J
J
l
J
J
l
DM44
28.
Input
Connectors-
Two
banana jacks provide +
(red) and
COM
(black) inputs
for
voltage and resistance
only.
29.
Probe
Connector-Input
connector
for
the
temperature
probe.
30.
Readout-Negative
polarity
indication
is
auto-
matic
for
negative de voltage and temperature with
no
polarity
indication
for
positive measurement. A
blinking
display
indicates overrange. The decimal
point
is
position-
ed
by
the
FUNCTION
and RANGE
controls
for
multimeter
operation
and
by
the oscilloscope A
TIME/DIV
switch in
the
TIME
or
1/TIME
modes.
31.
RANGE-Selects
from
.2
V
to
1.2 kV de in 5 ranges
(1200 volts is the maximum safe
input
in the 1.2 kV de
mode);
from
200 ohms
to
20 megohms in 6 ranges.
32.
FUNCTION-Selects
VOL TS, OHMS, TEMP (° C),
1/TIME,
or
TIME
functions
of
the DM44.
33. Scale Factor
Lamps-
Two
lamps.
In
the
TIME
function,
the
Readout and Scale Factor
Lamps
indicate
the time difference between the
two
intensified
zones on the
crt
display. One lamp
or
the
other
will
light
to
indicate ms
or
µs.
No
lamp lit indicates
seconds.
In the 1 /TIME function the Readout and Scale Factor
Lamps indicate the number
of
measured intervals per unit
of
time. One lamp
or
the other will
light
to
indicate intervals
per
ms
(1/ms lamp)
or
intervals
per
µs
(1/µs lamp). No
lamp lit indicates intervals per second. If the duration
of
one event
is
being measured, the Readout and Scale
Factor Lamps indicate frequency. The
1/ms
lamp in-
dicates kHz, the 1/µs lamp indicates MHz, and
no
lamp lit
indicates Hz.
34. ll.
TIME-Used
in
conjunction
with the DELAY
TIME
POSITION control in the
TIME
and
1/TIME
func-
tions. The ll. TIME
control
moves
only
the time-
measurement point. 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
You
can
modify
your
instrument
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
Service manual.
@
466/464 DM44 Operators
9
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