TD80™ Level Gauging and Overfill Prevention System Product Manual
Page 86 TD80 and Overfill Prevention System Troubleshooting/ Rev. 2, August 4, 2015
5. Finch Display continuously shows a level in an empty tank.
a. Check the probe for physical
damage, defects or product build
up.
i. Probe may be bent
or twisted
Repair or replace the probe.
ii. Inspect the probe for
heavy product buildup
bridging the rods.
Clean the probe with a solvent
compatible with the product.
b. The TD80 transmitter may be
defective.
Replace the TD80 transmitter
with a serviceable unit that has
been programmed with same
information as the one it is
replacing.
c. The TD80 transmitter may be
incorrectly programmed.
Reprogram the transmitter with
correct information.
6. Finch Display shows incorrect volume.
a. The TD80 transmitter may be defective.
Replace the TD80 transmitter with a
serviceable unit that has been programmed
with same information as the one it is
replacing.
b. The TD80 transmitter may be incorrectly
programmed.
Reprogram the transmitter with correct
information.
c. Offset calibration may be required.
Perform the offset calibration.
7. Finch Display continuously shows “OFF” until a Display push button is
pressed.
a. Verify that the PTO signal is wired according
to the installation diagram
i. Inspect the wiring for correct installation
ii. Inspect for loose or broken wiring
iii. Correct all wiring errors and continue to
verify system operation.
b. Test the PTO or air brake controlled switch
for correct operation
Repair or replace the switch as necessary.
8. Finch Display shows erratic level measurements.
a. Finch Display shows erratic
level measurements while a
mobile radio is keyed or other
radio equipment transmits
Physically separate all TD80 system components and
wiring from the radio devices.
b. Finch Display shows erratic
level measurements or “2 LO”
while loading product.
Check placement of the probe
near inlet or agitator
The probe must be
relocated to an area of
the tank away from
turbulence while loading
or normal operation.
9. Relay Module Shutdown system does not permit
loading.