Print version Configuration options & accessories -- 5T or 5P
The pump module is a compact unit consisting of a centrifugal pump head and a long-life, brushless, DC, ball-bearing motor. The pump impeller and electric drive motor are coupled magnetically through the housing, providing high reliability by eliminating moving seals. The 5T has a 10,500-meter (34,400-ft) titanium housing; the 5P has a 600-meter (1960-ft) plastic housing. The operational characteristics of the 5T and 5P are identical.
The pump is a primary component in the SBE 9plus CTD and SBE 25 / 25plus Sealogger CTD. It is also used as optional equipment on SBE 16plus V2, 16plus-IM V2, and 19plus V2 SeaCAT CTDs. The pump flushes water through the conductivity cell at a constant rate, independent of the CTD's motion, improving dynamic performance. It may also be suitable for custom applications, where pressure heads are less than 300 cm of water and flow rates are less than 100 ml/sec.
The pump is configured by selecting standard or low voltage, and one of several motor speed options. Speed options of 1300, 2000, 3000, or 4500 rpm have been established to meet flow rate requirements for Sea-Bird applications. Other speeds can be set by adjusting a potentiometer.
Motor speed and pumping rate remain nearly
constant over the entire input voltage range (less than 1% change in speed for a
1-volt change in supply voltage). The unrestricted
flow rate with no head is 100 ml/second * at 2000 rpm. Flow changes are nearly
linear with speed changes. With unlimited power supply current, turn-on surge is
1.8 Amps * (maximum), which drops to steady state in 0.25 seconds *. If power supply current
is limited to 200 milliAmps *, the motor comes up to speed in 0.30 seconds *.
A series diode is installed in the input power line to prevent damage if wires are
accidentally reversed. Pumping rates and motor current for various applications
are shown below.
Standard input range (#3 winding; 1300 - 3000 rpm) : 10 - 18 VDC
Standard input range (#3 winding; 4500 rpm): 12 - 18 VDC
Low input range (#3 or #5 winding; 1300, 2000 rpm only) : 6 - 16 VDC
SBE 5T -- 0.7 kg (1.5 lbs) in air, 0.3 kg (0.7 lbs) in water
SBE 5P -- 0.5 kg (1.0 lb) in air; 0.1 kg (0.2 lbs) in water
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1300 & 2000 RPM
(2000 RPM version typical for SBE 16plus V2, 16plus-IM V2, or 19plus V2 with pumped auxiliary sensors)
(typical for SBE 9plus)
Flow through cell only:
Pump Speed Setting
vs. Flow Rate
(typical for SBE 9plus,
25, and 25plus)
Pump Speed Setting
ADDITIONAL INFORMATION / LINKS:
Documentation -- manual, photos, technical papers, application notes, etc.
Sales Information -- options, accessories, cables, mount kits, spares, etc.
Links to Other Instruments of Interest
Specifications are subject to change without notice.
Sea-Bird Home Phone: (+1) 425-643-9866 Skype: sea-bird-electronics E-mail: firstname.lastname@example.org