As per the ISEE Seismograph User Guidelines the preferred coupling method is
burial, approximately 3 times the height of the package. The spikes should
be pressed firmly into the hole as with surface spiking. Then the soil
repacked around the package. Use care when removing the package. Do
not pull on the cable to loosen the package. If using a shovel do not nick
or cut the cable.
When burial is not an option, surface spiking may be acceptable. Firmly
press the package with the spikes into a cleared, level area. Test the
coupling by attempting to move the package with your hand. If the package
moves with minimal effort, the coupling is not sufficient.
Please refer to the ISEE Seismograph User Guidelines at
http://www.isee.org. |