QA - Zero Span¶
Zero and Span are two different measurements that are quality control checks.
The zero check is a challenge of the instruments zero calibration conducted by introducing zero air into the analyzer and measuring the instrument response.
The span check is a challenge of the upper limit of the analyzers calibration conducted by introducing a calibration gas (approximately 80% of the operating range) into the analyzer.
Examples:
QA|I|Zero Span|905|TT|905|9009|42101|1|20200107|1|588|008|12|621|671||
Format¶
Seq. |
Name |
Description |
Formatting Rules |
Required |
Key |
---|---|---|---|---|---|
1 |
Indicator for Insert, Update, or Delete action. |
Must = I, U, or D |
Always |
||
3 |
Indicates the specific QA assessment associated with the transaction. |
Must = Zero Span |
Always |
Y |
|
4 |
Agency Code of organization performing assessment. |
Must exist in AGENCIES reference table. |
Optional; defaults to user agency |
||
5 |
The FIPS state code of the monitor, or “TT” to indicate that the next field on the transaction is a Tribal code. |
Must exist in STATES Reference Table or be ‘TT’ for Tribal Site |
Always |
Y |
|
6 |
The FIPS County Code of the site. If the previous field on the transaction contains “TT”, then the Tribal Code of the site. |
Must exist in COUNTIES (for state) or TRIBAL_AREAS Reference table |
Always |
Y |
|
7 |
Four digit number to uniquely identify site in county and/or tribe. |
Must exist in SITES table with {State Code, county Code} or Tribal Code |
Always |
Y |
|
8 |
The AQS parameter code assigned to the monitor in AQS. |
Must exist in PARAMETERS reference table. |
Always |
Y |
|
9 |
Parameter Occurrence Code: One or two digit number identifying a specific monitor for a parameter at the site. |
Must exist in MONITOR table for non-Insert actions. |
Always |
Y |
|
10 |
Date that the assessment was performed |
YYYYMMDD. |
Always |
||
11 |
A unique number associated with an assessment performed at a site on a given day. Value should be “1” unless additional same assessments are performed. |
Integer. |
Always |
||
12 |
The sampling methodology of the monitor being assessed. |
Must exist in SAMPLING METHODOLOGIES reference table. |
Insert |
||
13 |
Units associated with the assessment concentrations (Monitor Concentration and Check Standard Concentration). |
Must exist in UNITS reference table, and unit code must be for Concentration units type. |
Unless Delete |
||
14 |
The concentration value provided by the monitor being assessed when exposed to zero concentration. |
Decimal. |
Unless Delete |
||
15 |
The known concentration of the calibration gas at the target span of the monitor. |
Decimal. |
Unless Delete |
||
16 |
The concentration value provided by the monitor being assessed when exposed to the span concentration. |
Decimal. |
Unless Delete |
||
17 |
A code to explain why no monitor value was reported. |
Must exist in QUALIFIERS reference table. |
Monitor values or null data code required |
||
18 |
Free form text describing the assesment or invalidation. |
Text, up to 2000 characters. |
Optional |