The logging can be done only when the
measurement is running (the instrument
performs a series of 1-second averages), from
the measurement start till the measurement
stop.
This means, for example, when the Level
measurement trigger is enabled, than when the
1-second measurement(s) is skipped because
the measurement trigger condition is not met,
logging will also be skipped, even if the Level
logger trigger condition is met.
Note: When logging is waiting for the level trigger the “level” icon
appears alternatively with the „curve” icon.
Trigger source
Only one measured result can be used as a trigger source (Source) for checking of the trigger condition in the
Level Meter mode, namely the output signal from the RMS detector coming from the first profile which is denoted
here as Leq(1) in the sound mode and RMS(1) in the vibration mode. This position does not become active (it is
not displayed inversely) and the text stated here remains unchanged.
Threshold level
The threshold level for the logger trigger (Level)
can be set with 1 dB steps in the range from
24 dB to 136 dB in sound mode and from
1mm/s
2
(60 dB) to 10 km/s
2
(200 dB) in vibration
mode.
Pre and Post trigger registration
The Pre position defines the number of results registered in the logger file before the trigger in the range: 0..50.
The Post position defines the number of results registered in the logger file after the trigger in the range: 0..200.
The period during which the logger results are
saved before or after the fulfilment of the
trigger condition can be calculated by
multiplying the value set up in the Pre or Post
positions by the value set up in the
Logger Step position (path: <Menu> /
Measurement / Logging / Logger Setup). The
result of this calculation is presented in the
same line for the Pre and Post parameters.
These parameters can perform double role. Firstly, if you wish to collect data right after or before the event that
caused triggering of the logging. Secondly, when it is necessary to have continuous logging, but the source is
oscillated near the threshold level. The extension of the registration window allows to avoid the effect of pulsation
on the continuity of registration.
5.4.5 Setting up markers – Marker Setup
Marker is used to mark (or highlight) special events during the measurement such as "airplane flight" and is
nothing but an indication of the beginning and end of the block of logger results in which the event occurred. In
case of point markers, there is no start and end of the marker, but only one record in the logger file. Markers are
activated in the result presentation views by pressing the arrow keys.
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