Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/27/1995 | 2100 | 10/13/1995 | 1230 | Incorrect |
Subject: | SGP/EBBR/E26 - Battery Voltage Drop |
DataStreams: | sgp30ebbrE26.b1, sgp15ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | Shortly after the PM visit on September 26, 1995 the EBBR battery voltage at E26, Cement, OK declined to lower than acceptable levels. During the October 13, 1995 PM visit the battery was replaced. I do not know the specifics of why the battery voltage declined so suddenly, but failure of one or more of the battery cells is a possibility. I have not received the site operations log of the PM visit yet. The voltage dropped to 10 volts at night. At various times, soil temperature, soil heat flux plate output, and atmospheric pressure (at least) were not reported correctly by the CR10 datalogger. Amazingly, the AEM continued to work and reported millivolt outputs that did not fall below the acceptable ranges. All data between 2100 GMT on September 26, 1995 and 1230 GMT on October 13, 1995 should be considered suspect, particularly when the battery voltage fell below 11 volts (every nighttime). This general caution is issued because incorrect reporting of data also took place during times when the battery voltage was reported as 12 Volts, a normally acceptable level; the reason for this behavior is unknown. |
Suggestions: | |
Measurements: | sgp5ebbrE26.b1: more
sgp15ebbrE26.b1: more sgp30ebbrE26.b1: more |