HP 3457A Service Manual page 10

3457A General Information
Table
1-1.
Specifications
DC VOLTS
INPUT CHARACTERISTICS:
MAX I M U M
READ 1 N G
3.030000 V
RESOLUTION
6
1/2 d i g i t s 5
1 / 2 d i g i t s
4 1/2
d i g i t s 3 1/2 d i g i t s
INPUT RESISTANCE (OHMS):
30 m i l l i v o l t t h r o u g h 3 v o l t r a n g e
-
10 gigaohms
30
v o l t a n d
300
v o l t r a n g e
-
10
megohms ( + / -
1%)
MAXIMUM INPUT VOLTAGE: ( n o n - d e s t r u c t i v e )
H I o r L O t o E a r t h Ground:
*
450V peak
MEASUREMENT ACCURACY: f(% o f r e a d i n g
+
Number o f C o u n t s )
A u t o - Z e r o O N
24
HOUR: T c a l
*
1
O C
2
h o u r warm-up A c c u r a c y r e l a t i v e t o c a l i b r a t i o n s t a n d a r d
24 h o u r s p e c i f i c a t i o n s a p p l y i f t h e i n s t r u m e n t i s c a l i b r a t e d b e t w e e n 90 and 100% o f
f u l l - s c a l e . F o r c a l i b r a t i o n b e t w e e n 33 and 90% o f f u l l - s c a l e , a d d .00015% t o % R e a d i n g .
RANGE
30 m V
300 m V
3
v
30 V
300 V
t
READING
0.0012
0.0005
0.00035
O.OOO65
O.OO25
100
PLC*
6 1/2 d i g i t s
NUMBER OF COUNTS
10
PLC*
6 1/2 d i g i t s
1
PLC*
6 1/2 d i g i t s
.005 PLC*
4 1/2
d i g i t s
.I
PLC*
5 1/2
d i g i t s
.0005 PLC*
3 1/2
d i g i t s
90 DAY: T c a l
5
5 ' ~ A f t e r 1 h o u r warm-up
RANGE
I
% READING
I
NUMBER OF COUNTS
100 PLC*
6 1/2 d i g i t s
.005 PLC*
1/2
d i g i t s
10 PLC*
6 1/2 d i g i t s
.0005 PLC*
3 1/2 d i g i t s
1
PLC*
6 1/2 d i g i t s
.I
PLC*
5 1/2
d i g i t s