introduction
and
Specifications
SPECIFICATIONS
Table
1-1.
Specifications
DC
VOLTAGE
Input Characteristtcs
RESOLUTION
FULL SCALE INPUT
RANGE
5%
DIGITS
5%
DIGITS
4%
DIGITS' RESISTANCE
200
mV
199.999
mV
1
PV
10 pV
21
0,000
Mn
2V 1.99999V
10
fl
100 pV 210,000
Mn
20V 19.9999V
100 pV
1 mV
21
0,000
Mn
200V 199.999V
1
mV
10 mV 10
MQ
1
OOOV
1000.00V 10 mV
100 mV 10
Mn
'4%
digits at the fastest reading rate.
Accuracy
NORMAL (S) READING RATE
...........
f
(%
of Reading
+
Number of C~unts).~
RANGE
24
HOUR
23f
1
*C1
90
DAY 23H°C
1
YEAR
23&!j0C
0.003
+
34
0.007
+
44 0.008
+
44
0.002
+
2
0.004
+
3 0.005
+
3
0.002
+
2
0.005
+
3 0.006
+
3
0.002
+
2
0.005
+
3
0.006
+
3
0.003
+
2
0.005
+
3
0.007
+
3
L
Relative to calibration standards.
Using Offset control.
When in fast reading rate with internal trigger and transmitting data oqt of the
IEEE-488
ithterface, the
8840A
display must be blanked (command
Dl)
to ensure stated accuracy.
When offset control is not used, the number of counts are
5.7,
and Qfor
24
hour,
90
day, and
1
year respeetiv
MEDIUM AND FAST RATES:
............
In medium rate, add2 counts to number of counts. In fast rate
3
counts
for the number of counts.
Operating Chamcterktlcs
TEMPERATURE COEFFICIENT
..........
<f(0.0006%
of Reading
+
0.3
Count) per OC from
O°C
to
1
and 28OC to SO0 C.
MAXIMUM INPUT
.......................
lOOOV
dc or peak ac on any range.
.....................
NOISE RWECTJON
Automatically optimized at power-up for
50,
60, or
400
HZ.
READINGS/ PEAK NM
RATE
SECOND1
FILTER NMRR2
SIGNAL CMRR3
S
2.5
Analog
&
>98
dB
20V
or
>I40
dB
Digital
2x
FS4
M
20
Digital
>45
dB
lx
FS
>I00
dB
F
100
None
-
Ix
FS
>60
dB
Reading rate with internal trigger and
60 Hz
power line frequency. See "Reading Rates" for more deta
Normal Mode Rejection Ratio, at
50
or 60
Hz
f
0.1%.
The NMRR for
400
Hz
f
0.1%
is
8b
dB in S rate and
3f
in
M
rate.
Common Mode Rejection Ratio at
50
or
60
HzM.l%,
with
1
kn
in series with either lea@.TheCMRR is
>14
at dc for all reading rates.
20
volts or
2
times
Full
Scale whichever is greater, not to exceed
1000V.
1-2
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