Bronkhorst EL-FLOW Prestige Quick Start User Manual

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2c. Environmental ratings

EL-FLOW Prestige instruments are suitable for use in conditions between -10...70 °C and relative humidity of

10...90 %RH, unless specified otherwise. Please note that EL-FLOW Prestige instruments have an ingress protection

rating of IP-40, implying that the electronics housing and electrical connection do not offer any protection against

moist environments.

3. Check if system piping is clean

For reliable measurement always make sure the fluid stream is clean.

Use filters to assure a moisture-, oil- and particle-free gas stream.

Recommended pore size: 5 µm. If back flow can occur, a downstream

filter and a check valve are recommended too. For high flow rates select

a suitable filter size, to avoid too high pressure drop.

4. Mount/install instrument properly

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.

Avoid installation in close proximity of mechanic vibration and/or heat sources.

5. Leak check

Check the system for leaks before applying (fluid) pressure. Especially if toxic, explosive or other dangerous fluids

are used!

6. Electrical connection

Electrical connections must be made with a standard cable or according to

the EL-FLOW Prestige hook-up diagram. The factory installed 9-pin sub-D

settings are indicated on the instrument label. Make sure that the

power supply is suitable for the indicated power ratings, indicated on the

instrument label, and that double or reinforced insulation is used for the

power supply. For a more detailed hook-up diagram see the different

variations under 'SCOPE OF THIS GUIDE'.

7a. Analog / Local operation

Connect the EL-FLOW Prestige to the power supply/readout unit using a

cable with 9-pin sub-D connector.

7b. Digital RS232 operation

Digital operation over RS232 can be established when using

the following setup. Connecting the instrument with a RS232

cable or an RS232 cable with a USB to RS232 converter to a PC

will allow you to use (free) Bronkhorst® software for Windows,

such as FlowDDE and FlowPlot. Make sure that the instrument

back-side label indicates RS232 settings and apply the proper

Baud rate settings. If the instrument is not set for RS232

communication, please refer to the Instruction Manual EL-

FLOW Prestige series (9.17.084) for switching to RS232

communication settings.