Bronkhorst®
Instruction Manual EL-FLOW® Select
9.17.099J
14
2.4
Piping requirements
·
For reliable performance, make sure the fluid stream is uncontaminated. If necessary, use an inlet filter to ensure a
moisture, oil and particle free gas stream. Select a filter with a surface area and pore size that minimize the pressure
drop.
·
If back flow could occur, the use of a check valve is also recommended.
·
Use piping or tubing that is suitable for the operating conditions of the application (media, maximum temperature,
maximum operating pressure).
·
Do not install small diameter piping/tubing on high flow rates and avoid abrupt angles or other disturbances within a
distance of 10 times the (inside) pipe diameter from the inlet or outlet of the device.
·
Do not install pressure regulators within a distance of 25 times the (inside) pipe diameter from a controlling instrument.
2.5
Fluid connection
Install the
EL-FLOW® Select
meter/controller in the line, in accordance with the
direction of the FLOW arrow on the body of the instrument. Tighten connections
according to the instructions of the supplier of the fittings. The use of Swagelok RS-
type stainless steel adapters is recommended, in combination with Bronkhorst®
elastomer O-rings.
Check the fluid system for leaks before applying full operating pressure, especially when using hazardous media (e.g. toxic
or flammable).
2.6
Electrical connection
Electrical connections must be made with standard cables or according to the applicable hook-up diagram. The factory
installed 9-pin D-sub settings are indicated in the hook-up diagram. Make sure that the power supply is suitable for the
power ratings as indicated in the hook-up diagram and that double or reinforced insulation is used for the power supply.
EL-FLOW® Select instruments are powered with 15…24 Vdc, depending on the fieldbus system (if applicable).
To prevent damage as a result of reversed polarity, the use of a 2A fuse in the Us line is recommended.
In order to be able to comply with all applicable guidelines and regulations, it is essential that electrical connections be
made by or under supervision of a qualified electrician.
·
The equipment described in this document contains electronic components that are susceptible to
electrostatic
discharge
.
·
When working on the electrical installation, take appropriate measures to prevent damage as a result of electrostatic
discharge.
