Measuring Accuracy Of Sitrans P Ds Iii - Siemens SITRANS P DS III Operating Instructions Manual

13.5

Measuring accuracy of SITRANS P DS III

Measuring accuracy (as per EN 60770-1) gauge pressure
Reference conditions
Measuring span ratio r (spread,
Turn-Down)
Conformity error at limit point set-
ting, including hysteresis and re-
peatability
Linear characteristic curve
•
250 mbar/25 kPa/3.6 psi
Linear characteristic curve
•
1 bar/100 kPa/14.5 psi
4 bar/400 kPa/58 psi
16 bar/1.6 MPa/232 psi
63 bar/6.3 MPa/914 psi
160 bar/16 MPa/12321 psi
Linear characteristic curve
•
400 bar/40 MPa/5802 psi
700 bar/70 MPa/10152 psi
Effect of ambient temperature
250 mbar/25 kPa/3.6 psi
•
1 bar/100 kPa/14.5 psi
•
4 bar/400 kPa/58 psi
•
16 bar/1.6 MPa/232 psi
63 bar/6.3 MPa/914 psi
160 bar/16 MPa/2321 psi
400 bar/40 MPa/5802 psi
700 bar/70 MPa/10152 psi
•
Long-term stability at ±30 °C
(±54 °F)
250 mbar/25 kPa/3.6 psi
•
1 bar/100 kPa/14.5 psi
•
4 bar/400 kPa/58 psi
SITRANS P DS III/P410 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00053276-08
Rising characteristic curve
•
Start of scale value 0 bar/kPa/psi
•
Seal diaphragm stainless steel
•
Measuring cell with silicone oil filling
•
Room temperature 25 °C (77 °F)
•
r = max. measuring span/set measuring span and nominal measuring range
r ≤ 1.25
≤ 0.065%
r ≤ 5
≤ 0.065%
r ≤ 3
≤ 0.075%
In percent per 28 °C (50 °F)
≤ (0.16 • r + 0.1) %
≤ (0.05 • r + 0.1) %
≤ (0.025 • r + 0.125) %
≤ (0.08 • r + 0.16) %
Per year ≤ (0.25 • r) %
In 5 years ≤ (0.25 • r) %
13.5 Measuring accuracy of SITRANS P DS III
3 < r ≤ 10
≤ (0.0029 • r + 0.071) % ≤ (0.005 • r + 0.05) %
Technical data
1.25 < r ≤ 30
≤ (0.008 • r + 0.055) %
5 < r ≤ 100
≤ (0.004 • r + 0.045) %
10 < r ≤ 100
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