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e) Flow Alarm Power On Delay (Numerical entry)
Sometimes it is convenient to enable the Flow Alarm only after a specified power-up delay
interval. The “Flow Alarm Power On Delay” option allows the user to set a specified time
interval which must elapse from the moment of the device power-up event before the Flow
Alarm function will be activated. Valid settings are in the range of 0 to 3600 seconds. The
default value is 0: no delay.
f) Flow Alarm Action Latch (Tabular entry)
The Flow Alarm Action Latch settings control the Latch features. If SSR output is assigned to
the Flow Alarm event, in some cases the Flow Alarm Latch feature may be desirable.
The following settings are available: Enabled or Disabled. By default, the Flow Alarm is non-
latching, which means that the Alarm action is indicated only while the monitored Flow Rate
value exceeds the specified conditions that have been set.
6.4.9 Submenu “Gas Pressure Alarm”
The DPM provides the user with a flexible Alarm system that monitors the Fluid
Pressure for conditions that fall outside configurable limits and provides visual
feedback for the user via the OLED, status LED or an SSR output. The
Pressure Alarm has several attributes which may be configured by the user via
the OLED/joystick interface or digital communication interface. These attributes
control the conditions that cause the Alarm to occur and specify actions to be
taken when the pressure reading is outside the specified conditions.
PressureAlarmconditionsbecometruewhenthecurrentpressurereadingisequalto,
higher than or lower than the corresponding values of High and Low Pressure Alarm
levels.
Alarm action can be assigned with apreset Delay Interval (0-3600 seconds) to activate
the SSR output. The Latch Mode control feature allows SSR output to be latched on or
followthe corresponding Alarm status.
The following settings are available for the Pressure Alarm (see
a) Pressure Alarm Mode (Tabular entry)
This function determines whether the Pressure Alarm is Enabled or Disabled,
the two selections available. ThedefaultentryisDisabled. Alarm Mode selections
can be set with the Joystick
UP
and
DN
buttons and are accepted by pressing the
joystick equivalent of an
ENT
button.
