Gecko Compact Product User Manual
Also see for Blast: Product user manual
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Contents
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15Trigger & AlarmThe primary function of the Gecko is as a continuous data recorder, but we realise thattriggering is still required to help find events of interest and to control alarms. The Geckohas two Level trigger processes and an STA/LTA trigger process that can be enabled anddisabled. The Gecko also monitors some system parameters that can generate an alarm.Trigger & Alarm> LevelSTA/LTAAlarm OutputsSystem AlertsThe Gecko logs the trigger time to a text file that can be used to help you find the data inthe continuous archive. This “trig.txt” file is located in the top level folder of the SD card.We have developed a small application that can be copied to the Gecko SD card and runfrom a Windows computer that will scan the trig.txt folder and then automatically extractthe continuous data from the archive, creating a discreet file in a folder called “reports” onthe SD card that contains one minute of data before and after the trigger time. At the sametime a PDF report is generated for the triggered event, with files named based on the localtime in your PC. This app simplifies vibration monitoring reporting for non-technical users.Level TriggeringBy default each Level trigger process is OFF, but simply toggle this using the Right button.Level Triggering> Enable: OnSet Trigger LevelThe Gecko will trigger on the vector sum of the 3D sensor channels. The percentage level ofthe trigger threshold will affect the ground motion units displayed on the Set Trigger Levelscreen. For accelerometers, the estimated MMI and PEIS intensity that relates to this triggerthreshold will also be displayed.% of Full Scale5.00 %0.10316 gMMI: VI PEIS: 6Use the Up/Down buttons to change the number values from 0.01% to 99.99% of therecorder’s full scale range. The line below will update with the ground motion value basedon the calibrated sensor sensitivity and gain of your Gecko. |
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