Hach BioTector B7000 User Manual page 31

13. Run Reagents Purge. The RUN REAGENTS PURGE function is used to prime all reagents in the
BioTector. If necessary, the pump operation time for Reagent Purge cycle can be increased in the
Reagents Purge menu.
14. Run Zero Calibration. Each time BioTector reagents are replaced or topped up and each time a service
is carried out, it is strongly recommended to use the RUN ZERO CALIBRATION function so that the
system can set the zero offset values automatically. The zero calibration reactions operate in the same
manner as a normal reaction, but BioTector takes DI Water through the Zero Water port. To start the zero
calibration cycle, first connect Zero Water (DI Water) to the BioTector Zero Port. Press the ENTER key at
this menu item. An "*" will indicate that the function is running. At the end of the Zero Calibration cycle,
the following settings are checked and updated:
1. The TOC Zero Adjust settings for each range are updated automatically by the system using the
un-calibrated TOC measurement (not the results seen on the LCD screen). If a Zero Check is
used to check the zero offset, the suggested values are shown in brackets "[ ]" next to the actual
Zero Adjust settings.
2. The TN Zero Adjust settings for each range are updated by using the un-calibrated TN
absorbance data (not the results shown on the LCD display). If a Zero Check is used to check the
zero setting, the suggested values are shown in brackets "[]" next to the actual TN Zero Adjust
settings.
3. If the CO2 LEVEL is set as AUTO for automatic updating in the Reaction Check menu, then the
reaction check CO
4. The CO Level is also checked against the BASE CO2 ALARM setting in Fault Setup menu. If the
2
measured CO
CO2 IN BASE" warning.
15. Run Zero Check. Zero Check cycle is similar to the Zero Calibration above, but BioTector does not
update any of the Zero Adjust or CO
described above.
17. Zero Program. Zero Program function allows the user to program the number of zero reactions run at
one or more ranges (R1, R2 and/or R3) for all measured parameters. When the number of zero
calibration reactions for one or two of the ranges is set to zero, system runs the zero cycle on the
programmed range or ranges and calculates the Zero Adjust values for the other ranges automatically. It
is recommended not to modify the factory set Zero Program values unless it is absolutely necessary. Any
unnecessary modification in this setting may have an impact on the zero offset values.
18. Zero Average. Zero Average function allows the user to program the number of zero reactions to be
averaged for each range (R1, R2 and/or R3) at the end of the zero cycles for all measured parameters. It
is recommended not to modify the factory set Zero Average values unless it is absolutely necessary. Any
unnecessary modification in this setting may have an impact on the zero offset values.
20.  Zero Program. Zero Program is a link to Maintenance, System Configuration, Sequence Program,
Zero Program menu.
Level is also updated automatically.
2
Level is greater that the BASE CO2 ALARM value, system generates a "52_HIGH
2
Level settings. System only checks the BASE CO2 ALARM
2
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