Bronkhorst FLOW-SMS Series - Manual (Page 6)

BRONKHORST HIGH-TECH B.V.
2 Starting up
2.1 Check properties
9.17.057 page 6
Before installing a FLOW‐SMS system it is important to
read the attached labels and check:
‐ Flow rates / Pressure rate(s)
‐ Fluids to be measured
‐ Up‐ and downstream pressures
‐ Input/output signal
‐ Temperature
input/output
A – 0…5 Vdc
B – 0…10 Vdc
F – 0…20 mA
G – 4…20 mA
Check if the sealing material like O‐rings, plunger and packing gland of capillary are suitable for the
used gas and process. The Flow module is fitted with Viton, EPDM or Kalrez seals. Which sealing
material is used is shown in the last character of the model key. The rest of FLOW‐SMS system also
contains sealings, which are selected based on the fluid flow schematic diagram.
2.2 Rated pressure test inspection
Each FLOW‐SMS system is pressure tested to at least 1.5 times
the working pressure of the process conditions stipulated by the customer,
with a minimum of 8 bar.
Pressure Testing Sticker
Each instrument is helium leak tested to at least 210‐9 mbar l/s Helium
outboard.
2.3 Check piping
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: 7 µm.
If back flow can occur, a downstream filter and a check valve are
recommended too.
For particle filtering the FLOW‐SMS program offers sintered filter modules
with porosities 0.5, 2, 7, and 15 micron
The tested pressure is stated on the instrument with a RED COLOURED sticker. Before installation,
make sure that the test pressure is in accordance with normal safety factors for your application.
If there is no Pressure Testing Sticker on the device or if the test pressure is incorrect, the instrument
should not be mounted in the process line and be returned to the factory.