Vaisala HydroMet Service Manual download pdf (Page 45)

Chapter 4 ______________________________________________________________ Data Logging

VAISALA________________________________________________________________________ 43

CHAPTER 4

DATA LOGGING

Internal Flash Memory

The QML201 Logger has 1.7 Megabytes of secure flash memory

available for the logging of measured and calculated data. The flash

memory does not need any external or internal back-up batteries, and

preserves its contents for many years.

There can be several logging schedules where the parameters and

logging intervals are user definable. The intervals are configurable

from 1 second to 24 hours at 1-second intervals. Data are logged into

the daily files, which can be retrieved through the communication

channel(s) locally using a laptop PC, or remotely via a modem.

The user can also specify how many days of back-up data is held in

the memory. When the memory is full the system will automatically

free space by deleting old files, but will always preserve the user

specified amount of most recent files in the memory.

The logged files can easily be retrieved e.g. onto a PC’s hard disk

using the MAWS Terminal software, which is included in the MAWS

delivery. The MAWS Terminal automatically converts the binary files

into Comma Separated Value (CSV) format used e.g. by Microsoft’s

Excel software.

In addition, the logged data can be used in data reports that are sent

via communication port(s).

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Vaisala HydroMet Service Manual Page 45