Hach TitraLab KF1000 Series User Manual page 36

Standard operations
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5. From the home screen, select the measurement application, then push Select.
6. The cell standby operation starts. The stirring speed is that specified for the
application and cannot be changed. The stability bar and the cell drift value are
shown at the bottom of the display. The stability bar shows the stability of the signal
and ranges in color from red (unstable), through yellow, to green (stable). The cell
drift value can be replaced by these messages:
Message
Excess of water
Excess of titrant
Risk of cell overflow The measurement cell is full and there is a risk of liquid spill. The
Note: These messages can be displayed under the cell drift value in the middle of the display
during the cell conditioning procedure. The stability bar or these messages are displayed at the
bottom of the display during the measurement procedure.
7. Application information also shows on the display. If necessary, select an icon for
more information or to change some data. The cell standby operation continues.
Option Description
Information Shows more information about the application.
Operator Changes the operator ID. Select from a list of applicable operators.
Sample Sample Name: Change the specified name of the sample.
Type: Push the left and right arrow keys and select the sample type (Sample,
QC or Define blank) to be used for the measurement. If Define blank has
been selected before, two more sample types are available (QC with blank
and Sample with blank).
8. Make sure that the icon at the bottom of the display
instructions that show on the display adjacent to this icon. Make sure that the tubes
and sensor are correctly aligned.
9. Push Start to start the measurement. If the cell is dry, cell conditioning is not needed
and the procedure continues at step 12. If the cell is not dry, cell conditioning starts.
Measurement data shows on the display.
10. If the default stirring speed needs to be adjusted, push the up and down arrow keys
to increase or decrease the speed.
Note: Changing the default stirring speed can effect the measurement result. Any adjustment
only applies to the current operation. The standard default stirring speed for the application is
not changed.
11. Two options are available during the cell conditioning procedure:
Option Description
Stop Aborts the measurement and no results are calculated. If selected during the
Replicate Sample option, then all data in the series is lost.
Skip Stops the cell conditioning and goes directly to the next step in the procedure.
Results are then calculated from measurement data available before Skip is
selected. Results can be less accurate using this option.
12. Weigh the sample in its container and write down the result.
13. When the cell conditioning is complete add the sample. Remove the sample stopper
and put the correct amount of sample into the beaker with an applicable utensil. Make
sure that all of the sample is put into the center of the beaker and that none of it spills
onto the walls of the beaker.
Description
The measurement cell contains too much water. Titrant continues to
be added until the cell is dry.
The measurement cell contains too much titrant. No more titrant is
added.
procedure stops.
is highlighted. Do the