BUCHI KjelSampler K-377 - Manual (Page 56)

5 Putting into operation
56 K-375/376/377 Operation Manual, Version B
5 .8 .5 Connecting a bar code reader
A USB barcode reader can be used to read in data, e.g. a sample name or the weight of a sample,
that is printed in form of a barcode. The barcode reader can be connected to the corresponding USB
connector on the rear side of the K-375. (See chapter 5.2.1 “Connections of the K-375”.)
5 .8 .6 External dosing unit for back titration
The external dosing unit is connected to the port “Base” on the rear side of the instrument. (See
position j in figure 5.1) . For installation and assembly of the dosing unit, refer to the instruction
manual of the dosing unit.
NOTE
For optimum performance and minimal fluctuation of the measured values, the dosing tip of the
dosing unit with the titrant always has to be placed in position “TITR” of the receiver. The second
dosing tip can be placed in any other position!
5 .8 .7 Electrode connection
Connect the pH electrode to the electrode cable already mounted. Remove the pH electrode from
the storage cap and insert it into the titration vessel.
NOTICE
Risk of device damage wrong storage.
• Always store the pH electrode in the storage cap in saturated KCl solution (4.2 mol/L).
A pH electrode should not be stored dry as this would destroy the diaphragm. If a pH elec-
trode has been stored dry, let it regenerate in saturated KCl for 24 hours or at least over night
prior to further use.