8502^
CHARACTERISTICS (Continued)
DC Volts
(Continued)
RESPONSE
TIME
Analog Settling Time Within Voltmeter
Reading Rate
50
Hz
line 4Samt
60 Hz line
4 Samples/Rdg
32 Samples/Rdg
128 Samples/Rdg
4
Samples/Rdg
32 Samples/Rdg
128 Samples/Rdg
22 ms
162 ms
642
ms
18 ms
136 ms
546 ms
Filter Mode
Filter, Fast
Bypass
Bypass
Filter, Slow
Bypass
Bypass
Step input
to
0.01% of Change
40
2
2
400 ms
2 ms
2
ms
Step Input
to
0.001% of Change
50
20
20
500
20
20
I I
*Numher
of
samples per reading is programmable
from
I
(2°)
to 131,072
(2^
'^)
in 18 binary steps.
ZERO STABILITY
OVERLOAD
Better than
5
juV for
90
days after
a one hr.
warm-
up. Front Panel pushbutton auto zero is provided.
The
zero correction is
stored in memory
until
power is interrupted or the 8502A is
RESET.
If calibration memory Option
--04
is installed, the
zero correction
is
retained.
±1200V DC, 1200V peak
to 60
Hz,
or 1400V peak
above
60
Hz may
be
applied
continuously to any
dc range without
permanent damage. Maximum
common mode
rate of voltage rise is
1
000V//usec.
50
Hz
Fast Filter
50
Hz
Slow Filter
60
Hz
Fast Filter
60
Hz
Slow Filter
90 dB
95 dB
100 dB
100
dB
at
60
Hz
for
1 KO un-
balance
Sum of
Common
Mode
Re-
jection
and Nor-
mal Mode
Rejection
128 SAMPLES/READING
Typical
Performance with
60
Hz Line
(Combined digital
and analog filtering)
Cusps shown are at multiples of 60
Hz
line frequency.
Similar
cusps (not shown} occur every VA
Hz.
Slow Filter
Fast Filter
-40
dB
-100
dB
-120
dB
10 100
240 1K
F (Hz)-^
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