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Then all you have to do to start logging for Trimeter and Scuba 50, 65, and 75 models is load batteries. For convenience,
you may wish to take a data display to the field so that you can activate logging right before you place the Scuba in the
water. Don’t forget to activate logging.
All you have to do to start logging for Scuba 35 and 40 models is load batteries and, when you get to the field, turn the
IBP switch on the top cap to “
ON
”. Don’t forget to activate logging.
Don’t forget that the blinking green LED tells you that you have adequate voltage to begin logging, and the blinking red
LED tells you that logging is indeed enabled.
5.6 Am I using battery pack power or cable power?
Most users log data using an Internal Battery Pack (IBP) or External Battery Pack (EBP). But you can also log using power
from a secondary power source (such as a solar-recharged storage battery located above the water surface) via the
underwater cable. If you have an IBP or EBP and a secondary power source attached, the Scuba will use power coming
from the secondary power source as long as its voltage is sufficient. If the Scuba cannot find adequate voltage in the
underwater cable, it will use the IBP or EBP. This scheme preserves your Scuba batteries when possible. Other
manufacturers, for reasons unknown, use the power source with the highest voltage, meaning that your Scuba batteries
may be consumed quickly. More information can be found in M-Scuba logging with uninterrupted external power supply
and M-Eight ways to power a Scuba.
5.7 Logging with an Internal Battery Pack
All Scubas may be ordered with an optional Internal Battery Pack (IBP), a watertight housing with a cassette for batteries
that is permanently fixed to the Scuba. Most IBP’s are used for logging, but they can also be used to power the Scuba
while it is connected to a data display.
5.7.1 Changing IBP batteries in Scuba 50, 65, and Trimeters and activating logging
1
Replace all batteries at the same time and use the same brand of battery.
2
Clean all moisture, dirt, grit and any other debris off the Scuba because you are going to expose sealing surfaces as
you change the batteries.
3
Grasp the clear battery sleeve that covers the battery housing and unscrew it until it detaches from the IBP body.
4
Remove the spent batteries and install the new ones carefully following the polarity diagram. Your Scuba is now
logging, if you have activated logging. De-activate logging if you don’t want to be logging now.
5
Clean all moisture, dirt, grit and any other debris off the exposed O-ring surfaces and the inside of the battery sleeve.
Add a small amount of silicone grease to the O-rings and to the inside of the battery sleeve where the O-rings will
seat.
6
Carefully screw the battery sleeve back into place. You don’t have to tighten it closely to the IBP body; finger-tight is
fine.
7
Remember that you must first activate Scuba logging by clicking the “
Scuba Logging is OFF
” hot button so that it
changes to “
Scuba Logging is ON
” (3.3, 5.5).
8
Remember to look for the red LED to blink five times to confirm that logging is activated, and the green LED blink
briefly to confirm that the Scuba is receiving adequate voltage to start logging.
