1. Set the valve switch (12) to ”recirculation.”
2. Turn the hand wheels forward 5 - 10 turns to remove air from the
mechanism.
3. Set the valve switch (12) to the normal operating position, and
hold a suitable vessel below the discharge tube outlet.
4. Turn the hand wheels forward until air bubbles have disappeared
in the discharge tube.
3. Dispense reagent by turning the hand wheels forward until the
desired value has been reached. If the hand wheels are rotated
backward accidentally, they do not engage and the dispensing
process is not affected.
Attention!
Wipe the remaining reagent drops from the discharge tube
into the vessel.
4. To start a new titration, press the ”Start” key to reset the display
to zero.
5. The display switches off automatically after approx. 5 minutes
of idle time. However, the titrated value remains stored. It will
reappear when the ”Start” or ”Pause” key are pressed, and the
titration can be continued.
6. When the titrating action is finished, set the valve switch (12)
back to ”recirculation.”
Attention!
To avoid splashing of reagent, always turn the hand wheels
using a slow and steady motion.
Note!
When the titrating is completed or interrupted, always set the
valve switch (12) to ”recirculation” to prevent the accidental
release of liquid from the discharge tube.
8.3. Titration
1. To switch on the LCD, press the start key. The titration mode
appears in the display.
2. Place a suitable collecting vessel below the discharge tube outlet.
8.4. Changing the reagent bottle
Changing the reagent bottle during a titration process:
1. Press the ”Pause” key. The titrated value remains stored in the
display.
2. Remove the instrument from the bottle as described in Chapter
9.1 (”Emptying”).
3. Mount a new bottle and prime the instrument (Chapter 8.2).
4. Press the ”Pause” key again. The ”Titration”
icon reappears in the display, and titration can be resumed,
starting with the stored value.
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