CTC256

Memmert environmental test chambers guarantee the perfect atmosphere for climate and temperature tests

CTC256

CTC256

Standard delivery Environmental test chambers

Temperature

Setting accuracy temperature up to 99.9 °C: 0.1 / from 100 °C: 0.5
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 sensor 2 Pt100 sensors DIN Class A in 4-wire-circuit for mutual monitoring, taking over functions in case of an error
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)

Humidity

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 water (only for demineralised water with a conductivity of 5 to 10 μS/cm and a pH value between 5 and 7) from 2 x 10 l tank on telescopic slide integrated in chamber, with automatic change-over.

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, humidity 2-point calibration at 20% and 90 % rh

Ventilation

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 %

Communication

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)

Safety

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
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

Door door heating to avoid condensation
Ring heater high-performance ring heaters with optimised air circulation
Cooling twin compressor; refrigerant R449A

Standard equipment

Works calibration certificate standard values -20 °C and +160 °C, +30 °C at 60 % rh
Door fully insulated stainless steel door with double-locking and 4-point adjustment, heated
Entry port Entry port right, 80 mm, with stopper
Internals 1 stainless steel grid(s), electropolished
Interior Easy-to-clean stainless steel interior, materil 1.4301 (ASTM 304), hermetically welded

Stainless steel interior

Volume 256 l
Dimensions 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

Dimensions w(D) x h(E) x d(F): 898 x 1730 x 1100 mm (d +50mm door handle)
Installation on lockable castors
Housing rear zinc-plated steel

Electrical data

Electrical load 400 V, 3ph. w/o N 16A, 50 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 w x h x d: 1020 x 1910 x 1310 mm
Net weight approx. 337 kg
Gross weight carton approx. 463 kg

Standard units are safety-approved and bear the test marks

CE
EAC Eurasian Conformity

Temperature-humidity working range CTC

Not all climate chambers are the same. The humidity content of the chamber load, the ambient conditions and the respective temperature-humidity working range are decisive factors in the selection of the right appliance. In the adjacent diagram, you can see the possible temperature/humidity combinations for our climatic test chamber CTC.

Within the respective temperature-humidity range, condensation-free permanent operation is possible. To which extent condensation may occur in the threshold range depends on the humidity content of the chamber load and the ambient conditions.

This seems not to be the appropriate device for your temperature-humidity-working range?<br />See the other Memmert climate chambers.