Thermo Scientific AutoXP, Manual

Page: 103 / 131

Thermo Fisher Scientific AutoXP Users Guide 5-5
Functional Description
Historical Data
The unit keeps historical logs for all meter run data as well as audit/alarm
(event) logs for each meter run configured. For each meter run, the system
defaults include:

Hourly logs: storage for 840 hourly records (35 days)

Daily logs: storage for 65 records

Events: storage for the last 200 events
The data stored in these logs is configurable. AutoCONFIG Table #226 is
reserved for DP flow calculations, and Table #227 is reserved for AGA 7
flow calculations. The structure for both tables is shown below.
Table 5–1. Structure of historical data log for DP and AGA 7 flow calculations
Field Type I Description
1 Byte I History Log Item #1 Index
2 Byte I History Log Item #2 Index
3 Byte I History Log Item #3 Index
: : : :
: : : :
36 Byte I History Log Item #36 Index
History log index definitions for DP flow calculations are listed in the
following table. Items with non-zero indices will be included in the log in
the order specified.
Table 5–2. DP flow calculation history log index definitions
History Log Index Definition
0 Undefined
1 Pipe Diameter (Snapshot)
2 Orifice Diameter (Snapshot)
3 Atmospheric Pressure (Snapshot)
4 Pressure Base (Snapshot)
5 Temperature Base (Snapshot)
6 Average Differential Pressure
7 Average Static Pressure
8 Average Gas Temperature
9 Flow Status (Snapshot)
10 Accumulated Volume (Current Log Period)