Operating Instructions—Type 422 AC-DC
Fig. 2-5. Securing the power cable to the power supply for remote
operation.
Press in here on feofh
sides of the instrument to
position handle.
Fig. 2-6. Handle positioned to provide a stand for the instrument.
OPERATING TEMPERATURE
General
The Type 422 with AC-DC Power Supply requires very
little air circulation for proper operation. Thermal cutouts
in the indicator and the power supply provide thermal pro
tection and disconnect the instrument power if the inter
nal temperature exceeds a safe operating level. Power is
automatically restored when the temperature returns to a
safe level. The Type 422 with AC-DC Power Supply can be
operated where the ambient air temperature is between
—15°C and +55°C (+40°C maximum with battery pack
installed). This instrument can be stored in ambient temper
atures between ~55°C and +75°C (—40°C to +60°C with
batteries). After storage at temperatures beyond the opera
ting limits, allow the chassis to come within the operating
limits before power is applied.
Operating Position
The handle of the Type 422 can be positioned for carry
ing or as a tilt-stand for the instrument. To position the
handle, press in at both pivot points (see Fig. 2-6) and turn
the handle to the desired position. Several positions are
provided for convenient carrying or viewing. The instru
ment can also be set on the rear-panel feet either for opera
tion or storage.
CONTROLS AND CONNECTORS
General
A brief description of the function and operation of the
controls and connectors of the Type 422 follows. Fig. 2-7
shows the front panel of this instrument More detailed
information is given in this section under General Operating
Information.
Cathode-Ray Tube (CRT)
INTENSITY Controls brightness of display.
FOCUS Provides adjustment for optimum dis
play definition.
ASTIGMATISM Used in conjunction with the FOCUS
control to obtain a well-defined dis-
play.
SCALE ILLUM Controls graticule illumination.
Vertical (both channels if applicable)
VOLTS/DIV Selects vertical deflection factor in
1-2-5 sequence (VARIABLE control
must be in CAL position for indicated
deflection).
VARIABLE
UNCAL
POSITION
GAIN
Provides variable uncalibrated deflec
tion factors between the calibrated set
tings of the VOLTS/DIV switch.
L ig h t indicates that VARIABLE
VOLTS/DIV control is not in the CAL
position.
Controls vertical position of the trace.
Screwdriver adjustment to set gain of
the vertical input amplifier.
m
2-7
To Next Page
Loading...
