SECTION 1
1.1
GENERAL.
1.1.1 The Dana Model 4600
is
a compact, highly
ac-
curate, four digit instrument featuring autorange, auto
polarity, 80
dB
normal mode noise rejection, 140
dB
com-
mon mode noise rejection, and 10,000 megohm input
resistance on the
DC
functions .2 and 2 volt ranges.
Available options include Battery Pack, Data Output, and
Read, Hold Probe.
1.1.2 The basic instrument has full multimeter capability
measuring full scale inputs from 10
IN
to 1000 volts on
five
DC
voltage ranges, from 10
J.J,V
to 1000 volts on
five
AC
voltage ranges, from 10 mOhms to 20 Megohms on
six
ohms ranges, 10 namps to 2 amps on
five
AC
current
ranges, and 10 namps to 2 amps on
five
DC
current ranges.
1.1.3 High reliability
is
insured by the
use
of
LSI
MaS
and solid-state circuitry, including the display. Protection
from possible introduction
of
fault voltage
is
provided
through both mechanical and electrical means. The use
of
separate input terminals, while routing inputs only when
the proper function
is
selected, reduces the chance
of
sig-
nals reaching the wrong circuitry. The current functions are
protected on
all
ranges by a 2.5 amp fuse; the
DC
volts
function
is
designed to handle inputs
of
1000 volts
DC
or
rms
AC
on
all
ranges; the
AC
volts function
is
designed to
handle inputs
of
1000 volts
DC
or 1000 volts rms
AC
to
20 kHz, decreasing to 200 volts at 100 kHz
on
all
ranges.
1.1.4 Also available
is
the Option
51
Isolated Output
(designated 4600-51). The option provides the function,
range, polarity, and numeric readout data in
BCD
form
both serially and in parallel.
1.1.5 Accessories available for 4600 include:
Option
61
Option 70
Option 80
Option
81
Option 82
Option
83
Carrying case.
Battery pack for operation -up to
four hours continuous
use
in areas
where no
AC
power
is
available.
Shielded input cable, for use in high
noise environments.
Hold Probe, provides pushbutton control
of
Measure/Hold functions.
5
KV
HV
Probe, extends
DC
voltage
measurement to 5
KV.
50
KV
HV
Probe, extends
DC
voltage
measurements to 50
KV.
GENERAL DESCRIPTION
Option 84 RF Probe, measures RF voltages to
200
MHz.
Option 88 Deluxe test leads, include assorted tips.
Option 89 Standard test leads, with replaceable tips.
1.2 MECHANICAL DESCRIPTION.
1.2.1 The basic
DMM
is
designed
as
a bench top instru-
ment and comes equipped with a bail handle to simplify
carrying. The bail handle rotates 3600 and may be used
as
a "kickstand" for easy measuring and control access.
1.2.2
All
components
of
the basic instrument including
the power supply are mounted on two printed circuit
boards and housed
in
a high-impact plastic case. Access to
the interior
of
the instrument for calibration and mainte-
nance
is
made by removing three screws on the back panel.
1.3 ELECTRICAL DESCRIPTION.
1.3.1 The model 4600 utilizes the dual-slope integration
method
of
analog-to-digital conversion. This technique
minimizes the number
of
components for increased reli-
ability and lower cost while having
inher~nt
advantages
of
stability and noise rejection.
1.3.2 The circuitry consists
of
a signal conditioning
section, digital section, and an analog-to-digital converter.
1.3.3 The analog-to-digital (A/D) converter changes a dc
signal fed into it into a representative digital signal. The
method used to perform this task
is
called dual-slope
integration.
1.3.4 The digital section measures the
output
of
the
AID
converter to produce a numeric value on the instrument
display that represents the value
of
the input signal. The
digital section also provides range control and decimal
placement.
1.3.5 The signal conditioning section scales, filters, and,
when required, converts the input signal to a full scale
±2
volts for the A/D converter.
1.4 SPECIFICATIONS.
1.4.1 Specifications are provided in table 1.1.
1-1
