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Manual – Starflow QSD Model 6527B and 6537A
Unidata Manual - 6527B and 6537A Starflow QSD User Manual 17 01 2020.docx Contents 1
TABLE OF CONTENTS
1.0 Introduction ........................................................................................................................ 1
2.0 Specifications ..................................................................................................................... 3
3.0 Operating Principles & Measured Parameters ................................................................ 5
3.1 Flow Velocity Measurement .................................................................................. 5
3.2 Water Depth Measurement – Ultrasonic ............................................................... 6
3.3 Water Depth Measurement - Pressure .................................................................. 6
3.4 Temperature .......................................................................................................... 6
3.5 Electrical Conductivity (EC) – 6537A Only ............................................................ 6
3.6 Accelerometer ....................................................................................................... 7
3.7 Power Supply Voltage ........................................................................................... 7
3.8 Signal Spread ........................................................................................................ 7
3.9 Received Signal Strength Indicator (RSSI) ........................................................... 7
4.0 Taking Measurements From The Instrument .......................................................................... 8
4.1 SDI-12 Operation ........................................................................................................ 8
4.2 Modbus RS485 Operation......................................................................................... 12
5.0 Installation ................................................................................................................................ 16
5.1 Site Considerations ................................................................................................... 16
5.2 Instrument Mounting ................................................................................................. 17
6.0 Configuration - Using The sonic configuration software ..................................................... 19
6.1 Setup – Connection to Starflow QSD ........................................................................ 19
6.2 Settings Starflow QSD .............................................................................................. 21
6.3 Configuration – Configuring Sonic ............................................................................ 25
6.4 Tools – Starflow QSD ................................................................................................ 27
7.0 Instrument maintenance ......................................................................................................... 30
Apendix A - Factors Affecting Flow Measurement Accuracy .................................................... 31
Alignment with Flow and Depth ....................................................................................... 31
Instantaneous Versus “Averaged” Velocity ..................................................................... 31
Conversion of Logged to Mean Velocity ......................................................................... 31
The Speed of Sound in Water ......................................................................................... 32