Rockwell Automation 1758-RTU202 DataSite Hardware User Manual - Manual (Page 66)

Publication 1758-UM001D-EN-P - June 2011
66 Specifications
Flow Measurement
Parameters
The flow measurement specifications apply to 1758-FLO DataSite controllers
only.
Flow Measurement Specifications (for 1758-FLO controllers only)
Attribute Value
Meter channels 1…8 channels
Meter algorithm AGA3/AGA7 are optional. The default is AGA3.
Compressibility factor calculation using AGA8.
Clock Accuracy 0.08s/24h, support calibration
Operation With the software tools, DS FloConfig and DS DNP3.
Secuity of the system With special license code for flow computer controller and
password for parameters modification.
Data acquisition cycle Acquisition cycle of AI-channel is 100 ms. For DI and PI
channels, it is 10 ms.
Flow calculation cycle 1 s
Base conditions User can change the base conditions.
Compressibility factor
calculation Three methods of AGA8 optional: Gas analysis, HV-GR-CO2,
GR-CO2-N2
Pressure tap location Support flange upstream and downstream tap pressure
Transient flow calculation Supports transient volume hour flow rate calculation in base
conditions and flowing conditions. Supports mass flow rate
calculation. Supports low or zero flow cutoff.
Flow transaction records Store the hourly and daily historical transaction records
during 35 days. If parameters are changed, a new hourly and
daily record will be logged.
Event records 700 event records
Alarm records 300 alarm records
Accumulative total Long integer
Overall accuracy ±0.2% F.S.