Equipment and Calibration History

History for Vaisala GMP221 H1310008

Rec No.	Date	Loc From	Title	Loc To	Notes
1280	2014-04-08	Lab none	Disposed	Disposed	Tested bad in the lab. Considerable corrosion on the outside of the cell.
1228	2014-02-25	West Pond CO2 probe A	Removed	Lab none	Removed from West Pond due to bad readings. Initial inspection in the field revealed the probe to be wet inside the Teflon sock. The black plastic dip sealing the top of the sock may have leaked. There was black residue inside the sock. Test in the lab before list as dead.
908	2013-01-17	Lab none	Installed	West Pond CO2 probe A	Installed in a teflon sock in the water near the other water sensors
1421	2013-01-08	Lab none	Calibration	Lab none	Trueppm = Probeppm*0.9955 + -27.3; linear relationship between the ppm reported by the probe and the known ppm of the calibration tanks. Tanks: zero air (0ppm), 421ppm, 3056ppm, and 10000ppm. Ta=22.3C, P=102.5kPa. Because the lab conditions were close to factory conditions, no temperature or pressure corrections were applied. Done by: Sara.