Siemens SITRANS P Betriebsanleitung Seite 132

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When the warning/alarm limit has been reached, the following applies:
1. "Alarm/Acknowledge
the request" resets the request / alarm message, but allows the timer
to continue to run. In this state, a new alarm or warning is not possible since the time limits
have already been exceeded.
2. "Reset timer" resets the request / alarm message, also resets the timer. It acknowledges
the interrupt or warning at the same time. The timer immediately starts running again from
zero and will report again when the warning/alarm limit is next reached. The next calibration
interval is therefore immediately active.
7.21.4 Min/max indicator
Description
The measuring transmitter provides three min/max indicator pairs, which you can use to
monitor the three measured variables Pressure, Sensor temperature, and Electronics
temperature for negative and positive peak values. For each measured value, a resettable min/
max indicator saves the maximum and minimum peak values in long-term storage in the two
non-volatile memories. Consequently, the values are available even after the device is
restarted. The min/max indicators are also updated during a simulation.
3UHVVXUHFXUYH
8SSHUGUDJLQGLFDWRUSRLQW
/RZHUGUDJLQGLFDWRUSRLQW
S
W
p Pressure t Time
Figure 7-16 Basic representation of min/max indicators
Operating functions through HART
7.21 Diagnostic functions
SITRANS P, DS III series with HART
130 Operating Instructions, 09/2012, A5E00047092-08
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