Precision Measurement Engineering, Inc.
(760) 727-0300
www.pme.com
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3.2 Opening and Closing the miniDOT Logger
The miniDOT Logger’s circuitry is contained in a waterproof housing that must be opened.
Unscrewing the white pressure housing from the black end cap opens the miniDOT Logger.
This is similar to opening a flashlight. Turn the white pressure housing counter clockwise
relative to the black end cap. Close the miniDOT Logger by reversing this procedure after
being sure that the o-ring is free from debris. Lubricate the o-ring occasionally with silicone
oil intended for buna-N o-ring material.
Please attempt to handle the miniDOT Logger by only touching the aluminum chassis. Try
not to touch the circuit board.
When closing the miniDOT Logger, inspect the o-ring and the interior of the white pressure
housing for debris. Lubricate the o-ring, and screw the white pressure housing onto the black
end cap until the white pressure housing just touches the black end cap. Do not tighten! The
miniDOT Logger tends to get a little tighter during deployment.
If you cannot open the miniDOT Logger by yourself, then find another person with strong
hands. This person should grip the black end cap while the other person turns the white
pressure housing.
Caution: Do NOT remove the stainless screws in the black end cap. If this is done, then the
miniDOT Logger will be permanently damaged and must be returned for repair.
3.3 Electrical Connections and Controls
Removal of the cover reveals the miniDOT Logger’s connections and controls, shown below.
