Memmert ICH 256 Climate Chambers (Generation 2003) - Manual (Page 59)

59
Advanced Functions
Due to this automatic defrosting, there is a minor brief increase in the chamber temperature
at regular intervals. If you would like to further reduce this detraction in performance, you can
decrease the defrosting frequency, e.g. to every 24 hours.
In this case, please observe if there is a permanent drop in the cooling performance or a
strong fluctuation of the actual value, which may be an indication that the cooling unit is icing
over. If this is the case, please set the automatic defrosting system one level higher.
If humidity/room temperature are particularly high, it is possible that the factory setting
for defrosting, 12 hours, is not sufficient. If this is the case, you should set a more frequent
defrosting interval, e.g. every 6 hours.
Automatic defrosting is disabled with the parameter OFF. When operating at low tempera-
tures, this causes the cooling unit to ice over over time. Regular defrosting needs to be carried
out in order to prevent damage to the cooling system.
7.7 User ID card (optionally available as an accessory)
The device number of the appliance and a
unique user number are stored in
encrypted form on the user ID card ( Fig.
27 ). The user ID card therefore works
only in the appliance with the
corresponding serial number.
To use it, insert the card into the chip
card reader (see page 11 ) on the
appliance control panel.
If the user ID card has been inserted, the
additional menu item ID-LOCK appears
in the SETUP menu. If this setting is
changed to ON, the appliance is locked
against all adjustments once the chip
card is removed.
Locking with the user ID card is displayed with the lit up icon on the control
panel (see also page 28 ).
Every login process with the user ID card is logged in the internal flash memory of the
controller.
7.8 Calibration
7.8.1 Temperature calibration
The cooled incubator can be calibrated customer-specifically using three calibration
temperatures of your choice:
►
CAL.1 Temperature calibration at low temperature (e.g. 5 °C)
►
CAL.2 Temperature calibration at medium temperature (e.g. 25 °C)
► CAL.3 Temperature calibration at high temperature (e.g. 50 °C)
access
authority
card
Name:
ID:
_____________________
_____________________
Fig. 27 User ID Card