Memmert HPP 108/749 Constant climate chamber (Generation 2003) - Manual (Page 43)

43
Advanced functions
The realtime clock, which is set in the SETUP, contains the date and clock time. The realtime
clock is used for logging purposes in accordance with GLP. Date and clock time are specified
on the log printout. On graphical printouts, the time axis is labeled with the realtime. The
clock is battery-buffered and is independent of the mains connection. The integrated Lithium
battery of the type CR 2032 has a lifetime of approx. 10 years.
7.3 Temperature monitoring and safety equipment
The monitoring temperature is measured via a separate Pt100 temperature sensor in the
chamber interior (see Fig. 9 on page 20 ). The monitoring unit is used to protect the chamber
load and as a protection for the appliance and surroundings.
Temperature monitoring can be adjusted independently of the operating modes.
In ramp operation mode, the monitoring temperature must always be set at least 3 K
above the maximum working temperature.
MIN
MAX
AUTO
°C
6
5
4
3
1
2
Fig. 23 Temperature monitoring display
1 Visual alarm icon
lit up: TB alarm
flashing: TWW alarm, TWB alarm, ASF alarm
2 Undertemperature protection
3 automatic temperature monitor (ASF, see page 45 )
4 Overtemperature protection (TWW, TWB, see below)
5 Response temperature
6 Acoustic alarm icon