LMD222 and LMD224 Series
Operations Manual
Eberle Design Inc.
Page 6
2.4.2 RETUNE OR RESET A CHANNEL
Press the MODE and FREQ buttons simultaneously to reset the channel. This will clear any
previous loop fault indication and cause the channel to retune.
2.4.3 FACTORY DEFAULT SETTINGS
Press the Channel 1 MODE and FREQ buttons simultaneously while first applying power to
the unit to reset all channels to the factory default settings.
Factory Defaults
Sensitivity Level
6
Operational Mode
Short Presence
Frequency Level
High
2.5 LOOP FAULT MONITORING
The LMD Series Loop Monitor continuously checks the integrity of the loop. The system is
able to detect open circuit loops, shorted loops, or sudden changes in inductance
exceeding 25% of the nominal inductance.
2.5.1 CURRENT FAULT
If a fault is detected, both the DET (Red) and FLT (Yellow) LEDs continuously emit a
sequence of flashes and the DEFLECTOMETER will display the letter “F”. Each type of
fault is identified by a different flash sequence followed by a one second pause:
Flash Sequence
Fault
1 flash
Open Circuit Loop (or Inductance too high)
2 flashes
Shorted Circuit Loop (or inductance too low)
3 flashes
>25% Change in Inductance
2.5.2 PREVIOUS FAULT
If the fault condition is removed, the DET indicator and the channel output will return to
normal operation. The FLT indicator will continue to flash indicating that a fault had
previously occurred. This Previous Fault indication may be reset by momentarily pressing
the MODE and FREQ buttons simultaneously. See section 2.4.2.
