TURBO INSTRUCTIONS
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APPENDIX C: READING THE SENSOR
Reading the Turbo Sensor via Direct Read
While the Turbo comes with Seametrics’ easy to use Aqua4Plus software, you can also use
standard Modbus
®
RTU or SDI-12 equipment to easily take readings, so as to tie into your
existing equipment or networks.
You may nee to use Aqua4Plus to set the baud rate. (You do not need to set the baud
rate for SDI-12). For Modbus you must have Turbo firmware version 2.0 or higher.
For SDI-12 you must have version 2.2 or higher.
Reading Via Modbus
®
Setting Baud Rate
Your sensor comes configured to
communicate at 38,400 baud, with 8 data
bits, one stop bit, and no parity. The sensor
can also be set to 19,200 or 9600 baud, if
needed for your application.
See Sensor Settings.
Taking Measurements
Read measurements using Modbus
function 03 – Read Holding Registers.
Readings are located in two registers
each, starting at address 62592. (AquiStar
®
register addressing is zero based, i.e., starts
at zero. If your equipment uses one based
addressing, you will need to add one to the
register addresses.)
Register addresses for Turbo Sensor
Zero Based
One Based
Temperature
62592
62593
Turbidity
62594
62595
