User Manual

Maintenance a n d Troubleshooting 8-13
7. Evaluate the pressure depth sensor performance for a limited
time to ensure no damage has occurred to the sensor
electronics.
Replacing the Desiccant
When replacing the desiccant inside the pressure depth sensor dryer
tube, use indicating beads that are approximately 0.16 inches in
diameter. Smaller beads may be able to escape the dryer tube,
entering the clear plastic tubing leading to the sensor connector.
Desiccant beads of the appropriate size for this dryer tube are
available through ADS (p/n 901-11055-00).
Replace the desiccant in the following way:
1. Clip the cable ties securing the dryer tube to the monitor, when
applicable.
2. Use a 16-mm nut driver to remove the inset nut at the free end
of the dryer tube (end of the tube opposite the brass barbed
fitting). Do not use pliers to remove this nut from the tube!
Warning: Do not attempt to access the desiccant in the
dryer tube through the end of the tube with the brass
fitting! This fitting is not designed for removal. Removing
the fitting will damage the dryer tube and break the
moisture seal on that end of the tube.
3. Use needle-nose pliers to gently remove the black foam
packing material just inside the opening.
4. Pour out the old desiccant beads from the dryer tube.
5. Refill an equivalent amount of new desiccant beads into the
tube.
6. Carefully replace the foam packing into the dryer tube.
7. Replace and tighten the nut on the dryer tube.
8. Secure the dryer tube to the monitor using cable ties, when
applicable.