13
Placement
Method
Instructions
dig a hole to bury the transducer block. However, once vibration levels exceed
.25 ips (6 mm/s), consider burying the transducer block.
Sand Bag
on Top of
Transducer
Block
As a last resort it may be necessary to sandbag the transducer block to
eliminate slippage. Only use this option when burying, bolting, or spiking the
transducer block is not permissible or acceptable. The effectiveness of
sandbagging will depend on the vibration level and the weight of the sand
placed on the transducer block. Note that the higher the vibration level being
recorded, the heavier the sand bag should be. For vibration levels less than
1.0 ips (25.4 mm/s) a 15 pound (7 kg) bag of sand should be adequate. Place
the sand bag on top of the transducer block so that the sand can form around
the block to provide good coupling with the transducer block and prevent
horizontal slippage. In an emergency situation, you can fill a plastic trash bag
with sand to provide an adequate anchor for the transducer block.
