Hach BioTector B3500C, Руководство пользователя

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Check the air supply pressure. The set point pressure should be 1.5 bar. When the oxygen
concentrator is running, the pressure typically cycles from 1.5 bar to 0.9 bar. Check the O2
PRESSURE SENSOR reading looking at the O2-Controller Status menu. The pressure
should be 400 mbar (±10 mbar) at 20 l/h MFC flow. See Section
8.1.6 Oxygen Controller
Status for details.
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Using the Simulate menu (see Section 8.1.2 Simulate for details), check the operation of the
Mass Flow Controller (MFC) and confirm that the MFC is working at various flow set points.
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Check the BioTector for any gas/liquid leaks by running the PRESSURE TEST cycle using
the Process Test menu (see Section
8.1.1.1 Pressure Test for details). Check the gas flow
in the system by running the EXHAUST TEST and SAMPLE OUT TEST in Process Test,
Flow Test menu (see Section
8.1.1.2 Flow Test for details).
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Confirm all signals (4-20mA and volt free contacts) are signaling correctly to the external
control device.
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If necessary, go to Operation, Time & Date menu and adjust the time and the date. When the
system service is completed, go to Diagnostics, Service menu and select RESET SERVICE
COUNTER function (see Section
8.1.7 Service for details).
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Carry out an “Install New Reagents” cycle using the Install New Reagents menu (see Section
2.2.2.1 Install New Reagents for details). Confirm that the zero readings obtained
during the Zero Calibration cycle are stable.
( If the reagent lines do not fill during the Install New Reagents cycle, stop the BioTector to prime the
pumps manually. Remove the dip tubes from the reagent containers, and seal the containers. Place the
dip tubes into a small container containing DIW. If DIW is not available use tap water. Raise the
container above the height of the BioTector. Go to Zero Calibration menu and select RUN REAGENTS
PURGE function to prime the pumps. Once the pumps have been primed, reinstall the dip tubes into
the reagent containers and repeat the Install New Reagents cycle.)
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When the Mixer Reactor is serviced, there is a possibility of contamination, which may create
an unacceptable TOC offset. If the TOC readings obtained during the zero calibration cycle
are higher than expected, a service zero calibration cycle can be initiated using the SET
SERVICE ZERO function in Service menu, while the BioTector is running. When initiated,
BioTector automatically runs a total of 5 zero calibration cycles during the following 100
online measurements and automatically adjusts the zero offset values to compensate for the
removal of the contamination. It will therefore not be necessary to revisit the BioTector after
the service or to repeat the zero calibration cycle. See Section
8.1.7 Service for further
details.
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Program the concentration of the available standard solution in the Span Calibration menu.
(See procedures described in Section 6.2 Calibration Standards to prepare a standard solution and see
Section 2.3.2 Span Calibration for details.)
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Connect the standard solution to the MANUAL/CALIBRATION port. If these ports are not
available, use the SAMPLE 1 port. It is recommended that the standard solution is located at
the same height as the sample chamber. The tubing length between the standard solution
and the BioTector MANUAL/CALIBRATION port should be between 2 and 2.5 meters. Run
the Span Calibration cycle using the RUN SPAN CALIBRATION function in Span Calibration
menu. A minimum of five complete analysis cycles is recommended for the span calibration.
In systems using multiple operation ranges, it is recommended to carry out a Span Check
cycle at each operation range and if necessary to adjust the span factor manually using the
Span Calibration menu. Span Calibration cycle should be carried out only when stable zero
readings are obtained after a Zero Calibration cycle completed without any warnings.
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