Equipment and Calibration History

History for Vaisala GMP221 H1310020

Rec No.	Date	Loc From	Title	Loc To	Notes
1032	2013-07-23	Lab none	Tested	Disposed	I (Sara Knox) tested the probe in the lab to try to figure out what was wrong with it. It still maxed out at 5000 mV and the lights on the circuit board were flashing red and green. I took it out of the teflon tubing to inspect the probe for water damage - sure enough it was all corroded. I think its dead Jim.
1031	2013-07-16	Mayberry CO2 Probe A	Removed	Lab none	Removed open water CO2 probe since it was railed at 5000 mV.
658	2012-07-26	Lab none	Installed	Mayberry CO2 Probe A	Installed on the Tule Tower to measure water CO2 concentration.
1417	2012-06-27	Lab none	Calibration	Lab none	Trueppm = Probeppm*0.9873 + 114.4; linear relationship between the ppm reported by the probe and the known ppm of the calibration tanks. Tanks: zero air (0ppm), 436ppm, 3056ppm, and 10000ppm. Ta=25.9C, P=101.4kPa. Because the lab conditions were close to factory conditions, no temperature or pressure corrections were applied. Done by: Sara.