Tektronix 503, Инструкция по эксплуатации

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Calibration— Type 503
Fig. 6 -6 . T o il equipm ent setup fo r pow er supply i i DDi .
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6. Check Power Supply Ripple and Regulation
a. Test equipment setup is shown in Fig. 6-6. The Type
503 control settings remain as in Stop 1.
b. Sot the DC voltmeter to the appropriate scale and
connect the leads to tbs — 100 volt test point and chassis
ground.
c. Set the tost oscilloscope vertical deflection sensitivity
to 10 millivolts/cm, AC coupled, and the sweep »ime/cm
to 5 milliscconds/cm.
d. Connect the I X probe to the — 100 volt test point.
e. Vary the aulotransformor output voltoge between 105
and 125 volts while monitoring the DC voltmeter and the
test oscilloscope.
I. Check— The — 100 volt supply should remain within
the ± 2 % tolerance from the 105 to 125 V setting of the
autotransformer; the 120-Hz ripple should not exceed 15
millivolts.
g. Repeat steps (b) through (e) for the + 12.6 V, + 100V,
and +250 V supplies, checking for regulation and 120 Hz
ripple tolerance as indicated in Table 6-1.
C AU TIO N
Do not atte m p t to check the rip p le on the — 3 0 0 0
v o lt supply, as the in p u t v o lta g e ro tin g on th e test
oscilloscope w ill be exceeded.
h. Move the 1 X probe to the — 100 V test point indicated
in Fig. 6-7. (The test points indicated in the figure were
selected to avoid excessive 30 kHz ripple from the 30 kHz
power oscillator.)
TABLE 6-1
Power
S upply
V o lta g e
V o lta g e
Tolerance
Ripple
Tolerance
120 Hz 30 kHz
- 1 0 0 V
± 2 V 15 mV
5 mV
t 126 V
‘ 1 26 V
15 mV
5 mV
+ 100V
± 5 V
15 mV 5 mV
+ 250 V
± 1 2 .5 V
50 mV
20 mV
Fig. 6 -7 . Tost p o in t lo ca tio n * fo r checking 30 k H i pow er supply
rip p le .
©
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