Guralp Systems CMG-5T User Manual
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CMG-5T
frequency pass band is flat to acceleration from DC to 100 Hz
(although other low pass corners from 50 Hz to 100 Hz can be
ordered.) A high frequency option provides flat response from DC to
200 Hz.
Each seismometer is delivered with a detailed calibration sheet
showing its serial number, measured frequency response in both the
long period and the short period sections of the seismic spectrum,
sensor DC calibration levels, and the transfer function in poles/zeros
notation. Installation is simple, using a single fixing bolt to fix the
sensor onto any surface. No sensor levelling is required.
Optionally, you can use a Güralp Control Unit (CU) and Breakout Box
(BB) to distribute power and calibration signals to the sensor and to
receive the signals it produces. The CU can also trim DC offsets during
installation, if required. It is available in both rack-mounted and
water-resistant portable formats. The accelerometer housing itself is
completely waterproof, with a hard anodised aluminium body and
“O”-ring seals throughout. The photograph below shows two
instruments under test by long-period total immersion in a tank of
water.
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