Flow Meter System Specifications

Measurement Range
Performance Accuracy
Operating Temperature Range
Power Requirements
Electronics
Flow Tube
Operation
Calibration
Flow Conditions

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Measurement Range:
Pipe Size (inch)       Maximum Flow (GPM)
8       760
10       1400
12       2260
15       4130
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Performance Accuracy:
Flow Conditions Accuracy: Percent of Maximum Flow
Open Channel Forward Flow +/- 3%
Reverse Flow +/- 3%
Full Pipe Forward Flow +/- 3% * See Note
Reverse Flow +/- 3%
Full Pipe Below Transition                      +/- 10% * See Note
Open Channel (>90% submergence) Forward Flow +/- 5%
Reverse Flow +/- 5%
*Note: Up to 10' surcharge
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Operating Temperature Range:
Sensors 32° to 120°F (0° to 50°C)
Electronics - 5° to 120°F (- 17° to 50°C)

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Power Requirements:
Standard: Battery powered 8 each D-Cell alkaline; 1 each 9 volt alkaline (memory backup) (Minimum battery life of 90 days at 15 minute data logging intervals)
Optional: 115/ 230VAC ± 15%, 50/ 60Hz, 12VA, w/ 8 each D-Cell NiCd (primary backup) and 1 each 9 volt alkaline (memory backup)

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Electronics:
Enclosure Material: Lightweight structural foam resin
Rating: NEMA 6P submersible (6.0ft for 24 hours)
Dimensions: 12-5/8" x 13-3/4" x 5-7/8" deep
Weight: 15 lbs. (6.8 kg) including standard batteries, sensors, and 25 ft. cable
Desiccant protected
Sensors Type: Stainless steel submersible pressure transducers
Cable: 25 ft. (7.6m) polyurethane outer jacket
Housing: Sealed, watertight PVC (submersible)
Over Range: 11 psi (25 ft. Water)
Air Intake: Atmospheric pressure reference protected by hydrophobic filter

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Flow Tube:  (weights and dimensions shown below)
Sizes:   8, 10, 12, and 15 inches (consult factory for additional flow tube sizes)
Material:    fiberglass reinforced isophthalic polyester resin. Inside surface of white gelcoat.
Hardware:    stainless steel, bubble level with aluminum e, sampler event, and rainfall
Communications
Data Retrieval:    IBM compatible computer
Transfer Protocol:    RS-232 at 9600 baud
Optional:    Modem at 1200 baud (9600 baud available)
Software:    CalcuFlow™ 97 (for Windows® 95)

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Calibration:
NO FIELD CALIBRATION OR FLOW PROFILING REQUIRED
Flow tube pre-calibrated at a NIST traceable flow laboaratory.

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Flow Conditions:
Open channel, Full Pipe, Surcharged, Submerged, and Reverse

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