Equipment and Calibration

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Equipment Entry

Instrument:Water Level
Manufacture:Druck
Model No:PDCR 1830-8388
Serial No:2421703
Tag No:NULL
Acquisition Date:2006-10-16
Project:NSF-Methane
Location on 2012-10-25:Lab, NULL
Notes: 5psi range. Inital factory calibration 0.98 (mv/V)/psi calibrated on 10/6/2006

Documents

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History

Rec No.DateLoc FromTitleLoc ToNotes
864 2012-10-25 Lab none Disposed Lab none After talking to Campbell, it was decided that this water pressure sensor is unrepairable. It will have to be replaced by a new model.
863 2012-10-18 Mayberry Water Level Removed Lab none This sensor was removed from the Tule Tower due to bad readings and brought back to the lab for a check up.
862 2012-01-17 Lab none Installed Mayberry Water Level Installed on the Mayberry Tule tower.
495 2012-01-04 Lab none Tested Lab none I tested the pressure sensor in the lab by lowering in ito a vertical column of ABS pipe filled with water. The sensor was lowered into the water at depths marked on the sensor's cable, then removed from the water at the same depths: 0, 25, 50, 75, 100, 125, 100, 75, 50, 25, and 0cm

The first test gave slightly higher readings than the second, but the third was between the first two, so I think all's well.

depth in meters = 1.4504 * mV - 0.1881
R2 = 0.9952
494 2011-12-20 Mayberry Water Level Removed Lab none Removed from near the Mayberry tower due to low readings. The sensor head was silted up in the well.
241 2010-10-27 Lab none Installed Mayberry Water Level This sensor was installed at the Mayberry site. It was installed 1.25m below the top of the plastic pipe and the top of the pipe is 71.5cm above the surface.
258 2010-10-20 Lab none Calibration Lab none This water pressure sensor was calibrated in the lab by lowering it into a ABS pipe filled with water. The probe was lowered in 0.25m intervals as marked on the cable and output mV/V values were recorded. The factory calibration is 0.98 (mV/V)/psi and the conversion to depth is 2.307ft/psi. with a little unit conversion to final relationship is:
Depth (m) = Output (mV/V)*0.7472 - 0.0094
237 2010-10-14 Sherman Island Removed Lab none This sensor was removed from the Sherman Tower for lab calibration before being deployed at the new Mayberry site.
1754 2007-03-27 Lab none Installed Sherman Island Installed by Ted at the Sherman cow pasture site