How to test a pile using the CHUM for
Crosshole Sonic Logging (CSL)?

Prepare the pile with access tubes (usually one tube per 30cm/1' diameter)

Wait at least 5 days after casting

Cut and fill the access tubes with fresh water

Place depth encoders pullies or the first two tubes

Lower the two transceivers (Transmitter and receiver) into the tubes through the depth encoders

Start the CHUM software

According to the software instructions, pull both transceivers to the top of the tube at a speed of up to 2m/section

Inspect the results and continue with the other tube combinations