Sea-Bird Scientific Deep SeapHOx V2, User Manual

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Section 7 Maintenance
N O T I C E
When sensor is not in use, make sure that the wet cap is in place and is filled with clean seawater.
Do not put the sensing elements in fresh water: it may cause data to be unstable and damage to
the sensor.
N O T I C E
Do not leave the sensor in direct sun. Heat over 35 °C can cause damage to the sensor.
N O T I C E
Do not touch the sensing elements. They are sensitive to electrostatic discharge (ESD).
N O T I C E
Use only the batteries recommended by the manufacturer as replacements. Do not mix
chemistries, V-Ah, or new and used batteries.
7.1 Remove or attach wet cap
Make sure that the wet cap is filled with clean seawater during storage. The sensing
element and reference electrodes
must be kept wet with either the anti-fouling guard or
the wet cap, even if the sensor is out of service for a few minutes.
1. Put the sensor on a flat surface.
2. To remove the wet cap:
a. Use a flat blade screwdriver to loosen one of the large red plastic plugs on the
wet cap.
b. Turn the sensor so that the seawater in the cap drains out.
c. Use a 5/32" hex key to remove the three 10-32 x 5/8" socket head cap screws
that secure the wet cap to the end flange. Keep the screws.
3. To remove the anti-fouling guard:
a. Use a 5/32" hex key to remove the three 10-32 x 5/8" socket head cap screws.
Keep the screws.
b. Remove the anti-fouling guard from the sensor.
4. To attach the wet cap:
a. Put the wet cap O-ring into the groove at the bottom of the cap. Make sure that
the O-ring is not twisted or pinched. Do not use O-ring grease near the sensing
element and reference electrode.
b. Put the wet cap over the element and electrode. Make sure that the O-ring
touches the face of the end flange.
c. Use the three 10-32 x 5/8" socket head cap screws to secure the wet cap to the
end flange.
d. If necessary, remove the one of the plugs and fill the wet cap with clean
seawater.
e. Replace the plug. If the cap is too full, the extra seawater will be pushed out
when the plug is tight. Do NOT overtighten.
5. If the wet cap will be used as a flow cell, make sure it is installed in the orientation
below so that sufficient water flows through the sensing elements.
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