DeltaOHM HD31, Руководство по эксплуатации

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HD31
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V1.6
4. The instant value is automatically zeroed.
4.4.2 P
EAK VALUE RESET
The peak value detected by the probe connected to PP471 module can be reinitialized and set
equal to the instant value:
1.
Press SELECT to display the PEAK command in the command bar, then select the com-
mand by pressing F2 .
Fig. 4.4.3: PEAK command
2. Select inputs A , B or C the probe is connected to by pressing F1, F2 or F3 respectively.
Fig. 4.4.4: selecting the probe for peak value reset
3. The peak value is reset to the instant value.
Peak value reset during logging:
If the logging interval is lower than 60 seconds, the peak value is not zeroed: the acquired
value is therefore the highest peak since acquisition startup.
For logging intervals equal to or higher than 60 seconds, the peak value is on the contrary re-
initialized after each acquisition: the stored peak value is therefore the one related to the sin-
gle interval between two subsequent acquisitions.
Two different operation modes have been chosen for this reason: when the logging interval is
short, the set of the instant measures represents closely enough the pressure trend over time.
In the case of long intervals, the mere knowledge of the pressure value of each interval and of
the absolute peak value doesn’t provide sufficiently precise information: knowing each peak
value between two subsequent samplings provides additional information on the pressure time
trend.