Table of Contents
Advertisement
MODEL 660A DIFFERENTIAL VOLTMETER
GENEPaL DESCRIPTION
INPUT RESISTANCE:
50 megohms, 0.5 to 500-volt
ranges;
10 megohms, O.l-volt
range;
1 megohm, 0.1 to lo-millivolt
ranges.
LINE FREQUENCY REJECTION:
Greater
than 45 db.
GENERAL:
LINE STABILITY:
Better
than
5 ppm for
10% change in Line voltage.
RECORDER OUTPUT:
output:
Adjustable
10 to 25 millivolts
dc for
full-scale
meter
deflection.
Output
Resistance:
300 ohms maximum.
Noise:
2 microvolts
peak-to-peak
referred
to input
up to 1 cps.
Note:
Recorder
used must have fully
isolated
input,
1010 ohms minimum to ground.
POLARITY:
Positive
or negative,
selectable
by switch.
CONNECTORS: Input:
Binding
posts.
Output:
Banana jacks
POWER: 105-125
or 210-250
volts
(switch
selected),
50-400
cps, 45
watts.
DIMENSIONS, WEIGHT:
5-l/2
inches
high
x 17-l/2
inches
wide x 13-l/2
inches
deep;
net
weight,
24 pounds.
l-5.
ACCESSORIES.
a.
Model
6601A High Voltage
Divider
is a LOO:L divider
which
extends
the range
of the
Model
660A to 5000 volts.
The divider
accuracy
is ?O.Ol% and its
input
resistance
is
10 megohms.
The overall
limit
of error
of the Model
660A with
the Model
660lA
is ?0.03%.
Section
7 gives
operating
instructions
and Section
8 contains
the Replaceable
Parts
List
and the Schematic
Diagram
for
the Divider.
b.
Model 4000 Rack Mounting
Kit,
containing
two brackets
and a top cover,
converts
the
Model 660A to fit
standard
19-inch
racks,
Rack mounted,
the Model 660A is 5-l/4
inches
high
x 19 inches
wide x 13-l/2
inches
deep.
Section
7 has assembly
instructions.
1-6.
EQUIPMENT SHIPPED.
The Model
660A Guarded
dc Differential
Voltmeter
is factory-
calibrated
and is shipped
with
all
components
in place.
All
units
are shipped
for
bench
use.
Model 4000 Kit
may be ordered
for
rack mounting;
refer
to Section
7 for
assembly
instructions.
The shipping
carton
also
contains
the Instruction
Manual.
1066R
3
Advertisement
Table of Contents
