EPOS-N - European Plate Observing System
Seismometers / vault construction
Stations: Upgrade/install notes
Ideas for improvements
Installation / Inventory
Last update: February 17, 2020, at 01:26 PM
6TD NOISE MEASUREMENTS, BERGEN, NOV 2012
The seismometer we use is Güralp model 6TD, a stand-alone unit that combines 3-component sensors, GPS input for time stamping, digitizer and recorder in one small cylindrical package.
The instrument requires 75 mA @ 12 Vdc input (without GPS attached).
Seismograph Güralp Mod. CMG-6TD.
Specifications (subset of relevance here; source here):
1) GPS not used. We will use 75 mA in power estimates.
We will use &TD with Serial number T6278 (4 GByte memory).
Güralp has found that, on average, three 100 samples per second streams consume around 50MB of storage a day.
So 4 GByte memory should provide 80 days storage capacity.
See also calibration records in section above.
6TD typical frequency response plot (magnitude & phase)
One connector on the instruments servers several purposes: GPS input (both RS232 serial and PPS [= Pulse per second]), power input, data output, as described below.
This control unit is intended for use with the model CMG-3 seismograph. We want to find out if and how this test unit can be used together with the model 6TD seismograph.
3TB handheld control unit
CMG-3 models with 26-pin mil-spec plug (02E-16-26P) have the following pin assignments: