Environmental Test Chamber CTC256

CTC256 – Let us help you build the perfect environmental test chamber. Contact us for customization options and pricing.

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Environmental Test Chamber CTC256

Temperature range without humidity from -42°C up to 190°C
Temperature range with humidity from 10°C up to 95°C
Temperature distribution (spatial) /- 0.5 up to 2K
Temperature 2 Pt100 sensors Class A in 4-wire-circuit, mutually monitoring and taking over the performance at the same temperature value
Display resolution of display for setpoint values 0.1°C up to 99.9°C, 0.5°C from 100°C and for actual values 0.1°C (LED)


Humidification humidification by hot steam generator
Humidity control active humidifying and de-humidifying adjustable from 10-98 % rh with digital display of relative humidity – resolution of display 0.5 %, setting accuracy 1 %
Humidification By hot steam generator. Humidity supply with distilled water from 2 x 10 l tank on telescopic slide integrated in chamber, with automatic change-over.
Dehumidification 2 x 10 l tanks as condensate collector

Control technology

Controller Electronic microprocessor temperature controller with auto-diagnostic system
Set-up Display digital display of all set parameters, such as temperature, weekdays, time, humidity, fan speed, programme status and set-up values – language to be chosen via set-up
Timer integrated timer for tempering profiles of up to 40 ramps each, each segment adjustable from 1 min. to 999 hrs.
Calibration three freely selectable temperature values


Fan high-performance air fan in working chamber
Fan control depending on operation status automatic adaption of fan speed resp. manual adjustment from 10 to 100 %


Interface USB USB-interface incl. Memmert software “Celsius” for programming and documentation
Interface Printer parallel printer interface (incl. real time clock with date function) for all PCL3-compatible ink jet printers for GLP-conforming documentation
Documentation integrated ring memory as data logger for GLP-conforming long-term documentation of all relevant parameters – 1024 kB
Documentation programme stored in case of power failure
Programming chip-card control incl. 1 MEMoryCard XL with 32 kB storage capacity (max. 40 ramps)


Temperature control mechanical temperature limiter TB, protection class 1 according to DIN 12880 to switch off the heating approx. 10°C above nominal temperature
Temperature control over- and undertemperature monitor TWW, protection class 3.3 or adjustable temperature limiter TWB, protection class 2, adjustable at controller
AutoSAFETY additionally integrated over- and undertemperature protection “ASF”, automatically following the setpoint value at a preset tolerance range, alarm in case of over- or undertemperature, heating is switched off in case of overtemperature, compressor in case of undertemperature
Autodiagnostic system integral fault diagnostics for temperature and humidity control
Alarm with visual and acoustic alarm in case of over-/under temperature and underhumidity, open door and empty water tank

Heating concept

Ring heater high-performance ring heaters with optimised air circulation
Door door heating to avoid condensation
Cooling twin compressor; chlorine-free refrigerant R404A

Standard equipment

Internals 1 stainless steel grid(s), electropolished
Works calibration certificate standard values 10 °C and 37 °C, 60 % rh at 30 °C
Door fully insulated stainless steel door with double-locking and 4-point adjustment, heated
Interior easy-to-clean stainless steel interior, materil 1.4301 (ASTM 304), hermetically welded

Stainless steel interior

Volume 256 l
Dimensions W x H x D in mm w(A) x h(B) x d(C): 640 x 670 x 597 mm
Max. number of internals 6
Max. loading per internal 25 kg

Textured stainless steel casing

Installation on lockable castors
Dimensions w(D) x h(E) x d(F): 898 x 1730 x 1100 mm
Housing rear zinc-plated steel

Electrical data

Electrical load 400 V, 3 phases, 50/60 Hz / approx. 7000 W

Ambient conditions

Set Up The distance between the test chamber and the walls/ceiling must be at least 25 cm.
Ambient temperature 16 ºC to 28 ºC
Humidity rh max. 70 %, non-condensing
Altitude of installation max. 2,000 m above sea level
Pollution degree 2

Packing/shipping data

Transport information The appliances must be transported upright
Customs tariff number 8419 8998
Country of origin Federal Republic of Germany
WEEE-Reg.-No. DE 66812464
Dimensions approx incl. carton B x H x T: 1020 x 1910 x 1310 mm
Net weight approx. 337 kg
Gross weight carton approx. 463 kg

Additional information

Weight 1020 lbs
Dimensions 43 × 35 × 68 in