CoCo-80 User Manual
72
and the hardware can be damaged. This must be avoided to protect the hardware
from permanent damage.
DC-Single End
DC-Single End allows measurement of signals with a DC component and uses
single ended input mode. Single ended mode is recommended for most cases and
when no CMV exists. This is the case when measuring the output of sensor
amplifiers. A CMV will produce noise in single ended mode.
AC-Differential
AC-Differential applies a high-pass filter with a low cutoff frequency to the input,
filtering the DC component of the signal. The result is a zero mean signal. This is
most commonly used for dynamic signals with CMV.
AC-Single End
AC-Single End mode combines the AC high-pass filter with single ended mode.
This is most commonly used for dynamic signals with no CMV such as measuring
the output of an amplifier.
IEPE (ICP)
The CoCo supports IEPE constant current output type for its input channels. The
built-in circuit is powered by a 4mA constant current source at roughly 21 Volts.
IEPE refers to a type of transducer that is packaged with a built-in current source.
IEPE is an acronym for Integral Electronic Piezoelectric. IEPE requires an AC
filter so DC measurements are not possible when IEPE is enabled. CoCo has a cut-
off frequency of 0.3Hz@-3dB for the IEPE input mode.
CoCo can automatically detect the IEPE sensor connection when the IEPE input
mode is enabled. The sensor indication is shown in following three modes:
A green IEPE sign indicates that the IEPE is set in the channel table and the IEPE
sensor is detected; a red IEPE sign with a strike-through indicates that the IEPE
mode is set in the channel table but the sensor has not been detected. The empty
space means that this channel is not set to IEPE.
CoCo-80 Output Connections
The CoCo-80 includes one output channel that can act as a function generator to
provide a variety of waveforms synchronized with the input channel sampling
rate. The output channel is a SMB mini-jack. A SMB-to-BNC adaptor is provided
with the unit. For each waveform the parameters such as amplitude and
frequency can be specified with the Output Parameters screen menu located in
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