© 2018 Valeport Ltd
0606829a - MIDAS CTD+
Page 20
8. Reattach the connector to the electronics if necessary, and gently slide the battery pack back into
the tube, ensuring that the fixing holes are correctly aligned. Again, take care not to scratch the
bore.
9. Replace the 3 x M5 titanium screws, using a small amount of copper grease (supplied). Do not
force the screws, just tighten firmly.
10. Finally, slide the instrument back into the protective cage. Note that the clamping brackets are
offset, and that the sensor end of the instrument should lie at the long end of the cage.
4.2. O-Ring Sizes
The MIDAS CTD+ Multi-Parameter Logger with CTD is kept watertight by using o-ring seals. Double
o-ring seals are used at each end of the titanium housing, although the customer should have no
reason to open any seal other than that at the battery end. To help preserve the watertight nature of
the equipment, please observe the following guidelines:
·
Ensure that all o-rings are free from cuts, abrasions or perishing.
·
Ensure that all-o-rings are free from dirt, grit, sand, hair and other foreign objects.
·
Whenever an o-ring seal is opened (e.g. when changing batteries), ensure that a light coating of
silicon grease is applied to the o-ring before the seal is closed.
·
Ensure that all o-ring protected seals are tightened.
A set of spare o-rings is included with the equipment. If an o-ring needs replacing, be sure to use
the correct size. If obtaining further spare o-rings from an alternative source, be sure to obtain the
correct material (signified by the last 4 digits of the o-ring code number).
O-ring size:
200-158-4470
Anti-Extrusion ring size:
158
