Techfrost E Series User Manual page 42

program.
Press the key START / STOP to start the BLAST FREEZEING.
The phase of BLAST FREEZEING will last 240 minutes.
I can modify the time of the phase of BLAST CHILLING pressing the key UP to increase the time, the
key DOWN to decrease the time. This option is active only after having started the program. Once
the cycle of 240 minutes is over, the device will pass in conservation (setpoint -20°C)
During the demolition the display visualizes the temperature noticed by the
core probe and the LED
To visualize the temperature of the cell to press and to release the BLAST CHILLING key, the BLAST
FREEZING key or the HARD / SOFT key; to restore the normal visualization please press again and
release the same key or do not operate for 15 s. If the temperature noticed by the core probe reaches
the temperature of end blast chilling cycle within the maximum duration of the blast chilling cycle,
the cycle will be completed with success, the device will automatically pass to consevration and the
buzzer will be activated.
During the conservation the display visualizes the temperature noticed by the cell probe and the
LED has turned on.
If the temperature noticed by the core probe doesn't reach the temperature of end blast chilling
within the maximum duration of the blast chilling, it won't be completed with success but it will con-
tinue, the LED
and stop the buzzer please press and release a key. To visualize the cell temperature please press
and to release the BLAST CHILLING key; to restore the normal visualization please press again and
release the key BLAST CHILLING or do not to operate for 15 s.
When the temperature noticed by the core probe reaches the temperature of end blast chilling cycle,
the device automatically passes to the conservation phase with the same formalities mentioned be-
fore.
8.6 Pre-cooling start
Every cycle of operation can be preceded by a pre-cooling phase.
To start the pre-cooling phase please operate in the suitable way:
• Please make sure that the device is in the state "on."
• Please make sure that some procedure is not in progress.
Please keep the BLAST CHILLING key pressed for 1 s: the LED
To stop the pre-cooling phase please operate in the suitable way:
• Please keep the BLAST CHILLING key pressed for 1 s or to start a cycle of operation.
When the cell temperature reaches the one established the pre-cooling phase continues, the LED
remains permanently turned on and the buzzer is activated for 1 s.
8.7 Core probe correct insertion checking test
If the core probe is trained the temperature cycles are preceded by a test on two phases for the veri-
fication of the correct insertion of the core probe.
The second phase is performed only if the first one is not completed with success.
The first phase is completed with success if the difference "temperature noticed by the core probe
- cell temperature " is higher than the one established at least in 3 controls on 5 (controls are perfor-
med to intervals of 10 s; to consider the difference without sign).
The second phase is completed with success if the difference "temperature noticed by the core probe
- cell temperature " is higher than 1 °C / 1 °F, in comparison to the control performed before, at least
in 6 controls on 8 (controls are performed to intervals of 1 / 8 of the time; to consider the difference
without sign).
If the test is completed with success, the cycle will be started; if the test is not completed with suc-
cess, the LED
To start the temperature cycle to press the BLAST CHILLING key or the BLAST FREEZING key howe-
42
has turned on.
will flash and the buzzer will be activated. To restore the normal visualization
will flash and the buzzer will be activated for 5 s every 15 s.
will flash.
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