Campbell OBS-3A Especificações descarregar pdf (Página 55)

Section 10. Specifications

MEASUREMENT RANGE

Turbidity (AMCO Clear)............................... 0.4 to 4,000 NTU

Mud (D

=20μm)

..........................................

0.4 to 5,000 mg/l

Sand (D

=250μm)

........................................

2 to 100,000 mg/l

Pressure

........................................................ 0 to 10, 20, 50, 100, or 200 m

Temperature................................................... 0

to 35

Conductivity (salinity) ................................... 0 to 65 mS/cm (40 PSU, o/oo)

ACCURACY

Turbidity (AMCO Clear, 0-2,000 NTU)........ <2.0%

Mud (0.4-4,000 mg/l) ................................... 2.0% of reading

Sand (0.4-60,000 mg/l) ................................. 3.5% of reading

Pressure.......................................................... ±0.5% full scale

Temperature................................................... ±0.5

Conductivity .................................................. 1%

OBS SENSOR

Frequency ...................................................... 5 Hz

Drift over time ............................................... <2% per year

Drift over temperature ................................... 0.05% per

OTHER DATA

Maximum size sample .................................. 2048

Sampling rate................................................. 1 to 25 Hz

Maximum data rate........................................ 25 Hz

Data capacity ................................................. 8 Mbytes

Maximum number of data lines ..................... 200,000

Battery capacity ............................................. 18 Ahr

Maximum battery life ................................... 8,000 hours

Data protocols................................................ RS-232 / RS-485

Maximum housing depth .............................. 300 m (984 ft)

Infrared wavelength ....................................... 850 nm

Operating temperature range ......................... 0

to 35

Storage temperature range ............................. -20

to 70

PHYSICAL

Length / diameter .......................................... 362 mm (14.3”) / 76 mm (3.0")

Weight (w/o batteries) ................................... 1.5 kg (3.4 lbs)

Weight (submerged) ..................................... 0.2 kg (0.5 lbs)

Connector....................................................... MCBH-8-FS, wet-pluggable

SHIPS WITH

CSI # 21229 Accessory Kit

Resource CD

CSI # 20919 Software Support CD

REPLACEMENT PARTS

Alkaline D cells and the components of the 21229 Accessory Kit can be

purchased as replacement parts. Campbell Scientific model numbers and

product descriptions follow:

CSI # 20990 End Cap O-ring

CSI # 21145 Pressure Sensor Spring Clip

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Campbell OBS-3A Especificações Página 55

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