Memmert HPP 108/749 Constant climate chamber (Generation 2003) - Manual (Page 11)

11
Design and description
Range A:
In this range, temperature and humidity can be combined as you please, without resulting in
any significant condensation. If there are extreme ambient conditions, the working range may
be restricted.
Range B:
If the specified range is exceeded upwards, e.g. 80 % rh at 60°C, the hot steam fed in will im-
mediately condense, due to the dew-point, at the coldest point in the appliance.
Range C:
At low temperatures and low relative air humidity, the effective range is heavily dependent on
the degree of humidity of the chamber load.
2.4 Basic equipment
► Low-noise, long-life and energy-saving Peltier cooling and heating technology (in heat-
ing mode, part of the energy required is extracted from the surroundings = heat pump
principle)
► Electronic fuzzy-supported PID process controller with permanent performance adjust-
ments and time-saving self-diagnosis system to quickly locate errors (see pages 38 and 45)
► Alphanumeric text display
► Control of the appliance and logging the actual values with a preformatted empty
MEMoryCard XL (storage capacity 32 kByte, reprogrammable for up to 40 ramp segments
and in addition 135 hours of log memory for temperature and humidity with a scanning
interval of 1 minute)
► Programme sequence control for up to 40 ramp segments
► Integrated week time switch with group function (e.g. all working days)
► Retracting push-turn control for simple operation
► Optical alarm display
► Integrated horn as alarm if limit values are crossed, as acoustic signal when programme
ends and to confirm input (button click)
► Digital monitoring control for overtemperature, undertemperature and automatic tem-
perature monitor (ASF)
► Two separate Pt100 temperature sensors DIN class A in a 4-wire circuit for control and
monitoring
► Parallel printer port (PCL3-compatible)
► USB interface for computer-based temperature control programmes and to read out the
controller’s internal log memory
► MEMMERT software "Celsius" for remote control of the chamber via computer (see page
37) and to read out the internal controller log memory
► As an optional accessory, external card reader for MEMory-Card XL for connection to the
PC-USB interface, printer cable (parallel, shielded)- 25-pin
► Language setting (German, English, French, Spanish, Italian)
► Capacitive humidity sensor
► Active humidity control guarantees that setpoint humidity is quickly achieved, with short
recovery times, and avoiding condensation formation