Measurement Computing eZ-TOMAS version 7.1.x - Manual (Page 33)

eZ-TOMAS & eZ-TOMAS Remote 887591 Edit Menu 3-7
INT/DIFF This column is used for setting a single or double integration, or a single or double
differential. It can be used for the following three types: Accelerometer, Velocity,
Displacement.
Note that the integration value (g’s/ips/mils, g’s/ips/in, or g’s/mmps/mm) is selected in
the Acquisition Tab.
Possible INT/DIFF column selections for Accelerometer, Velocity, and Displacement are:
Accelerometer Velocity Displacement
None
Single Integration
Double Integration None
Single Integration
Single Differential None
Single Differential
Double Differential
Comments:
(1) If the signal is acceleration
(2) If the signal is
, then single integration results in velocity; and
double integration results in displacement.
velocity
(3) If the signal is
, then single integration results in displacement; and
single differential results in accelerometer.
displacement
mV / EU
, then single differential results in velocity; and
double differential results in accelerometer.
is the instrument sensitivity. (Typical displacement probes: 200 milli-Volts per mil.
Typical accelerometer probes: 100 milliVolts per G. For Tach probes
enter 1000.) For static channels, this property represents the slope variable (m) of the
linear equation y = mx + b.
Offset Sets the offset factor that is to be applied to the Engineering Units.
FSV FSV (Full Scale Voltage) is the maximum input voltage for the instrument. If you are
unsure of the instrument’s maximum voltage value, select a high voltage value.
IEPE A constant bias current is available for IEPE (ICP) transducers that are used as signal
input for many IOtech devices. The bias current is sourced through the center conductor
of the input channel BNC connector and returns to the analyzer via the BNC’s outer
conductor. Consult your hardware manual for applicability.
The current source features an operating compliance voltage (see product specifications)
and is protected in regard to both short-circuit and overvoltage. Operating compliance
refers to the highest voltage that can be applied without change of the current source
value. In the absence of a transducer, the current source will output an open circuit
voltage. For applications that do not require bias, the current source can be disconnected
from the input by un-checking IEPE in the Input Channels tab on a per-channel basis.
When the IEPE cell is checked for a channel, the current source is enabled and the input
voltage is continuously monitored with level detection circuitry. Recognition of a voltage
slightly greater than compliance voltage (transducer open) or a very low voltage
(transducer short) triggers a transducer fault condition for the affected channel. When the
IEPE function is not available to a channel a dash appears in the IEPE column of the
associated channel.