ABB Portable NGC8209 Natural gas chromatograph Introduction

Introduction

The Portable NGC8209 is a natural gas chromatograph

designed for installation in a vehicle, allowing it to be used

for real-time analysis on any site that can be driven to.

The NGC is easily powered, either from the vehicle’s 12Vdc

system or from a 110VAC inverter. Its low power operation

means you can maintain continuous power on the unit, thus

keeping it at operating temperature and assuring it is ready

for immediate use on site.

From the spot analysis the following are calculated:

– Relative density

– Heating value

– VOS (velocity of sound)

– GPM (gallons of liquid per thousand cubic feet)

– Wobbe index

This data can be used for flow computers, RTU’s, gas

accounting systems, and SCADA systems for the Energy,

AGA3, 7, 8 and 10 calculations t the meter site. This data

output can be a CSV file format so that analysis data systems

can easily incorporate the information. The number of runs

and the number of averages can be selected. The averaged

output can be formatted to be accepted by a 3rd party gas

accounting software system, allowing automatic downloads

of the analysis data. Analysis done on site is valuable because:

– Transportation of DOT regulated gas cylinders is avoided

– Time and cost of subsequent laboratory analysis

– Problems with sample handling

– Economic solution for gas quality measurement when the

gas volumes are too low to justify on-line chromatography

Standard features

Modular design includes

– Portable GC interface allows user analysis customization

– Modular software – application based plug in software

modules

– Manifold module (internal tubing now replaced by manifold)

– Analysis sections contain stream selection solenoids,

temperature and pressure regulation, 32 bit digital detector

electronics, replaceable column / valve modules and a low

power 32 bit digital controller, using Windows CE® (internal

to GC unit)

– Microsoft® Windows® based man-machine interface

software (PCCU)

– USB MMI port connectivity

– Ethernet connectivity

– Lithium battery-backed RAM

– Two remote serial digital communications ports; one local port

– Comprehensive diagnostics and wizards available to users

– Audit-quality historical data; date and time stamped

– Operational fault/warn alarms available

– Detectors - constant temperature, glass encapsulated

thermister beads for rugged service and long life; will not

burn out on loss of carrier

– 10 port valves have no moving metal parts in each

analysis unit

– Low utility usage - low-power, low-carrier, no instrument air

required

– On demand or scheduled automatic calibration and

diagnostics

• Calculation packages (eg, Hydrocarbon Dew

point via SRK and Peng-Robinson, including: 4

pressures and the Cricondentherm)

• Integral gas flow tube calculations (e.g. Orifice or

turbine meter calculations)

• SD memory cards for raw chromatogram storage

• Feed-Through heater for colder operations or

high dew point gas sampling