Field Notes

<--2004-07-21 11:00:00 | 2004-08-05 09:41:00-->
Other sites visited today: Tonzi | Vaira

Tonzi: 2004-07-21 11:39:00 (DOY 203)
Author: Ted Hehn
Others:

Summary: New CO2 cal tank for Tower CO2 profile

When: Wed-Sun, 21Jul04 JD-203
Where: Tonzi Ranch
Who: Ted Hehn
Weather Clear & Hot

Tonzi Ranch:
21Jul04

11:39 remove Prax air tank cc108631 425.8ppm
Install new CO2 tank 428.7 ppm on tower for CO2 profile system
Prax air cyl LCCO-SA3583 LUXFER 11A91
Perform zero/span on co2 profile system.
Note: ambient flow rate = 2.5 LPM

Upon energizing N2 or CO2 solenoid the rotometer flow would jump slightly and then return to 2.5 LPM.

Upon drastically increasing the flow rate of co2 span gas to the intake the pressure would remain constant at 940. However, the flow rate indicated by the rotometer would increase to about 3.5 LPM. The span value did not appear to have changed.

It is possible that inadvertently bumping the knob on the gas regulator could cause an unintended increase in flow of zero/span gas. This would result in wasting of the cal gases. It would be wise to put a limiting orifice on the output of the gas regulators to eliminate this problem.

Field Data

No tank data

No TZ Well data found

No TZ Moisture Point data found

No VR Moisture Point data found

No TZ grass heigth found

No VR grass heigth found

No TZ Tree DBH found

No water potential data found

No TZ Grass Biomass data found

No TZ OakLeaves Biomass data found

No TZ PineNeedles Biomass data found