Equipment and Calibration History
History for Vaisala HMP45A U2120013
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 5662 | 2022-01-19 | Lab none | Tested | Lab none | Ran for a week on the lab bench next to an HMP155; both sensors were aspirated with a plug-in fan. I didn't see any drifting over the week, but still, probably don't want to use this sensor except as a last resort. |
| 5588 | 2021-11-23 | Mayberry RH & Temp | Removed | Lab none | Removed from MB and brought back to the lab for testing. AirT has been drifting downward since late October.It was replaced by HMP155 sn T2820180. |
| 5674 | 2019-10-22 | Mayberry RH & Temp | Repair | Mayberry RH & Temp | Removed screw terminal that was currently fixing a broken wire and fixed the break with solder, heat shrink, and liquid electrical tape. |
| 3847 | 2019-01-24 | Mayberry RH & Temp | Serviced | Mayberry RH & Temp | Short in the 12V wire at the splice point. Repaired in the field with a screw terminal, but should be brought back to the lab for a full repair. |
| 3259 | 2017-12-19 | Twitchell Alfalfa 0 | Removed | Mayberry RH & Temp | Removed from the HMP inter-comparison at Twitchell Alfalfa and returned to Mayberry |
| 3242 | 2017-12-18 | Mayberry RH & Temp | Removed | Twitchell Alfalfa 0 | Removed from Mayberry for 24hour side-by-side comparison at Twitchell Alfalfa |
| 554 | 2012-04-24 | Mayberry RH & Temp | Rewired | Mayberry RH & Temp | Output removed from CR1000 and swapped over to new LI-7700 sn TG1-0224 analog inputs |
| 456 | 2011-11-22 | Lab none | Installed | Mayberry RH & Temp | Installed on the Mayberry tower to replace sn U3030041. This HMP45 has a lengthened cable to allow mounting with the recently raised eddy sensors. |
| 457 | 2011-11-21 | Siyan | Maintenance | Lab none | I lengthened the cable on this sensor. New wire colors are: ?? |
| 378 | 2011-06-18 | Lab none | Loaned | Siyan | Loaned to Siyan for her work at Teakettle Forest. |
| 291 | 2011-02-03 | Tonzi-Floor | Removed | Lab none | Removed from under the trees near the floor tower. |
| 292 | 2010-03-16 | Lab none | Installed | Tonzi-Floor | Installed under the trees near the floor tower. |
| 30 | 2009-12-21 | Lab none | Tested | Lab none | Tested on a CR1000 against an HMP45AC (sn U3030041) freshly returned from Vaisala factory calibration. See file HMP45A_CalCheck.xls. The comparison was for a very small range of temperatures ove a short time but;
Air Temperature: y = 0.7425x + 4.8166 R2 = 0.9972 Relative Humidity: y = 0.99x - 1.4165 R2 = 0.9986 |
| 29 | 1999-08-18 | Factory | Calibration | Lab none | Factory calibrated by Vaisala |