PPA5xx/15xx user manual
5-5
5.4 ALARM - alarm function
The PPA5xx/15xx has 2 independent alarms that can be
used to generate an audible warning:
sound the alarm if the value exceeds a threshold
sound the alarm if the value is below a threshold
sound the alarm if the value is outside a window
sound the alarm if the value is inside a window
The values to which the alarms are applied can be any of
the measurements selected for zoom. The alarm status is
also available as a logic output via the communications.
The first alarm also has the option to generate a variable
sound changing linearly as the value changes between two
thresholds.
To program an alarm, first select the functions for the
zoom; up to four measurements can be selected for the
display, the alarm is applied to any of them; then press
ALARM to invoke the alarm menu:
select which of the zoom functions is to be used
select the type of alarm
set the upper limit (if appropriate)
set the lower limit (if appropriate)
select whether the alarm is to be latched
select whether the alarm sounder is enabled
If the alarm latch is selected, then both alarms will
continue to sound even if the value returns to within the
normal boundaries. To clear the alarm, press HOME.
The alarm latch can also be set to HOLD the data so that
an event can be captured. The data on the screen will be
the measurement that first triggered the alarm condition.
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