Properties; General Information; Warranty Statement; Physical Properties Of The Glass Ceramic - Xylem Sl Analytics SLK 12 Manual De Instrucciones

1 Properties

General information

Heating aqueous solutions without any combustible components in glass vessels is the main area of the la-
boratory hotplate with a glass ceramic heating surface. Since the laboratory hotplate become hot inside and
on the glass-ceramic heating surface, all other applications require careful consideration, whether this can
create a dangerous situation.
The glass ceramic of the laboratory hotplate by SI Analytics has special thermal qualities. The glass ceramic
heating surface has almost no thermal expansion properties and has a thermal shock resistance of - 200 °C to
+ 700 °C.
In addition to the thermal properties, the glass ceramic has the chemical stability and surface quality of lenses.
Due to the high infrared - permeability of the glass ceramic, heat energy is transferred quickly and at a low
loss. After being switched off, the existing residual heat can be used to save energy by preheating another
vessel.
The glass ceramic surfaces remain flat, are nonporous and do not have a limiting frame or dirt traps. The la-
boratory hotplate by SI Analytics is therefore easy to clean.
The functions of the laboratory hotplate is controlled by a continuously variable energy regulator.
Limitations in the application are described in Chapter "Warning and Safety Instructions".

Warranty statement

We assume the warranty against manufacturing defects that are discovered within two years from the date of
purchase for the described units. The warranty claim extends to restoring the operational readiness, but not to
any further rights to assert claims for damages.
The warranty will be void in the event of improper handling or unauthorized opening of the unit. Excluded from
the warranty are wear parts such as heater reflectors. Similarly, the breakage of the glass ceramic plate and
corrosion damage due to improper use in aggressive environments is excluded from the warranty.
To ascertain the warranty liability, we ask you to send us the unit and proof of purchase showing the date of
purchase, freight prepaid or postage paid.

Physical properties of the glass ceramic

Heat expansion coefficient α:
Density ρ:
Elasticity module E:
Knoop-hardness at 1N load:
maximum temperature rating: T
static load: Surface load:

Chemical properties of the glass ceramic

Water resistance DIN ISO 719:
alkali resistance DIN 52 322 / ISO 685:
acid resistance DIN 12 116:
20; 300 °C:
300; 700 °C:
2.58 g / cm
92 kN / mm
> 575 HK (Test according to ISO 9385)
permanently: 700 °C; short-term (max. 1 min.): ≤ 850 °C
max
0.1 kp / cm
hydrolytic class 1
class 2
class 3
-6
- 0.41 10 /K
+ 0.13 10 -
6/
K
3
2
2 2
(approx. 1 N / cm
)
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