Endress+Hauser Proline Promass A 100 PROFINET Operating Instructions Manual page 140

Technical data
Influence of medium
pressure
Influence of process density
Design fundamentals
140
3
[kg/m ]
10
8
6
4
2
0
-50
-80 -40 0
1 Field density adjustment, for example at +20 °C (+68 °F)
2 Special density calibration
Temperature
±0.005 · T °C (± 0.005 · (T – 32) °F)
A difference between the calibration pressure and process pressure does not affect
accuracy.
If there is a difference in density between the calibration density and the process density,
the measurement error for the measured density is typically:
• ±0.6% for nominal diameter DN 4 (¹⁄₂₄ in)
• ±1.4% for nominal diameter DN 2 (¹⁄₁₂ in)
• ±2.0% for nominal diameter DN 1 (¹⁄₁₂ in) and for devices with order code for "Measuring
tube material, wetted surface:", option HB "Alloy C22, high pressure, not polished"
A field density adjustment is possible.
o.r. = of reading, o.f.s. = of full scale value
BaseAccu = base accuracy in % o.r., BaseRepeat = base repeatability in % o.r.
MeasValue = measured value; ZeroPoint = zero point stability
Calculation of the maximum measured error as a function of the flow rate
Flow rate
ZeroPoint
⋅
100
³
BaseAccu
ZeroPoint
⋅
< 100
BaseAccu
Calculation of the maximum repeatability as a function of the flow rate
Flow rate
⋅
½ ZeroPoint
⋅
100
³
BaseRepeat
⋅
½ ZeroPoint
⋅
< 100
BaseRepeat
1
0 50 100
40 80 120 160 200 240 280 320 360 400
Maximum measured error in % o.r.
± BaseAccu
A0021332
ZeroPoint
⋅
±
100
MeasValue
A0021333
Maximum repeatability in % o.r.
A0021335
ZeroPoint
⋅ ⋅
± ½ 100
MeasValue
A0021336
Proline Promass A 100 PROFINET
2
[°C]
150 200
[°F]
Endress+Hauser
A0016616
A0021339
A0021334
A0021340
A0021337