| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D090520.3 | SGP/MFR10M/C1 - Heater failure | sgpmfr10mC1.b1, sgpmfr10mC1.a0 |
| D091112.3 | SGP/MFR10M/C1 - Bad connection | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| D100722.1 | SGP/MFR10M/C1 - Poor connection | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| D120229.2 | SGP/MFR10M/C1 - Noise in ch415, sensor degradation | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/17/2009 | 0528 | 05/20/2009 | 2300 |
| 05/24/2009 | 0300 | 06/10/2009 | 1600 |
| Subject: | SGP/MFR10M/C1 - Heater failure |
| DataStreams: | sgpmfr10mC1.b1, sgpmfr10mC1.a0 |
| Description: | The heater stopped working on 20090517. Maintenance on 20090520 seemed to resolve the problem, but the heater failed again on 5/24. Additional maintenance on 20090610 seems to have resolved the issue. The instrument is designed to operate with a head temp of around 40 deg C. As the head was at ambient temp during the period covered by this DQR, the mentor suggests looking at the 25m MFR if one is interested in these data. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/05/2009 | 1809 | 11/25/2009 | 2000 |
| Subject: | SGP/MFR10M/C1 - Bad connection |
| DataStreams: | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | The instrument was pulled for quarterly calibration on 20091105. When the instrument was reinstalled, the head cable was not making a good connection to the head. Cleaning the connector and reinstalling resolved the issue. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/11/2010 | 2014 | 05/13/2010 | 1505 |
| Subject: | SGP/MFR10M/C1 - Poor connection |
| DataStreams: | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | The instrument was pulled for calibration on 5/11. Upon re-installation, a good connection was not made. Problem resolved on 5/13. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/09/2010 | 0000 | 02/06/2012 | 2359 |
| Subject: | SGP/MFR10M/C1 - Noise in ch415, sensor degradation |
| DataStreams: | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | This instrument experienced general degradation over a period of more than a year. Please see D120229.3 (DQPR-2693) and D120229.4 (DQPR-2763) for more information. The 415nm channel was noisy. The noise wasn't extreme, so initially at least, the mentor would not expect much impact in using the 415 data. However, toward the end of the period covered by this DQR, we start seeing a general degradation of this instrument. On 20110720, after a calibration, channel 615 is dead. On 20111101 the open channel stops functioning. This instrument is calibrated every three months. The past couple/few calibrations showed a steady decline in the sensitivity of 415. The declining sensitivity should be generally accounted for by each new calibration, but as time moved one, one should become less and less confident in those (415) data. In general, the mentor would suggest using 20110720 as a cut-off date for reliable data (all channels). Caution is given for all channels as the instrument is failing, though the channels not specifically mentioned may be OK. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
|