About items on the Gas quality tab

Gas Quality

Name

The name of the gas quality record.

Names can be up to 31 characters long.

Description

The description of the gas quality record.

Organization Aliases

Organizations with alternate names (aliases) for this gas quality.

Input Unit Profile

Unit profile with the units of the incoming data.

Output Unit Profile

Unit profile with the units used for reporting and billing.

Measurement Points

Associated Measurement Point name.

Remote

Remote connectivity.

AOR Group

The name of the AOR group.

Dataset

The dataset that is assigned to the object.

Backup GQ

Define a Backup GQ to use the gas analysis data at the backup GQ for a defined period of time.

Gas Quality General

Analysis point type

The analysis point type. Can be one of the following:

• Zone — The source of the analysis is a Chromatograph, which can be downloaded to the RTU.

• Measured — The source of the Analysis is an RTU calculated meter run, which is used for recalculations only.

Analysis product type

The product type. Can be one of the following:

• Liquid analysis

• Gas analysis

Analysis source

Provides the source of the Gas Quality information.

Field device local timezone

The time zone in which the field device collecting the metering data is located.

Field device contract hour

The contract hour of the field device. The Field Device Contract Hour can be used to timestamp the daily aggregated rows with the contract hour and time zone used by the field device.

If CD_FIELD_DEVICE_AGGREGATES is set to Y in the configDesc table, the contract hour and time zone will be supplied by the field.

Official contract hour

The Official contract hour can be used to timestamp the daily aggregated rows with the official contract hour in the system's time zone, as opposed to using the contract hour and time zone supplied by the field.

The system's time zone is set in the configDesc table, in CD_CONTRACT_TIMEZONE_CODE.

If the customer wishes to use the Official contract hour according to the system time (using the time zone entered in CD_CONTRACT_TIMEZONE_CODE), as opposed to the information supplied by the field, they need to set CD_FIELD_DEVICE_AGGREGATES to N in the configDesc table.

Alternate contract hour

This allows the customer to supply an Alternate contract hour.

Note: The Alternate contract hour is not used for any data processing. It is purely informational.

Thermal calculation

Provides the Thermal Calculation method selected for use with the Gas Quality record. Options are as follows:

• AGA-5

• GPA-2145

• GPA-2145-00

• GPA-2145-03

• GPA-2145-09

Dry threshold

Define a water vapour content threshold below which the value would be considered dry.

Compressibility calculation

Compressibility calculation to use for heating value determination.

Subtract dry threshold from H2O

Subtract dry threshold from water content when calculating the water vapour factor.

Density reference temperature

Base temperature for compressibility calculations.

Density reference pressure

Base pressure for compressibility calculations.

Normalize manual entry

Select to enable the normalization dialog in the Gas Quality Data Editor.

Normalize telemetered data

Select to automatically normalize telemetered data in the reading manager if it is within one percent.

Telemetry calculation policy

Defines the recalculation policy for the heating value, specific gravity, and cricondentherm (if the hydrocarbon dewpoint module is installed) when the data is received by the system. The choices are as follows:

• None

• Calculate Specific Gravity

• Calculate Heating Value

• Calculate SG/HV

• Calc HV, SG and Cricondentherm

• Calc SG and Cricondentherm

• Calc HV and Cricondentherm

• Calc Cricondentherm

Available to RealTime apps?

Is this gas analysis point required by AVEVA Enterprise SCADA applications?

Send to GDO?

Send gas quality data to AVEVA Gas Day Advisor .

Hydrocarbon dewpoint calculation

VMGThermo is not available for hydrocarbon dewpoint calculations. Only the GERG-08 calculation of the National Institute of Standards and Technology's Reference Fluid Thermodynamic and Transport Properties Database (NIST REFPROP) is supported.

For more information on configuring the hydrocarbon dewpoint calculation method, refer to the AVEVA Measurement Advisor Installer documentation.

Auto update config

Select to automatically update host configuration from the RTU.

Enable editor cricondentherm cal

Enable the calculation of cricondentherm from within the Gas Quality Data Editor.

Gas Quality History

Primary history granularity

Defines the granularity at which the data is received from the field device. The choices are as follows:

• Hourly

• Daily

• Sampled

Reject non-primary granularity

Reject all data for this gas quality that is not in the primary history granularity.

Enable Daily Averages

To enable Gas Quality (GQ) Averaging, select Enable Daily Averages. For more information, refer to Gas Quality (GQ) Averaging.

Minimum Hours for Average

Define the minimum hours required for the average to be considered valid.

Sampled Gas Quality

Sampling Organization

The organization that is taking the sample.

Analyzing Organization

The organization that is analyzing the sample.

Receiving Organization

The organization that is receiving the sample.

Sample Time Adjustment

Use to configure how the sample time information is adjusted when the sampled data is received by the system.

Note: The desired Sampled Time Adjustment must be defined before the data is received. The adjustment will not be applied after the system has received the data.

There are four options:

• None — No time adjustment.

• Current Gas Day — Uses the field contract datetime of the current gas day.

• Next Gas Day — Uses the field contract datetime of the next gas day.

• Nearest Gas Day — Uses the field contract datetime of the nearest gas day.

Analysis component spreading

Cx plus Type

Define the Cx Plus Type to be used.

Spread Cplus

Should the Measurement Calculation Library spread Cplus to the appropriate components?

C6 Spread Weight

If spreading has been enabled, what weight should C6 use? This requires of a minimum value of 0 and a maximum value of 1.

C7 Spread Weight

If spreading has been enabled, what weight should C7 use? This requires of a minimum value of 0 and a maximum value of 1.

C8 Spread Weight

If spreading has been enabled, what weight should C8 use? This requires of a minimum value of 0 and a maximum value of 1.

C9 Spread Weight

If spreading has been enabled, what weight should C9 use? This requires of a minimum value of 0 and a maximum value of 1.

C10 Spread Weight

If spreading has been enabled, what weight should C10 use? This requires of a minimum value of 0 and a maximum value of 1.

GQ Missing Data Check

Enable

Enables missing data detection for this gas quality.

GQ Late Data Check

Enable

Enables late data detection for this gas quality.

Analysis frequency

the frequency at which the data is expected to arrive.

Maximum estimations

In the Maximum Estimations field, enter the maximum number of estimations that should take place as a result of this check. For more information, refer to Define the maximum number of estimations associated with a Late Data Check

GQ Estimation Connectivity

Data estimation granularity

Define the granularity for data estimation. You can use a different granularity than the defined primary history granularity.

Data estimation type

Assign a GQ Estimation Profile. The GQ Estimation Profile determines the method used to created the estimated data.

The GQ Estimation Profile must be created in the GQ Estimation Summary window before they appear in the GQ Estimation connectivity window. For more information, refer to Create a new gas quality (GQ) estimation profile.

Missing Data Poll

Enable

Select to enable the missing data poll.

Field Device Buffer (days)

Define the amount of data the field device contains (measured in days).

Poll Delay (hours)

Amount of time to wait before considering the data missing.

Field Device Installation Time

The time the device was installed This should be recorded in the field timezone.