| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 11/10/2016 | 2129 | 11/13/2016 | 1209 | Incorrect |
| 12/10/2016 | 0524 | 12/10/2016 | 1418 | Incorrect |
| 11/25/2016 | 1605 | 11/26/2016 | 0822 | Incorrect |
| 11/20/2016 | 1926 | 11/21/2016 | 1528 | Incorrect |
| 11/03/2016 | 1709 | 11/04/2016 | 1206 | Incorrect |
| 10/26/2016 | 1131 | 10/26/2016 | 1750 | Incorrect |
| 12/14/2016 | 0617 | 12/14/2016 | 1147 | Incorrect |
| Subject: | ASI/CPC/M1 - Counts periodically drifting to zero |
| DataStreams: | asiaoscpcfM1.b1, asiaoscpcfM1.a1, asiaoscpcuM1.a1, asiaoscpcuM1.00, asiaoscpcfM1.00, asiaoscpcuM1.b1 |
| Description: | The CPC counts are periodically drifting to zero. The drift from concentrations comparable to the CPCU is somewhat abrupt, but not instantaneous. Placing a small pressure drop on the inlet (e.g. by measuring the flow rate) causes the counts to return to normal. The root cause of the problem has not yet been identified. More drifts to zero are possible in the future. |
| Suggestions: | Do not use the data during these time periods. |
| Measurements: | asiaoscpcfM1.00: more
asiaoscpcfM1.a1: more asiaoscpcfM1.b1: more asiaoscpcuM1.b1: more asiaoscpcuM1.a1: more asiaoscpcuM1.00: more |