Memmert HPP 108/749 Constant climate chamber (Generation 2003) - Manual (Page 12)

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Design and description
► 7 different ramp close statements for sophisticated temperature-control tasks
► Acoustic and visual signals if temperature or humidity limits are crossed, and if water tank
is empty
► Internal log memory with 1024 kB as a ring memory for all temperature and humidity
values, errors and settings with realtime and date, logging for approx. 3 months with a
1-minute logging interval
► Calibration possible without separate computer: 3-point calibration on controller for tem-
perature and 2-point calibration for humidity at 20 % rh and 90 % rh
► LED interior light ( light panels) in various light colours (optional)
2.5 Material
For the outer housing, MEMMERT uses stainless steel (W.St.No. 1.4016 = ASTM 430), for the
interior, stainless steel (W.St.No. 1.4301= ASTM 304) is used, which stands out through its
high stability, optimal hygienic properties and corrosion-resistance towards many (but not all!)
chemical compounds (caution for example with chlorine compounds).
The chamber load for the appliance must be carefully checked with respect to chemical com-
patibility with the materials mentioned.
A resistance table for all these materials can be requested from the MEMMERT.
2.6 Intended use
Constant climate chambers HPP may be used exclusively for temperature and climate testing
of materials and substances in the context of the procedures and specifications described in
this manual. Any other use is improper, and may result in hazards and damage.
The test chambers are not explosion-proof (they do not comply with workplace health &
safety regulation VBG 24). The chambers may only be loaded with materials and substances
which cannot produce any toxic or explosive vapours at temperature ranges up to 70 ºC, and
which themselves cannot explode, burst or ignite.
The test chambers may not be used for drying, vaporising and branding paints or similar ma-
terials, the solvents of which could form an explosive mixture when combined with air. If there
is any doubt as to the composition of materials, they must not be loaded into the constant
climate chamber. Potentially explosive gas-air mixtures must not be produced, either in the
interior of the chamber or in the direct vicinity of the appliance.