Endress+Hauser Prosonic S FMU95, Руководство по эксплуатации

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Technical Data Prosonic S FMU95
94 E Hauser
10.1.4 Performance characteristics
Reference operating
conditions • Temperature = 24±5 °C (75±9 °F)
• Pressure = 960±100 mbar (14±1.45 psi)
• Relative humidity = 60±15 %
• Ideally reflecting surface, sensor vertically aligned
(e.g. calm, plane liquid surface of 1 m
2
(10.76 ft
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
7)
±0.2 % of the maximum span of the sensor
Typical accuracy
8)
±2 mm (0.08 in) + 0.17 % of the measured distance
Measured value resolution 1 mm (0.04 in) with FDU90/FDU91
Measuring frequency • 0.2 Hz (with 5 sensors)
• 0.1 Hz (with 10 sensors)
The exact value depends on the settings of the application parameters and the instrument version
(5 sensors or 10 sensors).
!
Note!
If unused sensor inputs are switched off (in the "sensor management" menu), the measuring
frequency increases. The Prosonic S measures with one sensor per second.
Influence of the vapor pressure The vapor pressure at 20 °C (68 °F) gives a hint on the accuracy of the ultrasonic level
measurement. If the vapor pressure at 20 °C (68 °F) is below 50 mbar (1 psi), ultrasonic level
measurement is possible with a very high accuracy. This is valid for water, aqueous solutions, water-
solid-solutions, dilute acids (hydrochloric acid, sulfuric acid, ...), dilute bases (caustic soda, ...), oils,
greases, slurries, pastes, ...
High vapor pressures or outgassing media (ethanol, acetone, ammonia, ...) can influence the
accuracy. If conditions like these are present, please contact your Hauser sales
representative.
10.1.5 Ambient conditions
Ambient temperature -40 to 60 °C (-40 to 140 °F)
The functionality of the LC display becomes restricted at T
U
< -20 °C ( T
U
< -4 °F).
If the device is operated outdoors in strong sunlight, a protective cover should be used (

ä
88,
"Accessories").
Storage temperature -40 to 60 °C (-40 to 140 °F)
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)
7) according to NAMUR EN 61298-2
8) after calibration