Endress+Hauser Prosonic S FMU90 - Performance Characteristics; Reference Operating Conditions; Measuring Uncertainty; Typical Accuracy

Prosonic S FMU90
20 Endress + Hauser
Performance characteristics
Reference operating
conditions
• Temperature = 24±5 °C
• Pressure = 960±100 mbar
• Relative humidity = 60±15 %
• Ideally reflecting surface, sensor vertically aligned
(e.g. calm, plane liquid surface of 1 m
2
)
• No interference echoes within the signal beam
• Settings of the application parameters:
– tank shape = flat ceiling
– medium property = liquid
– process condition = calm surface
Measuring uncertainty
5)
±0,2 % of the maximum span of the sensor
Typical accuracy
6)
±2 mm + 0,17 % of the measured distance
Measured value resolution 1mm with FDU91
Measuring frequency max. 3 Hz
The exact value depends on the settings of the application parameters and the instrument version.
!
Note!
The maximum measuring frequency is obtained for "empty E" ≤ 2 m and "process condition" = "test: no filter".
Ambient conditions
Ambient temperature -40 ... 60 °C
The functionality of the LC display becomes restricted at T
U
< -20 °C.
If the device is operated outdoors in strong sunlight, a protective cover should be used (s. chapter
"Accessories").
Storage temperature -40 ... 60 °C
Climate class • Field housing: according to DIN EN 60721-3 4K2/4K5/4K6/4Z2/4Z5/4C3/4S4/4M2
(DIN 60721-3 4K2 corresponds to DIN 60654-1 D1)
• Housing for DIN rail mounting: according to
DIN EN 60721-3 3K3/3Z2/3Z5/3B1/3C2/3S3/3M1
(DIN 60721-3 3K3 corresponds to DIN 60654-1 B2)
Vibration resistance • Housing for DIN rail: DIN EN 600068-2-64 / IEC 68-2-64; 20 ... 2000 Hz; 0,5 (m/s
2
)
2
/Hz
• Field housing: DIN EN 600068-2-64 / IEC 68-2-64; 20 ... 2000 Hz; 1,0 (m/s
2
)
2
/Hz
Ingress protection • Field housing: IP66 / NEMA 4x
• Housing for DIN rail: IP20
• separate display:
– IP65 / NEMA 4 (front panel , if mounted in cabinet door)
– IP20 (rear panel, if mounted in cabinet door)
Electromagnetic compatibility
(EMC)
• Interference emmission to EN 61326; Equipment class A
• Interference immunity to EN 61326; Annex A (Industrial) and NAMUR recommendation EMC (NE21)
5) according to NAMUR EN 61298-2
6) after calibration