Fluke 8505A - Page 6

8505A
Table
1-3.
Specifications
(cont)
Operating Characteristics
TEMPERATURE
COEFFICIENT:
±(%
of Reading
+ Number of Counts)/°C
RANGE
0°C
TO
18°C
AND
28°C
TO
50°C
100 mV 0.0003
+ 5
IV 0.0003 + 1
10V 0.0002 +
0.5*
100V
0.0003
+ 1
1000V 0.0003
+ 0.5
’Multiply Number of Counts by 10
for
AVG operating mode (7Vfe-digit).
INPUT BIAS CURRENT
AT TIME OF
ADJUSTMENT 1-YEAR
23° C ±1°C TEMPERATURE COEFFICIENT
<±5
pA
<±30
pA
<±1
pA/°C
ZERO
STABILITY
Less than
5
/iV for
90
days after a four-hour warm-up. Front panel
pushbutton zero is provided for permanent storage of
a
zero
correction for
each range.
Zero
may be turned
off at any time.
MAXIMUM INPUT VOLTAGE
+1200V dc or 1000V rms
ac
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 1000V
/
/vsec.
ANALOG
SETTLING TIME
FILTER MODE
FILTER
COMMAND
TO
0.01%
OF
STEP CHANGE
TO 0.001% OF
STEP CHANGE
Bypassed
FI
2 ms 20 ms
Fast
F0 or F3
40 ms
50 ms
Slow F
or F2
400 ms
500
ms
DIGITIZING
TIME
Line
Synchronous For
2°
to 2
17
samples per reading digitizing time is from 4 ms to 9
minutes 6 seconds using a 60 Hz ac line with
times increasing
20%
using
a 50
Hz
ac
line. Selectable in
18
binary steps.
Line
Asynchronous
2 ms.
{In
3 byte binary mode with dc
zero, offset, limits and calibration
factors turned off.)
NOISE REJECTION
Normal
Mode
Rejection
LINE
FREQUENCY
FILTER
MODE
4
SAMPLES/
READING
32
SAMPLES/
READING
128
SAMPLES/
READING
50
hertz Fast 60
dB 70 dB
75 dB
50
hertz
Slow 85 dB 90 dB
95 dB
60
hertz
Fast 60 dB
70 dB 75
dB
60
hertz
Slow 90
dB
95
dB
100 dB
Common Mode Rejection 160 dB at 60 hertz
with
1 kO in
series with either lead, and 4 samples
or
more per reading. Greater than or equal to 100 dB
with less than 4
samples per reading.
1-4