Omega LTUM1 Series, User Manual, Page: 7 / 11

7
5. Output Status
LTUM1 is equipped with two wires power supply. Relay output is connected in
two wiring power (L+/
–
) , which offers Min./ Max. modes according to different
pin numbers. When powered with 20 to 250
、
50/60 Hz Vac / Vdc, top of housing
would light up with blue LED.

Low (Min.) Mode: Tuning fork switch will be actuated 3 seconds after the
power is on. Relay is NO and red LED indication is off.
When tuning fork is covered by testing medium, vibration stops and relay
becomes NC. Red LED indication is on.

High (Max.) Mode: Tuning fork switch will be actuated 3 seconds after the
power is on. Relay is NC and red LED indication is on. When tuning fork is
covered by testing medium, vibration stops and relay becomes numbeR
Red LED indication is on.

Flashing red indicates abnormal: Possible causes overloads or short-circuit
load back, equipment malfunction or wear tuning fork probe.