Fluke 341A - Introduction; Electrical Specifications; 343 A DC

1-1.
INTRODUCTION
1-2. The
Fluke
Model 341 A and
Model
343A DC
Voltage
Calibrators
provide dc
voltages of
0 to
1100 volts
in
three ranges.
Voltages
are
selected by
eleven-position
decade
switches,
which
provide in-line,
digital
readout of
the
instrument
output voltage. The
Model 341 A
employs
six-dial readout,
with
1
ppm
resolution,
and
the Model
343A
employs
seven-dial readout,
with
0.1
ppm
resolution.
Model
343A:
Range
(volts
10
100
1000
RESOLUTION
Model
341 A:
Model 343A:
Output (volts)
0 to i 1.1 111
10 (1
uv steps)
0 to 111.11110 (10
uv
steps)
Oto
1111.1110(100
uv steps)
1
ppm of range
(10
uv maximum)
0.1
ppm of
range
(1
uv
maximum)
1-3.
A
controlled current
limiter, a
fixed current
limit-
er, and
an
electronic crowbar
circuit provide
protection
against
instrument
malfunction and
operator error.
Output
current or
voltage,
depending on
function desired,
are con-
tinuously monitored by
a front
panel meter.
1-4. The
instruments are
designed for
rack-mount
installation, using
the mounting
brackets
supplied, and
are
equipped with
resilient feet and
tilt-down bail
for field or
bench use.
1-5.
ELECTRICAL
SPECIFICATIONS
ACCURACY OF
OUTPUT
NOTE:
The following
accuracy specifications apply after
(1
hour)
warmup at standard
reference conditions
of
23°C
±5°C
for
the Model 341A and
23
<)
C
±1°C
for
the
Model 343
A,
up to 70%
relative humidity, constant, line
voltage,
and constant
load.
Model 341 A:
Range
Accuracy
(whichever
is
greater)
10V
±0.01%
of setting or
±0.0003% of range
100
V
±0.01%
of setting or ±0.0002%
of range
1000
V
±0.01%
of setting
or ±0.0002%
of range
OUTPUT
VOLTAGE
Model 341 A:
0
to 1111.110
volts dc
Model 343A:
0
to 1111.1110
volts
dc
VOLTAGE RANGES
Range (volts)
10
100
1000
Output
(volts)
0 to
11.11110
(10
uv steps)
0
to 111.1110 (100
uv
steps)
0
to
1111.1
10
(1
mv
steps)
Range
Accuracy (whichever is
greater)
10V
±0.003%
of setting or
±0.0003% of
range
100
V
±0.003%
of setting or
±0.0001% of
range
1000
V
±0.003%
of setting or
±0.0001% of
range
TEMPERATURE
COEFFICIENT OF
OUTPUT
Model 341 A:
Less than
(5
ppm of
setting +0.1 ppm of
range
+2 uv) per
°C
from
+15°
to
+35°C.
Less than
(8
ppm of
setting +0.1 ppm of
range
+2
u.y)
per
°C from
0°
to +50°C.