Sensors-Over-Range-Test

Sensors-Over-Range-Test

FAQ Sensors Over Range Test


1. Introduction
  • GeoSIG sensors can be tested by shaking each axis to see whether they reach the fullscale.

2. Required Tools
  • Sensor to test
  • Recorder/Datalogger to record sensor output
  • Software to read recorded sensor output (GeoDAS is recommended)

3. Check for Existing Procedures
  • Please check whether there is a project-specific procedure for your system to follow instead -- especially if your system is tied to an alarm system, as the execution of the over range test described in this procedure may cause an alarm.

4. Remove Offset
  • In GeoDAS window Stations: General Information, right-click on the station and choose Instrument Control.. -> Send a Request -> REMOVEDC -> [Send]

 
5. Shake Each Sensor Axis
  • Velocity sensors need only slight shaking to reach the full scale. Accelerometers need stronger shaking; more than 2g can be hard to reach when shaking by hand.

  • Shake the sensor horizontally in the direction of x-axis.
  • Shake the sensor horizontally in the direction of y-axis.
  • Shake the sensor vertically in the direction of the z-axis.
6. Access Over Range Test File
  • With default setting, a miniseed file (file prefix TRG_) will be uploaded to the Data folder of your station in GeoDAS (C:\GeoDAS_DATA\Data\)
  • If continuous recording (ringbuffer) is active, the over range test will also be visible in the latest ringbuffer (file prefix RBF_) unloaded to the folder DataStreams of your station (C:\GeoDAS_DATA\Datastreams\)
7. Check Over Range Test
  • Double-click the file to open it in GeoDAS
  • Cick into the yellow part of the window to make the cursor appear
  • Move the cursor to the positive and negative peaks of each axis (see red markings in the picture below)