BUCHI KjelFlex K-360 - Manual (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 •
2
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
2
O/Reagent can be dosed into the sample tube and then poured into a
graduated cylinder. H
3
BO
3
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.