GASMAX CX + GDS-IR Operation & Maintenance Manual, Revision 1.0
Page 15
ALARM
SETUP
–
ALARM
1,
2
AND
3
Each
channel
can
be
programmed
for
up
to
three
independent
alarm
levels,
and
can
be
set
to
alarm
ABOVE
the
target
value
for
BELOW
the
target
value.
All
programming
is
done
in
engineering
units
that
correspond
to
the
channels
ZERO
and
SPAN
settings.
Alarm
processing
will
trigger
an
alarm
condition
when
the
input
exceeds
the
programmed
value,
and
includes
hysteresis
to
keep
the
alarm
from
rapidly
switching
ON
and
OFF
if
the
input
remains
close
to
the
programmed
alarm
value.
NOTE:
ALARM
RELAYS
ARE
NORMALLY
TRIGGERED
IF
EITHER
CHANNEL
1
OR
CHANNEL
2
ALARM
THRESHOLDS
ARE
EXCEEDED.
NOTE:
IF
THE
OPTIONAL
ALARM
RELAYS
ARE
NOT
INSTALLED,
ALARM
SETTINGS
AFFECT
THE
OPERATION
OF
THE
FRONT
PANEL
DISPLAY
ONLY.
SEPARATE
ALARM
SETTINGS
MAY
NEED
TO
BE
PROGRAMMED
IN
THE
4
‐
20MA
RECEIVING
DEVICE.
ALARM
OPERATION
–
FAULT
FAULT
is
typically
used
to
indicate
FAULT
conditions
that
suggest
sensor
failure
or
“out
of
measurement
range”
conditions.
SYSTEM
SETUP
Once
operational,
the
user
should
verify
the
following
settings
prior
to
initial
calibration:
1.
Local
time
and
date:
Check
date
value
and
adjust
time
for
proper
time
zone.
2.
Tag
name
or
Engineering
Units
settings:
Edit
values
as
necessary.
3.
CAL
SPAN
GAS
value:
Set
to
match
concentration
of
calibration
gas
cylinder.
4.
CAL
MARKER
value:
Adjust
desired
output
mA
during
calibration.
5.
ALARM
1,
ALARM
2,
ALARM
3
settings:
Set
for
desired
levels.
NOTE:
If
relays
are
not
installed,
GASMAX
CX
programmable
alarm
levels
affect
operation
of
display
color
only
(Sec
7
‐
3).
