17
BÜCHI
Distillation Unit
K-314
6 Maintenance
Büchi’s customer service offers the following services:
•
Replacement part service
•
Repair service
•
Maintenance service
•
Technical consultation.
6.7
Main fuses
Please change the main fuses as follows::
•
Pull out mains cables
•
Pull out fuse holders
햲
•
Replace the defective mains fuse by a new one with same
performance
햳
:
- 230V:
T 10A L 250V
•
Insert again fuse holders
6.8
Checking the unit
In order to check that the unit is functioning properly, do a
nitrogen analysis using ammonia salt. For a standard
application, we recommend the following parameters:
Standard substance: Ammonium dihydrogen phosphate
p.A.
Molecular weight:
115.03
Nitrogen content:
12.17%
Originally weighed in:
400 to 500 mg
H
2
O:
20 ml
NaOH:
20 ml
Distillation time:
4 min
Titration:
Sulphuric acid 0.5 N
Consumption:
approx. 7-10 mL
Table 7: Checking th unit parameters
Fig. 14: Device plug, inserted
햲
햳
