Thermo Scientific 7450, Operating And Maintenance Manual

Page: 101 / 120

• ‘Cannot Stop Freezer in Stand-alone Mode’
This message displays if the Stop button is clicked while the freezer is
running a Remote profile in ‘Stand-alone’ mode. Clicking the Stop
button at this time stops only the data capture. Choose ‘Continue
capturing data’ or ‘Stop capturing data’. No other commands can be
sent from the PC.
Three modes are available when using a Controlled Rate Freezer and PC
configuration: Remote Mode, Stand Alone Mode and Running a Local
Profile.
The PC can initiate all actions at the freezer such as Run, Stop, Warm,
Manual Over-ride, Alarm Silence and Alarm Clear. The PC displays the
current freezer operation status (Idle, Run, Wait, End, Warm) and the
chamber and sample temperatures. Time and temperature details are
captured every 6 seconds.
The CRF keypad is disabled except for the Silence key which can be used
to silence the audible alarm and clear alarm messages at the freezer. Alarm
messages on the PC must be cleared at the PC as an added assurance that
the PC user will be aware of the alarm condition. The other freezer keypad
keys are disabled to prevent persons near the freezer from taking control of
a freezing run without the knowledge of the user/initiator of the run. All
freezer status and temperature displays operate normally. The message
'Under Remote Control' displays on the freezer as well as the current
profile step being executed. Alarm messages alternate with the current step
information if an alarm condition occurs.
10-18 7007452 CryoMed Freezer Thermo Scientific
Section 10
PC Interface Software
Error Messages
(continued)
Display/Control
Summary
Remote Mode