Section Iii, Operation - HP 7414A Operating And Service Manual

Section III
Operation
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Model 7414A
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1. RECORDER POWER SWITCH: Press to apply
power; press to remove power. Back-lighted with
power applied.
2.8800-SERIES PREAMPLIFIERS: Refer to the
individual instruction manuals for control infor-
mation.
3. MODE CONTROL BUTTONS: Pressing the
STDBY button holds the styli of all channels at
chart center during Recorder operation. The
REMOTE button transfers control of the Recorder
"run mode" to a remote location. The RUN
button starts the chart drive, applies heat to the
styli and signals to the recording circuits.
4. SPEED MM/SEC CONTROL BUTTONS: Nine
speed selection buttons select standard chart
speeds from 0.25 to 100 mm/second. Button
remains depressed to indicate selected chart speed.
5. TIMER BUTTONS: The OFF button-turns off the
interval timing marker. The SEC button selects
timing marks at 1-second intervals. The MIN
button selects timing marks at 1-minute intervals.
The EVENT MARKER button applies a marker
pulse when pressed, to mark events in the process
being recorded.
6. STYLUS HEAT CONTROLS: Individual controls
adjust the heat at each stylus tip, and thereby the
trace width. More stylus heat is generally required
for high-frequency signals than low-frequency
signals. Once adjusted, stylus heat is automatically
regulated to compensate for changes in chart paper
speed.
7. PAPER TAKEUP DRAWER (CART): The takeup
drawer pulls out to receive used chart paper. For
Bench Top Enclosure models, a paper takeup shelf
is provided. Install as shown in Figure 3-2.
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Figure 3-1. 7414A Recording System, Control Locations
07414-1
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