Hach BioTector B3500s, User Manual

Page: 145 / 166

Page 145
95_LO AIR PRESSURE 1 Air pressure supply has been less than
0.8 bar for longer than 60 seconds.
When the oxygen concentrator is
running, the pressure typically cycles
from 1.5 bar to 0.9 bar. Extreme fluctuations in air supply
pressure or faulty external air
regulator.
Increase air supply pressure to
1.5 bar when the oxygen
concentrator is not running.
When the problem is rectified,
acknowledge the warning by
pressing the ENTER key in the
Fault Archive menu, to reset the
O2-Controller Board.
96_HI O2 PRESSURE 2
Oxygen pressure supply has been
more than 500 mbar for longer than 5
seconds.
If system does not detect the oxygen
pressure drop to normal levels, the air
supply is isolated from the system and
oxygen is not generated. Reduce oxygen pressure to 400
mbar (±10mbar) at 20 l/h MFC
flow, looking at the Oxygen
Controller Status (O2-CTRL
STATUS) menu and using the
oxygen pressure regulator.
When the problem is rectified,
acknowledge the warning by
pressing the ENTER key in the
Fault Archive menu, to reset the
O2-Controller Board.
97_HI O2 PRESSURE 1
Oxygen pressure supply has been
more than 450 mbar for longer than 60
seconds. Reduce oxygen pressure to 400
mbar (±10mbar) at 20 l/h MFC
flow, looking at the Oxygen
Controller Status (O2-CTRL
STATUS) menu and using the
oxygen pressure regulator.
98_LO O2 PRESSURE 2
Oxygen pressure supply has been less
than 150 mbar for longer than 5
seconds.
If system does not detect the oxygen
pressure increase to normal levels, the
air supply is isolated from the system
and oxygen is not generated. Increase oxygen pressure to 400
mbar (±10mbar) at 20 l/h MFC
flow, looking at the Oxygen
Controller Status (O2-CTRL
STATUS) menu and using the
oxygen pressure regulator.
When the problem is rectified,
acknowledge the warning by
pressing the ENTER key in the
Fault Archive menu, to reset the
O2-Controller Board.
99_LO O2 PRESSURE 1 Oxygen pressure supply has been less
than 200 mbar for longer than 60
seconds. Increase oxygen pressure to 400
mbar (±10mbar) at 20 l/h MFC
flow, looking at the Oxygen
Controller Status (O2-CTRL
STATUS) menu and using the
oxygen pressure regulator.