51-616 Echotel Model 350/351 Ultrasonic Non-Contact Level Transmitter
12
2.5.1 Mode Selection
The Mode selection is accessed by pressing the
button
three times from the normal display mode or
RUN
. The
unit will display
MODE
. Press
to display present mode
(
HGT
or
DIST
). Use the
or keys to choose desired
mode. Refer to
Section 2.4, Mode of Operation
for addi-
tional information.
NOTE: In the DISTANCE Mode, all values of range and span are
measured from the sensor face instead of the reference point
or range point. Although distance selection is measured from
the sensor face, the output can only be set between the SPAN
and RANGE.
Changing
MODE
will reset range and span. All set-up pro-
cedures must be repeated if
MODE
is changed.
ENT
In the
DISTANCE
Mode, when the liquid level is at the
bottom of the tank, defined by the
RANGE
setting, the
loop output current is 20 mA. When the liquid is at the
top of the tank, as defined by the
SPAN
set point, mea-
sured from the sensor face, the output is 4 mA.
2.5
Special Menus
The Special Menus allow setting of the mode of opera-
tion, maximum gain, and the desired default display in the
run condition. Shown below is the menu screen:
ENT
ENT
ENT
IDLE
DIST
LEVL
LOOP
ENT
ENT
ENT
ADDR
HOST
TERM
OFF
BAUD
ENT
ENT
ENT
ENT
ENT
ENT
44
ENT
MODE
MAXG
DISP
COMM
UNIT
DIST
HGT
00
9600
4800
2400
1200
