Measurement Computing ZonicBook 618E rev.3.4 - Manual (Page 58)

6-10 Analog Signals 878595 ZonicBook/618E
LEDs
The right-hand side of the ZonicBook/618E front panel includes 19 indicator LEDs. The WBK18 expansion
modules have identical LEDs on their front panels. There are eight Transducer Fault LEDs (1 for each channel),
eight Overrange LEDs (1 for each channel), an Active LED, Ready LED and a Power LED. The indicators have
the following meanings.
Transducer Fault
(1 LED per Channel)
This feature applies on a per channel basis when the ICP software selection is active. When
lit, a Transducer Fault LED indicates that the transducer for the associated channel has either
an open circuit or a short circuit. In addition to LED indication, transducer fault information
is available through a software status request at the end of an acquisition. Faults are detected
and communicated when present. They are not latched. Detection of a fault does not alter the
acquisition process or its data. For related information refer to Current Source with
Transducer Fault Detection on page 6-3.
Overrange
(1 LED per Channel)
When lit, an Overrange LED indicates that the associated channel’s input signal has exceeded
the input full-scale range. Even a momentary exceeding of the range limit will cause the LED
to light. This indication is important because overrange signals result in clipped data that
significantly corrupts FFT analysis. In addition to LED indication, the overrange condition is
available through a software status request at the end of an acquisition. Overrange errors are
latched until the commencement of a new acquisition. Consequently, even intermittent faults
are detected and communicated. Overrange events do not stop an acquisition or alter data.
Active Lights when data is being converted.
Ready Lights when the ZonicBook/618E’s dynamic conditioning circuit [or WBK18] has established
communication with the ZonicBook/618E’s DSP (Digital Signal Processor).
Power Lights when power to the unit is turned on and power is available to the unit.