2
SDL720-en-GB_V1.0 12/16
Introduction
Congratulations
on
your
purchase
of
the
Extech
SDL720
Pressure
Manometer.
This
device
measures
gauge
and
differential
pressure
in
the
range
of
±29
psi.
Supported
measurement
units
are
bar,
psi,
Kg/cm
2
,
mm
Hg,
inch
Hg,
meters
of
H
2
O,
inches
of
H
2
O,
atmosphere,
hPA,
and
kPA.
Logged
data
readings
are
stored
on
an
SD
card
for
transfer
to
a
PC.
This
meter
is
shipped
fully
tested
and
calibrated
and,
with
proper
use,
will
provide
years
of
reliable
service.
Please
visit
our
website
(www.extech.com)
to
check
for
the
latest
version
of
this
User
Manual,
other
Translations
of
this
manual,
and
Customer
Support.
Safety
International
Safety
Symbols
This
symbol,
adjacent
to
another
symbol
or
terminal,
indicates
the
user
must
refer
to
the
manual
for
further
information.
Meter
Description
1.
P1
Input
(positive
+)
2.
P2
Input
(negative
‐
)
3.
LCD
Display
4.
HOLD
and
Backlight
key
5.
MAX
‐
MIN
key
6.
SET
and
Clock
key
7.
RS232
output
jack
8.
Reset
button
9.
Power
Adaptor
jack
10.
SD
card
slot
11.
ENTER
and
LOG
key
12.
Down
arrow
▼
key
(Press
▼
&
▲
key
at
same
time
to
zero
meter)
13.
Up
arrow
▲
/
UNIT
key
(Press
▼
&
▲
key
at
same
time
to
zero
meter)
14.
Power
ON
‐
OFF
key
Notes:
Items
7,
8,
and
9
are
located
behind
the
snap
‐
off
compartment
cover
on
meter’s
right
side.
Battery
compartment,
tilt
stand,
and
tripod
mount
are
located
on
the
rear
of
the
instrument.
1
11
12
13
14
2
3
4
5
6
7
8
9
10
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