Tektronix 485, Инструкция по эксплуатации

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RACKMOUNTING
Section 6—485/R485 Service
Introduction
The TEKTRONIX Type R485 Oscilloscope is designed
to mount in a standard 19-inch rack.
Rack Dimensions
Height. A t least seven inches of vertical space is required
to mount this instrument in a cabinet rack.
Width. Minimum width of the opening between the left
and right front rails of the rack must be 17-5/8 inches. This
allows room on each side of the instrument for the slide-out
tracks to operate freely, permitting the instrument to move
smoothly in and out of the rack.
Depth. Total depth necessary to mount the Type R485
in a cabinet rack is 19-3/8 inches. This allows room for air
circulation, power cord and the necessary mounting hard­
ware.
Slide-Out Tracks
The hardware provided for mounting the slide-out tracks
is shown in Fig. 6-1. Since the hardware is intended to
make the tracks compatible with a variety of cabinet racks
and installation methods, not all of it will be needed for
this installation. Use only the hardware that is required for
the mounting method used.
Fig. 6-2 shows the Type R485 installed in a cabinet-type
rack. The slide-out tracks provided with the Type R485
permit it to be extended out of the rack for maintenance or
calibration w ithout removing the instrument from the rack.
In the fully extended position, the Type R485 can be tilted
up so the bottom of the instrument can be reached for
maintenance or calibration. To operate the Type R485 in
the extended position, be sure the power cord and any
interconnecting cables are long enough for this purpose.
When not extended, the instrument is held in the rack with
four securing screws (see Fig. 6-2A).
The slide-out tracks consist of two assemblies—one for
the left side of the instrument and one for the right side.
Fig. 6-3 shows the complete slide-out track assemblies. The
stationary section of each assembly attaches to the front
and rear rails of the rack, and the chassis section is attached
to the instrument. The intermediate section slides between
the stationary and chassis sections and allows the Type
R485 to be extended out of the track. When the instrument
is shipped, the stationary and intermediate sections of the
tracks are packaged as matched sets and should not be
separated. To identify the left or right assembly note the
position of the automatic latch (see Fig. 6-3). When
mounted in the rack, the automatic latch should be at the
top of both assemblies. The chassis sections are installed on
the instrument at the factory.
Mounting Procedure
The front flanges of the stationary sections may be
mounted in front of (outside) or behind (inside) the front
rails of the rack, depending on the type of rack. If the front
rails of the rack are tapped for 10-32 screws, the front
flanges are mounted outside of the rails. If the front rails of
the rack are not tapped for 10-32 screws, the front flanges
are mounted inside the front rail and a bar nut is used. Fig.
6-4 shows these methods of mounting the stationary
sections.
Use the following procedure to install the Type R485 in
a rack:
1. Select the proper front-rail mounting holes for the
stationary sections, using the measurements shown in Fig.
6-5.
2. If the mounting flanges of the stationary sections are
to be mounted in front of the front rails (rails tapped for
10-32 screws), mount each stationary section as shown in
Fig. 6-4A.
3. If the mounting flanges of the stationary sections are
to be mounted behind the front rails (rails not tapped for
10-32 screws), mount each stationary section as shown in
Fig. 6-4B.
4. Refer to Fig. 6-6 to insert the instrument into the
rack. Do not connect the power cord or install the securing
screws until all adjustments have been made.
5. Position the instrument so the pivot screws (widest
part of instrument) are approximately even with the front
rails.
6. Adjust the alignment of the stationary sections
according to the procedure outlined in Fig. 6-7.
7. After the tracks operate smoothly, connect the
power cord to the power source.
6-1