Equipment and Calibration History
History for Fabricated BB-Fab BB-TA
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 3479 | 2018-06-05 | Twitchell Alfalfa | Removed | Vaira | The site was shut down and the battery bank with action packer was removed for use at Vaira soil co2. |
| 3352 | 2018-03-07 | Twitchell Alfalfa | Maintenance | Twitchell Alfalfa | The battery bank at TA was rewired from to pairs (24V) to four in parallel (12V). |
| 2227 | 2016-04-01 | Twitchell Alfalfa | Upgrade | Twitchell Alfalfa | I put the battery bank in a new battery box, a Rubbermaid 35-gallon Action Packer. The four batteries fit with room to spare. |
| 2057 | 2015-11-11 | Twitchell Alfalfa | Upgrade | Twitchell Alfalfa | All four batteries were swapped out. Four new 27DCMJ batteries were installed. Two of the old batteries had Jan 2012 stickers and may not be in such bad shape. |
| 2056 | 2015-10-20 | Twitchell Alfalfa | Notes | Twitchell Alfalfa | The tower started losing power regularly over night. Time to swap out the batteries. |
| 2055 | 2015-09-15 | Twitchell Alfalfa | Notes | Twitchell Alfalfa | The batteries have started to have problems supplying 12V from the 6400. |
| 2054 | 2014-09-04 | Twitchell Alfalfa | Upgrade | Twitchell Alfalfa | A line was added to one of the external batteries to pull 12V off for the 6400. |
| 2053 | 2014-08-15 | Twitchell Alfalfa | Upgrade | Twitchell Alfalfa | The older external third battery was removed. The original two batteries were rewired into series and the other two isolated batteries were integrated. The system is now two pairs of batteries for a 24V system. |
| 2052 | 2014-08-13 | Twitchell Alfalfa | Upgrade | Twitchell Alfalfa | Two batteries for the soil CO2 system were brought over from Sherman. These two batteries are in series for 24V and are isolated for the time being from the solar system. |
| 2051 | 2013-11-25 | Twitchell Alfalfa | Upgrade | Twitchell Alfalfa | A third older battery was added in parallel outside the wooden box due to low voltage power outages. |
| 2050 | 2013-06-05 | Twitchell Alfalfa | Upgrade | Twitchell Alfalfa | The batteries were moved into an insulated wooden box. |
| 2049 | 2013-05-24 | Lab none | Installed | Twitchell Alfalfa | Two Flooded Lead Acid (FLA) batteries model 27DCMJ deep cycle batteries with Jan 2012 stickers were installed in parallel for a 12VDC battery bank. The batteries are in then open. |