Sea-Bird Scientific SBE 25plus, User Manual

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Auxiliary sensors, current draw
of 100 mA Data collection current draw (T, C, P) = 95 mA = 0.095 A
Pump current draw = 150 mA = 0.15 A
Auxiliary sensor current draw = 100 mA = 0.10 A
Maximum data collection time ~ 14 Ah ÷ (0.095 + 0.15 + 0.10) ~ 40 hours
Auxiliary sensors, current draw
of 1000 mA Pump current draw = 150 mA = 0.15 A
Auxiliary sensor current draw = 1000 mA = 1.0 A
Maximum data collection time ~ 5 Ah ÷ (0.095 + 0.15 + 1.0) ~ 4 hours
Notes:
• If the internal battery voltage is less than 9.5 V for 20 seconds OR the external power
is less than 14 V for 20 seconds during data collection, the 25plus stops and the
software shows <Powerfail/>.
• Connect auxiliary sensors with a current draw of more than 1 A to J3 or J6 on the
25plus.
• The on-board lithium batteries are a back-up to the buffer and the real-time clock in
case of a failure of the main batteries. Battery removal has no effect on the clock and
the data in the buffer.
4.6 Plunger switch
The plunger switch is located at the end of the pressure housing and is
used to start and stop operation.
• Pull the switch out to stop the 25plus. Make sure the plunger is out
during setup, diagnostics, and when data is transmitted.
• Push the switch in to turn the 25plus on. If no commands are sent
within 2 minutes, the sensor goes into low power mode.
Set up sensor and verify operation
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