Campbell CS110 - Page 75

A site calibration is a regression of data obtained during a high e
field
event from the reference
calibrator (Y axis) and the DUC (X axis). The following example shows the site calibration done for
the Transfer Standard using a CS110 installed at the surface of the ground facing up. The
regression yields a C
site
of 0.16.
Figure J-2. Regression to determine C
site
multiplier
1. Install the DUC in its permanent location.
2. Install the calibrator as close to the DUC as possible, where it is free from obstructions
blocking its view of the sky more than 18 degrees above the horizon. The following sections
include the setup instructions for the Transfer Standard calibrator. A downloadable
calibration program is available at available at: www.campbellsci.com/downloads/cs110-
programs
3. In the DUC program, use its unique Mparallel_plate calibration factor and a C
site
of 1.
4. In the calibrator program, use its unique Mparallel_plate calibration factor and a C
site
of
0.16 for the Transfer Standard configuration or a C
site
of 1.0 for an up-facing calibrator.
5. Sync the clocks in both CS110s.