4.1 Digestion Process Operation - Selecta DQO 6 Manual De Instrucciones

MANUAL DE INSTRUCCIONES 80158 REV D
ATTENTION:
Possible splashes of
sulfuric acid.
Use
gloves and
protective goggles
in the manipulation of the rack with
samples
or to approach the digester for visual
inspection.
WARNING:
Use gloves.
The drops that falls
from the
collector or the hoses
are from
sulphuric acid.
Manipulate with caution
to avoid chemical burns on the
skin.
J
.P. SELECTA s.a.u.
OCT/2019

4.1 Digestion process operation

The suggested sequence for preparing and starting the complete digestion
system is:
• Prepare the reagents and the samples in the digestion tubes. See the digestor's
instructions.
• Program the temperature controller for a three steps digestion cycle. According
to the digestor instructions manual.
• Insert the sample tubes in the block-digestor and cover them with the fume
collector.
• Check that the vacuum pump is ready. That is, the water tank and the external
circulating in OFF.
• Check that the scrubber bottles have the sodium carbonate solution.
• Assembly the hoses:
• Start the digestion cycle from the temperature controller.
• Start the vacuum pump.
• Visually check every 30 or 40 minutes, the digestion process.
• When finishing the digestion process, the temperature process beeps.
Then carry out the following operations, with caution:
• Remove the tubes rack from the digester without disconnecting any
hose and leave it on the holder.
• Keep the vacuum pump on.
• Remove the fume collector from the tube rack and leave it on the
holder.
• Fume collector cleaning:
You can simply clean the fume collector with water.
• Water tank emptying:
To empty the tank, just remove the «emptying tube» from the upper connector.
• Water circulating function:
The vacuum pump can also work as a water closed circuit.
- Connect the hose to the «water circulating out port».
- Place the «water circulating switch» in the ON position.
- When starting the pump, this will move the tank water to the «water circulating
out port».
Ctra. NII Km 585.1 Abrera 08630 (Barcelona) España
e-mail: [email protected] - website: http://www.jpselecta.es
(Sujetas a modificaciones sin previo aviso)
Ø 10 hose from the Scrubber to the vacuum pump.
Ø 12 hose from the collector to the Scrubber.
Tel 34 93 770 08 77 Fax 34 93 770 23 62
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