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6
User configuration
Versions that support the HART protocol enable the adjustments
described below to be carried out remotely without the sensor head hav-
ing to be opened.
6.1
Measuring span at the level sensor
To enable configuration of the 4 mA and 20 mA points at the XT-1000 level sensor, two
buttons and an LED (light emitting diode) are provided near the terminals inside the
sensor head.
By default, the level sensor is set to maximum measuring span with 4 mA at the sensor
base and 20 mA at the sensor head. The measuring span is configurable for adaptation to
the tank concerned. However, a minimum clearance of 0.4" must be observed.
If this minimum clearance is not observed, the display direction of the level sensor will be
reversed automatically (ullage measurement).
Through configuration, it is also possible to have the measured value output inverted: e.g.
the level sensor can be set to maximum measuring span with 4 mA at the sensor head
and 20 mA at the sensor base.
Figure 8: configuring the measuring span
Unscrew sensor head cap (1) using an open-ended spanner.
Press and hold 4 mA button (2) or 20 mA button (3) for at least 3 seconds. The
green LED begins to flash.
Page 14/19
XT-1000
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