9
OPTIONAL EXTRAS WHERE FITTED
ALL NON PROGRAMMABLE MODELS
3.0 AUTOMATIC TEMPERATURE CYCLING
On these models, the digital controllers are mounted either side of a time clock
and will be illuminated in turn according to the time clock settings. (NB –On
changeover the controller will briefly indicate 18.8.8 for few seconds –this is
quite normal).
Changing from one controller to the other is done automatically by a time
switch which can be one revolution every 24 hours or one revolution every 7
days, depending on whether a 24 hour or 7 day clock is fitted.
After removing the time switch cover, time settings can be adjusted by pulling
outwards the segments and reinserting them according to requirements.
To set the time initially, the clock hands can be turned forwards in time
(clockwise) but not backwards (anti clockwise).
3.1 AUTOMATIC DEFROST
On Series 3 and optionally on Series 1, the cabinet is set to defrost for a
duration of 10 minutes in every 6 hours. This defrost will give a slight rise in
air temperature. If this rise should create any problems the defrost can be
over-ridden by the defrost isolator switch at the back of the electrics
compartment. On Series 4 the defrost occurs 4 times every 24 hours;
duration is controlled by the ice build up internally.
On Series 1 and Series 3 cabinets, any defrost water drains away to a tray
mounted on the compressor. On Series 4 cabinets the water drains into a tray
(supplied) which must be fitted in the special tracks mounted underneath the
cooled incubator during installation. On all models this water evaporates
harmlessly away.
3.2 HIGH/LOW ALARM OPTION
The high/low alarm is a manually adjusted alarm option fitted to the
instrument’s front panel.
In the event of an alarm condition, the following action will be taken:
An audible alarm will sound and a secondary safety system will be activated,
preventing the cooled incubator temperature from rising above or falling
below the set alarm limits.
