
= Effect of the ambient temperature on the span
E
= Measuring error (for terminal-based conformity)
lin
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265Dx, 265VS
Technical data
Maximum effect on zero signal and span
± (0.1 % x TD + 0.1 %)
± (0.05 % / 10 K x TD + 0.05 % / 10 K)
)
2
2
+
E
E
Δ
ϑ
2
lin
73
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