Equipment and Calibration History
History for Licor LI-7550 AIU-0674
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 6245 | 2023-03-08 | Lab none | Installed | Bouldin Corn Interface LI-7550 | Installed at BC tower to replace sn AIU-1866 which was removed because of power problems |
| 6083 | 2022-11-02 | Bouldin Alfalfa-ADEX Interface Edge LI-7550 | Removed | Lab none | Removed from the Edge tower at the end of the 2022 advection experiment at BA |
| 5855 | 2022-04-25 | Lab none | Installed | Bouldin Alfalfa-ADEX Interface Edge LI-7550 | Installed on the Edge tower for the advection experiment at BA |
| 4993 | 2020-11-30 | Lab none | Upgrade | Lab none | Upgraded embedded firmware from 8.5 to 8.8.32. This version should be used with the Windows software v8.8.35. Many changes, mostly related to Smartflux which we don't use. However, some changes which will hopefully improve clock syncing with the 7700. v8.8.32- Fixes an issue that prevented the LI-7550 from reconnecting with the LI-7700 after the LI-7700 was rebooted without rebooting the LI-7550. v8.8.15 - Fix incorrect headers for LI-7700 methane data. Fix configuration issues from GHG Windows software when setting up a LI-7700 methane analyzer. Fixed issue to ensure LI-7700 doesn't show up in metadata file when a methane analyzer isn't present. Remove 15 second connection watchdog timer that sometimes triggered at the wrong time and disconnected from the LI-7700 methane analyzer.Revamped code that logs LI-7700 methane data with CO2 data in order to prevent missing LI-7700 data. https://www.licor.com/env/support/LI-7500RS/topics/change-log.html |
| 2618 | 2017-02-13 | Factory | Returned | Lab none | Returned from repair at Licor. |
| 2615 | 2017-01-10 | Factory | Repair | Factory | Licor says "Inspected the units and found the front panel corroded in the LI-7550 and the LI-7540 in operational condition. Replaced defective parts, updated the embedded software in the LI-7550 to 8.5.0, subjected units to environmental tests and calibrated." They replaced the connector panel assembly, ribbon cables and vent membrane. |
| 2579 | 2017-01-05 | Lab none | Shipped | Factory | Sent to Licor on RMA 00199505 with 75H-2668. This box had its door left open in the field and got rain inside. It was functional but throwing errors - probably a bad temperature controller. It was sent with the head to Licor for repair. |
| 2559 | 2016-12-21 | Twitchell Alfalfa Interface LI-7550 | Removed | Lab none | This 7550 box was damaged in the field. The door was left open and the circuit board got wet. Brought back to the lab for testing and repairs. LI7500 head sn 75H-2668 was deployed with the unit when it was damaged. |
| 2241 | 2016-04-13 | Twitchell Alfalfa Interface LI-7550 | Upgrade | Twitchell Alfalfa Interface LI-7550 | Updated the 7550 firmware from v7.3.0 to v8.0.0 skiping version 7.5.0 Relevant 7.5.0 changes: Main Window is now resizable, Added serial number entry for sonics, Help update, Fixed timeout when saving config files Relevant 8.0.0 changes: Separate bandwidth settings for analog inputs and gas channels, Detection of new RS instruments, Additional calibration coefficients, Added sonic software version entry, Added chopper temp logging |
| 1594 | 2014-10-02 | Twitchell Alfalfa Interface LI-7550 | Upgrade | Twitchell Alfalfa Interface LI-7550 | Updated the 7550 firmware from v7.0.1 to v7.3.0. Fixed bug that can cause the instrument to restart unexpectedly, added 7700 data to interface can view/log power Vin, other minor bug fixes. |
| 1593 | 2014-03-07 | Twitchell Alfalfa Interface LI-7550 | Upgrade | Twitchell Alfalfa Interface LI-7550 | Updated the 7550 firmware from v6.5.5 to v7.0.1. Improved interface, support for SmartFlux, bug fixes. |
| 1143 | 2013-11-21 | Twitchell Alfalfa Interface LI-7550 | Upgrade | Twitchell Alfalfa Interface LI-7550 | The firmware of the 7550 box was upgraded from v6.5.2 to v6.5.5 to fix bugs with the USB memory overwrite and synchronizing the 7700 clock. |
| 1008 | 2013-05-24 | Lab none | Installed | Twitchell Alfalfa Interface LI-7550 | Installed on the north side of the scaffolding at the Alfalfa site with head 2180 |
| 930 | 2013-02-12 | Factory | Upgrade | Lab none | Returned from Licor with 75H-2176 after repair for the condensation problem. The external connector circuit board at the bottom of the box has been completely sealed. New firmware v6.0.0 has been loaded on the box and requires new Windows interface software. Pressure Sensor sn PX-2828 A0=57.462, A1=15.200. |
| 906 | 2013-01-10 | Lab none | Shipped | Factory | Sent to Licor with H-2176 for fix of condensation problem |
| 874 | 2013-01-03 | Twitchell Rice Interface LI-7500 | Removed | Lab none | Reomved from the Twitchell Rice tower for repair of the condensation problem, replaced by AIU-0650. Heads swapped for calibration at the same time. |
| 770 | 2012-09-06 | Lab none | Installed | Twitchell Rice Interface LI-7500 | Installed on the Twitchell tower to replace sn 0614 that was having trouble accepting new heads. sn 0614 was removed to the lab for observation. Head 2150 was removed for calibration and head 2176 was swapped in. |