Guralp Systems CMG-3ESPCD Installation - Manual (Page 2)

Testing
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Switch on the power supply and measure the current
through the instrument. With the GPS connected and
running, the current should be around 120 mA. Once a
fix has been obtained, the digitizer will power down the
GPS, and the current will drop to around 80 mA.
Start the PC and run Güralp Systems’ Scream! software
(provided, or available for download.)
If you have not run Scream! before, the Setup window
will open automatically. Otherwise, choose File →
Setup... from the main menu and view the Com Ports
tab.
Set the Baud Rate to 38400 and click OK.
Data streams should start appearing in the main
window. This data will not reflect ground movements,
because the masses are still locked.
Look for the digitizer icon on the left side of the window,
and right-click on it. Choose Control..., and view the
Mass Control tab.
Click Unlock, and wait for a few minutes.
The top half of the digitizer icon on the left should
change from grey to green.
If the top half fails to turn green, there is a problem
receiving GPS signals. The status messages in the
****00 stream may help you diagnose the problem.
Select some data streams and double-click. A Waveview
window will open on the streams. Check that the output
responds to vibrations near the sensor.
Do not move the sensor whilst the masses are
unlocked. If you want to transport it, use the Mass
Control tab to lock the masses first.
Please refer to the full manual for detailed usage
instructions, calibration and troubleshooting.
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MSH-C3E-0002-B : Page 2 of 2