50-608 Kotron Model 811 RF Point Level Sensor
11
4.2 Potentiometers
a. Time Delay
• Allows continuous adjustment of time delay within
limits of DIP switch range chosen
• Clockwise rotation increases delay.
b. Differential
• Allows continuous adjustment of pump or valve
control ON to OFF.
• Clockwise rotation increases differential. Full coun-
terclockwise rotation is the narrowest differential and
is used for alarm applications.
c. Coarse
• Allows continuous adjustment of setpoint over the
entire range of the electronics (0 to 1000 pF).
• Clockwise rotation raises SETPOINT on probe.
d. Fine
• Allows precision adjustment of SETPOINT within
the limits of the COARSE SETPOINT adjusted
initially.
• Clockwise rotation raises SETPOINT on probe.
• This is an extremely fine adjustment. Sometimes it is
necessary to go 1 to 2 turns past the final SETPOINT
to stop relay chatter. A small amount of time delay
(2 turns) can also be used.
5. The LED shows the status of the relay coil.
LED on = relay energized LED off = relay de-energized
6. Initial Settings
a. Turn the COARSE, FINE, DIFFERENTIAL and TIME
DELAY POTENTIOMETERS fully counterclockwise
25 full turns or until a clicking sound is detected.
b. Turn FINE control approximately 12 turns clockwise
to the midpoint.
c. Set the DIP switch positions 3 ON, 4 OFF. (Note that
if DIP switch positions 3 and 4 are both ON the LED
and relay will remain on.)
1.8.2 Low Level Alarm
Fail-safe Low – with no media on the probe:
1. Set DIP switch positions 1 OFF, 2 OFF, 3 ON and
position 4 OFF. LED will be ON.
2. Turn the COARSE control clockwise until the LED
turns OFF.
3. Slowly turn the COARSE control counterclockwise until
the LED is on.
4. Turn the FINE control clockwise until the LED stays OFF.
