Memmert TTC 256 Temperature test chamber (Generation 2003) - Manual (Page 14)

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Design and description
► Calibration certificates for temperatures at –20 °C and +160 °C and for humidity at 30 °C
and 60 % rh
► A pre-formatted empty MEMoryCard XL with a storage capacity of 32 kByte.
► Reprogrammable for up to 40 ramp segments and in addition 135 hours of log memory
for temperature and humidity, with a scan interval of 1 minute (see page 58 ).
► Optional equipment (available separately as an accessory): External card reader for
MEMory-Card XL for connection to the PC-USB interface, printer cable (parallel, shielded)
25-pin (see page 59 )
► Language settings (German, English, French, Spanish, Italian) (see page 47 )
► Capacitive humidity sensor (only for CTC 256)
► Active humidity control guarantees that setpoint humidity is quickly achieved, with short
recovery times, and avoiding condensation formation (only for CTC 256)
► 7 different ramp close commands for sophisticated temperature control tasks (see page
38 )
► Visual and acoustic warning signals if temperature or humidity limits are crossed, and if
water container is empty
► Feed-through  80 mm on right with silicon sponge plug
► Internal log memory with 1024 kB as ring memory for all temperature and humidity val-
ues, errors and settings in real time and with date, logging approx. 3 months at 1 minute
storage interval (see page 57 )
► Calibration possible without separate computer: 3-point calibration on temperature con-
troller and 2-point calibration for humidity at 20 % rh and 90 % rh (see page 51 )
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 company MEMMERT.
2.6 Intended Use
CTC temperature test chambers and CTC climatic test chambers 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 the workplace health
& safety regulation VBG 24 of the Administrative Employers‘ Liability Insurance Association).
The chambers may only be loaded with materials and substances which cannot produce any
toxic or explosive vapours at temperature ranges up to 190 ºC, and which themselves cannot
explode, burst or ignite.
The test chambers may not be used for drying, vaporising and branding paints or similar
materials, 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 test
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.