Nanometrics TC120-PH1, Руководство пользователя

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Chapter 3
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Performing a Surface Vault Installation
Trillium Compact User Guide
16889R5
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2014-03-04
16
installing model number TC120-PH1 or TC20-PH1 as a surface vault seismometer, you will
also need the optional levelling bubble (Nanometrics part number MSC0225) and the
adjustable levelling feet kit (Nanometrics part number 17245). See Table 1-1 “List of cables
and accessories” on page 4 for a description of these items. See also Section 3.7.2
“Insulating with a Rigid Foam Box” on page 23 for another method of insulating the
seismometer.
To perform this type of deployment,
1. Plug the cable into the seismometer.
2. Follow Section 3.5 “Best Practices for Alignment and Levelling” on page 19 to properly
align and level the seismometer.
3. Place the insulating cover over the seismometer, fitting the cable exit slot over the
cable. For more detailed instructions, see Section 3.8 “Installing a Trillium Compact in
the Insulating Cover” on page 23.
4. Power the seismometer, and using a digitizer (see Chapter 5 , “Configuring Your
System” ) or the Trillium Compact Web interface (see Chapter 6 , “Configuring Serial
Communications” and Chapter 7 , “Using the Web Interface” ), verify a level installation
by checking that the mass positions are within an acceptable range (at or very close
to zero).
3.3.2 Temporary Installations on Rock
Installations on rock are at the surface level and the seismometer must be in a sealed,
insulated enclosure to protect it from the elements or other environmental disturbances. To
achieve optimal levelness and insulation, the following optional equipment is
recommended: a levelling cradle (Nanometrics part number 16863) and a Carrying Case
/ Insulating Cover (Nanometrics part number 16862). In addition, if you are installing model
number TC120-PH1 or TC20-PH1 as a surface vault seismometer, you will also need the
optional levelling bubble (Nanometrics part number MSC0225). See Table 1-1 “List of
cables and accessories” on page 4 for descriptions of these items. See also Section 3.5
“Best Practices for Alignment and Levelling” on page 19 and Section 3.7.2 “Insulating with
a Rigid Foam Box” on page 23 for other methods of levelling and insulating the
seismometer.
To perform this type of deployment,
1. Locate the flattest available surface for your installation.
2. Plug the cable into the seismometer and secure it to the side of the unit with a tie
wrap.
3. Remove the feet from the seismometer and retain for future deployments.
4. Follow Section 3.5 “Best Practices for Alignment and Levelling” on page 19 and
Section C.1 “Using the Levelling Cradle” on page 74 to properly align and level the
seismometer in the levelling cradle.
5. Lay sand in a ring around the levelling cradle to create a flat and level sealing surface
for the insulating cover.