BSA Flow Software Installation and User's Guide - CSI

Cycle length
The property Cycle length can be set to either in degree (angle binning) or
in time (Time binning). With time binning, the Cycle length is the time
between two reset pulses and with angle binning, . It determines whether the
time between two Reset-pulses should be interpreted as 360° (default) or
720°, the latter being relevant for example in four stroke engines, where one
full cycle correspond to two revolutions of the crankshaft.
Note: Please note that Cycle length = 720 deg does not accept two reset-pulses
within each cycle, even if a full cycle corresponds to two revolutions of the
crankshaft: There is no way to tell, which reset-pulse indicates the start of a
cycle, and which one is a “halfway marker”. Instead the shaft encoder
should be connected to the camshaft, or a 2:1 gearing mounted between the
crankshaft and the encoder, to yield only one reset pulse per cycle.
Sub-cycles
Synchronisation mode
The property Sub-cycles is an integer with the default value 1. It is
typically used for measurements on propellers and the like, where the
number of sub-cycles correspond to the number of blades on the
propeller.
Figure 6-45 Sub-cycles = 3 for same data as in Figure 6-41
In the example in Figure 6-45 the 3 blades are merged into one, with a
resulting full cycle length of 360°/3 = 120°.
The property Synchronisation mode is a read-only property indicating
whether phase sorting is done on the basis of arrival time or encoder pulses.
The property is set to Encoder count if Reset Encoder and Encoder inputs are
enabled, and to Internal clock if Reset Encoder is not enabled, meaning that
the phase sorting is done based on arrival time.
If both Reset Encoder and Sync 1 are enabled, the synchronisation mode is
set to Encoder count.
BSA Flow Software:Options and Add-ons 6-43