Omega CN76000, Manual

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11
allows setting the maximum output limit. This is useful with processes that are over
pow ered.
SECURE MENU (cont'd) SECURE MENU (cont'd) SECURE MENU (cont'd) SECURE MENU (cont'd) SECURE MENU (cont'd)
S#LP S#LP
S#LP S#LP
S#LP Set Point Lamp: Select O on O on
O on O on
O on or OoFF OoFF
OoFF OoFF
OoFF. .
. .
.
O on O on O on O on O on Lamp ON when Output is ON.
OoFF OoFF OoFF OoFF OoFF Lamp OFF when Output is ON.
S2t S2t S2t S2t S2t Set Point 2 type: Select Abs or dE.
A b S
A b S A b S A b S A b S Absolute SP2. SP2 is independent of SP1, and may be set anywhere
between the limits of SPL and SPH.
dE dE dE dE dE Deviation SP2. SP2 is set as a deviation from SP1, and allows SP2 to retain
its relationship with SP1 when SP1 is changed (tracking SP2).
ALARM ALARM ALARM ALARM ALARM TYPE AND A TYPE AND A TYPE AND A TYPE AND A TYPE AND ACTION (if present) CTION (if present) CTION (if present) CTION (if present) CTION (if present)
C A C A
C A C A
C AUTION: UTION:
UTION: UTION:
UTION: In an In an
In an In an
In any critical application where failure could cause e y critical application where failure could cause e
y critical application where failure could cause e y critical application where failure could cause e
y critical application where failure could cause expensive xpensive
xpensive xpensive
xpensive
pr pr pr pr product loss or endang oduct loss or endang oduct loss or endang oduct loss or endang oduct loss or endanger per er per er per er per er personal saf sonal saf sonal saf sonal saf sonal safety ety ety ety ety, , , , , a redundant limit contr a redundant limit contr a redundant limit contr a redundant limit contr a redundant limit controller is recom- oller is recom- oller is recom- oller is recom- oller is recom-
mended. mended. mended. mended. mended.
When setting an alarm value for an absolute alarm (ALt = AbS), simply set the alarm to the
value at which the alarm is to occur.
When setting the alarm value for a deviation alarm ( ALt = dE), set the alarm to the value
equal to the difference in value between the desired alarm and Set Point 1. For example if
a low alarm is required to be 5 degrees below SP1, then set ALLo to -5. If a high alarm is
required 20 degrees above SP1, then set ALHi to +20. If SP1 is changed, the alarm will
continue to hold the same relationship as originally set.
The following diagram shows the action and reset functions for both absolute and deviation
alarm s.
When “Alarm Pow er Interrupt” ALPi is programmed ON and “Alarm Reset” is programmed
for Hold, the alarm will automatically reset upon a pow er failure and subsequent restoration
if no alarm condition is present.
I f “Alarm Inhibit” ALiH is selected ON, an alarm condition is suspended upon pow er up until
the process value passes through the alarm set point once. Alarm inhibit can
be restored as if a pow er up took place by pressing together the INDEX INDEX
INDEX INDEX
INDEX and
E N T E R E N T E R E N T E R E N T E R E N T E R keys for 5 seconds.
W A R N I N G W A R N I N G
W A R N I N G W A R N I N G
W A R N I N G: Resetting a high alarm inhibit will not allo Resetting a high alarm inhibit will not allo
Resetting a high alarm inhibit will not allo Resetting a high alarm inhibit will not allo
Resetting a high alarm inhibit will not allow an alarm to occur w an alarm to occur
w an alarm to occur w an alarm to occur
w an alarm to occur
OFF ON
OFF ON
ON OFF
ON OFF
D
ALLo
ALHi
D
D
D
ALLo ALHi
SP1
SP1
SP1
High Alarm
Low Alarm
High and Low Alarm
DEVIATION ALARMS
OFF ON
OFF ON
ON OFF
ON OFF
D
ALLo
ALHi
D
D
D
ALLo ALHi
ABSOLUTE ALARMS