Calibrations in the Controller vs. StackVision

Setting up a new calibration can be tricky. How many times have you created a calibration that runs perfectly in the data controller, but either does not poll into CalLab or comes in with a different error calculation or passing criteria? This scenario will occur when there is a discrepancy between what is configured for the calibration sequence and what is configured in the parameter’s Calibration Settings.

While the logger will use the error limits specified in the Calibration Sequences section of StackStudio, StackVision will use the Calibration Settings in the Parameters section of StackStudio when showing data in CalLab or the Calibration Detail report.

 

Calibration Settings:

Calibrated?: Indicates that the parameter is calibrated and calibration data is polled. Only parameters with this field enabled are included in the Calibration Detail Report and CalLab.

Instrument Span Value: The instrument’s span value, used in standard (also called percentage based) calibration error calculation. This value MUST be non-blank and downloaded to the controller if using standard calibration error calculations or else the calibration will fail.

Span Scale Type: Used to indicate if the range of the instrument is low or high scale. Valid values for this field are L, H and blank. If a unit or stack only requires monitors which measure at a single instrument range, this field should contain an H or be left blank.

Calibration Point (Low): Lowest point calibration phase number used for calibration error checking. Used in conjunction with the Phase Type on the Calibration Sequences editor (Plant > Data Controller > Calibrations > Sequences). Data from the calibration phase type that matches the Calibration Point (Low) is reported as the zero phase of the calibration in the Calibration Detail Report. Typically, this value will be set to ‘0’ to mirror the phase type of the zero calibration.

Calibration Point (Mid): Mid-point calibration phase number used for calibration error checking. Used in conjunction with the Phase Type on the Calibration Sequences editor (Plant > Data Controller > Calibrations > Sequences). Data from the calibration phase type that matches the Calibration Point (Mid) is reported as the span phase of the calibration in the Calibration Detail Report. This field is only used if you use the mid-range gas as the span level in your calibrations.

Calibration Point (High): Highest point calibration phase numbers used for calibration error checking. Used in conjunction with the Phase Type on the Calibration Sequences editor (Plant > Data Controller > Calibrations > Sequences). Data from the calibration phase type that matches the Calibration Point (High) is reported as the span phase of the calibration in the Calibration Detail Report. Typically, this value will be set to ‘1’ to mirror the phase type of the span calibration.

Primary Calibration Error Calculation Type: The initial error method used for calculating calibration error. The calibration error types are:

Primary Out of Control Error Limit: The out of control limit for the primary calibration error method. This is currently unused by StackStudio, but is often set equal to the OOC limit of the calibration.

Primary Maintenance Error Limit: The maintenance limit for the primary calibration error method. Typically, half of the out of control limit. In general, this field should match the maintenance limit of the calibration.

Error Decimal Positioner: The number of places after the decimal to display and report the calculated calibration error. Note that the calibration within the logger will use the value specified in the ‘Decimal Positioner’ field in the Base Settings of the Calibration tab. The Error Decimal Positioner is only what is represented in CalLab and the Calibration Detail report.

Default Calibration Allowed Limit: The out-of-control limit calibration error calculations. This field is present for backward compatibility and is generally set equal to the OOC limit on the calibration.

Offline Calibrated for Part 75?: Indicates if the parameter has passed the offline calibration demonstration and can use offline calibrations for Part 75 validation.

CHKOOC60 Target Parameter: The merge (channel) parameter to mark as out of control (OOC) when the low or high range calibrated channel is OOC, for a dual range analyzer configuration using Part 60 OOC rules.(Optional)
 

For help setting up new calibrations, contact the ESC support team.
 512-250-7901  •  support@envirosys.com

Does your system need updates? Call ESC Sales and ask about our DAS Evolution two day onsite!
512-250-7902  •  sales@envirosys.com

 

 

Clint Anderson, System Implementation Engineer, ESC    Published: 3/15/2017 2:58:25 PM

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