Spider DSA User’s Manual
283
Limit Check Switch: Turns ON or OFF the limit checking capability of the test.
Limits can be enabled on all the order analysis signals to trigger a user defined
event when the signal crosses a limit. The limits can be defined individually for
each signal. Limit functionality will be revisited later in this section. This button
determines when the limit checking is enabled.
Setup Tachometer navigates to the “Tachometer” section of Test Configuration
page where the parameters for the tachometer channel(s) can be set.
There are tabs on the bottom of the control panel for viewing different pages of
information. The Cursor tab shows the abscissa and ordinate values for all
displayed cursors and peak and harmonic markers.
There are Input, Output, and Cursor tabs. The Input tab is shown above. The
Output tab controls the output function generator. Cursor shows the details of the
cursor when a cursor is placed on displayed signal.
On the very bottom of the control panel the system connection status is shown,
along with any messages related to test events.
Tachometer Setup
Spider-80X units are capable of handling two tachometer channels. The 7.5
hardware units have dedicated tachometer 1 to perform Order Analysis and
tracking as well as RPM measurement and recording. Tachometer channel 2 only
performs RPM measurement and recording. The 7.4 hardware units can have any
of the input channels up to two can be used as the tachometer channel(s) with one
of those channels being used to perform the order analysis.
In 7.4 hardware units, only 1 0r 2 input channels from the master module can be
used as a tachometer channels. In version 7.5 hardware units, only the
tachometer channels from the master module can be used as tachometer
channels.
Tachometer parameters need to be set for the tachometer to detect the
tachometer pulses correctly and generate an accurate RPM signal.
To setup or modify the tachometer settings, click on “Config” from the Control
Panel and select “Analysis Parameters” on the left or click on “Setup Tachometer”
from the control panel function buttons. They both open the same page which is
shown below:
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