5
51-638 Echotel Model 338 Two-Wire Ultrasonic Transmitter
The middle row of the LCD module consists of a 6-digit
alphanumeric display of all data. Engineering units for the
numeric data are printed above and below the LCD. Two
pointers are used to indicate which units pertain to the
display that is currently being viewed. The pointer in the
upper right portion of the module indicates:
M
=
Metric (numbers displayed can be either cubic
meters, meters, cm, or liters)
US
=
US (numbers displayed can be either cubic feet,
feet, inches, or gallons)
Programming with the LCD module involves pressing one
or two (simultaneously) of the four push buttons. The
push buttons can also be used to access data while in the
normal operating mode as shown below.
Push button
While Configuring Unit
In Normal Mode
ENTER
QuickSet Configuration:
saves the displayed data
Not used
and proceeds to the next parameter register
Complete Configuration:
switches between the
parameter value and the parameter register
NEXT
Shifts the blinking digit one position to the left
Switches between measurement modes
(level, distance, volume, flow)
UP
Used to increase the value of the blinking digit
Displays the temperature reading
DOWN
Used to decrease the value of the blinking digit
Displays the current (mA) reading
There are two LEDs that can be used to make sure that
the 338 transmitter is functioning properly. The ECHO
LED will remain lit as long as the 338 is receiving a good
signal reflected back from the liquid surface. The COM
LED is for remote communications, and is not currently
used by the 338 transmitter.
LEV
UP
DOWN
NEXT
ENTER
