Memmert INCO 246/246 med CO2 Incubators (Generation 2003) - Manual (Page 47)

47
Advanced functions
Oxygen calibration (Cal 0
2
)
(only for models with O
2
module, see page 57 )
on
off
C A L o
2
o f f
Leave Setup
Save all settings and leave the SETUP mode.
The realtime clock, which is set in the SETUP, contains the date and clock time. It 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 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
The monitoring temperature is measured via a separate Pt100 temperature sensor in the
chamber interior. The monitoring unit is used to protect the chamber load and as a protection
for the appliance and surroundings.
The appliance has a double overtemperature fuse (mechanical/electronic) in accordance with
DIN 12880.
°C
MIN
AUTO
MAX
1
2
3
1 6
5
4
Fig. 23 Temperature monitoring display
1 Visual alarm icon
Lit up: TB alarm
Flashing: TWW alarm, ASF alarm
2 Undertemperature limit
3 Automatic temperature monitor (ASF, see page 50 )
4 Overtemperature protection (TWW, TWB, see page 48 )
5 Response temperature
6 Acoustic alarm icon
7.3.1 Mechanical temperature monitoring: temperature limiter (TB)
The incubator is equipped with a mechanical temperature limiter (TB) protection class 1 in ac-
cordance with DIN 12880.
If the electronic monitoring unit should fail duiring operation, and the factory preset maxi-
mum temperature is exceeded by approx. 20 °C, the temperature limiter, as the final protec-
tive measure, switches off the heating permanently. As a warning, the icon lights up.