Panametrics TMO2D, User Manual, Page: 61 / 101

TMO2D User’s Manual 53
Chapter 4. Basic Programming
4.9 The System Log Menu
The TMO2D maintains a System Log in battery-backed memory. Among other things, this log indicates the nature of
any fault signaled by the fault alarm relay by recording the type, date, and time of the relevant events.
The System Log can record up to 25 events of the following types:
• factory initialization
• system power on
• system RESET
• RAM checksum failure (memory corruption)
• Transmitter cell under range
• Transmitter cell over range
• no calibration curve
• return to normal operation
• AutoCal Tot drift error
• AutoCal Drift/Cal error
Note: Testing the fault alarm does not appear in the System Log.
The TMO2D stores only the 25 most recent events in its memory. When additional events occur, the TMO2D discards
the oldest event from the log to make room for the new event. Refer to Figure 29 on page 85, for a flow diagram of the
System Log menu.