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SANBORN DUAL CHANNEL DC AMfLIF JER
MODEL 150-2000
6.
OPERATIO~T.
RECORDING WITH THE DUAL CHANNEL DC AMPLIFIER
1.
After warmup and calibration, set the RANGE switch to OFF and set
the stylus base-line with the POSITION control.
If
the signal
has both positive and negative values, set the stylus near mid-
scale.
If
the signal is of one polarity only, set the stylus near
one edge of the recording chart.
2.
Now turn the RANGE switch to the right until the signal gives a
reasonable stylus deflection, and start the Recorder in motion.
Set the STYLUS TEMP control for the best definition.
Normally a
slight increase in temperature improves the definition when recording
high frequencies.
Writing the RANGE setting and paper speed on
the chart avoids confusion when interpreting the record later on.
7.
MAINTENANCE:
ADJUSTING THE DAMPING CONTROL
This adjustment may be required after extended operation, or after a
tube or other component is
~placed.
1.
Apply a square voltage pulse to the input with a voltage supply,
potentiometer, and switch circuit.
2.
Adjust the potentiometer and the RANGE switch for one centimeter
of deflection when the signal pulse circuit is closed.
3.
Adjust the DAMPING control for the best possible square wave on
the recording.
3
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