Reports
Contents
| Title: | Tonzi Floor swap to new RH-T | ||||||||
| Date: | 2024-02-27 - 2024-03-26 | ||||||||
| Data File: | TZ_RH-T_compare_20240326.csv | ||||||||
| Refers to: | TZ,W0510026,E5736 | ||||||||
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At Tonzi Floor from 2024-02-27 to 2024-03-36 we compared a new HygroVue sn E5736 with the old HMP45 sn W0510026 in preparation for continuing measurements of RH and T with the HygroVue. The old HMP45 has been reading a little low in RH for several years. Overall, the new HygroVue is better. As to whether we should attempt to correct the old data I am uncertain. Certainly the RH needs correction and this has already been implemented. I think this report can act as a place holder and if someone needs more precise RH or T we can look at applying more complicated corrections. Air Temperature looks pretty tight. The old sensor has a few nighttime values a little lower than the new sensor. Both sensors had ventilation fans. I can only guess that the old sensor is just a little flaky. Figure 1. Time series of air temperature.
Figure 2. Regression of air temperature. Relative humidity is the reason this sensor is getting replaced. The old sensor is reading a little low. This was previously fixed by applying a regression to points about 85%, but I don't see an obvious break in the scatter during this inter-comparison. Figure 3. Time series of relative humidity.
Figure 4. Regression of relative humidity. |
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