Chronoskop CHR-9 Timegrapher
User manual
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9
2. Theoretic basics
2.1. Beats / Rate / Period Time
To calculate the rate deviation (R), the measured period is compared with the set or
determined reference value. The period or half-cycle duration is the average time between
beats.
Period duration is calculated as follows:
T
P
= (
T
TIC
+
T
TAC
) /
2
The number of beats per hour is called the Beat Number (BR).
2.2. Beat error
If the balance oscillates asymmetrically around the zero position, the period duration of
consecutive beats
T
TAC
and
T
TIC
is unequal. The beat error is calculated from the difference
between the half-wave durations and given in miliseconds.
Beat error is calculated as follows:
T
P
= (
T
TAC
–
T
TIC
) /
2
