8
2.2.1
CHANNEL SETUP ENTRY MENU
The
entry menu
shown on the left side of Figure 2.1 allows access to all configuration
variables for the selected channel. These are,
Alarm 1
,
Alarm 2
,
Alarm 3
,
Data
From?
Linearize
,
Configure
and
Calibrate
.
2.2.2
ALARM 1 / ALARM 2 / HORN RELAY SET-UP MENU
Alarms 1 and 2 are identical except A1 may not be
acknowledged
and front panel LED
indicators are yellow while A2’s are red. Since their configuration menus are the same
only one is shown in Figure 2.2 for clarity.
Figure 2.2
The first entry determines the
Setpoint
value where the alarm trips. It is entered in
engineering units. For example, if a channel monitors 0-50 ppmH2S and the alarm must
trip at 10 ppm, the correct entry is 10.00.
Latching
determines either manual or automatic alarm reset operation.
YES
requires a manual
Alarm Reset
to unlatch the alarm even though an alarm condition
no longer exists.
YES
also causes this alarm group’s common relay, front panel
LED, and optional discrete relay to latch.
NO
allows all outputs for this alarm to
automatically reset as soon as the alarm condition clears.
TRIP ON.
is set to
HIGH
for increasing alarms or
LOW
for decreasing alarms to
determine if the alarm activates upon exceeding or falling below the setpoint.
The
ON DELAY / OFF DELAY
entries allow
ON
and
OFF
time delays affecting
how long the setpoint must be surpassed before an alarm event transition occurs.
ON
delays are limited to 10 seconds while
OFF
delays may be as long as 120 minutes.
Delays are useful in many applications to prevent nuisance alarms and unwanted
cycling into and out of alarm conditions.
The
HORN ON
entry allows linking this alarm to the common horn relay.
NO
causes the alarm to have no effect upon the horn relay. Entering
YES
causes this
alarm to turn the horn relay on steady, or, to pulse it depending upon horn
configuration in they system menu (see section 2.3.1).
Discrete LED indicators on the front panel indicate the status of each alarm and relay.
Any
new
alarm event causes the associated LED to flash until
Alarm Reset
occurs
causing an
acknowledged
steady on condition. Operators should recognize
new
alarms
by a flashing LED.
Alarm Reset
also
acknowledges
, or deactivates, the horn relay until
another new alarm occurs.
All relays are rated at 5 Amp for 28 VDC and 250 ~VAC
RESISTIVE
loads.
IMPORTANT: Appropriate diode (DC loads) or MOV (AC loads) snubber devices
!
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