1
Introduction
RINKO FT (model name: ARO-FT, AROD-FT) is a small, fast-response, and high-precision sensor for
measurements of water temperature and dissolved oxygen (DO).
The communication method can be selected from UART (3.3V logic) and RS-232C according to the float
specifications.
Possible to attach/detach the main unit without changing the float inner pressure for calibration/inspection.
Span/zero calibration is possible by the calibration kit (optional).
Table of Contents
1 Terminology and Part Names .......................................................................................................... 2
2 Package Contents ............................................................................................................................. 4
3 Safety Warning .................................................................................................................................. 6
4 Precautions for Usage ...................................................................................................................... 8
5 Method for Connection..................................................................................................................... 9
6 Maintenance and Inspection .......................................................................................................... 13
7 Span/zero Calibration (optional) ................................................................................................... 14
8 Troubleshooting .............................................................................................................................. 29
9 Specifications .................................................................................................................................. 31
10 Warranty ........................................................................................................................................... 36
Appendix 1: Command reference
Appendix 2: Command summary
Appendix 3: Examples of operation sequence