Thermo Scientific 7450, Руководство по эксплуатации и техническому обслуживанию

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Caution Do not allow the sample probe to come into contact with the
chamber interior during operation. This could cause a displayed Sample
probe temperature shift.
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If the temperature of the Chamber or Sample probe reaches the chamber
design high or low temperature limit (design temperature limits are factory
pre-set at +55°C and -185°C), the controller will:
1. Sound a Temperature Limit alarm,
2. Light the Alarm LED,
3. Sound the audible alarm at a 75% on-duty cycle (2 second period),
4. Show “C temp limit” or “S temp limit” on the fourth line of the
display depending on which probe is at (or exceeding) the design
temperature limit (alternated with normal fourth line display contents
at a 2 second rate),
5. Continue the profile run without interruption.
This is a “self clearing” alarm. While in the alarm condition, the audible
alarm can be silenced by one depression of the Silence key, but the Alarm
LED continues to flash and the alarm message displays as long as the
alarm condition is present. When the chamber temperature returns to a
value within the pre-set limits, the Alarm LED stops flashing and the
audible alarm mutes (if not already muted by pressing the Silence key).
However, the alarm message remains on the fourth display line until the
Silence key is depressed. If the temperature of either probe continuously
exceeds the pre-set limit temperatures for more than 10 minutes, the unit
will immediately switch to Idle Mode and disable all functions.
7007452 CryoMed Freezer 2-15 Thermo Scientific
Section 2
Set-Up and Operation
Chamber/Sample
Over/Under Limit Temp