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Front Panel
Internal Status Indicators
A series of Light Emitting Diode (LED) indicators are
mounted on the circuit board inside the console, but are
visible through a window cutout in the rear panel. These
indicators report the condition of power supply voltages,
the pass/fail condition of some CPU functions during the
Self-Diagnostic Test, and on the activity of CPU circuits
during normal operation. Refer to Chapter 8, Mainte-
nance, for a detailed description of the Status LEDs.
Recorders
You have a choice of using an X-Y recorder or a strip
chart recorder as a readout device. The X-Y recorder al-
lows two test parameters, often Load versus Strain, to be
plotted against each other. A strip chart recorder, on the
other hand, plots one parameter versus time. Since cross-
head speed can be converted directly into time, the
speed of the strip chart can be correlated with crosshead
speed and a plot of a test parameter, such as Load or
Strain, versus crosshead speed can be obtained.
Load and strain ranging are performed at the front panel
of the recorder itself. This allows you to select an operat-
ing range for each parameter from a predefined list of
gain factors. The operating range of the recorder is de-
fined as the percentage of the maximum capacity of the
installed load cell that causes a full scale reading on the
recorder.
The specific recorders available for the Series 4400 Test-
ing System are:
XY/YT Plotter
1-12
M10-94400-1
Cat. No. 2310-901
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