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Polymax 1, 1 (120 °C), 3 and 5
7.5 Pressure adjustment
The pressure inside the polymerisation
pot can be adjusted infinitely variable
between 3 bar and the maximum value
of the unit in question. For this purpose
pull out the reduction valve (24) at the
rear of the unit by means of the knob
and turn it anti-clockwise until there is
no resistance anymore (valve closed).
8. Operation Polymax 1 (120 °C)
Besides the general temperature area
of 0–95 °C the Polymax 1 (120 °C) also
permits to increase the water tempera-
ture to 120 °C. As the boiling point of
water is 100 °C, higher temperatures
may only be reached under pressure.
In order to avoid that hot water vapour
of 120 °C escapes from the pressure pot
and in order to reduce the risk of scald-
ing when opening the lid, the Polymax
1 / 120 °C is equipped with a safety lock
which only allows the lid to open when
the operating pressure in the unit has
fallen and the temperature is lower
than 95 °C (203 °F). This is also appli-
cable in case of power outage.
This means that in the application pro-
cess the pressure pot has to remain
closed when the unit is turned off and
pressure is exerted.
When the unit is turned on at the main
switch (14) the pressure pot exhausts
automatically and the lid (2) can be
opened.
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Start pressure-polymerisation (see 7.3)
and turn the pressure reduction valve
clockwise. The manometer (a) shows the
adjusted pressure. When attaining the
desired pressure, let knob latch again.
Important: Do not adjust the pressure
below 2.5 bar! Lower pressure may
lead to leakage of the pneumatic seal-
ing between polymerisation pot and lid.
Adjustment of temperature and poly-
merisation time is to be executed as
described from point 7 et seqq. If a
temperature >95 °C is required, 95 °C
should be selected as pre-warming
temperature; the final temperature is
to be adjusted directly before the poly-
merisation process.
According to the temperature of
the water bath the objects have
to be inserted and taken out with
suitable instruments!
The time until the final temperature is
reached has to be added to the gen-
eral polymerisation time. This can differ
between 10 and 20 minutes, depend-
ing on the water filling level. As long as
the value in the temperature indication
display (d) blinks, the final tempera-
ture has not been reached. The present
temperature of the water bath can be
checked at all times by pressing the
temperature switch (e), (see point 7.4).
When the time has passed the unit
fallen below 95 °C. During this time
ventilates automatically. The lid of the
the cooling air is released by means
Polymax 1 (120 °C) can, however, only
of the ventilation valve. When operat-
be opened, if the temperature of the
ing at 120 °C the cool down phase can
water bath has fallen below 95 °C.
take 5–8 minutes from time expiration
to the opening of the lid.
If the pressure pot has got a tem-
perature of more than 95 °C after the
The possibility of opening the lid is indi-
time has run out, it is cooled down
cated by the green control lamp (h).
by cold air until the temperature has
Open the lid and remove the objects.
9. Abort / termination of programme
The polymerisation process can be ter-
For following polymerisation processes
minated prematurely. For this purpose
with identical temperature continue as
push the adjustment knob (b) for 3 sec-
described from point 7.2 on.
onds. The Polymax ventilates automati-
cally, the display for time shows 0, the
pre-adjusted temperature is maintained.
10. Change between °C and °F
At delivery the Polymax units are
Exception Polymax 1 (120 °C): The time
adjusted to °C. In order to change
indication display (f) shows the maxi-
to °F push the temperature switch (e)
mum values 120 °C or 248 °F. Push the
and the main switch (14) at the same
adjustment knob (b) one time in order
time. The temperature indication dis-
to confirm the selected temperature
play (d) shows L (which stands for °C),
denomination. The time and temper-
the time indication display (f) shows
ature indication displays (d + f) indi-
the maximum value of 95. By turning
cate 0. Then go on as described from
the adjustment knob (b) it is possible
point 7 on.
to change between L (°C) and H (°F).
When the machine is adjusted to H
the time indication display shows the
value 203.
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