Flowline LU84-5161 EchoSpan - Manual (Page 22)

22 of 22 EchoSpan 31 MAR 11
MN301550 Rev B
Troubleshooting:
PROBLEM SOLUTION
TANK does not appear on
the main menu: Units function is set for PERCENT on EchoSpan: When Units is
set for PERCENT, the TANK function is disabled. To re-enable
TANK, change units to INCHES, CM, FEET or METERS.
Display shows FULL: Level of liquid is above the FILL-H setting: Check the FILL-H
setting, making sure the FILL-H setting is high enough so the
level of liquid is below the FILL-H setting. The Fill-H setting is
the distance from the bottom of the tank to the Full level of liquid.
Display shows EMPTY: Level of liquid is beyond the HEIGHT setting: Check the
HEIGHT setting, making sure the HEIGHT setting is low enough
so the level of liquid is above the HEIGHT setting.
Display shows WARMUP: Typically occurs when power is being applied to transmitter.
Indicates a weak power supply, bad wire connections or the sensor
is out of the operational range.
Display shows LOST: Sensor is in a Fail-Safe state. The return sound pulses are not
reaching the transducer. First, cycle power off and on, waiting 5
seconds between the off and on states. If problem persists, check
the installation fitting against the Installation instructions in the
manual.
Display is opposite of the
measured value: Check the DISPLAY setting. AIR mode indicates the distance
from the liquid to the sensor. LIQUID mode indicates the height
of liquid in the tank. Change the DISPLAY mode from AIR to
LIQUID or vice versa to correct.
Transmitter indicates a
current of 0 mA: Check the wiring for an open circuit. An open circuit is the most
common issue with a 0 mA signal.
Transmitter jumps to a
current reading between 19
and 20 mA: Check the installation of the transmitter. Bad installation fittings
will cause false signals near the top of the tank, which typically
translates to a signal between 19 and 20 mA. Also look for
interference just below the transmitter. If the transmitter is
installed in a metal fitting, switch to a plastic fitting.
Transmitter indicates a
current over 23 mA: Immediately check the wiring for a short circuit. The EchoSpan is
current limited to 22 mA. Anything above 23 mA indicates a
short circuit.