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6.9
Manual Recording
A manual recording is started by pressing the Record button in the Setup tab of the
Instrument_Manager application.
Every time a recording is started, a new record is created in memory and filled until the recording is
stopped. That record is time-stamped, so the signals can be displayed with respect to absolute
date/time. Records are stored sequentially in the instrument's memory. There is no limit to the number
of records that the memory can contain, only a limit to the total size of the data recorded. The
Instrument_Manager application displays the total memory recording time as a function of the various
setup parameters.
After (or while) recording, the records contained in memory can be downloaded from the instrument
and observed or exported. In case a recording is ongoing the last record is only displayed up to the
present time.
The recording is stopped automatically when the recording memory is full. This way a new record will
not overwrite an old one.
The recording memory is non-volatile, so there is no risk of losing the data that has already been
recorded, even in the case of a battery failure.
Note:
It is perfectly legal to find empty records in memory. That occurs typically when a recording is
started and stopped quickly (for a time shorter than the log interval), before any data had time to be
written to memory. In that case only the time-stamp is written to memory.
An empty record can also occur when a recording was started but no data was selected to be
recorded.
To start a recording manually follow the steps below:
1. Select the type of signal (Acceleration or Velocity), and select the sampling frequency.
2. Select the type of data to record (raw signal, signal statistics or RMS levels). Select the axes
and/or statistics to record.
3. Select the log-interval. Note that the total recording time is automatically calculated and
displayed by the Instrument_Manager application, as a function of the log-interval and type of
data selected. The log-interval is adjustable in 125 ms increments, from 125 ms up to 2H.
4. If recording RMS levels, select the time constant used to smooth the measured sound levels
for L-min and L-max. Choose a time constant around 125 ms to be able to detect short
transients. Choose a time constant around 1s to provide cleaner more stable RMS levels. Or
adjust to another value, as required by the application.
5. When ready to start a recording immediately, simply press the Record button. Press Record
again to stop the recording.
6.10 AutoRec Recording
AutoRec allows the recording to start when the signal measured passes a preset limit. The recording
stops after the signal has been measured below the preset limit for at least equal the preset duration.
User's Manual
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