Chapter 2 ___________________________________________________________Product Overview
VAISALA ________________________________________________________________________ 23
QML102 AWS Logger
QML102 is a complete AWS logger designed on one printed board
only. This board contains a 32 bit Motorola CPU for data processing
and 10 differential (20 single ended) analog sensor inputs, that can
also be used as digital inputs. Moreover, there are two frequency
sensor interfaces, a 16 bit A/D converter, 1.7 Mbytes of secure Flash
memory for data logging, as well as charger for the internal backup
battery of 1.3 Ah/6V.
The board uses the latest SMD (Surface Mount Device) technology
and is conformal coated for improved protection also in high
humidity. Each sensor input has a varistor (VDR) protection against
induced transients. The maintenance terminal connection (RS-232,
COM0) has transzorb diodes in its inputs.
0105-001
Figure 3
QML102 Logger
In MAWS101 and MAWS201 the QML102 logger is located in the
tube and is further encased to protect the circuit board and the battery.
The cover of this protective housing can be removed for installation of
the battery and for resetting the MAWS. See Figure 4 on page 24.
Optional modules under the housing include, for example, the
Memory Expansion Board, various communication modules, and
built-in pressure transducer.
