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2.1 Data logger parameters
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Following, relevant settings for recording and saving performance data can be adapted to measurement re-
quirements by means of the configuration dialog of the PWB-Soft on PC/laptop/netbook/pocket PC:
• Identification (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 field under -
takes 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 field 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.
Identification/Short text
The fields Identification and Short text can be used for saving any descriptive information eg location 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. Interval 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 second sam-
ple rate. Additional to the threshold, a hysteresis can be specified
Furthermore, the data logger has an implemented sniff-mode. This mode is enabled in case alarm limits
have been adjusted. Whenever the device is not used, the sniff-mode saves energy and starts measurement
automatically.
Data logging starts in this mode only if the adjusted alarm limits are not exceeded or fallen below. If e.g. for
the device‘s pressure channel a lower threshold of 20 mbar is adjusted, data logging will not start until the
pressure value is above 20 mbar.
Note: The sniff-mode only takes effect at measurement start! When removing the device at the end of mea -
surement, logging does not stop automatically! The sniff-mode will only be activated again after reading and
restarting the device.
Important parameters to monitor thresholds are described as follows:
Storage mode
The storage mode specifies 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 redi -
rection to interval 2 is done where measuring is carried out as long as the threshold violation is cancelled (in
consideration of adjusted hysteresis values).