Items on the meter data editor: Meter Reading tab

Host Date Time

The date/time stamp for the start of the flow period. The time zone is either host or field, based on User Options window: System Preferences tab. Whether you have selected the time zone for the host or the field dictates the time information that will be displayed in the Meter Data Editor window. For example, if it is 09:00 A.M. in the field time zone but 08:00 A.M. in the host time zone and Host is selected as the chosen time zone, the times displayed will reflect that of the host time zone. In instances where there is a discrepancy brought on by the fact that the chosen time zone does not observe daylight savings, AVEVA Measurement Advisor will account for that in the time zone conversion process.

The date/time can be colored to indicate that an Audit History or an outstanding Prior Period Adjustment (PPA) record exists. Double-click the colored date/time to access the Audit History window or the Pending PPAs window.

Host End Date Time (irregular data only)

The date/time stamp for the end of the flow period.

When data is being changed, this column shows the (…). Select (…) to access the Set Adjustment Reason window.

C

Configuration change

An icon indicates that the configuration has changed at this time. Double-click the icon to access the Configuration tab for the proper date/time.

E

Event/Alarm

An icon indicates that an alarm/event record was generated at that time. Double-click the icon to access the Event tab for the proper date/time.

MQ

Measured Gas Quality

An icon indicates that a different measured gas analysis record is in effect for that time period. Double-click the icon to access the Measured Analysis tab to look at the data.

• A green icon indicates that it is currently being used.

• A gray icon indicates that the MQ is not being used for this meter.

• If the Gas Quality is using a backup GQ, the icon will be blue.

ZQ

Zone Gas Quality

An icon indicates that a zone gas analysis record exists for that time.

Double-click the icon to access the Zone Analysis tab to look at the data.

If the Gas Quality is using a backup GQ, the icon will be blue.

If the meter is configured with the Host gas quality (GQ) Calculation policy set to calculate the Default Effective GQ, the zone quality (ZQ) will be gray and the measured quality (MQ) will be green. The ZQ (gray) is only to be used when there is no MQ (green).

If the meter is configured with the Host GQ Calculation policy set to calculate the Last Effective ZQ, the ZQ will be green and the MQ will be gray. The MQ (gray) is only to be used when there is no ZQ (green).

Only valid GQs are displayed in the ZQ column in the Meter Data Editor. GQ information that is invalid is not used to perform calculations.

If the meter is configured with the Host GQ Calculation policy set to calculate the Last Downloaded ZQ, the ZQ will be green if the ZQ row is downloaded to RealTime and yellow if it has not been downloaded to RealTime. In this situation, the MQ (gray) will always be gray. The MQ (gray) is only to be used when there is no ZQ (green or yellow).

M

Modified

Indicates whether the data has been modified during the current editing session:

• Gray. The data was not edited, or the data was edited and has been successfully saved.

• Colored. At least one data box in the row is not valid. The color is selected (Invalid Data) through User Options window: System Preferences tab.

  Note: If all data cells in a row are black, the data is valid. One or more colored data cells indicate a problematic row, with the coloring of each cell indicating the data quality of the cell.

  C. The data is considered to be closed. Any edits will be marked as PPA. Double-click C to access the Close Group Summary window.

  Y. The data has been edited (but not saved). Double-clicking Y will open the Problems tab on the Meter Data Editor window.

Observed

This column indicates whether the data has been observed (measured in the field) or calculated from other values. This column is only available for editing when the rows are newly inserted.

Volume

This column displays the volume.

Energy

This column displays the energy.

HV

This column displays heating value information.

Flow Time

This column displays the flow time. The flow time is the amount of time that the gas was flowing through the meter during the time period represented by the data row.

Press.

This column displays the recorded pressure.

Temp.

This column displays the recorded temperature.

Diff. Pressure

This column displays the differential pressure. Differential pressure is the measured pressure drop across an orifice place or other device as the gas moves down the pipe.

Flow Ext.

This column displays the orifice meter flow extension information.

C' Factor

This column displays the C' factor, which corrects the superficial gas velocity for vapor and liquid densities.

WVCF

This column displays the water vapor correction factor.

Volume Accum

This column displays the accumulated volume value.

Energy Accum

This column displays the accumulated energy value.

Misc Value

This column allows you to enter values that are not pre-defined by the application. If the Misc Value is being used in conjunction with a Linepack Meter, however, the value will provide the outlet temperature.

Volume Ratio

This column displays the ratio of system-calculated volume to volume received from the field.

Run Time

This column provides the amount of time represented by the data row.

Mass

This column displays the mass.

Note: In cases where Mass is entered for a mass liquid meter, the Volume will be calculated. Mass liquid meters either have a Data Source of Liquid Mass (for Manual Meters) or a Volumetric Calculation type of API 14.4 (used in conjunction with Orifice, Pulse, or Corrector meters)

Z Ratio

When converting a volume from one base conditions to another, the ideal gas law is used (PV = nRT). AVEVA Measurement Advisor gives the option to configure a single alternate set of base conditions that will use the real gas law for the conversion instead (PV = ZnRT). When this is configured, the Z ratio is calculated as the compressibility factor to convert between the specified base conditions and the standard base conditions (14.73 PSI/60ºF). The Z ratio is considered unitless.

HDP

This column displays the hydrocarbon dewpoint temperature.

Uncorrected Volume

This column displays the uncorrected volume.

Last Mod Time

This column indicates the time when the property was last modified.

Last Mod User

The column indicates the last user to modify the listed object.

Press. Setting

This column indicates the pressure setting that is in use.

Atmos. Press.

This column displays the atmospheric pressure.

Chart Label ID

This column displays the label ID on the chart used to gather information. This is only used for data with a Daily granularity.

Edit State

The Edit State provides the current state of the information:

• An Edit State of Observed indicates that the data has been measured in the field. When data is being entered for the first time, select the Observed checkbox.

• If the Observed checkbox is not selected, the data will be given an Edit State of User Estimated. This means that data from the field is not available. The values that appear should be considered temporary data, to be used only until the real data arrives.

• If Observed Accepted Edit State is applied to a rejected reading, the checks performed to ensure that the data is neither too old or recorded for a date in the future will not occur. Additionally, an Edit State of Observed Accepted allows observed data to be loaded into the system when the data is edited or manually overridden. At this point, a record of the changes will be stored in the Audit History, and the Observed data will be brought into the system.

• Edited indicates that there have been changes to the data. However, this edit state does not account for the values accounted for by the Manual Override state.

• Manual Override indicates that you have overridden fields that are normally calculated, such as Volume, Energy, Mass, Specific Gravity, Heating Value Ideal, Specific Gravity Ideal, and Heating Value.

• System Estimate indicates that the data did not exist in the system, so the system provided an estimate.

• Actualized indicates that you have accepted the data. In the event that new telemetered information comes in, the system will not overwrite the Actualized data.

  For more information, refer to About the edit state.

Energy Edit State

This column indicates the action that created the energy data. For example, this might be a user estimate, a system estimate, or it may be observational data.

Data Quality

The quality status of the data. This could be one of the following:

• Unassigned

• Missing

• Late

• Late Estimated

• Commissioning

• Valid

• Accepted

• Flagged

• Ignored

Process State

This column indicates whether the data is being processed. It is also used to display problems associated with the processing of the data.

Water Vapor Calc.

This column displays the water vapor calculation information.

WVCF Apply To

This column displays the object that the Water Vapor Correction Factor (WVCF) applies to.

Raw Value Acc

This column displays the raw value accumulation.