Gerhardt Vapodest 50s carousel - Rinse Micro Dosing Pump; Run Rinsing Process

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Vapodest 50s carousel
Electrode
in Buffer pH4
Clean the electrode again with water and dry carefully, then immerse it into the
buffer solution pH 4. Press key "Continue" or the Vapodest-Function button, to
continue measuring. The tension measured and the 30s stabilisation time counted
backwards are displayed. As soon as a measurement is stable for 2s, the calib-
ration is terminated.
The data obtained after the calibration can be accepted by pressing key "Accept
" and if wanted also printed out. There is the possibility to repeat the calibration
by pressing key "Calibration" without storing the values.
7.7. Rinse micro dosing pump
The rinsing program cleans the micro dosing pump and the inlet tubings. Please
note, that if air is in the inlet tubing, the results can be falsied. Thus, check the
inlet tubings regularly to see whether air bulbs are present.
The following situations make a rinsing necessary:
- When the titration liquid is exchanged
- There is air in the inlet tubing
- When the instrument is taken into operation for the rst time
- The instrument has not been used for a while
7.7.1. Run rinsing process
From the menu bar select System > Titrator > Rinsing micro dosing pump to
open the following window.
In such a case, enter the rinsing volume. In most cases a rinsing volume of about
10 – 15 ml is sufcient. The dosing pump delivers theoretically 0.05 ml per turn.
Minor deviations are possible. These are balanced off by a calibration done by the
manufacturer (also see chap. 7.9.3. Titration calibrate dosing pump.
The rinsing process is started by pressing key "Start".
Below the insert window the number of the turns of the pump head is displayed.
Should there still be air bulbs in the insert tubing after the rinsing, check whether
the tubing connections are sitting tightly on the micro dosing pump and the titration
tank. Then, repeat rinsing process.
Press key "Cancel", to nish rinsing process.
7 System settings