Thermo Scientific 7451 Operating And Maintenance Manual page 97

Section 10
PC Interface Software
Operating Indicators
(continued)
10-14 Controlled Rate Freezer
For more information on the alarms listed below, see the Controlled Rate
Freezer manual.
• Temperature High (tracking)
• Temperature Low (tracking)
• Power Fail and failure duration
• Chamber Sensor Failure
• Sample Sensor Failure
• Chamber Limit Temperature
• Sample Limit Temperature
• Heater Malfunction
• LN Supply
2
• Run Complete
• Warm Complete
• CRF Printer Buffer Full
When an alarm condition occurs, sudible and visual alarms are presented at
the freezer, and an alarm window appears on the PC screen. The window
contains a list of up to three of the most recent alarms and the message
'Click Here To Silence'. Click anywhere on the alarm window to silence
the audible alarm at the freezer. After the audible alarm is silenced, another
alarm window appears, showing the list of up to three most recent alarm
and the message 'Click Here To Clear'. Click anywhere on the alarm
window to clear all alarms whose conditions have been resolved.
The alarm window reappears if any alarms are still active. Correct these
conditions and click anywhere on the alarm window to clear these alarms.
If the message 'Profile Stopped At Freezer' displays, the run has been
stopped by a component failure in the freezer, or by the user pressing the
Back button at the freezer while the profile is in the End step. Click on the
message to acknowledge that the run was stopped. This action has the
same effect as clicking the Stop button.
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