SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

Appendix 2. Internal SDI-12 Support for Argonaut SL/XR
A2.1. Introduction
Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)
SonTek/YSI
Starting with firmware version 7.5, the Argonaut-SL/XR offers internal SDI-12 (Serial-Digital
Interface) capabilities that require no external devices or converters. This appendix describes
internal SDI-12 features, wiring, new commands, operation, and SDI-12 protocol.
The SonTek Argonaut Acoustic Doppler Current Meter is fully compliant with version 1.2 of the
SDI-12 protocol. It is easy to use and works with any data recorder/logger with an SDI-12
interface. SDI-12 is ideal for data logging applications with the following requirements.
• Where an additional data recorder/transmitter is required
• Battery powered operation with minimal current drain
• Low system cost
• Up to 200 feet of cable between the Argonaut and the data recorder
Note: The SDI-12 mode only works with standard Argonauts. Argonauts with Wave Spectra,
MicroCat CT, YSI Multiprobe, or other integrated external sensors are not supported.
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