general
description
Expressly designed for
TV
servicing,
the Model 232 (249)
Peak-to-
Peak
VTVM
features a
full-wave,
high frequency
rectifier
circuit
that
re-
sponds to and measures the
peak-to-peak
voltage
value
of complex and sine
waveforms even when
DC
is present.
It
also reads the
rms
voltage
of
sine
waves (on a
separate
scale),
dc
voltage
values,
and resistance
values.
For
consistantly high
accuracy,
there
are
seven non-skip ranges on all functions
to provide a uniform 3 to 1
scale
ratio between
adjacent
ranges.
The
input resistance on all dc
voltage
ranges
is
11
megohms, which
is
high enough to prevent loading error and
yet
not so high as to Impair
the
stabilityof
the
instrument. The dc
voltage
ranges may
be
extended
t030,000
volts (with accessory High
Voltage
Probe HVP-1 or HVP-2) and may also be
used for RFvoltage measurement up to
250
mc
(with accessory
RF
Probe Model
PRF-11). The frequency response
of
the
ac
voltage
ranges extends
from
30
cps
to 3 mc. for a source
of
1 00 ohms or less.
Facilities
that
increase
the
accuracy,
versatility,
and ease of
oper-
ation
include
zero-
center
indication
for discriminator
alignment
and bias
measurements;
zero
adjustment unaffected by changing function
or
range;
separate
scale
for low
ac
voltage
measurement;
electronic
protection
against
meter burn out; adjustment of
all
calibration
controls without
cabinet
removal;
and UN
I-PROBE, a
single
unit
probe used for
all
functions.
The Model 232
(4
1/2"
meter) and the Model
249
{7
1/2"
meter)are
identical
electrically.
Where
portability
is
desired,
the
Model 232
is
pref-
erable
because
of
Its extremely compact design. The Model 249
is
an ideal
bench instrument, having
extra
long
scales
to minimize reading errors and
per-
mitting permanent
placement
of
the equipment
at
a
practical
working
distance
.
Both Instruments
are
ruggedly housed, professional in
appearance,
and
highly
dependable
and trustworthy measuring
devices
that
will prove extremely
val-
uable
in
television,
fm-am radio
servicing,
and many industrial
applications.
~
.
specifications
DC
VOLTMETER:
Ranges
.................•....
0 to
1.5,5,
15,150,500,1500
volts
Input Resistance
...............
11
MQ
Accuracy
.........••.........•
±
3%
of
fu
II
sca I e or
better.
Range
extended
to
30,000
volts with High
Voltage
Probe HVP-1
or
HVP-2
(1090 MQ multiplier resistor recommended).
To Next Page
Loading...
Need help?
General
