Equipment and Calibration History

History for Vaisala HMP60 L1740398

Rec No.DateLoc FromTitleLoc ToNotes
6244 2023-04-03 Bouldin Corn RH & Temp Removed Lab none Removed from the BC tower and brought back to the lab for testing b/c the sensor was not giving any data
4654 2020-07-30 Lab none Installed Bouldin Corn RH & Temp Installed at BC to replace sn L1740395, which was sent to Campbell for repair
4190 2019-10-15 Lab none Tested Lab none Tested at Oxford Tract for a week against reference sensor HMP155 sn R0360206. See RT Report "HMP155 lab and Oxford test":
https://nature.berkeley.edu/biometlab/bmetdata/rtreport.php?screen=view&id=28

The sensor was within spec, so no calibration needed. (Specifications from manual: AirT= +/-0.6°C, RH= +/-3% for 0-90% RH)
4189 2019-10-02 Bouldin Alfalfa 0 Removed Lab none Removed from BA CH4 release experiment and brought back to the lab.
4090 2019-08-16 Lab none Installed Bouldin Alfalfa-ReleaseEx RH & Temp Lower Installed for CH4 release experiment at 0.4m and will continue to measure in hopes of giving insight on boundary layer.
3800 2018-11-14 Factory Received Lab none Received back from Campbell Sci. They tested it against their reference for temp and RH at 90%, 50%, and 20% and could not find any issues. We should test it again in the lab.
3797 2018-09-14 Lab none Shipped Factory Shipped back to Campbell Sci for testing (drifting downward).
3680 2018-08-23 Bouldin Alfalfa RH & Temp Removed Lab none Removed from BA due to low temperature readings. Several other HMP60s have similarly failed.
2412 2016-08-12 Lab none Installed Bouldin Alfalfa RH & Temp Installed with the initial set up of the site.