Operating Manual

Accu-Wave Chapter 1 Introduction
TN Technologies 1-3
Input/Output Characteristics
Type Characteristics Comments
Current output
0-20 mA dc (adjustable range)
Isolated, Loop-Powered,
24 Vdc Nominal Supply
Voltage, 700 ohm max. load
Default range is 4-20 mA dc.
One current output is provided.
Serial
communications
RS485: One terminal block and
one RJ11 Jack
RS 232: One terminal block
(Requires optional board.)
Half-duplex party line
communication to host computer
or Hand-Held Terminal.
Full duplex communication with
a remote terminal or PC.
Contact closure
input
One (1) contact closure input is
provided.
The user can assign a command
to execute based on user-provided
contact opening or closure input
to the gauge.
Remote Display
2 Line x 16 Character Display
- Backlit
Features and Benefits
Dynamic Menu System
You see only the menu options pertinent to your application. The initial “Set up level, ...”
menu takes you through a basic setup to get your instrument up and running quickly. Help
screens are available at appropriate points.
Built-in Volume Measurement
Select one of the pre-defined tank shapes, enter its dimensions, and the gauge computes
volume from an internal equation library. Alternately, you can define volume as a
polynomial expression based on the level (height) or as a break table of volume and height
value pairs.
Instantaneous Response
TN Technologies Dynamic Process Tracking
TM
(DPT) ensures no lag time in the system
response to level changes. When sudden process changes occur, the DPT feature reduces
the normal averaging time constant by a factor of eight, ensuring a smooth and rapid
output response. When the process stabilizes, the longer time constant is applied to reduce
spurious fluctuations in the measurement. In this way, actual changes in process level are
immediately reflected in the transmitter output, while the effects of signal variations from
turbulence and other short term factors on the measurement are greatly reduced.