HACH LANGE ORBISPHERE 3654, Руководство пользователя, Страница: 45 / 58

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Maintenance and Troubleshooting
8.3.2 Installing the membrane
To install the new membrane, follow the steps below:
Note:
The membrane mounting surface must be clean and even (on
top of the sensor, where the membrane and sensor have contact).
Replace the membrane O-ring on the sensor head with a new
one.
Note:
The 29039.0 Nitril O-ring can be reused if it is still in good
condition. Membrane O-rings are part of the protection cap kit.
In the maintenance kit, pick up the two part membrane
mounting tool.
Install the sleeve over the sensor head (end with shoulder
downwards).
Note:
Once installed, a membrane cannot be reused. Avoid touching
the membrane with bare fingers, as this may affect its sensitivity.
To mount a
single
membrane:
•
Take a few membranes out of the storage box.
•
Using tweezers included in the kit, pick up one membrane
from the stack, and gently place it on the sensor tip.
•
Make sure it is centered.
To mount
dual
membranes:
•
Remove one 29562A secondary membrane along with
one piece of the separation paper from its box. Place the
membrane and paper, paper side down, on a clean flat
surface.
•
Remove a primary membrane along with its separation
paper.
•
With the separation paper on top of the primary membrane
place the primary membrane directly over the secondary
membrane, taking care to center the two membranes.
•
Rub your finger on the paper of the primary membrane to
remove any air bubbles between the membranes. The two
membranes should now be sandwiched together and
appear as one membrane.
•
Pickup the sandwiched membranes with tweezers and
remove the separation paper.
•
Gently place them on the sensor tip ensuring the
secondary membrane (29562A) is on the bottom.
•
Make sure they are centered.