Equipment and Calibration History
View Equipment |
| Date: |
2020-02-19 |
| From: |
Lab - |
| To: |
Lab - |
| Title: |
Maintenance |
| Notes: |
This sensor got wet when the tower fell down. I took it apart and discovered that only the real time clock board with battery looked corroded. The sensor ran well without the RTC battery - both particle counters agreed. And the sensor compared well with the new one running side by side. I bought a new RTC board that needed to be modified - a pin header on one side of the board was removed and a diode that enabled charging of the battery needed to be remove since standard coin cells are not rechargeable. After reassembly it ran well and was able to connect with the PurpleAir web site getting its clock reset and running firmware v4.11 |
| Entered by: |
Joe Verfaillie |
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