CALIBRATION (ROTARY KNOB)
MAINTENANCE & TROUBLE SHOOTING
INITIAL CALIBRATION
1. After installation with power supply, make sure no material within 300 mm around the probe.
2. Turn the "SENSITIVITY" to the "H" position (Figure 2).
3. Using flat-head screwdriver to turn "Coarse" clockwisely for adjustment until LED indicator is on.
4. Turn the knob clockwise from H position to 90% position about 1/2 circle (95% position) until LED
indicator shut off (Figure 3). Then, Initial calibration is complete. After that, please continue to next
step "SENSITIVITY ADJUSTMENT".
SENSITIVITY ADJUSTMENT
1. Make sure the "Indicator" sign does not light up, when the medium does not contact with the probe,
and vice versa, when the medium contacts or covers the probe, then the "Indicator" sign lights up.
2. Gradually, adjust the capacitance value (turn the knob clockwise to the "L" direction) until "Indicator"
light turns off.
3. Record the turning angle from "Indicator" sign lights up status to turn off status, then reset "SENSI
TIVITY ADJ" by turning the knob counterclockwise back for half of the recorded turning angle.
4. Based on the previous experience, 70% (Figure 4) adjustment position can be used to most of
mediums (Need to do INITIAL CALIBRATION first).
H
90
80
70
30
60
50
40
20
10
L
H
90
80
70
30
60
50
40
20
10
L
H
90
80
70
30
60
50
40
20
10
L
Figure 3
Figure 2 Figure 4
Circumstance Possibility Cause Trouble Shooting
Water get into
housing
Enclosure is not firmly locked Lock the enclosure firmly
Seal ring aged & failed Replace seal ring
Cable entry is not firmly locked Lock the cable entry firmly
Cable entry does not face down Turn the cable entry & face down
Cable wire does not connected
downward Connect the cable downward
Diameter of cable wire does not fit Replace cable with diameter 8mm~10mm
Sensivity Adjustment knob
is activated by mistake
False wiring of power & signal cable
Circuit damaged by EMI
Dielectric constant of medium
is too small.
Humidity inside tank is over limit
Probe contacts with tank wall
Re-adjust sensivity
Re-wiring according to wiring guide
Replace with anti-static model
Contact your local business representative.
Replace probe with coating
Re-install and avoid grounding
Circuit damaged by EMI
Dielectric constant is over limit
Replace with anti-static model
Contact your local business representative.
Wiring terminals are loose
Process connection is not
firmly locked
Lock screw bolt firmly
Lock thread or flange firmly
Short-circuit due to aging
Abnormal of supply voltage
Revise external layout
Restore power supply
Level up & down but
switch / relay no response
Level up & down but
switch on/off
continuously
non-stop or relay
can't be reset
Loose structure due to vibration Replace with remote model
Unstable switch signal.
Inspection / Evidence
Enclosure is loose
Seal ring aged
Cable entry is not firmly locked
Cable entry faces up
Cable wire is connected upward
Cable wire is loose
Position of Sensivity Adjustment
knob is abnormal
False wiring of power & signal cable
Dry powder or high speed frictioin
Continuous action when
coarse or fine adjustment
Probe with water or dew
Probe contacts with tank wall
Dry powder or high speed frictioin
Continuous action when
coarse or fine adjustment
Loose screw bolt
Loose thread
Idle loop, resistance abnormal
Supply voltage over limit
Obvious vibration environment
08-SA27-B10-EM,03/08/2023
Tel: 886-2-22696789 Fax: 886-2-22686682
Em a il: in f o @ f in e -t e k. co m h t t p : / / w w w. f in e - t e k. co m
No.16, Tzuchiang St., Tucheng Industrial Park, New Taipei City 23678, Taiwan.
F i n e Te k C o L t d. , .
