Bronkhorst®
Instruction Manual ES-FLOW™
9.17.145E
12
2
Installation
This chapter describes the steps to take in order to prepare the
ES-FLOW™
for first time use.
2.1
Functional properties
Before installing the
ES-FLOW™
, check if the functional properties match your requirements. The
ES-FLOW Brochure provides general technical specifications, specific technical data can be found
on the serial number label and in the purchase oder.
·
Flow/pressure rate(s)
·
Media to be used in the instrument
·
Upstream and downstream pressure(s)
·
Ambient temperature
·
Input and output signal
Bronkhorst® instruments are pressure tested to 1.5 times the requested pressure rating and outboard leak tested to at least
2 * 10
-9
mbar l/s Helium. The tested pressure is specified on the serial number label. If the serial number label is missing or if
the specified pressure is insufficient, the instrument must not be used and should be returned to the factory.
Before installation, make sure that the tested pressure is in accordance with the safety factor of your application. The tested
pressure must always be higher than the maximum operating pressure.
2.2
Mounting
2.2.1
Location
Gas bubbles in the liquid can lead to measurement errors. In general, the
instrument should be mounted in a pipe segment where gas bubbles
cannot accumulate. The image to the right shows the preferable
mounting locations.
For
some additional recommendations apply (see
further).
·
In general, the best location is a horizontal pipe segment or a segment where the fluid direction is upward.
·
Gas might accumulate in the horizontal segment if it is followed by a downward segment. Do not mount
the instrument in a location like this.
·
Mounting in a downward pipe segment with an open end is strongly dissuaded, especially if the pipe
diameter is 1/2" or more. Gravity might let the segment run empty; depending on the specific system
dimensions and the viscosity of the metered fluid, this effect might be stronger or weaker.
·
If the instrument is part of a closed fluid system, mounting the instrument in a downward pipe segment is
not preferable, but may be considered if other mounting locations are problematic.
To minimize the risk of gas inclusion by cavitation, the preferred location to install a control valve is downstream from the
instrument, the preferred location for a pump is upstream.
To prevent damage to the internal electronics, make sure the temperature inside the instrument housing does not get
above 60 °C. If necessary, take appropriate heat dissipation measures, especially if the instrument is operated inside an
enclosure (e.g. a control cabinet).
