HF scientific AccUView UV %Transmission Monitor - Manual (Page 30)

8.0 Additional Features and Options
8.1 Backlit LCD
The backlit LCD allows for easier readability of the LCD display in low light or no light
conditions. The backlight is intended for continuous operation. The brightness is
adjustable from a menu in the CONFIG mode.
8.2 Ultrasonic Cleaning
This option is used to continuously clean the flow through cuvette. It is not intended to
clean cuvettes that are already dirty, or replace manual cleaning entirely. The system will
increase the time between cleanings dramatically. Please note that the system requires the
use of a special cuvette. This cuvette must be used for the system to operate correctly.
The system works by sending an ultrasonic frequency through spring connections into a
piezo transducer bonded to the bottom of a flow through cuvette.
The system can detect that an incorrect cuvette is installed, an error has occurred in the
transducer or the transducer is not making contact with the spring connections. This error
is indicated by CLN being posted to the lower screen. Since this is an error condition, the
alarms will be set and the 4-20 mA will be sent to 2 mA.
If the correct cuvette is installed, and the error is still posted, try rotating the flow through
unit slightly to improve the connection. If this fails to work, the cuvette may have to be
replaced (Catalog #24232S). The detection for this cuvette only operates in AUTO mode.
If the system is operating correctly AUTO will flash.
After installing a cuvette, there will be a 30 minute period where the ultrasonic circuit will
not operate to allow the Vapor Purge system to remove all moisture from the ultrasonic
transducer.
Even with the above drying system, it is still recommended that Ultrasonic cuvettes be
dried by hand, including the transducer on the bottom prior to use.
8.3 RS-485 Outputs
If modified correctly, the AccUView has the capability to operate in three different RS-
485 modes. Included is a mode for interfacing into the HF Online software package
(section 8.3.1 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.
Note: The RS-485 is disabled due to the use of 4-20 mA isolator. Contact HF scientific if this
output is desired.
8.3.1 HF Online (HF catalog # 19783)
The AccUView can operate as a small SCADA system with an optional PC software
package, called HF ONLINE. This system allows for an interface with up to 255
AccUView’s for the purpose of data logging. This system will interface directly with
common database and spreadsheet software.
AccUView (6/10)
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