Thermo Scientific AquaSensors
™
AV88 Universal Analyzer User Guide
46
6.
HOST COMMUNICATIONS
The AV88 can be set up to communicate with a Host Computer system in a variety of protocols. When using
Host Communications, please refer to the selected communications manual for specific protocol setup and use.
Host Protocol Reference Manual to Set up Address, Baud Rate and Parity
Modbus RTU
Modbus Communications Adapter Users Manual (MAN021CA-4)
DeviceNet
DeviceNet Communications Adapter Users Manual (MAN022CA-2)
RS-232
DataStick Instruction Manual (MAN011DS-3): 9600 bps, no parity, 8 data bits, 1 stop bit
Profibus
Modbus/Profibus Gateway Manual
Other
Look for addendums on setting up other protocols that may be configured.
7.
ANALOG OUTPUT MENUS
Two 4 to 20 milliamp analog outputs are provided for traditional data reporting. While the AV88 is being used to
calibrate the sensor, the analog output is held at its present value.
The analog output menu is used to scale the analog output in the AV88. The following selections are available
for each output:
PARAMETER is used to select SENSOR, TEMPERATURE or PID CONTROLLER (if installed with pH
sensor) to drive the current loop. Note that if PID is selected, setting up 4 mA and 20 mA values is not
necessary or available. Settings for PID are set up separately in the PID section of the main menu.
SET 4 mA VALUE is used to edit the lowest sensor or temperature value to be reported. The default
value will be the lowest possible reading for the parameter selected.
SET 20 mA VALUE is used to edit the highest sensor or temperature value to be reported. The default
value will be the highest possible reading for the parameter selected.
The CALIBRATE feature is used to fine-tune the milliamp readings when necessary. An ammeter is
connected in series with the load for adjustment of the 4 mA value and the 20 mA value.
