Hach BioTector B7000 User Manual page 152

Check the BioTector for any gas/liquid leaks by running the PRESSURE TEST
cycle using the Process Test menu. Note that the BioTector should be
pressure tested at 350 mbar pressure only.
Confirm all signals (4-20mA and volt free contacts) are signaling correctly to
the external control device.
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.
Carry out an "Install New Reagents" cycle using the Install New Reagents
menu. Confirm that the zero readings of all measured parameters obtained
during the Zero Calibration cycle are stable.
If BioTector Circulation Pump 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.
Program the concentration of the standard solution in the Span Calibration
menu (see Section 2.2 Calibration Menu). The concentration of the calibration
standard used must be typically greater than 50% of the full scale of the
RANGE the calibration is carried out. In order to see BioTector calibrated
ranges, see System Range Data screen.
procedures described in Section 6.2 Calibration Standards or information sheet "R009.
Standard Solutions for BioTector Multi-component Analyzer".)
Connect the standard solution to the MANUAL/CALIBRATION port. If these
ports are not available, use the SAMPLE 1 port. Avoid the manual purging of
the calibration, manual grab sample and sample lines using the Simulate
menu, because the system reactor may get contaminated during the automatic
sample valve and pump synchronization process. To purge these lines, it is
recommended to use PUMP FORWARD TEST and PUMP REVERSE TEST
functions in the Sample Pump Test menu. It is recommended that the standard
solution is located at the same height as the sample pump. 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. Span Calibration cycle should be
carried out only when stable zero readings are obtained after a Zero
Calibration cycle completed without any warnings. (
operation ranges, it is recommended to carry out a Span Check cycle at the other
operation ranges used and if necessary to adjust the span factor manually using the
)
Span Calibration menu.
(To prepare a standard solution, see
In systems using multiple
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