Guralp Systems CMG-6TD - Manual (Page 27)

CMG-6TD Installing the 6TD
4.7 Rapid installation
The 6TD is specially designed for rapid installation, and may be fully
installed in a few hours. This section details a method of deploying 6TD
instruments with the minimum of additional equipment. This is
recommended for situations where seismic instrumentation needs to be
installed very quickly, e.g. to study a resumption of volcanic activity, or where
difficulty of access to the site prevents you from constructing a full seismic
pit. You should always construct a pit if possible (see section 4.5 on page 23),
since the data produced will be of significantly higher quality.
1. Prepare a hole of 60 – 90 cm depth to compacted subsoil, or down to
the bedrock if possible.
2. Clean the hole down to the bottom, and remove any loose material from
the mouth. Ensure that the bottom of the hole is relatively flat.
3. If the bottom of the hole is made of hard rock, you may need to put in
some loose sand or soil so that the sensor can be levelled.
4. Connect the sensor to cables for the GPS unit and power source. If
your 6TD has the Wi-Fi option, connect your antenna to the sensor.
MAN-T60-0002 27 Issue F - February 2014