Measurement Computing ZonicBook 618E rev.3.4 - Manual (Page 55)

ZonicBook/618E 878595 Analog Signals 6-7
Overrange Detection
Each of the 8 analog input channels (CH1 through CH8) is equipped with overrange detection circuitry. This
feature automatically indicates whether or not data exceeded the full-scale range. This detection is of importance
because overrange signals result in clipped data that significantly corrupts FFT analysis.
Overrange errors are indicated by a front panel LED and are also available through a software status request at the
end of an acquisition. When recognized, an error is latched until the commencement of a new acquisition.
Consequently, even intermittent faults are detected and communicated. However, an overrange event does not stop
the acquisition process or change the data.
An extension of the overrange capability could involve its integration into a process monitor application, whereby
the fault condition is used to monitor the stability of a previously characterized dynamic signal.
Simultaneous Sample and Hold (SSH)
All channels are sampled simultaneously, after which the ZonicBook/618E measures each output until all channels
are digitized. The time-skew between sampling on all channels is 100ns, regardless of the number of the number of
WBK18 expansion modules [up to 6] that may be connected to the ZonicBook/618E. This maximizes channel-to-
channel phase matching.
Transducer Electronic Data Sheet (TEDS) Support
TEDS, Transducer Electronic Data Sheet, is a software option that is available for purchase. The TEDS feature
enables a ZonicBook/618E or a WBK18 expansion module to access the calibration information that is stored
within TEDS-compatible sensors. Both ZonicBook/618E and WBK18 modules can read sensor calibration
information directly from sensor; and can then automatically scale the readings. TEDS support can easily be added
after the initial purchase of a ZonicBook/618E or a WBK18 expansion module. The TEDS option is discussed in
separate software documentation, when applicable.