Vaisala WINDCAP WS425 Guide de l'utilisateur télécharger pdf (Page 51)

Chapter 4 ________________________________________________________________ Operation

VAISALA _______________________________________________________________________ 51

Resume Operation

After opening the configuration menu, return to the current mode of

operation by selecting "Resume Operation". This selection terminates the

configuration dialog.

NOTE

Changes to the configuration will not be saved automatically. Use the

SAVE CONFIGURATION command to save the changes.

SDI-12 Protocol

SDI-12 is a standard for interfacing data recorders with microprocessor-

based sensors. The name stands for serial/digital interface at 1200 baud.

SDI-12 is intended for applications with the following requirements:

- Battery-powered operation with minimal current drain.

- Low system cost.

- Use of a single data recorder with multiple sensors on one cable.

- Up to 200 feet (60 meters) of cable between a sensor and a data

recorder.

SDI-12 Support Group

The SDI-12 Support Group is an association of companies that produce

and use SDI-12 products with the purpose of reviewing requests to

enhance, clarify, or modify the

SDI-12 architecture and that votes on proposed changes to SDI-12. More

information of the group, as well as the complete SDI-12 standard text is

available from the SDI-12 web-site in the following address: www.sdi-

12.org/.

SDI-12 Electrical Interface

The SDI-12 electrical interface uses the SDI-12 bus to transmit serial

data between SDI-12 data recorders and sensors. The SDI-12 bus is the

cable that connects multiple SDI-12 devices. This is a cable with three

conductors:

- A serial data line

- A ground line

- A 12-volt line

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 85 86

Pas de commentaire

Vaisala WINDCAP WS425 Guide de l'utilisateur Page 51