b
'5
Section
I
Model
4
12A
Table
1-1.
Specifications
VOLTMETER
Voltage Range: Positive and negative voltages from
1
millivolt
fuull
scale to
1000
volts full scale in
13
9
ranges
Accuracy
:
+
1
%
of full scale on any range
Input Resistance:
10
megohms
1%
on
1
mV,
3
mV,
b
and
10
mV ranges
30
megohms
21%
on
30
mV range
100
megohmsf.l%
on
100
mV range
200
megohms
t
1
%
on
300
mV range and above
AC Rejection: A voltage at power line
or
twice power
line frequency
40
dB
greater
than full scale affects
reading
less
than
1%.
Peak voltage must not exceed
1500
volts.
AMMETER
Current Range: Positive and negative currents from
1
microampere full scale to 1 ampere full scale in
thirteen ranges
Accuracy
:
2
2% of full scale on any range
v
tnput Resistance
:
tnternal Shunt Full
Scale
Range Resistance* Voltage
Drop
.001
mA
.003
mA
.01
mA
.03
mA
.I
mA
.3
mA
1
mA
3
mA
10
mA
30
mA
100
mA
300
mA
1000
mA
d
I000
ohms
3
I6
ohms
100
ohms
3
I
.6
ohms
IO
ohms
3.16
ohms
1
ohm
.3
16
ohm
.1
ohm
.I
olim
.I
olim
.I
ohin
.I
ohm
1
mV
0.9486
mV
1
mV
0.9486
mV
1 mV
0.9486
mV
1
mV
0.9486
mV
1
mV
3
mV
10
mV
30
mV
100
mV
*For
total insertion resistance add
0.07
ohms copper lead
rcsistance at
25
C
OHMMETER
Hesistaticc Ibiige: Rcsistancc from
I
olim
center-scale to
IO0
niegolims center-scale in nine
decade
raiiges
a
Accuracy:
f-
5%
of
reading froni
0.3
to
3
on Ohms
scale
'I
14
Voltages and Currents:
Open Circuit Short Circuit
Current
Range
Volts
XI
10
mV
10
mA
XI0
100
mV
10
mA
XI00
IV
10
mA
XlOOo
1v 1
mA
XlOK
1v
100~
A
XlOOK
1v
lop
A
XIM
XlOM
1v
.lp
A
Xl00M
1v
.Olp
A
1v
'P
A
AMPLIFIER
Voltage Cain:
1000
maximum
AC
Rejection:
3
dB at
1
Hz,
80
dB at
50
and
60
Hz
Output: Proportional
to
meter indication;
1
volt at
full scale; maximum current,
1
mA.
(Full
scale
corresponds to
1
.O
on upper scale.)
Output Impedance:
Less
than
2
ohms at dc
Noise:
Less
than
5
mV
RMS
on
any range
Drift: negligible
GENERAL
Isolation Resistance: At least
100
megohms shunted
by 0.1~
F
between common terminal and case
(power line) ground
Common Mode Rejection: May be operated up to
500
Vdc
or
130
Vac from ground
Power: 115/230 V
f10%,
5040
Hz,
35
W
Dimensions: Cabinet Mount:
11-1/2
in. high,
7-1/2
in. wide,
10
in. deep
Rack Mount:
001
29-5
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