General Information
3457A
Table 1-1. Specifications
DC VOLTS
(Cont'd)
1 YEAR:
Teal + 5°C After 1 hour warm-up
RANGE | % READING
NUMBER OF COUNTS
100 PLC*
10 PLC*
1 PLC*®
-1 PLC*
-005 PLC*
-0005 PLC*
6 1/2
digits|]6
1/2
digits|6
1/2
digits|5
1/2
digits|4
1/2
digits|3
1/2
digits
30
mv
0045
365
500
70
300
mv
0035
39
50
3
0025
6
*
30 Vv
+0040
19
30
300
v
0055
6
7
*
PLC
=
Integration
Time
in
Power
Line
Cycles.
When
using
integration
times
of
100
PLC,
10
PLC,
or 1PLC; multiply Number of Counts in the Measurement Accuracy Tables by 0.1 for 5 1/2 digit
readings, 0.01 for 4 1/2 digit readings and 0.001 for 3 1/2 digit readings.
Teal = the temperature of the environment where the 3457A was calibrated.
Calibration should
be performed with the environment
temperature between 18 and 28 degrees centigrade.
TEMPERATURE COEFFICIENT:
*(% of Reading + Number of Counts)/°C
6 1/2 Digits Displayed
RANGE | Auto-Zero ON
Auto-Zero OFF*
30
mv
+0005
-0005
+
40
300
mv
~0005
0005
+
13
3
0005
.
-0005
+
10.3
30 Vv
~0005
.
+0005
+
11.0
300
Vv
0005
'
-0005
+
10.3
* Specifications
given are
for a stable
environment
(+ 1°C) and over a ten minute
period.
Multiply Number of Counts by 0.1 for 5 1/2 digit readings, 0.01 for 4 1/2 digit
readings and 0.001 for 3 1/2 digit readings.
NOISE REJECTION:
With
1 Kohm
imbalance
in
the
LO
lead
and
line
frequency
(50
or
60
Hz)
INTEGRATION
TIME
100 PLC | 10 PLC
| 1 PLC
| -1 PLC
| -005 tc | .0005 PLC
AC
NMR
90
db
80
db
60
db
0 db
0 db
0 db
AC
ECMR
160
db
156
db
136
db
76 db
76
db
76
db
DC
CMR
140
db
140
db
140
db
140
db
140
db
140
db