3410 Series Gas Ultrasonic Meters Operations Manual Section 6: Archive logs
3-9000-777 Rev E January 2018
Daily and hourly log data point actions 87
61:
Section 6: Archive logs
The Daniel 3410 Series Gas Ultrasonic Flow Meters provides five types of data logs (daily, hourly,
audit, alarm, and system logs).
Each log type is discussed in detail below followed by Daniel MeterLink
instructions to read (and
optionally save) meter log records (“Options for reading daily and/or hourly log records”).
6.1 Daily and hourly log data point actions
Five different log data point actions are supported by the daily and hourly logs: snapshot,
average, flow-gated (average), totalize, and macro as described below:
• S
NAPSHOT: causes the data point’s value at the log time to be recorded.
• A
VERAGE: causes the data point’s average value over the log interval (day or hour) to be
recorded.
• F
LOW-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.
• T
OTALIZE: causes the data point’s accumulated value over the log interval (day or hour) to
be recorded.
• M
ACRO: 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 a FALSE value is
represented by a 0). This allows a group of boolean data points to be grouped into a single
integer value where each bit represents the latched value of a single boolean data point.
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