HP 3457A - Page 14

3457A
General
Information
Table 1-1. Specifications
DC CURRENT (Cont’d)
MAXIMUM READING RATES: (Readings/Second)
INTEGRATION | DIGITS READING RATE
TIME DISPLAYED | 60 HZ [50 Hz
0.0005 PLC 3 1/2 1350 | 1350
0.005 PLC 41/2 1250 | 1250
0.1 PLC 5 1/2 360 312
1 PLC 6 1/2 53 45
10 PLC 6 1/2 4.8 4.0
6
100 PLC we -48 +40
Reading
Rates
apply
with
the
keyboard
lock
ON,
Auto-Zero
OFF,
Display
OFF,
Math
Func-
tion
OFF,
Delay
Time
set
to
0.0,
Manual
ranging,
readings
stored
in
internal
memory
using
Timer Trigger
and
single precision
integer format.
RESISTANCE
(2-Wire Ohms, 4-Wire Ohms, Offset Compensated Ohms)
INPUT CHARACTERISTICS:
MAXIMUM RESOLUTION CURRENT
RANGE
READING
THROUGH
(OHMS)
16
1/2
digits
digits|5
1/2
digi
4
1/2
digits|3
1/2
digits
UNKNOWN
30
30.30000
Ohm
uOhm
100
uOhm
1
mohm
10
mohm
1
mA
300
303.0000
Ohm
udhm
1
mOhm
10
mOhm
100
mOhm
1
3
3.030000KOhm
mohm
10
mOohm
mOhm
1
Ohm
1
mA
30
30.30000kKOhm
mOhm
100
mOhm
1
Ohm
10
Ohm
100
uA
303.
0000KOhm
mohm
1
Ohm
10
Ohm Ohm
10
uA
3.030000MOhm
Ohm
10
Ohm
100
Ohm
KOhm
1
uA
30.30000M0hm
Ohm
100
Ohm
1
KOhm
kKOhm
100
nA
303.
0000MOhm
Ohm
1
KOhm
10
KOhm
KOhm
100
na
3.030000GOhm
kOhm
10
KOhm
100
KOhm MOhm
100
na
On
the
Extended
Ohms
ranges
(300
MOhm
&
3
GOhm),
the
current
source
is
100
nA
in
parallel
with
10
MOhms.
INPUT PROTECTION: (non-destructive)
HI sense to LO sense: +350V peak.
HI or LO to Earth ground: +450V peak.
MAXIMUM OPEN CIRCUIT VOLTAGE:
30 Ohm to 3 Megohm ranges: 12 volts
30 Megohm to 3 Gigaohm ranges: 8.5 volts