Operation - J.P. SELECTA DOSI-FIBER 4 PLAZAS Manual De Instrucciones

MANUAL DE INSTRUCCIONES CODIGO 80055 REV D
J
.P. SELECTA s.a.u.
OCT/2018
- Place the crucible on an thermal insulating material and put alto-
gether in the hot furnace.
Crucibles must NOT be put on a cold surface after taking them from
the oven. They must be cooled slowly.
It is recommended to handle the crucible with the help of the handle
for crucible.

OPERATION

Sample and reagents preparation:
1. Grind the sample to a thick size (normally 1 mm. sieve).
2. Heat the reagent on a hotplate up to 95/100 ºC (accessory 4000634
or similar).
3- Fill the crucible with grinded samples and put them on the crucible
rack (4). The rack can be fixed to the front of the main unit. Use
the handle for crucibles to take them and insert them in the main
unit facing the heating elements (6). Lower the fixing lever (2) and
reflector.
4- Put all valves (5) in «OFF» position.
5- Open the cooler water inlet tap. Flow to 1 or 2 litres/minute.
6- Turn on the main switch (POWER) (9), the amber pilot lamp comes
on. Put the potentiomenter (7) in «OFF» position.
Hot extraction procedure:
7- Lift the top lid (1) and add the reagent in each column (10). To the
necessary quantity, (observe the quantity by the graded column).
8- Turn the potentiometer (7) clockwise up to a position of 80 or 90%.
The heating element starts up.
9- Add foam-suppressor in each column.
10- When the reagent begins to boil, lower the heater by turning the
potentiometer (7) unclockwise up to 20-30%.
11- During the extraction, the second reagent or distillated water can
be heated.
12- At the end of the extraction, turn off the heater switch (9).
13- Open the tap of the water jet pump (if this system has been used
to produce the vacuum pressure). Place the valves (5) in «Aspirar»
position. When the filtration is finished, close the valves.
14- If during the filtration, it is necessary to dissolve residue, turn
on the air pump switch (8) (PRESSURE) and place the valves in
«soplar» position, returning it to «aspirar» position afterwards.
The power of the blow pump is adjustable inside. See «MAIN-
TENANCE» section.
Ctra. NII Km 585.1 Abrera 08630 (Barcelona) España
e-mail: jpselecta@sefes.es - http://www.sefes.es/selecta
(It can be modified without notice)
Tel (34 3) 770 08 77 Fax (34 3) 770 23 62
Pag.: 23