Manual – Starflow QSD Model 6527B and 6537A
Unidata Manual - 6527B and 6537A Starflow QSD User Manual 08 05 2023.docx
Page 3
TABLE OF CONTENTS
Starflow QSD Model 6527B and 6537A ................................................................................ 1
1.
Operation Mode ........................................................................................................ 6
1.1.
Operation Mode Configuring using SDI-12 protocol ................................................... 6
1.2.
Operation Mode Configuring using Modbus RTU protocol ......................................... 6
2.
Introduction .............................................................................................................. 7
3.
Specifications ........................................................................................................... 9
3.1.
Velocity (Continuous Beam) ....................................................................................... 9
3.2.
Depth (Ultrasonic) ....................................................................................................... 9
3.3.
Depth (Pressure) ......................................................................................................... 9
3.4.
Temperature ............................................................................................................... 9
3.5.
Electrical Conductivity (EC) – 6537A ONLY ............................................................... 9
3.6.
Tilt (accelerometer) ................................................................................................... 10
3.7.
Power Requirements ................................................................................................ 10
3.8.
Communications ....................................................................................................... 10
3.9.
Environmental ........................................................................................................... 10
3.10.
Physical ..................................................................................................................... 10
3.11.
Instrument Wiring Table ............................................................................................ 11
4.
Operating Principles & Measured Parameters .................................................... 13
4.1
Flow Velocity Measurement ...................................................................................... 13
4.2
Water Depth Measurement – Ultrasonic ................................................................... 14
4.3
Water Depth Measurement - Pressure ..................................................................... 14
4.4
Temperature ............................................................................................................. 15
4.5
Electrical Conductivity EC 6537A Only ..................................................................... 15
4.6
Accelerometer ........................................................................................................... 15
4.7
Power Supply Voltage............................................................................................... 15
4.8
Signal Spread ........................................................................................................... 16
4.9
Received Signal Strength Indicator (RSSI)............................................................... 16
5.
Taking Measurements From Instrument .............................................................. 17
5.1.
SDI-12 Operation ...................................................................................................... 17
5.1.1.
Channels Table
18
5.1.2.
Measurement Command (aM!)
18
5.1.3.
Additional SDI-12 Commands
20
5.1.4.
Unidata Logger SDI-12 Scheme Setup
22
5.2.
Modbus RS485 Operation ........................................................................................ 27
5.2.1.
Reading the measured parameters via Modbus
27
5.2.2.
Master Format
27
5.2.3.
Slave Response Format
28
5.2.4.
Standard Message Format
28
5.2.5.
Modbus Registers
29
