Bronkhorst®
Instruction Manual ES-FLOW™
9.17.116B
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 product label and in the ordering details.
·
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 product label. If the product 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
Location
The presence of gas bubbles in the liquid can lead to measuring 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.
·
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 fluidic system, mounting the instrument in a downward pipe segment is
not preferable, but may be considered if other mounting locations are more 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.
Orientation
The
ES-FLOW™
has no preferred mounting orientation. However, take into account that the
connection between the measuring tube and the instrument housing is fixed. The display
cannot be turned to get a better view, it can only be adjusted by repositioning the entire
instrument.
