LaserSpeed 8000/9000 I/O Module Instruction Handbook
Installation
Part No. 93342 / Drawing No. 0921-01516 Page 27 of 84 Revision E (Dec 2013)
Elongation/Differential Speed Calculation
Slave I/O Modules automatically transmit their gauge’s measured velocity out of
the SYNC port to the I/O Module connected to the SYNC IN connector. The
connected I/O Module receives this velocity and calculates elongation using the
following formula:
where:
V
1
is the velocity of the slave gauge
V
0
is the velocity of the master gauge (connected to the I/O Module that
is calculating elongation.
The figure above shows a typical elongation measurement system. The I/O
Modules are numbered 1-4, with #1 as the Master and #4 as the Last Slave. I/O
Modules 1-3 calculate elongation by:
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