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1 mass control – Guralp Systems CMG-3EX-EAM User Manual

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CMG-3EX-EAM Digital Broadband Seismometer

A power and data connector, labelled DATA;

A GPS receiver connector, labelled GPS;

Five coloured push-buttons (described below);

A red LED (next to the yellow push-button) to indicate when

data is being flushed to storage (described below); and

Two LEDs, one red, one green, next to the black push-button,
to indicate the progress of locking, unlocking and centring

operations.

The five connectors, NET, GPIO, USB, DATA and GPS, are connected
internally to the embedded acquisition module and are described in

MAN-EAM-0001.

The use of the “North” indication and the bubble level are described in
MAN-C3E-0001.

The use of the push-buttons and LEDs are described in the following

section.

3.1 Mass Control

The sensors' masses can be locked, unlocked and centred using the

digitiser's command line, the embedded acquisition module's text or
web interface, Scream! software or the push-buttons on the top of the

instrument. This section describes how to use the push buttons.

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