Guralp Systems CMG-3T - Manual (Page 8)

CMG-3T
Serial number
The sensor's serial number can be found on the label stuck to the top
lid of the sensor. It is also stamped onto the side of the sensor base,
next to the N/S indicator, and into the lid itself. You should quote this
serial number if you need assistance from Güralp Systems.
Handling notes
The 3T is a sensitive instrument, and is easily damaged if mishandled.
If you are at all unsure about the handling or installation of the device,
you should contact Güralp Systems for assistance.
•
Do not bump or jolt any part of the sensor when handling or
unpacking.
•
Do not kink or walk on the data cable (especially on rough
surfaces such as gravel), nor allow it to bear the weight of the
sensor.
•
Do not connect the instrument to power sources except where
instructed.
•
Do not ground any of the signal lines from the sensor.
•
Do not move the instrument whilst the masses are unlocked.
You should report any sign of loose components, or any sound
of parts moving inside the instrument, to Güralp Systems.
Connections
The instrument has a single connector, which can be joined using the
cable provided to a digitizer or breakout box. Individually shielded
twisted-pair cabling must be used for the sensor outputs, control lines
and power supply. If you need to make up a suitable cable, you should
confirm the cable type with Güralp Systems.
Using a digitizer
The 3T can be connected directly to any Güralp Systems digitizer
using the signal cable provided. This is the simplest way to use a 3T
instrument. All the instrument's functions are available through the
digitizer, including centring, locking and unlocking.
We recommend that you keep the digitizer near the instrument if at all
possible, to minimize the length of analogue cable required. Once
digitized, the signal is robust to degradation by noise or attenuation.
Keeping the digitizer in the quiet, stable conditions of a seismic
installation also provides it with an optimum environment for the on-
8 Issue N