Endress+Hauser Cerabar S PMC71 - Performance Characteristics - General; Reference Operating Conditions; Uncertainty of Measurement for Small Absolute Pressure Ranges; Long-Term Stability

Cerabar S
20 Endress+Hauser
Performance characteristics – general
Reference operating
conditions
• As per IEC 60770
• Ambient temperature T
U
= 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: horizontally ±1°
• Input of LOW SENSOR TRIM and HIGH SENSOR TRIM for lower range value and upper range value
• Zero based span
• Material of process isolating diaphragm PMC71: Al
2
O
3
(aluminum oxide ceramic)
• Material of process isolating diaphragm PMP71 and PMP75: AISI 316L/1.4435
• Filling oil PMP71 and PMP75: silicone oil
• Supply voltage: 24 V DC ± 3 V DC
• Load with HART: 250 Ω
Uncertainty of measurement
for small absolute pressure
ranges
The smallest extended uncertainty of measurement that can be returned by our standards is:
• 0.4% of the measured value in the range 1 to 30 mbar (0.0145 to 0.435 psi)
• 1% of the measured value in the range < 1 mbar (0.0145 psi)
Long-term stability PMC71/PMP75:
• For measuring ranges ≥ 1 bar (15 psi): ± 0.05 % of URL/year
PMC71:
• 100 mbar to 40 bar (1.5 psi to 600 psi): ±0.2 % of URL/10 years
• 100 mbar to 40 bar (1.5 psi to 600 psi) (absolute pressure sensor): ±0.3 % of URL/10 years
PMP71 gauge pressure sensors:
Influence of the installation
position
• PMC71
1
: ≤ 0.18 mbar (3 psi)
• PMP71
1, 2
– Process connections thread G 1 A, G 1 1/2, G 2, 1 1/2 MNPT, 2 MNPT, M 44x1,25, EN/DIN, ANSI
and JIS flanges: ≤ 10 mbar (0.15 psi)
– Process connections thread: G 1/2, 1/2 MNPT, JIS G 1/2, JIS R 1/2, M20x1.5: ≤ 4 mbar (0.06 psi)
Note!
Position-dependent zero shift can be corrected. → ä 25, "General installation instructions" section and
→ ä 75 ff, "Installation instructions, diaphragm seal systems" section
1 year 5 years 10 year
Measuring ranges [bar (psi)] % of URL
1 (15) ±0.020 ±0.080 ±0.180
10 (150) ±0.025 ±0.050 ±0.075
40 (600) ±0.025 ±0.075 ±0.100
100 (1500) ±0.050 ±0.150 ±0.200
400 (6000) ±0.050 -- ±1
1) Device rotated 180°, process connection pointing upwards.
2) The value is doubled for devices with inert oil.