Technologies applied

Heating/cooling technology
The Memmert Peltier technology is particularly economical at temperatures close to the ambient temperature due to the special properties of the Peltier elements.

 

Control Technology Constant Climate Chamber

 
Humidity diagram Memmert HPP (humidity range depending on temperature)

Precise conditions for material test and environment simulation

For a material test in a constant climate, specifically the stability test in accordance with the ICH (International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use) it is above all the precisely adjustable temperature/humidity constellations, stable over long periods, that are of crucial significance. The combination of Peltier technology for heating, cooling and dehumidifying, as applied by Memmert in its HPP constant climate chamber, is so far unique on the market.

A multifunctional fuzzy controller (P class), with permanent performance adjustments and integrated self-diagnosis system, as well as two high-quality platinum temperature sensors Pt100, ensure absolutely reliable temperature control in the constant climate chamber, as well as the highest process safety and control accuracy.

Technical specifications

  • Temperature range 5 °C to 70 °C with a display and setting accuracy of 0.1 °C
  • Over and under temperature protection: An adjustable over/under temperature controller TWW protection class 3.3 takes over control in case of failure  at a preset temperature. ASF Automatic Safety Function - a unique safety function - for over- and undertemperature automatically following the setpoint in a freely selectable tolerance range. An alarm sound is activated in case of over- /undertemperature, and the heating function is switched off in case of overtemperature, cooling function is switched off in case of undertemperature.
  • 2 high-grade platinum temperature sensors Pt 100 in a 4-wire circuit (for stable long-term transmission of measurement signals) communicate with each other and ensure uninterrupted error-free temperature control at constant working temperature
  • Digital programme control (programmable to the minute) for temperature profiles consisting of up to 40 ramps
  • Weekly timer programmable to the minute
  • Simultaneous display of all parameters, such as  temperature, humidity, weekday, time, and number of ramps
  • Visual and acoustic alarm in case of over-/undertemperature over-/underhumidity and empty water tank 
  • Alphanumeric text display in different languages (D/UK/E/F/I)
  • Function signals for stand-by, operating mode, heating, cooling, humidification and malfunction over/undertemperature
  • Internal log memory with 1024kB to save temperature, humidity and error states, with timestamp to the minute
  • Chip card control including 1 MEMoryCard XL with 32 kB memory capacity (max. 40 ramps)
  • Serial USB-interface and software Celsius to read out the appliance's internal log memory
  • Parallel printer interface for printout of log data via an external PCL3-compatible inkjet printer (USB available via converter)