Technical data

5 Archive logs and reports
Topics covered in this chapter:
• Archive logs and reports
• Event log: alarm/audit
• Collecting and viewing log records
• Collecting maintenance logs
• Collecting trend maintenance logs
• Collecting meter archive logs
5.1 Archive logs and reports
5.1.1 Archive logs types
Daniel 3810 Series Liquid Ultrasonic Flow Meters provides five types of archive data logs
which you can read and optionally save.
• daily logs
• hourly logs
• audit logs
• alarm logs
• system logs
5.1.2 Daily and hourly log data point actions
Five different log data point actions are supported by the daily and hourly logs.
• Snapshot: causes the data point’s value at the log time to be recorded.
• Average: causes the data point’s average value over the log interval (day or hour) to
be recorded.
• Flow-Gated: causes the data point’s flow-gated average value over the log interval
(day or hour) to be recorded. A point’s flow-gated average is the average of its
values when the flow is above the low-flow cut-off. If the flow does not exceed the
cut-off during the interval, then the data point’s flow-gated average is the same as
its regular (non-flow gated) average.
• Totalize: causes the data point’s accumulated value over the log interval (day or
hour) to be recorded.
• Macro: causes the (boolean) data point’s ‘latched’ value over the log interval (day or
hour) to be recorded. A (boolean) data point’s latched value indicates if the point
was ever TRUE during the log interval (where a TRUE value is represented by a 1 and
Archive logs and reports
Operations 61