TURTLE
TOUGH
®
14
Pressure Compensation Membrane Replacement
Pressure compensation membranes have to be replaced when the sensor has
been stored over a longer period without being kept in water and the mem-
branes have lost their elasticity; or when the membranes have been damaged.
When measuring often at great depths, the pressure compensation membrane
should be checked regularly.
The pressure compensation membrane can be changed as the following describes:
1. Unscrew the side pressure membrane ring nut with the Pressure Compensator
Tool TT-TOUGH-DO-SWT or a set of Circlip pliers
2. Remove the pressure washer.
3. Remove the old pressure membrane and the O-Ring.
4. Refill with electrolyte.
Note:
If the electrolyte comes into contact with your skin, rinse the affected part
immediately under running water.
5. Install the O-Ring and a new pressure compensation membrane.
6. Refit the pressure washer.
7. Finally put on the pressure ring nut and screw it on carefully.
Using the Membrane Positioner
Use the Membrane Positioner TT-TOUGH-DO-MP to easily replace the cathode
membrane without any wrinkles.
Follow these steps for replacing the membrane using a Turtle Tough Membrane
Positioner:
1. Pull off the frame.
2. Put the Positioner on a table.
3. Centre one membrane on the Positioner.
4. Press the frame over the Positioner - the membrane gets pre-stretched like
on a drum.
5. Hold the Turtle Tough sensor vertically, with the tip upwards.
6. Put one drop of electrolyte onto the cathode.
Note:
If the electrolyte comes into contact with your skin, rinse the affected part
immediately under running water.
7. Place the Positioner over the sensor - so that the membrane touches the
cathode - and let it hang down by its own weight.
8. Gently push down and hold the red collar in its position, then remove the
Positioner by sliding it down.
9. Push the red collar down until the groove of the O-Ring is visible (but not
further!) Continue with replacing the O-Ring and the second red collar as
usual (see: Replacement of the cathode membrane or Sensor refurbishment).
