Tektronix 516 series, Инструкция по эксплуатации

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Power Requirements
The Type 516 Oscilloscope line transformer can be wired
for proper operation of the instrument on nominal line volt­
ages of 110, 117, 124, 220, 234, and 248 volts at line fre­
quencies of 50 to 60 Hz. Fig. 2-1 shows the transformer
primary connections to be made for each line voltage.
Pig. 2-1. Power Transformer prim ary connections.
Proper regulation of the oscilloscope power supplies will
be maintained at line voltages between 105 and 125 volts
when the instrument is wired for a nominal voltage of 117
volts, and within proportionate limits when it is wired for the
other nominal line voltages.
When the Type 516 is supplied with a dc fan and the
associated rectifiers (circuit D646 on the Power Supply cir­
cuit diagram), it can be operated at any line frequency
S E C T I O N 2
P R E L I M I N A R Y
I N F O R M A T I O N
from 50 Hz to 400 Hz, although slightly higher line volt­
ages are required at the higher line frequencies. Normally,
the Type 516 Oscilloscope with the dc fan will operate
satisfactorily on a 400-Hz line voltage of 117 volts when
the primary of the line transformer is connected for 110-
volt, 50-to-60 Hz operation, as shown in Fig. 2-1. For
maximum dependability and longest life, is is recommended
that the line voltage be kept at or slightly below the
nominal.
Fuse Requirements
When the Type 516 Oscilloscope is connected for 110-,
117-, or 124-volt operation, a 3.2-amp slow-blowing type fuse
should be used. When the instrument is connected for
220-, 234-, or 248-volt operation, a 1.6-amp slow-blowing
type fuse should be used.
Cooling
Your Type 516 Oscilloscope will last much longer if you
keep it as cool as possible whenever it is being operated.
A fan provides cooling by drawing air in through a filter at
the rear of the instrument and blowing it over the internal
components. The instrument must be placed such that the
air intake is not blocked, and the air filter must be kept
clean to permit adequate air circulation. Instructions for
replacing and cleaning the air filter are given in Section 5
of this manual.
Furthermore, the side panels of the Type 516 Oscilloscope
are designed to promote maximum air circulation over the
internal components where the most heating takes place.
For this reason, the instrument should not be operated for
long periods of time with the side panels off. Also, there are
differences between the right-hand side panel and the left-
hand side panel, so they must be mounted on the proper
sides. Fig. 2-2 shows the two sides of the oscilloscope with
the side panels correctly mounted.
If the temperature inside the instrument should become
so high that it might cause immediate damage to com­
ponents, a thermal cutout switch will disconnect the power.
When the temperature drops to a safe level, the switch will
again close automatically; no manual reset is necessary.
Fan Connections
The manner in which the fan is wired in the Type 516
Oscilloscope depends upon the line voltage for which the
instrument is wired. For 110-, 117-, and 124-volt operation,
the black fan lead should be connected to the third notch
of the 11-notch ceramic terminal strip at the right rear of the
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