Sea-Bird Electronics SBE 38 Bedienungsanleitung PDF herunterladen (Seite 109)

Manual revision 006 Appendix II: Electronics Disassembly/Reassembly SBE 19plus V2

109

Appendix II:

Electronics Disassembly/Reassembly

Disassembly

1. As a precaution, upload any data in memory before beginning.

2. Remove the two Phillips-head screws holding the conductivity cell guard

to the housing. Do not remove the two screws holding the conductivity

cell guard to the sensor end cap.

3. Remove the Phillips-head screw holding the sensor end cap to

the housing on the side opposite the conductivity cell guard.

4. Remove the sensor end cap (with attached conductivity cell and

cell guard) and electronics:

A. Wipe the outside of the sensor end cap and housing dry, being careful

to remove any water at the seam between them.

B. Slide the end cap and attached electronics out of the housing.

C. The electronics are electrically connected to the battery compartment

bulkhead with a Molex connector. Disconnect the Molex connector.

D. Remove any water from the O-rings and mating surfaces inside the

housing with a lint-free cloth or tissue.

E. Be careful to protect the O-rings from damage or contamination.

Reassembly

1. Reinstall the sensor end cap, conductivity cell and guard, and electronics:

A. Remove any water from the O-rings and mating surfaces in the

housing with a lint-free cloth or tissue. Inspect the O-rings and

mating surfaces for dirt, nicks, and cuts. Clean or replace as

necessary. Apply a light coat of O-ring lubricant (Parker Super

O Lube) to the O-rings and mating surfaces.

B. Plug the Molex connector onto the pins on the battery compartment

bulkhead. Verify the connector holes and pins are properly aligned.

C. Carefully fit the end cap and electronics into the housing until the

O-rings are fully seated.

2. Reinstall the three screws to secure the end cap.

3. Reset the date and time (DateTime=) and initialize logging (InitLogging)

before redeploying. No other parameters should have been affected by the

electronics disassembly (send GetSD or DS to verify).

Note:

Before delivery, a desiccant package

is inserted in the electronics

chamber, and the chamber is filled

with dry Argon gas. These measures

help prevent condensation. If the

electronics are exposed to the

atmosphere, dry gas backfill with

Argon and replace the desiccant

package. See Application Note 71:

Desiccant Use and Regeneration

(drying) for desiccant information.

Battery replacement does not affect

desiccation of the electronics, as no

significant gas exchange is possible

unless the electronics PCBs are

actually removed from the housing.

CAUTION:

Use caution during disassembly and

reassembly to avoid breaking the

conductivity cell.

Remove screw

(2 places)

Do not remove screw

attaching guard to

sensor end cap

(2 places)

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