Download Vaisala MAWS101 User`s guide

Technical Reference_________________________________________________________________
0412-022
Figure 49
Wiring Diagram for 4-Wire Connection
Temperature Measurement PT100 in 3-Wire
Connection
The PT100 sensor in a 3-wire connection is rarely used but can be
configured with MAWS Lizard like any other sensor.
In the Equipment view, select the predefined PT100 sensor from the
list. Proceed then to the Measurements view and select a PT100
measurement. In order to change to a 3-wire measurement, change the
user level to Advanced. The first parameter indicates whether the
measurement in question is a 3- wire or a 4-wire one. You do not need
to change any other parameter default values.
Absolute Shaft Encoder
Absolute Shaft Encoder QSE104 measures water level in a stilling
well. It is based on a true absolute shaft encoder that uses SSI
(Synchronous-Serial Interface) for communication. MAWS is
connected to the encoder via the QMI102 module that reads data from
the encoder and sends it as ASCII via the RS-232 or RS-485 line.
QMI102 may be connected to MAWS COM1 or any other
communication port that supports either RS-232 or RS-485. The
QMI102 module is installed inside the MAWS enclosure.
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