Flowline LU78 EchoSwitch - Manual (Page 7)

Rev A MN300282 7 of 34
GETTING STARTED (continued) Step Four
TOP‐LEVEL MENU Descriptions
 UNITS – Allows end user to select the units for configuration and operation.
o Select between Inches, Centimeters, Feet, Meters or
Percent.
o Press EXIT to return to the TOP‐LEVEL MENU.
 TANK – Allows the end user to configure the operational range
for the switch as well as the 4‐20 mA output signal.
o HEIGHT – Distance from the transducer face to the
bottom of the tank.
o FILL‐H – Maximum fill height of the liquid from the
bottom of the tank.
o Note: The 4 and 20 mA points are set by setting these
two points.
 The 20 mA point is at the Fill‐H and the 4 mA
point is at the bottom of the tank.
 The 4 and 20 mA set points cannot be reversed.
o Press Exit to return to the TOP‐LEVEL MENU
o Note: if UNITS is set to Percent, then TANK will not appear. To view TANK, set UNITS to any of the
following: Inches, Centimeters, Feet or Meters
 RELAY 1, RELAY 2 or RELAY 3 – Allows end user to configure the function and operation of each relay.
Each relay has a small black circle that appears when the relay is energized. When the relay is de‐
energized, the black circle disappears.
o PUMP – Pump operation allows for two separate level set points (Relay ON and Relay OFF).
Choose between the EMPTY or FILL operation. Both operations require setting a level for ON and
another level for OFF
 EMPTY – used to control a pump that empties a tank.
 Typically, Relay ON is the HIGH set point and Relay OFF the LOW set point. Relay will
energize at the high set point (ON) and remain on until the level reaches the low set
point (OFF). It will remain off until the level returns to the high set point (ON).