User Manual

Chapter 3 _____________________________________________ Configuring Modules and Sensors
VAISALA_______________________________________________________________________ 73
However, in low-power systems some power reduction can be
implemented. In such case, you can select the When measuring option
in the Sensor power on frame of the Measurements view; see Figure
31 on page 73.
0711-138
Figure 31 Measurements View: Configuring Powering Control
For the example wiring diagrams, refer to Chapter 7, Technical Data, on
page 337.
If you select the Power control enabled option, you can choose the
following:
-In the Sensor power on frame: Powering of the wind vane, either
continuous or during measurement only
-In the Vane power bit frame: The output pin of the QMI digital
I/O module to be used to control sensor excitation in the When
measuring mode
-In the Powering polarity frame: The QMI digital I/O module
output, which is typically normal but can be reversed. This depends
on the hardware used to control powering.
- The Pre-measure delay field: The delay between power on and
measurement start [ms]. This option provides stabilization time for
sensor before measurement is made. The value should never be less
than 60 milliseconds.