KROHNE ALTOSONIC III EN - Manual (Page 6)

ALTOSONIC III 6
2. Mechanical
Installation
2.1 Handling the
flowmeter
Important: Do not lift the flowmeter by the signal converter housing or the
terminal box. Check the weight of the flowmeter as indicated on the type
plate before handling the unit. When handling the flowmeter avoid hard
blows, jolts or impacts.
Do not place the flowmeter on the signal converter housing.
2.2 Installation location
and position
As the ALTOSONIC III is used in hydrocarbon pipelines, be aware of
potentially explosive atmospheres. Local standards and regulations must be
respected.
The flow sensor must be completely filled at all times for proper flow
measurement. Non-wetted sensors show loss of signal. There is no damage
when this occurs.
The sensor must be installed in a horizontal or vertical position. A correct
position of the unit guarantees a completely filled flow sensor and accurate
flow measurement.
Inlet and outlet sections
For functioning within stated accuracy the flow sensor has to be installed with specified inlet flow conditioner and outlet
sections. The flow conditioner is delivered as a part of the flowmeter as the flow sensor and flow conditioner are calibrated
together for optimal performance.
Inlet configurations (upstream): Straight inlet section, length 10 D with ISO tube bundle flow conditioner.
Outlet configuration (downstream): Straight outlet section, length 5 D.
D = nominal diameter of the flow sensor.
It is advised to keep length of 5 D straight pipe section upstream between flow conditioner and upstream disturbances.
Bush guides
Every ALTOSONIC III is calibrated in combination with a dedicated inlet flow
conditioner. To minimize the installation effects on the performance of the
ALTOSONIC III a provision is made to assure that the flow conditioner
versus the ALTOSONIC III have the same position at operation as during the
initial calibration.