Bronkhorst EL-FLOW Prestige - Manual (Page 10)

Bronkhorst High-Tech B.V.
EL-FLOW Prestige 9.17.084 10
distance between the angle and the instrument is recommended.
Do not mount pressure regulators directly on the inlet of gas flow meters/controllers, but allow at least 25 pipe
diameters of piping.
2.4 Instrument mounting
Install the EL-FLOW Prestige meter/controller in the line, in accordance with
the direction of the FLOW arrow. The arrow for flow direction is indicated on
the body of the instrument. Tighten the fittings according to the instructions of
the supplier of the fittings. The use of Swagelok RS-type stainless steel adapters
is recommended.
For EL-FLOW Prestige instruments the upright position is preferred. When mounting an instrument in up- or
downward position, zeroing of the instrument is advised (see section 2.9), especially at high pressures (> 10 bar).
Avoid installation in close proximity of mechanic vibration and/or heat sources.
At the bottom side of the instrument a number of mounting holes are present, for stable fixation of the instrument.
Refer to the dimensional drawing for the instrument for the exact position of the mounting holes.
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Dimensional drawings can be found at: http://www.bronkhorst.com/en/downloads
2.5 Leak check
Check the system for leaks before applying (fluid) pressure. Especially if toxic, explosive or other dangerous fluids are
used!
2.6 Electrical connection
Electrical connection must be made with standard cables or according to the applicable
hook-up diagrams. The factory installed 9-pin sub-D settings are indicated on the
instrument back-side label. Make sure that the power supply is suitable for the power
ratings as indicated on the instrument label and that double or reinforced insulation is
used for the power supply.
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Applicable hook-up diagrams for EL-FLOW Prestige can be found at:
http://www.bronkhorst.com/en/downloads
EL-FLOW Prestige instruments are powered with +15…+24 Vdc. Several
hook-up examples and standard cables are found in chapter 3.
The instruments contain electronic components that are susceptible to damage by electrostatic discharge. Proper
handling procedures must be taken during installation, removing and connecting the electronics.
The instruments described in this manual carry the CE-mark and are compliant with the EMC requirements. However
compliance with the EMC requirements is not possible without the use of proper cables and connector/gland
assemblies. Bronkhorst High-Tech B.V. recommends the use of their standard cables. These cables have the right
connectors and if loose ends are used, these will be marked to prevent wrong connection. When using other cables,
cable wire diameters should be sufficient to carry the supply current and voltage losses must be kept as low as
possible. When in doubt: contact your distributor.
When connecting the system to other devices (e.g. PLC), be sure that the integrity of the shielding is not affected. Do
not use unshielded wire terminals.