BUCHI KjelSampler K-377 - Manual (Page 126)

7 Maintenance
126 K-375/376/377 Operation Manual, Version B
The value shown for “Calibration volume” is updated.
NOTE
Repeat this procedure until the entered and the dosed volume correspond. An acceptable difference
at 50 mL is ±5 mL.
H
2
O and NaOH can be dosed into the sample tube and then poured into a graduated cylinder for
measurement.
The H
3
BO
3
can be dosed directly into the receiving vessel and then poured into a graduated cylinder.
7 .3 .2 Checking the distillate amount
• Carry out preheating (three times) so that the system is warm before performing this test.
• Create a new method using the following parameters:
H
2
O volume: 0 mL
NaOH volume: 0 mL
Reaction time: 0 s
Distillation mode: Fixed time
Distillation time: 300 s
Stirrer speed distillation: 5
Steam output: 100 %
Titration type: None
Aspiration sample tube: Yes
Aspiration receiving vessel: No
• Run the method with an empty sample tube and empty receiving vessel.
• Measure the distilled quantity in the receiving vessel using a graduated cylinder.
NOTE
The distillate amount with above parameters must be
≥ 130 mL.