6
Paul Wegener GmbH
2.1 Dataloggerparameters
Following, relevant settings for recording and saving performance data can be adapted to measu-
rement requirements by means of the conguration dialog of the PWB-Soft on PC/laptop/netbook/
pocket PC:
• Identication (eg company address)
• Short text (location, project number)
• Start measurement (date/time)
• Intervall 1 and interval 2
• Threshold defaults for analog channels
• Way to store performance data (ring memory / linear memory)
Start measurement
The start measurement determines date and time of measurement commencement. Hence, this
eld undertakes two important tasks. On the one hand, a synchronous measurement start for land
measuring can be set (all loggers commence measurement at the same time). On the other hand,
this eld is used for permanent deactivating measurement. As long as start measurement is not
reached, the logger is in energy saver mode. When the logger is not used, that way it can be simply
deactivated.
Identication/Short text
The elds Identication and Short text can be used for saving any descriptive information eg loca-
tion or project. The Short text can additionally be useful as default for saving performance data on
PC, laptop or netbook.
Interval 1 und interval 2
Two increments (sample rate) for logging and saving performance date can be set. Interval 1 is
adjustable from 1s up to 1h and is used for logging performance data during normal operation. In-
terval 2 can be set from 1s (optional 10ms) up to 1min. It will be activated once a threshold violation
is recognized.
Threshold monitoring
The data logger provides specifying thresholds and records threshold violations by means of a se-
cond sample rate. Additional to the threshold, a hysteresis can be specied
Important parameters to monitor thresholds are described as follows:
Storage mode
The storage mode species whether performance data are supposed to be always recorded or in
case of an alarm only. That way it provides event-driven data recording.
Sample mode
The sample mode can be set to „limit value monitoring“ or „standard“. At „standard“ mode, interval
1 values are measured and recorded (depending on memory saving mode). In case of a threshold
violation a redirection to interval 2 is done where measuring is carried out as long as the threshold
violation is cancelled (in consideration of adjusted hysteresis values).
The setting „permanent limit value monitoring“ means permanent sampling in interval 2. This leads
to an immediate identication of threshold violations. Thereafter, the memory interval 1 will be redi-
rected to interval 2. Please note that frequent sampling of transducers increases power consump-
tion of data logger and decreases economic life-time of the battery!
Shorted alarm storage
In case of a threshold violation normally data recording will be continued with interval period 2. The
period of data recording can be much shorter than expected. To avoid it, the option „shorted alarm
storage“ can lower that period of time where interval 2 for storage is used. The storage is limited to
a maximum of 2 x interval 1 (eg 2 x 5 min). Subsequently, it is continued to measure in interval 2
but recorded just with the cycle of interval 1.
Password protection
The conguration can be protected via password against unauthorized access. Without knowledge
of password, it is not possible to clear stored data or to change conguration of the data acquisition
system.
