KROHNE ALTOSONIC V12 EN - Manual (Page 19)

INSTALLATION
3
19
ALTOSONIC V12
www.krohne.com 04/2013 - 4002643502 - MA ALTOSONIC V12 R02 en
3.4 Pre-installation requirements
3.5 Installation
3.5.1 Mounting position
Install the ultrasonic gas flowmeter in horizontal position with the flow arrow indicator on the
nameplate or on the meter body in the direction of the positive (forward) gas flow.
Make sure that the converter is on top of the flowmeter after the installation.
Check the weight of the meter. Typically the weight of the meter will be considerably more than
the same length of pipe line.
To support the meter additional supports might be needed, preferably two, one on either side of
the meter.
Always support the meter at its flanges, the weight of the meter shall never rest on the case
around the transducers and the cabling.
If supports can not be placed under the meter flanges, supports may be placed under the mating
flanges of the pipeline. If supports can only be placed under the pipeline sections upstream or
downstream of the meter, these supports shall be as close as possible to the meter. In this case
a calculation must be made to verify that the load on the pipeline will not exceed acceptable
values.
The meter should be installed in the pipe line with gaskets, nuts and bolts according to the type
and size of the flanges of the gas flowmeter. The flanges of the meter should match with the
flanges of the pipeline where the meter should be installed.
Make sure that the gaskets do not protude into the flow as this can reduce the accuracy of the
flowmeter.
INFORMATION!
The equipment is designed for safe operation under conditions according to the following
classifications:
• Pollution degree 2: this means that normally only nonconductive (dry) pollution will occur.
Temporary conductivity caused by condensation can occur.
• Protection class I: this means the equipment must be earthed.
• Humidity: <95% RH
• Ambient temperature: -40...+65
°
C / -40...+149
°
F
• Suitable for indoor and outdoor use.
• IP66 / NEMA 4X classification.
CAUTION!
The flowmeter should be protected from corrosive chemicals or gases and dust or particles
accumulation.
CAUTION!
Do not intend to perform a hydrostatic test of the installed flowmeter.
The flowmeter has been hydrostatically tested during manufacturing (see reports) and must not
be retested with the ultrasonic sensors installed. Water will protude in the sensor pockets and
remain. This will create acoustic shortcuts and possibly cause the flowmeter to start operating
in failure.