20
Symptom Cause To Correct
Belt is too loose to
generate frequency
signal
Tighten belt
Multiple Belt Tension Readings Are Significantly Different
Belt tension is near
absolute minimum
threshold
Tighten belt and see if reading varia-
tion is reduced
Some tension
reading variation is
normal
It is normal for the meter to detect
slightly different fundamental span
frequencies
Take at least three tension readings
and average the results
The drive has been
rotated between
readings
Belts must fully seat on pulleys /
sheaves and equalize for tension to
stabilize
Pulley / shaft eccentricity can
change belt tension significantly;
establish minimum / average / maxi-
mum tension level limits and set belt
tension accordingly
Meter Displays Tension In Wrong Units
Meter is set if
incorrect unit mode
With the meter powered off, press
“0” and “9” and “Power” at the same
time and then select the desired
display unit (N / kg / lb) by pressing
“SELECT”
Meter Readings Seem Incorrect
Incorrect belt con-
stants may have
been entered
Use correct mass, width, and span
constants
Press “Select” and toggle through
data memory registers to select
another data set
The tension of a
non-Gates belt is
being measured
Mass constants for non-Gates belts
must be derived experimentally
An unrelated com-
peting frequency
signal may be
picked up
Temporarily eliminate noise
Try using low or high frequency set-
tings to filter out background noise
Use inductive sensor
SonicTensionMeter_Manual_4_14.indd 20 4/26/14 9:09 AM
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