Taylor-Wharton CS Series - Manual (Page 35)

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CS SERIES
Logging
On board memory logging function is one of the most powerful and useful features
of the CS SERIES Control System control. It provides a historical record for not only
your freezer but also a complete record of the environment in which specimens were
stored. Four separate logs are kept in the control:
1. System log – System logs are events that occur in the system including lid
opening/closing, LN
2
filling, Quick-Chill, Defog.
2. Error log – Error logs are outside the activated preset limits detected by the
system.
3. Temperature #1 log and Temperature #2 log (for use with optional thermocouple
#2) – The two temperature logs are simply records of the temperatures recorded by
the two thermocouples in the system.
The system and the error log each hold 4096 events while the combined
temperature logs hold an additional 32,768 temperature events. All the logs are
kept in non-volatile memory, meaning that the information is saved regardless of
whether the control has power.
When an event (system, error or temperature) occurs, the control does two things
with the data:
1. It enters the beginning or the conclusion of an event in the internal memory of
the controller.
2. It sends the event data out the serial port of the freezer.
The control consolidates the events in the internal log (combining “start event” /
”conclude event” information to provide one event with duration), however, when
the data is sent out the serial port no consolidation of data occurs.
As an example, a fill would provide one log entry in the internal log of the control,
indicated as follows:
Fill occurred on 01/07/2012 @ 8:07 for 24 minutes. The
same data coming out of the serial port would cause two entries in a computer or
printer and would be indicated as follows:
Fill Started on 01/07/12 @ 8:07
… (elapsed time)
Fill occurred on 01/07/12 @ 8:07 for 24 minutes
Menu Access causes the control to make some decisions on logging an event and
they are handled in the following manner: Temperature is immediately logged (if it
is enabled) and then a fresh time period is started when the Menu system is exited.
System and error logs are placed in a suspended state until the control exits the
menu system and timing is started again. Duration of system and error logs then are
total time of the event less any time that the user was in the menu system.
When logs are dumped to the serial port, the oldest events are sent first. The control
operates on the FIFO (First In First Out) method. If the maximum number of entries
is reached, the oldest are lost to make way for the newest entries.
Dump Logs
DUMP SYSTEM LOGS is accessible through the menu system of the control. This
option sends data from the system logs out the serial port of the freezer. When
this option is chosen, the display reports how many system logs are stored. While
the data is being sent to the serial port, it can be paused or completely cancelled
through the menu system.