Category: ABB

Historical data

The NGC8209 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 NGC8209 can be collected via a remote

communication link or by the laptop PC local operator

interface PCCU 32.

Description

The truck is moved as close to the sample point as is practical.

A flexible sample line is then uncoiled and attached to the probe

in the flowing natural gas pipeline. If the dew point of the gas or

the weather demands it, this flexible tubing must be heated. A

sample of the gas is extracted from the probe in the line, purged

through the flexible line and then transported to the analyzer.

There it is processed for particle removal and phase integrity,

injected onto the chromatographic columns where component

separation occurs. These components are then quantified by

peak integration and concentration is calculated. The other data

of interest is then calculated from these concentrations.

The Portable NGC8209 analyzes each sample utilizing

established chromatographic techniques. The resulting

information consists of mole percent values for the following:

– Air (Contains N2, Ar, CO and O2 but not CO2), C1, CO2, C2,

C3, IC4, NC4, NeoC5, IC5, NC5, C6’s, C7’s, C8’s, C9+

The NGC8209 measures a C9+ (back flushed) peak. Users may

input the results of a comprehensive lab analysis that reflects

the split or ratio of C9 through C12 components. This ratio can

be used in subsequent analyses and energy calculations.

Calculated values include

– Relative density (specific gravity)

– Btu/CV (heating) value

– GPM (gallons of liquid per thousand cubic feet)

– Wobbe index

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

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

• Auto-start cycle automatically after power failure:

◊ Stabilizes oven temperature

◊ Confirms modules’ functions

◊ Checks for operational alarms

◊ Returns to pipeline streams

• Operational alarms available with each analysis cycle.

• 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

• Continuous monitoring for alarms

STANDARD OPTIONS

• H2S measurement from 0.02% and higher

• Sample Conditioning Modules

• On board digital 1/4 VGA display with multiple

screen access

• 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

STANDARD FEATURES

• Modular design includes:

• Three analysis trains, two for N2 through C6+

and one for the C6 through C9+

• Modular software – application based plug-in

software modules

• Manifold modules

• 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® 2000 or XP based

man-machine interface software (PCCU_NGC)

• Lithium battery-backed RAM

• Two remote serial digital communications ports;

one local port (USB Client)

• One USB Host and one Ethernet port

• Comprehensive diagnostics and wizards

available to users

• Three-level security for user access control

(Read only, Operate and Read/Write)

• Audit-quality historical data; date and time stamped

• Standard Calculations; US and SI:

◊ Heating value

◊ Relative density

◊ GPM

◊ Wobbe

◊ Methane-number

Hydrocarbon Dew

Point (HCDP) and Speed of Sound (SOS)

calculations are available options. A single computer

controller seamlessly processes all this data for

various outputs. It also handles the stream switching

and the timing for the sample.

Incorporating a state-of-the-art built-in 32 bit digital

controller, three electronic carrier pressure

regulators, oven-mounted sensors and advanced

low-noise digital electronics, the NGC 8209 performs

with unparalleled repeatability and sensitivity.

The NGC 8209 provides custody transfer/metrology

quality Chromatography for heating value and

composition measurement. It provides the user with

a GC that is lower in cost, easier to install and

commission, and less costly to operate. 

BENEFITS

The NGC 8209, the C9+ Natural Gas Chromatograph

performs on-site natural gas analysis and heating

value computation using an extended analysis.

On-line chromatograph techniques are used to

provide N2 through C6+ data while a third column

train is used to separate the C6+ fraction. The NGC

8209 utilizes the modular and scaleable XSeries

software framework to integrate data from a third

analysis train into the standard C6+ analysis of the

Natural Gas. The extra chromatographic information

is provided as NC6’s, NC7’s, NC8’s and C9+ to

provide this “extended analysis”. Heating value (CV),

Wobbe, Relative Density (SG) and other calculations

are performed using the combined analysis data in a

similar manner to the NGC 8206. 

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

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.