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EL tiltmeters and EL beam sensors are high resolution, narrow-angle tilt
sensors. At installation time, these sensors should be adjusted so that
their output is null or near zero. This makes the maximum range of these
sensors available. To adjust a standard sensor, the user connects the
nulling device directly to the DB9 connector on the sensor board, checking
that the dip switches are set properly. To adjust an SC sensor, the user
connects signal cable from the sensor to a bare-wire adaptor that is
supplied with the unit.
When the unit is switched on, red, yellow, and green LEDs guide the user
in adjusting the sensor. When the output of the sensor is null, only the
green LED is illuminated.
The EL Nulling device does not provide measurements; it is used only for
installation. Measurements are obtained with either the
EL Data Recorder, which can
also serve as a nulling device, or a data logger. |
