
GASMAX CX Operation & Maintenance Manual, Revision 1.0
Page 10
4
INSTALLATION
SELECTING
A
LOCATION
Factors
such
as
prevailing
winds,
target
gas
density,
potential
leak
sources,
air
movement
machinery
and
similar
environmental
variables
are
important
when
selecting
a
location
for
the
GASMAX
CX
gas
monitor
or
gas
sensor.
Even
though
the
GASMAX
CX
is
designed
for
rugged
service,
sensors
and
electronics
should
be
protected
from
environmental
damage
due
to
water,
snow,
shock,
vibration
and
dirt.
In
addition,
the
sensor
and
/
or
display
should
be
located
such
that
regular
maintenance
and
periodic
sensor
replacement
can
be
readily
accomplished.
While
there
are
no
industry
standards
for
gas
detector
placement,
professional
tools
exist
that
can
simulate
leaks
or
spills
and
provide
excellent
guidance
for
locating
gas
detectors
throughout
a
facility.
EXPLOSION
PROOF
INSTALLATION
GASMAX
CX
monitors
with
standard
explosion
‐
proof
sensor
heads
are
certified
for
use
in
Class
1
Division
1
hazardous
areas.
Installation
in
these
areas
should
follow
best
industry
standard
practices
and
all
appropriate
electrical
codes.
Generally,
these
codes
require
rigid
metal
conduit,
poured
seals
and
other
installation
elements
necessary
to
ensure
safety.
In
all
cases,
GDS
Corp
recommends
any
GASMAX
sensor
be
mounted
vertically
with
the
sensor
opening
facing
down.
If
there
is
a
possibility
that
water
or
other
liquid
may
be
present,
GDS
Corp
further
recommends
the
installation
of
a
sensor
head
Splash
Guard
(p/n
10
‐
0205)
to
protect
the
sensor
from
damage.
For
maximum
protection
against
RF
interference
or
electrical
surge,
the
GASMAX
CX
enclosure,
all
remote
sensors
and
interconnecting
conduit
must
be
properly
grounded.
INTRINSICALLY
SAFE
INSTALLATION
The
GASMAX
CX
is
not
certified
for
use
as
an
Intrinsically
Safe
device.
MOUNTING
THE
GASMAX
CX
INSTRUMENT
ENCLOSURE
The
GASMAX
CX
standard
enclosure
is
a
cast
aluminum
explosion
‐
proof
(NEMA
7)
enclosure
as
shown
in
Figure
4
‐
1.
Two
channel
GASMAX
CX
units
with
dual
local
sensor
heads
include
a
“Y”
adapter,
shown
in
Figure
4
‐
2.
The
GASMAX
CX
or
remote
sensor
should
always
be
mounted
with
the
sensor
head
opening
facing
down.
If
necessary,
a
Splash
Guard
(p/n
10
‐
0205)
should
be
attached
if
there
is
any
chance
that
water
or
liquid
spray
could
enter
the
sensor
opening
from
below.
Be
sure
to
leave
sufficient
room
(~
12”)
below
the
sensor
head
to
allow
for
ambient
air
circulation
and
easy
access
for
attachment
of
a
Calibration
Cup
and
/
or
removal
of
the
sensor
head
cover
for
sensor
replacement.