Endress+Hauser Deltapilot M FMB51 - Performance Characteristics; Reference Operating Conditions; Long-Term Stability; Influence of Orientation

Deltapilot M FMB50/51/52/53
Endress+Hauser 21
Performance characteristics
Reference operating
conditions
• As per IEC 60770
• Ambient temperature T
A
= constant, in the range of: +21 to +33°C (+70 to 91 °F)
• Humidity ϕ = constant, in the range of: 5 to 80 % RH
• Ambient pressure p
A
= constant, in the range of: 860 to 1060 mbar (12.47 to 15.37 psi)
• Position of the measuring cell: constant, in range:
FMB50: horizontally ±1°
FMB51/FMB52/FMB53: vertically ±1°
• Input of LOW SENSOR TRIM and HIGH SENSOR TRIM for lower range value and upper range value
• Span based on zero point
• Material of the process isolating diaphragm: Alloy C276 (2.4819) and Alloy C276 (2.4819) with coating
(AuRh or AuPt)
• Measuring cell material (meter body): Alloy C276 (2.4819), 316L (1.4435)
• Filling oil: synthetic oil (FDA)/inert oil
• Supply voltage: 24 V DC ± 3 V DC
• Load with HART: 250 Ω
Long-term stability
Influence of orientation • < 2.3 mbar (0.0345 psi) when using synthetic oil (FDA)
• < 5 mbar (0.075 psi) when using inert oil
Note!
Position-dependent zero point shift can be corrected. → ä 23, "General installation instructions" section.
Warm-up period • 4 to 20 mA HART:
– FMB50 = ≤5 s
– FMB51/FMB52/FMB53 = ≤8 s
• PROFIBUS PA: ≤8 s
• FOUNDATION Fieldbus: ≤20 s (after a TOTAL-reset ≤45 s)
Calibration position
Reference accuracy The reference accuracy comprises the non-linearity according to limit point setting, hysteresis and non-
reproducibility as per IEC 60770. The data refer to the calibrated span.
Measuring cell Long-term stability [%]
0.1 bar (1,5 psi)
• < 0.18 of the upper range limit (URL) / year
• < 0.45 of the upper range limit (URL) / 5 years
0.4 bar (6 psi)
1.2 bar (18 psi)
• < 0.1 of the upper range limit (URL) / year
• < 0.25 of the upper range limit (URL) / 5 years
4 bar (60 psi)
10 bar (150 psi)
• < 0.05 of the upper range limit (URL) / year
• < 0.125 of the upper range limit (URL) / 5 years
➀ FMB50
➁ FMB51, FMB52, FMB53
To minimize the effect of
the orientation (e.g. in the
case of vertical device
installation), position offset
is preset at the factory.
P01-FMB5xxxx-11-xx-xx-xx-001
➀
➁
Reference accuracy in % of the calibrated span
Measuring cell TD "Standard" option "Platinum" option
0.1 bar (1.5 psi)
•TD ≤ 2:1
•TD > 2:1
•< 0.2
• < 0.1 x TD
• < 0.15
• < 0.075 x TD