Specifications

RANGE-Pushbutton switches select
from
0.2
volts
to
1.2 kilovolts dc
in
five
ranges
or
from
200 ohms to
20
megohms
in
six
ranges.
FUNCTION-Five
pushbutton
switches
IVOLTS,
OHMS, TEMP
(oC),
1/TlME,
and TIMEI are
used
to
select.
respective
functions
for measurement.
ms
(or
1/ms) and
ps
(or
l/tts)
lndicators-Two
LEDs
automatically
indicate correct units of
measurements.
With the TIME
function
selected,
the
units of time
difference
(milliseconds
or
microseconds) between
the two
intensified
zones
on
the crt display
is
in'
dicated
by illumination
of either the
ms
or
lts
LED.
Seconds are indicated
when both LEDs are
in a
non-il
luminated
state.
With the
1/TIME
function
selected, the
number of
measured intervals
per
unit of time
(milliseconds
or
microseconds) is
indicated by illumination of
the
respective 1/ms
or
14rs LED.
lf the duration
of one
event is being
measured, the LEDs
indicate
frequency.
An
illuminated
1/ms
LED
indicates fre-
quency
in kilohertz
and an
illuminated
14rs LED
indicates
megahertz.
Frequency
in
hertz
is indi-
cated when
both LEDs
are
in a non-illuminated
state.
A
TIME Control-Used
in conjunction
with the
DELAY TIME
POSITION
control
in
the TIME and
1/TIME
functions.
The
A TIME control
moves
only
the time-measurement
point
while
the
DELAY TIME
POSITION
control moves
both
the reference
point
and the time-measurement
point.
With
the time-
measurement
point
to the
left
of the
reference
point,
the
ReadoUt indicates
a
negative
time difference.
NOTE
The DM44
may
be
modified
to
make
the
DELAY
TIME POSITION
control move
only
the
reference
point.
The
procedure
for making
this modification
is
located
in
the Maintenance
Section
of
the
DM44
lnstruction Manual.
Modification
is
to be done by
qualified
service
personnel
only.
@
4658/DM44 Operators