Endress+Hauser Deltabar S FMD 77 - Performance Characteristics - General; Reference Operating Conditions; Long-Term Stability; Influence of the Installation Position

Deltabar S
Endress+Hauser 17
Performance characteristics – general
Reference operating conditions • As per IEC 60770
• Ambient temperature T
U
= constant, in the range of: +69.8 to +91.4°F (+21 to +33°C)
• Humidity ϕ = constant, in the range of: 45 to 75 % r.H
• Ambient pressure p
U
= constant, in the range of: 12 to 15 psi (860 to 1060 mbar)
• Position of the measuring cell: constant, in the range of: ±1°
• Input of LOW SENSOR TRIM and HIGH SENSOR TRIM for lower range value and upper range value
• Zero based span
• Membrane material PMD 75, FMD 77, FMD 78: AISI 316L
• Membrane material PMD 70, FMD 76: Al
2
O
3
(Aluminum oxide ceramic)
• Filling oil: silicone oil
Long-term stability Measuring cells ≥ 200 inH
2
O (500 mbar):
• ±0.05% of URL/year
• ±0.125% of URL/5 years
Measuring cells ≤ 40 inH
2
O (100 mbar):
• ±0.18% of URL/year
Influence of the installation
position
Position-dependent zero shift can be corrected. → See also page 21, section "General installation instructions"
and page 50 ff, section "Installation instructions, Diaphragm seal systems".
Vibration effects PMD 70, PMD 75: ≤ Reference accuracy to 15 to 25 Hz: 1.6 mm; 25 to 1000 Hz: 4g
Performance characteristics – metallic diaphragms
Reference accuracy –
PMD 75, FMD 77, FMD 78
The reference accuracy comprises the non-linearity including hysteresis and non-reproducibility in accordance
with the limit point method as per IEC 60770.
PMD 75
4 inH
2
O (10 mbar), 12 inH
2
O (30 mbar) measuring cells:
• TD 1:1: ±0.15% of URV
• TD > 1:1: ±0.15% of URV x TD
40 in H
2
O (100 mbar) measuring cell:
• TD 1:1 to TD 4:1: ±0.075% [±0.05%] of URV
• TD > 4:1: ±(0.012 • TD + 0.027)% of URV
Measuring cells ≥ 200 inH
2
O (500 mbar):
• TD 1:1 to TD 15:1: ±0.075% [±0.05%] of URV
• TD > 15:1: ±(0.0015 • TD + 0.05252)% of URV
FMD 77, FMD 78
40 in H
2
O (100 mbar) measuring cell:
• TD 1:1 to TD 4:1: ±0.075% of URV + influence from the diaphragm seal
• TD > 4:1: ±(0.012 • TD + 0.027)% of URV + influence from the diaphragm seal
Measuring cells ≥ 200 inH
2
O (500 mbar):
• TD 1:1 bis TD 15:1: ±0.075% of URV + influence from the diaphragm seal
• TD > 15:1: ±(0.0015 • TD + 0.05252)% of URV + influence from the diaphragm seal
– Values in brackets [ ] for devices with improved reference accuracy (PLATINUM version)
– The following applies for the root-extracting characteristic curve:
The accuracy data of the Deltabar S is taken into the accuracy calculation of the flow rate with a factor of 0.5.