2 calibration methods – Guralp Systems CMG-5TD User Manual
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Calibration
If you want to repeat the calibration to obtain more precise values at a
particular frequency of interest, or to check that a sensor is still functioning
correctly, you can inject calibration signals into the system using a Güralp
digitizer or your own signal generator, and record the instrument's response.
6.1.3 Obtaining copies of the calibration pack
Our servers keep copies of all calibration data that we send out. In the event
that the calibration information becomes separated from the instrument, you
can obtain all the information using our free e-mail service. Simply e-mail
with the serial number of the instrument in the subject
line, e.g.
From: [email protected]
To: [email protected]
Subject: T5215
The server will reply with the calibration documentation in Microsoft Word
format. The body of your e-mail will be ignored.
6.2
Calibration methods
Three common calibration techniques are available:
•
Injecting a step current allows the system response to be determined in
the time domain. The amplitude and phase response can then be
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Issue D - April 2013