Hach BioTector B7000i - Page 149

Page 149
100_ROTARY V STOP:ON
Rotary Valve stopped with its rotation
sensor on (sensor signal 1).
The sensor is faulty and it is always
showing on (sensor signal 1).
See Rotary Valve and Rotary Valve
Sensor in Section 8.1.6 Oxygen
Controller Status for details.
Go to Simulate menu, set MFC
flow to 20 l/h and check the
rotation of the Rotary Valve.
Check ROTARY VALVE SENSOR
signals (1 “on” and 0 “off”) in the
Oxygen Controller Status menu as
the valve rotates.
Replace the valve.
When the warning is cleared, the
green LED, labeled as “Stepper”
on the Oxygen Controller Board,
should be on.
101_ROTARY V STOP:OFF
Rotary Valve stopped with its rotation
sensor off (sensor signal 0).
The sensor is faulty and it is not
sensing the rotation of the pump.
Sensor in Section 8.1.6 Oxygen
Controller Status for details.
Go to Simulate menu, set MFC
flow to 20 l/h and check the
rotation of the Rotary Valve.
Check ROTARY VALVE SENSOR
signals (1 “on” and 0 “off”) in the
Oxygen Controller Status menu as
the valve rotates.
Replace the valve.
When the warning is cleared, the
green LED, labeled as “Stepper”
on the Oxygen Controller Board,
should be on.
114_I/O WARNING
System has detected changes in the
Input/Output bus extender MCP23S17
chips, which have read/write control
registers, during the periodic checks
carried out automatically.
When system detects a
discrepancy between the
requested and the read
configuration registers values,
then all devices on SPI “Serial
Peripheral Interface” bus are reset
and re-initialized automatically.
Acknowledge the warning and
inform the distributor or the
manufacturer.
128_REACTOR PURGE
WARN
System has detected irregularities in
the gas flow, which indicates a possible
blockage or restriction in the reactor,
Sample Out Valve (MV5) or associated
tubing and fittings. See Reactor Purge
Check and Reactor Purge Band
defined in Pressure/Flow Test Program
menu 8.3.4.6 Pressure/Flow Test
Program.
Various, for example, air/oxygen
supply problem, partially blocked
reactor.
Faulty/blocked Sample Out Valve.
Partially blocked tube after MFC.
Faulty MFC.
Check oxygen pressure looking at
the Oxygen Controller Status (O2-
CTRL STATUS) menu. See
Section 8.1.6 Oxygen Controller
Status for details. The pressure is
typically 400mbar (±10mbar) at 20
l/h MFC flow.
Run Flow Test (see Section
8.1.1.2 Flow Test for details).