DYNISCO UPR800 Series Instruction Manual
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display shows the correct mode, either
HI
or
Lo
. Press the
FUNC
key to set the value.
Finally, press the
RESET
key to go back to the active display.
8.5 Setting the Alarms:
All Alarms supplied with the Instrument can be linked to either the Primary Input or the
Secondary Input (if available), and are capable of being set as High Level Alarms or Low
Level Alarms, and may operate in either
Failsafe
or
Direct
condition.
Failsafe
means that in the event of power failure to the Instrument, the Alarm will activate.
Use this feature on a shutdown alarm. Please note that in a proper operating condition in
Failsafe mode, the Normally Closed Contact are held OPEN, while the Normally Open
contacts are held CLOSED. On power failure, they are released.
On start-up, a Low Alarm may cause the unit to go into an undesired alarm condition prior
to reaching running conditions. This Alarm can be masked so that the Low Alarm will be
deactivated until it has gone above the alarm value for the first time. It will then operate
as a normal low alarm.
The default values for
Alarm 1
are: high alarm at 40% of full scale, linked to the primary
input, 0.4 second filtering, 1% hysteresis, automatic reset, and failsafe mode. Each alarm
may be set to 110% of full scale.
The default values for
Alarm 2
are: high alarm at 60% of full scale, linked to the primary
input, 0.4 second filtering, 1% hysteresis, automatic reset, and failsafe mode.
The default values for
Alarm 3
, if supplied, are: high alarm at 80% of full scale, disabled
(not linked to any input), 0.4 second filtering, 1% hysteresis, automatic reset, and failsafe
mode.
Set the Alarm parameters before setting the alarm value. If the alarm parameters have
already been set, set the alarm values as described in section 8.6.7.
8.5.1 Setting Channel Alarm to Monitor (Alarm Input Channel Link):
The Alarm 1 Input Channel Link defaults to the primary input. To check or change this
value press the
FUNC
key until
nonE
and
GROUP
show on the display. Press the
t
key
until
3
shows in the upper display. Press the
FUNC
key until
A1.LNK
shows in the lower
display. Select the choice desired by pressing the
u
or
t
keys. The choices are:
OFF
,
(disabled), linked to the primary input
Prl.In
, or linked to the secondary input
Sec.In
.
Note: if you do not have a secondary input,
Sec.In
will not appear as a choice. Press the
FUNC
key to lock in the value and advance to the next parameter. Similarly, you may
configure Alarm 2 (
A2.LNK
) and if supplied, Alarm 3 (
A3.LNK
).
8.5.2 Setting Alarm Type:
A high alarm will activate when a set point is exceeded. A low alarm will activate
whenever the value falls below a set point (including startup). An inhibited low alarm
must exceed the low alarm set point before it is enabled. Then it will work like a low
alarm. This is ideal on startup.
