Equipment and Calibration History
History for Licor LI-610 DPG478B
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 6460 | 2023-11-03 | Lab none | Maintenance | Lab none | The "from condenser" tubing was cracked so air flow was really low. Joe pulled out the old tubing with a pair of pliers and replaced it with fresh tubing. Air flow is better now. |
| 6354 | 2023-08-01 | Loaned none | Returned | Lab none | Peter returned the dewpoint generator and power cable back to the lab |
| 6335 | 2023-07-21 | Lab none | Loaned | Loaned none | Loaned to Peter Chuckran from the Firestone Lab. They needed a last-minute dew point generator to replace one that broke. They will return it in a week or so. |
| 5703 | 2022-02-28 | Loaned none | Returned | Lab none | Returned from Katerina back to us. There is an issue with the flow rate and it doesn't seem to go above 100 cc/min. There's enough water in the reservoirs and the condenser seems to be doing its job. I tried swapping out the internal air filter with a brand new one (borrowed from the UCSC kit), but that didn't make a difference. I don't think the rate was diminishing over time, so it makes sense that the internal air filter was fine.
Probably the problem is with the air pump diaphragm. The manual says that "A pump that is functioning normally will generally output a pressure of 450 to 600 mb, when measured at the TO CONDENSER port." I'm not sure how to measure that pressure (with something like a tire pressure gauge?) but I should probably check that before taking the pump apart. I changed the air pump diaphragm following the instructions in the manual and all seems well. |
| 5657 | 2022-01-11 | Lab none | Loaned | Loaned none | Loaned to Katerina Estera-Molina to test an experimental set up at the Oxford greenhouse. Loaned with the power cable, syringe, and needle. I did not empty the water before transportation since she's driving and not going very far. She will return it the week of Jan 24. |
| 5131 | 2021-03-01 | Lab none | Maintenance | Lab none | The dew point was stuck at about 34C - not dropping to the set point of 20C. I found a crack in the "from cooler" tubing. I replaced this piece of tubing but this didn't solve the problem. There was an air bubble in this piece of tubing and the machine was making an unusual bubbling sound. Refilling the reservoir with DI water immediately change the sound, got rid of the air bubble in the tubing and the dew point began to drop towards the set point. |