Kaman KDM-8206 - Manual (Page 17)

Kaman Precision Products PART NO: 860516-001
www.kamansensors.com Last Revised: 6/20/2011
17
PART 5 – SYNCHRONIZING MULTIPLE MEASURING
CHANNELS
When sensors are used in close proximity to one another, performance will be compromised unless
the Measuring Channels are synchronized. Performance degradation is due to interaction of the
sensor fields and is likely to appear as a low frequency oscillation on the output signal. In general,
sensors located adjacent to each other with less than 3x sensor diameter spacing will require
synchronization.
When inserted into a Kaman supplied rack enclosure, the KDM-8206 Eurocard systems are
automatically synchronized together. The Eurocard on the left side of the rack (when viewed from the
front) is the master. All Measuring Channels to the right of the master become slaves. No
modification to the Measuring Module is required. Measuring Modules sense the presence of an
input oscillator signal on pin A28 of the Euro connector. A slave channel will then use the input
oscillator signal rather than the signal from its own oscillator to excite the sensor connected to that
channel.
If the signal from a master channel is lost, the next measuring channel in the sequence assumes the
function of a master.
When supplied as part of a rack assembly, measuring channels are calibrated in the rack. To
maximize performance accuracy, measuring channels should be used in the same rack slot where
they were calibrated
.