HP 3457A Service Manual page 12

3457A General Informa tion
Table 1-1. Specifications
DC VOLTS ( C o n t y d )
MAXIMUM READING RATES: ( R e a d i n g s / S e c o n d )
INTEGRATION
I
DIGITS
I
READING RATE
DISPLAYED
0.005 PLC
0.1 PLC
1 PLC 6 1 / 2
10 PLC 6 1 / 2
100 PLC
R e a d i n g R a t e s a p p l y w i t h t h e k e y b o a r d Lock ON, A u t o - Z e
8
OFF, D i s p l a y OFF, Math F u n c -
t i o n OFF, D e l a y Time s e t t o 0.0, Manual r a n g i n g , r e a d i n g s s t o r e d i n i n t e r n a l memory
u s i n g T i m e r T r i g g e r and s i n g l e p r e c i s i o n i n t e g e r f o r m a t .
DC CURRENT
INPUT CHARACTERISTICS:
MAX I M U M
READ I N G
6 1 / 2 d i g i t s
RESOLUTION SHUNT
RESISTANCE
1000 Ohm
100 Ohm
10 Ohm
1 Ohm
.I ohm
4 1 / 2 d i g i t s 3 1 / 2 d i g i t s
I
6 1 / 2 d i g i t s 15 1 / 2 d i g i t s RANGE
300 uA
3 m A
3 0 m A
300 m A
1 A
MAXIMUM BURDEN VOLTAGE: 0.35V
-
300uA, 3mA and 30mA r a n g e s . 0.6V
-
300mA r a n g e . 1 V
-
1A r a n g e .
MEASUREMENT ACCURACY: * ( % o f r e a d i n g + Number o f C o u n t s )
A f t e r 1 h o u r warmup, w i t h A u t o - z e r o ON.
24 HOUR: T c a l
5
1
O C
A f t e r t w o 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 .
RANGE
3 0 0 uA
3 m A
3 0 m A
300 m A
1 A
% READING
0.0020
0.002
0.0020
NUMBER
1 PLC*
6 1 / 2 d i g i t s
F COUNTS
.I PLC*
5 1 / 2 d i g i t s
.005 PLC*
4 1 / 2 d i g i t s
100 PLC*
6 1 / 2 d i g i t s
.0005 PLC*
3 1 / 2 d i g i t s
10 PLC*
6 1 / 2 d i g i t s