Purge Reagents & Zero; System Range Data - Hach BioTector B7000 User Manual

To run the Install New Reagents cycle, the BioTector must be stopped. Confirm that all or the corresponding
new reagents have been installed on the BioTector, for instance for acid reagent, select New Acid Connected,
and press the ENTER key. A tick mark will appear as confirmation that the new acid has been connected.
Note that when one or more reagent volumes are updated in Reagents Monitor menu, system automatically
resets the new reagents volumes in this menu and also updates the figures displayed in the main Reagents
Status screen.
All reagents volumes can be reset while system is running. This function allows the user to top up the
reagents, preferably HCl Water (if installed in systems built with FMI Heavy Duty Circulation Pump), TN
Cleaning Solution and DI Water, without stopping the system. However, when Acid and/or Base are replaced
or topped up, system requires a new Zero Calibration cycle. A "ZERO CALIBRATION REQUIRED" warning
will be displayed on the screen when RESET ACID MONITOR and/or RESET BASE MONITOR are selected.
Therefore, it is strongly recommended to stop the BioTector and activate the Start New Reagent Cycle or to
run the Zero Calibration cycle using the Zero Calibration menu. It is important that Zero Water (DI Water) is
connected to BioTector's Zero Water port before the Install New Reagent cycle is started. Unlike BioTector
TOC analyzers, in BioTector TOC TN analyzers, Zero Water is required so that the correct zero offset (Zero
Adjust) values are set for TN analysis. Failure to do so may have an impact on system zero response and the
analysis results.
When all or the necessary reagents have been confirmed to be connected and reset in this menu, and when
Start New Reagent Cycle is selected, the Install New Reagents cycle will be executed. It is the responsibility
of the user to make sure that all reagent volumes are programmed correctly in Reagents Monitor menu, the
reset of the reagents monitoring are carried out correctly in Install New Reagents menu and finally if
necessary the Zero Calibration cycle is activated either with the Start New Reagent Cycle function in Install
New Reagents menu or with the Run Zero Calibration function in Zero Calibration menu.
The Install New Reagents cycle consists of the following steps:
1. Reagent Purge: System purges and fills all reagent lines with the new reagents.
2. Zero Calibration: The Zero Adjust (zero offset) level is set for all analysis ranges, and the Reaction
Check level for TOC is updated (if the CO2 LEVEL is programmed as AUTO in Reaction Check
menu).
3. If Span Calibration or Span Check is activated in New Reagents Program menu, a Span Calibration
or Span Check is carried out.
Once the procedure is completed the BioTector either stops or returns online, depending on the programmed
setting of AUTOMATIC RE-START in New Reagents Program menu.
Purge Reagents & Zero
The Purge Reagents & Zero function is an automatic procedure to purge the reagents, to set the zero offset
and to set the reaction check levels in the BioTector. The program settings for the Reagent Purge are set up
in the Reagents Purge menu.
1. Purge Reagents & Zero. This option allows the user to run the Purge Reagents & Zero cycle.

System Range Data

This menu displays the system specific analysis range data for all measured components (e.g. TIC, TOC, TN,
etc.). BioTector can be calibrated with up to 3 analysis ranges for each measured component. When a
specific component of a sample (e.g. TOC) is measured at a specific range (e.g. Range 2), the analysis of
any other components (e.g. TN etc.) of the sample are also carried out at the same analysis range.
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