Section 2: Description of SBE 19plus V2
14
Batteries
For the main battery, the SBE 19plus V2 uses nine D-cell alkaline batteries
(Duracell MN 1300, LR20), or rechargeable Nickel Metal Hydride (NiMH) or
Nickel-Cadmium (Ni-Cad) batteries. If necessary, carbon-zinc or mercury cells
can be used.
On-board lithium batteries (non-hazardous units that are unrestricted for
shipping purposes) are provided to back-up the buffer and the real-time clock in
the event of main battery failure or exhaustion. The main batteries may be
replaced without affecting either the real-time clock or memory.
Battery Endurance
The standard alkaline battery pack has a nominal capacity of 14 amp-hours;
for planning purposes, Sea-Bird recommends using a conservative value of
10.5 amp-hours. The optional NiMH battery pack has a nominal capacity of
8 amp-hours. The optional Ni-Cad battery pack has a nominal capacity of
4.4 amp-hours.
Current consumption and sampling times vary greatly, depending on:
• instrument configuration - inclusion of optional SBE 5T or 5P pump and/or
auxiliary sensors, and
• user-programmed sampling parameters - Profiling or Moored mode;
if in Moored mode, the pump mode, number of measurements per sample,
and delay before sampling influence power consumption.
Examples are shown below for several sampling schemes for both Profiling and
Moored mode.
Profiling Mode Examples
Example 1 - standard alkaline batteries, SBE 5M pump, no auxiliary sensors
Sampling current = 70 mA
Pump current = 100 mA
Maximum sampling time ≈ 10.5 amp-hours / (0.070 Amps + 0.100 Amps) ≈ 61 hours
Example 2 - standard alkaline batteries, optional SBE 5T pump, auxiliary sensors drawing 100 mA
Sampling current = 70 mA
Pump current = 150 mA
Auxiliary sensor current = 100 mA
Maximum sampling time ≈ 10.5 amp-hours / (0.070 Amps + 0.150 Amps + 0.100 Amps) ≈ 32 hours
Notes:
• See Specifications for power
requirements.
•
If the 19plus V2 is logging data and
the battery voltage is less than the
battery cut-off, the 19plus V2 halts
logging and displays a low battery
indication in the data. See
BatteryType= command in
Command Descriptions in Section 4:
Deploying and Operating SBE
19plus V2 for cut-off values for
various battery types.
•
See Data Storage and Specifications
for data storage limitations.
Note:
See Replacing / Recharging Batteries
in Section 5: Routine Maintenance
and Calibration.
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