5.8 Internal logs
The
Sentinel LCT8
tracks all changes to the programming,
meter status (power on, power off), error status, date/time
changes, etc., and stores the information in the internal
audit or error logs.
5.8.1 Audit logs
The
Sentinel LCT8
audit log
records system activity to a
user-readable log file and stores it in persistent memory.
5.8.1.1 The audit log file
The meter can store up to 1000 event records in the
audit log
file. When the file size reaches this limit, any new record will
overwrite the oldest existing record in the file. This is called
a
circular log
, and it ensures that the user is always viewing
the 1000 most recent event records.
The
activity types that generate an audit log log file record
are listed in
Table 14 on page 103below .
The audit log file is not viewable on the
Sentinel LCT8
display, and the contents of the file stored in the meter’s
memory cannot be altered. However, the audit log file can
be downloaded to a PC using the Panametrics PanaView
SEN898 software. Once saved to a PC, the audit log file may
be opened as a text file that includes the details listed in
Table 15
below in each record.
Table 14: Activity types recorded in the audit log file
Activity type
Description
Power on/reset
The
audit log
file can be used to determine the meter start or reset time.
The meter
power-on
is usually the first entry in the audit log file, unless the entry was
overwritten, which occurs after 1000 events have been recorded.
Parameter change
The meter monitors all parameters that may have an impact on the flow rate measurement
and records changes to those parameters in the
audit log
file.
Alarms
When an alarm trips, the event is recorded in the
audit log
file.
Calibration change
As the user needs to be aware of any meter calibration changes, all such events are recorded
in the
audit log
file. For example, an option card change might affect the meter calibration,
in which case a record is created.
Default meter
When a user intentionally defaults the meter or a software corruption causes the meter
parameters to be defaulted, the event is recorded in the
audit log
file.
Save/store/delete site file
When a user saves, restores, or deletes a site file, the event is recorded in the
audit log
file.
Upgrade meter
When the meter firmware is updated to a different version, the event is recorded in the
audit log
file.
Table 15: Information included in each audit log record
Item
Description
Rec#
The event/record
number
(1-1000)
Date
The
date
the event occurred (mm/dd/yyyy)
Time
The
time
the event occurred (hh:mm:ss)
Source
The
channel
on which the event occurred, including the meter or I/O source
ID
The parameter
ID
of the value that changed
Name
The
name
of the event
Auth
The
security level
at the time of the event
Old
The original value of the
parameter
(
NOTE:
Some events may not have an entry in this column,
such as alarms being tripped or power events.)
New
The new value of the
parameter
(
NOTE:
This includes meter events, such as alarms being
tripped or power events which have no previous values.)
103
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