Buchi KjelFlex K-360 User Manual download pdf (Page 36)

6 Operation

36 KjelFlex K-360 Operation Manual, Version C

6.4.1 Pump calibration

Go to Pump Calibration and press Enter. The following screen appears:

Fig. 6.3: Pump calibration

It is recommended to calibrate the pumps with the same volume as used for the methods. To perform

the calibration a graduated cylinder is needed.

To carry out the pump calibration, proceed as follows:

Choose the required pump by pressing left / right arrow repeatedly, when e.g. “H•

0” is highlighted.

Enter the quantity to be dosed (Dose Volume), e.g. 50 ml.•

Press Run to start dosing.•

Measure the dosed volume and enter the measured volume.•

Press Cal to calibrate the pump. When the calibration is ﬁnished a corresponding calibration factor •

appears.

NOTE

Repeat this procedure until the entered and the dosed volume correspond. An acceptable difference

at 50 ml is ±2 ml. NaOH/H

O/Reagent can be dosed into the sample tube and then poured into a

graduated cylinder. H

is dosed directly into the receiving vessel and then poured into a gradu-

ated cylinder.

It is recommended to repeat the pump calibration regularly (once a month or every 100 distillations).

6.4.2 Setting date and time

Go to Set Date and Time and press Enter. The following screen appears:

Fig. 6.4: Date/Time

Enter the corresponding settings via keypad and press Save to store them.

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Buchi KjelFlex K-360 User Manual Page 36