1 introduction, 1 unpacking and handling – Guralp Systems CMG-EDU User Manual

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CMG-EDU

1 Introduction

The CMG-EDU is an ultra-compact single-axis broadband seismometer

designed specifically for educational uses. It is available in either
vertical or horizontal form.

The CMG-EDU is ready to record ground movements as soon as you

provide it with power. It does not have to be unlocked or centred as
long as its base is within 3 ° of horizontal. For the best results,

however, you should install where possible on a hard, near-horizontal
surface, preferably underground. See

for recommendations. Also supplied is a Güralp Systems CD24E1

compact single-component digitizer, and a GPS unit.

Each package 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.

1.1

Unpacking and handling

The CMG-EDU instrument is delivered in a single case, with specially

designed packaging. You should reuse this case whenever you need to
transport the sensor. Please note any damage to the packaging when

you receive the equipment, and unpack on a safe, clean surface. The
package should contain:

•

the seismometer with attached signal cable;

•

the digitizer;

Issue A