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5-8
PERFORMANCE TEST
5-9
The following t e s t c a n b e u s e d a s a n incom-
ing inspection check and appropriate portions of
the t e s t c a n b e repeated either t o check the oper-
ation of the instrument after repairs or for periodic
preventive maintenance t e s t s .
5-10 The performance check is made using a 115-
v o l t , 60-Hz (cps), single-phase input power
source.
The performance check
is
normally made
a t a constant ambient room temperature.
The tem-
perature range specification c a n b e verified by do-
i n g the performance check (except temperature
s t a b i l i t y check) a t a controlled temperature of
O°C and a t a controlled temperature of 50°C.
If
the correct r e s u l t
is
not obtained for a particular
.
c h e c k , d o not a d j u s t a n y controls; proceed t o
troubles hooting.
5-1 1 RATED OUTPUT, METER, AND OUTPUT
CONTROLS ACCURACY
5-12 Voltage.
To check t h e accuracy of the out-
put voltage, front panel voltmeter, and front
panel voltage controls, proceed a s follows:
a.
Connect the differential voltmeter, load
r e s i s t o r , and t h e attenuator t o the power supply a s
illustrated in Figure 5-2.
Load r e s i s t a n c e is ap-
proximately 320K ohms, 10 watts.
b.
Turn t h e front panel VOLTAGE RANGE
s w i t c h and VERNIER control until t h e front panel
voltmeter i n d i c a t e s exactly 1600 Vdc.
c. The differential voltmeter should indicate
1. 6
h
0. 32 Vdc.
5-1 3 Current.
To
check the output current capa-
bility of the supply, proceed a s follows:
a.
Connect the multimeter ( s e t t o the 10 mA
position) or another milliammeter i n s e r i e s with a
320K 10W load r e s i s t a n c e , and a t t a c h the s e r i e s
combination t o t h e output terminals.
b. Adjust the VOLTAGE RANGE switch and
VERNIER control until t h e front panel voltmeter
i n d i c a t e s 1600 Vdc.
c.
The multimeter should indicate 5 rnA.
5-1
4
LOAD REGULATION
5-15 To check constant voltage load regulation,
proceed a s follows:
a.
Connect differential voltmeter, load
r e s i s t o r and attenuator t o t h e power supply a s
illustrated i n Figure 5-2.
b.
Turn the front panel VOLTAGE RANGE
switch and VERNIER control until t h e front panel
voltmeter i n d i c a t e s e x a c t l y 1600 volts.
SUPPLY
MODEL 6515A
DIFFERENTIAL
VOLTMETER OR
OSCILLOSCOPE
Figure 5-2.
Line and Load Regulation, Test Setup
c.
Read and record voltage indicated on
differential voltmeter.
d.
Disconnect load resistor.
e.
Reading on differential voltmeter should
not vary from reading recorded i n s t e p
c
by more
than 160 mV.
5-1 6 LINE REGULATION
5-17
To check c o n s t a n t voltage l i n e regulation,
proceed a s follows:
a.
Connect variable auto-transformer be-
tween input power source and power supply power
input.
b.
Connect differential voltmeter, load re-
s i s t o r , and attenuator
as
illustrated in Figure
5-2.
c. Adjust variable auto-transformer for 105
Vac input.
d. Adjust front panel VOLTAGE RANGE
switch and VERNIER control until the front panel
voltmeter i n d i c a t e s exactly 1600 Vdc.
e.
Read and record voltage indicated on
differential voltmeter.
f.
Adjust variable auto transformer for 125
Vac input.
g.
Reading on differential voltmeter should
not vary from reading recorded i n s t e p e by more
than 160 mV.
5-1 8 RIPPLE AND NOISE
5-19 To check the ripple and n o i s e , proceed a s
follows:
a.
Connect 320K ohm, 10W load r e s i s t o r t o
the power supply output.
b.
Connect the o s c i l l o s c o p e (in s e r i e s with
a lpf capacitor rated for a t l e a s t 1600 Vdc) t o t h e
power supply output.
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