Vaisala WMS302 Podręcznik Użytkownika Pobierz pdf (Strona 22)

User's Guide ______________________________________________________________________

20 ___________________________________________________________________M210630EN-B

AWS Logger

0312-024

Figure 3 AWS Logger QML201

QML201 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 (these can

also be used as digital inputs). Moreover, there are two frequency sensor

interfaces, a 16 bit A/D converter, 1.6 Mb of secure Flash memory for

data logging, as well as excitation power supply for sensors and charger

for the internal backup battery.

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 serial line connections, that is, RS-232 labeled as COM0 and RS-

485 labeled as COM1, have two level ESD protection circuits with

VDRs directly at input pins.

The logger is located in the tube and is further encased to protect the

circuit board and the battery.

The cover of the logger can be removed for installing the battery and for

resetting MAWS. In Figure 4 on page 21, the logger is shown without

the cover and the optional communication modules.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 261 262

Brak uwag

Vaisala WMS302 Podręcznik Użytkownika Strona 22