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5.Operation
5.7.2 Manual chamber defrost cycle
In addition to the automatic defrost cycle, a manual chamber defrost cycle can be activat- ed when necessary.
•Press until menu item ‘Set chamber temperature’ is displayed:
S E T T E M P C T - 3 0 ° C
-
•Press . A brief sound signals that the manual chamber defrost cycle has started:
S E T T E M P C T - 3 0 ° C
-
The manual defrost cycle ends either when the selected defrost cycle duration is over or when a chamber temperature of
To abort the manual defrost cycle:
•Go back to menu item ‘Set chamber tem- perature’ and press again.
Instruments with specimen cooling:
When defrosting starts, to avoid icing the spec- imen head is automatically adjusted to a tem- perature between
10 seconds after the manual chamber defrost cy- cle has been completed, the specimen head re- frigeration is switched back on, cooling down to the set value.
5.7.3Defrosting the specimen head (instruments with specimen cooling only)
To activate specimen head defrosting:
•Press until menu item ‘Set specimen temperature’ is displayed:
S E T T E M P O T - 3 5 ° C
•Press . A brief sound signals that the manual chamber defrost cycle has started:
S E T T E M P O T - 3 5 ° C
Specimen head temperature increases to be- tween +20 °C and +30 °C for a duration of 10 minutes, after which it returns to the set value.
To abort specimen head defrosting:
•Press until menu item ‘Set specimen temperature’ is displayed and press
once more.
46 | Instruction Manual V1.2 - 11/2006 |