18
Symptom Cause To Correct
Span Constant Span represents the length of the
belt span being measured in mm
The appropriate Span constant is
provided on drive design printouts
Can’t Obtain A Belt Tension Reading
Sensor is too far
away from belt sur-
face
Move sensor as close as possible
without interfering with vibrating belt
span
Belt is too loose to
generate frequency
signal
Tighten belt
Background noise
is excessive
Try using “Low” or “High” frequency
settings to filter our background
noise (press “0” for 1-2 sec for
menu)
Temporarily eliminate background
noise
Use inductive sensor instead of
microphone
Meter is set in the
incorrect frequency
range
“Standard” frequency range is gen-
erally best
With meter on, press “0” for 2 sec
and select “Standard”, or appropri-
ate frequency range
Standard (S) = 10 – 600 Hz
High (H) = 500 – 5000 Hz
Belt span fre-
quency is less than
30 Hz
Microphone performance is reduced
considerably at frequencies less
than 30 Hz
Use the inductive sensor for fre-
quencies down to 10 Hz
Excessive wind
is blowing across
Microphone
Shield or shelter microphone
Use inductive sensor
SonicTensionMeter_Manual_4_14.indd 18 4/26/14 9:09 AM
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