| Date: |
2012-08-07 |
| From: |
Lab - none |
| To: |
Lab - none |
| Title: |
Upgrade |
| Notes: |
This IRAG has been selected to be upgraded to a 7500A head interface. This is the oldest IRGA that has not been overhauled. The upgrade went smoothly, o-rings were greased, the internal chemicals were changed, coefficients were manually entered in the LI-7550 box (sn AIU-0674). The gain potentiometer was adjusted, per instructions, about a half turn before maxing out. The AGC was 50.0 before adjusting and 43.75 afterwards. See initial calibration this date. A subsequent calibration will be done in two days to let the internal chemicals settle. |
| Entered by: |
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