Aquametrix AM-TBR Turbidimeter User Manual User Manual

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Figure 6 - Operational parts of the Ultrasonic Cleaning System

8.3. RS-485 Outputs

The AM-TBR has the capability to operate in three different RS-485 modes for all models.
Included is a mode for interfacing into the online software package (section below), and a simple
communication mode. A third operating mode is the Modbus communications. All modes will
automatically configure and do not require any changes or selections.

8.3.1. Water Analytics Online (WA catalog # 19783)

The AM-TBR can operate as a small SCADA system with an optional PC software package,
called WA ONLINE. This system allows for an interface with up to 255 AM-TBR’s for the
purpose of data logging. This system will interface directly with common database and
spreadsheet software.

8.3.2. Simple Communication

The AM-TBR can provide basic communications over simple programs such as the Hilgraeve
HyperTerminal that is included with most Microsoft Windows packages. The user could also use
Visual Basic or other programs. The default communication parameters are 8 bits, no parity and
1 stop bit. These can be changed in the Extended CONFIG menus (see section 7.14).

The master computer will send out:

1. Byte #1 the attention character “:” in ASCII or 3A Hex

2. Byte #2 the address of the AM-TBR being queried

3. Byte #3 & 4 CR LF or 0D 0A in hex

The AM-TBR will respond with:

1. The same attention character “:” in ASCII or 3A Hex

2. The address of the AM-TBR

3. The Reading

4. The Unit (NTU)