Campbell-scientific CS110 Electric Field Meter Manual do Utilizador descarregar pdf (Página 22)

CS110 Electric Field Meter

FIGURE 7. NIST calibration certificate

Careful removal and replacement of the stator on the CS110 does

not invalidate the factory derived M

parallel_plate

of a given unit.

However, switching stators with another unit or accidentally

bending the stator, shutter or sense electrodes invalidates the

factory parallel-plate calibration because of possible electrode

dimensional changes.

NOTE

5.2 Site Correction

As previously mentioned, each CS110 is factory calibrated in a parallel plate

calibration fixture resulting in calibration equation 4. However, when

monitoring the Earth’s electric field, equation 4 is valid only if the instrument

aperture is mounted flush with the Earth’s surface and upward-facing. Yet for

permanent outdoor measurements of electric field, a flush-mounted and

upward-facing orientation is problematic because of dirt, bird droppings, rain,

etc., collecting on the sense electrodes and fouling the measurement.

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Campbell-scientific CS110 Electric Field Meter Manual do Utilizador Página 22