Hach TitraLab KF1000 Série Manuel D'utilisation Simplifié page 21

Personal injury hazard. Never use the instrument without the syringe protection cover in place.
Chemical exposure hazard. Never remove the stir bar from the beaker before the end of a titration.
7.1 Calibration
7.1.1 Calibrate the titrant
1. Make sure that the glass beaker, the sensor holder and all related parts are clean and dry. Put a
magnetic stir bar into the beaker.
2. Attach the beaker to the sensor holder. Make sure that the beaker fits tightly into the sensor
holder.
3. Read the related "Application Note" from the USB applications key for more instructions.
4. Fill the beaker with the applicable amount of solvent. Refer to the application note and
management on page 26 to adapt the volume where applicable. Make sure that there is no
liquid spill. Make sure that the initial level is enough so that the sensor is correctly installed in the
sample. Do not put too much solvent in the beaker.
5. From the home screen, select Calibration.
6. If more than one application contains a titrant calibration method, push the up and down arrow
keys to highlight the application to use, then push Select.
7. Calibration information shows on the display. If necessary, select an icon for more information or
to change some data.
Option Description
Information Shows more information about the calibration.
Operator Changes the operator ID. Select from a list of applicable operators.
8. Make sure that the icon at the bottom of the display
show on the display adjacent to this icon. Make sure that the tubes and sensor are correctly
aligned.
9. Push Start to start the calibration. Calibration 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: This adjustment only applies to the current operation. The standard default stirring speed for the
application is not changed.
11. The cell drift threshold, stability bar, sample temperature and measurement duration 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 is shown in the middle of
the display. These messages can be displayed under the cell drift value:
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: The stability bar or these messages are displayed at the bottom of the display during the calibration
procedure.
C A U T I O N
C A U T I O N
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 instructions that
Cell
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