Section VI - Servicing
Enter the span length:
S = ____.__mm
The span length represents the distance
between the contact points on adjacent
sprockets/pulleys/sheaves. This distance is
given in mm for each Beta unit.
Measurement
Press the “MEASURE” key and the green
LED light will begin flashing. Tap the belt
span to make the belt span vibrate. Hold
the sensor approximately cm (0.4 inch)
from the belt or closer without touching
the belt. The green LED light will continue
to flash until a signal is received by the
sensor, then the green LED light will turn
off and a wave-form graphic will appear
on the LCD screen. After the signal is
processed, the measured belt tension is
displayed, the meter beeps three times,
and the green LED light turns on indicating
a successful tension measurement. After
a tension reading has been obtained,
pressing the “Hz” key toggles the LCD
display output between tension, frequency,
or both. If the belt signal cannot be
measured, or the measured frequency
or the calculated belt tension is out of
the range of the meter, the red LED light
will turn on. When this occurs, either the
tension or frequency fields may also display
ERROR. To make another tension reading,
simply tap the belt again. The auto-trigger
feature will automatically re-activate the
meter without pressing the “MEASURE”
key.
Tension Display
T = ______ Kgf or lbf or N
The displayed output of measured
force can be switched between units
of Kilograms force, Pounds force, and
Newtons. This can be accomplished as
follows:
With the unit powered off, press the “0”
and “9” and “Power” keys at the same
time. The meter will then turn on with
the current unit of measure displayed.
Units can then be changed by pressing
the “SELECT” key until the desired
unit appears. Press and hold down the
“POWER” key again until the meter turns
off. Now turn the meter on for normal
operation. Data entered into the unit must
still be in SI units of millimeters and grams.
Frequency Display
F = ___Hz
Pressing the “Hz” key toggles the LCD
display output between tension, frequency,
or both.
Measurement Errors
If either the calculated belt tension or
measured frequency cannot be displayed
the red LED light will turn on and the
LCD screen may display “ERROR”. If an
error has been made in the measurement,
“ERROR” will be displayed. Check the
accuracy of the mass constants, width and
span values and retry the measurement
until a tension or frequency value is
displayed. With the auto-trigger feature it
is not necessary to press the “Measure”
key again. When a tension or frequency
reading is obtained, take at least two
additional readings for comparison.
Three readings in relative close proximity
indicate reasonably accurate belt tension
readings. Tension measurements made
on belts at very low tensions may yield
greater variability and a greater probability
for errors. If a tension reading cannot
be obtained, the belt may be too loose
to generate a clear harmonic frequency
signal. If this is the case, the belt may need
to be tightened in order to obtain a tension
reading. The optional Inductive Sensor
is more effective at very low frequencies
than the conventional microphone sensors,
and may provide better results. NOTE:
Frequency only readings must have data
values in the storage registers or the
meter’s red LED light will stay on.
Quincy Compressor-QGB
™
49
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