ABB Portable NGC Natural gas chromatograph Historical data

Historical data

The Portable NGC is designed to retain historical data. This

data can be used for custody transfer needs, verify

transmitter operation over time, and provide a limited data

backup for communication link reliability.

In addition, various CSV file outputs are available to download

the analysis data into spreadsheet based company specific

data sheets, and outputs to 3rd party gas accounting

packages.

The default¹ memory configuration provides the most recent

480 analysis cycles containing:

• Normalized components

• Un-normalized components

• Ideal Btu/CV

• Real Btu (wet and dry) / CV (superior and inferior)

• Relative density (specific gravity)

• Density

• GPM

• Wobbe index

• Alarms

Stream averages for the (default¹) 840 last hours, 35 last days

and the most recent last month analyses. Operational

Parameters for the (default¹) last 480 cycles (Diagnostics Report):

• Selected peak times

• Selected peak areas

• Ideal Btu/CV

• Carrier regulator pressure

• Oven temperature

• Ambient temperature

• Sample pressure

• Detector noise values

• Detector balance values

Audit logs (default¹)

• Last 480 alarms

• Last 480 events

Data retained by the Portable NGC can be collected via a

remote communication link or by the laptop PC local operator

interface PCCU 32.