Clavis Type 7 - Calibration and Certification; Spot Check Calibration Procedure

15
7.0 Calibration
7.1 Spot check
The measurement system of the CLAVIS Belt Frequency Meter is based upon a
very stable quartz crystal that should never wander. However, a precision
mechanical resonator (tuning fork) is included with the meter so that a
calibration check at a spot frequency of 250 Hz may be performed at any time.
Tap the tip of the
tuning fork on a
hard surface and
then hold STEADY
in front of the
optical sensor at a
distance of 10 to
15 mm. The meter
will measure a
frequency of 250
Hz thus
demonstrating that
it is in calibration.
Results within ±1% are acceptable. There is no adjustment possible. If greater
variance is experienced, the meter should be returned for calibration. See
section 7.2 for manufacturer’s contact information.
Tap the tip of the
tuning fork on a
har
d s
urf
ace
an
d
the
n h
old
ST
EAD
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Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
in front of the
optical sensor at
a
distance of 10 to
15 mm. The mete
r
wil
l m
easure a
fre
que
ncy
of 250
Hz
thu
s
demonstrating that
it is in calibration.
Tap the tip of the tuning fork and hold steady
between the jaws of the acoustic sensor. The
meter will measure 250Hz.