Selecta DQO 6 Manual De Instrucciones página 23

cooling can be accelerated by blowing cold air with
a small fan. If the sample is too hot, we could
have a violent reaction when adding water and some
sample may be lost. On the other hand, if it is too
cold, salts can be precipitated and this will be
difficult to dissolve (solidifications must be avoided,
but if this occurs, place the tube in the heater block
again for a short time).
INSTRUCTION MANUAL CODE 80158 REV D
11- Leave tubes to cool down before distilling.
Assembly with fume extraction by
MAINTENANCE
vacuum tube (Its effectiveness depen
Before removing the cover, disconnect the
on the vacuum tube).
equipment from the mains.
The control board could only be manipulated by
duly authorized maintenance people.
CLEANING:
For cleaning the equipment, we recommend the use of
the following products:
Autovía A-2 Km 585.1 Abrera 08630 (Barcelona) España
e-mail: selecta@jpselecta.es - website: http://www.jpselecta.es
"Scrubber" unit 4001611
J
.P. SELECTA s.a.u.
OCT/2019
- Place all the equipment on an appropriate construction (table, bench, ...) to
the weight of it.
- Remote or isolated from the presence of personnel.
- Need several outlets.
Details for fume extraction:
1. Kjeldahl digestion generates highly corrosive acid fumes and irritating to
humans and animals. They are not toxic.
2. Although means for extracting fumes are installed, it should be set in an
isolated area of the laboratory.
3. Avoid unnecessary exposure to fumes.
4. If installed in a fume hood, this must be constructed of suitable materials,
plastics, glass, ...
Tel 34 937 700 877 Fax 34 937 702 362
5. The draw-fumes with a jet vacuum pump may be sufficient, but within an
enclosed with external ventilation. Its effectiveness depend on the actions of
the vacuum tube. A water tap (with a minimum pressure of approximately 2.5
bar) and a drainage are needed.
6. Fumes extraction with a scrubber unit or two and a vacuum pump water
circulationis recommended. It can be done without hoods or booths.
7. For MACRO 20 places systems, it is recommended installing two Scrubber
units both connected to the two vacuum inputs.
Vacuum pump for the absorption of fume.
NaOH
MACRO 20 p
600ml water
+
150gr Na CO
2 3
Ctra. NII Km 585.1 Abrera 08630 (Barcelona) España
e-mail: selecta@jpselecta.es - website: http://www.jpselecta.es
(It can be modified without notice)
Ø12x17
Ø10x14
2x 600ml water +150g Na CO
2
Ø7x10
Ø10x14
Reduction
10gr
Na CO
2 3
3
10gr
Na CO
2 3
Tel 34 93 770 08 77 Fax 34 93 770 23 62
Page: 23