Table of Contents

1.0 Introduction

• 1.1 WLTS SDI-12 Interface Overview
• 1.2 WLTS SDI-12 System Components
• 1.3 Sensor Overview & Measurement Parameters
  • 1.3.1 Absolute Level
  • 1.3.2 Vented (Gauge) Level
  • 1.3.3 Temperature
• 1.4 Communication/Vented Cables
  • 1.4.1 Communication Cable Connections

2.0 WLTS Software Utility

• 2.1 Communicating with the WLTS Utility
• 2.2 Programming the Water Level Temperature Sensor

3.0 SDI-12 Wiring Setup and Installation

• 3.1 SDI-12 Wiring Setup
• 3.2 Installation
  • 3.2.1 Installation in a 2" Well
  • 3.2.2 Biofouling Conditions

4.0 WLTS SDI-12 Operation

• 4.1 The SDI-12 Address
• 4.2 Activation and Verification

5.0 SDI-12 Supported Commands

• 5.1 Acknowledge Active Command: a!
• 5.2 Address Query Command: ?!
• 5.3 Send Identification Command: aI!
• 5.4 Change Address Command: aAb!
• 5.5 Start Measurement Command: aM!
• 5.6 Start Measurement Command with Checksum: aMC!
• 5.7 Send Data Command: aD0!
• 5.8 Start Concurrent Measurement Command: aC!
• 5.9 Start Concurrent Measurement Command with Checksum: aCC!
• 5.10 Start Verification Command: aV!

6.0 Maintenance and Troubleshooting

• 6.1 Maintenance
  • 6.1.1 Sensor Maintenance
    • 6.1.1.1 Changing or Updating WLTS
  • 6.1.2 Communication/Vented Cable Maintenance
• 6.2 Firmware Updates
• 6.3 Troubleshooting

7.0 References