Design Specifications
DSB27X
TM BiRotor Plus Revision 08
Models B271, B274, B281, B284
DESCRIPTION
The BiRotor Plus™ meter is a volumetric flow measuring device designed for the accurate measurement of petroleum liquids in a variety of applications. This double case meter combines the rugged durability and long service life of the traditional BiRotor meter with the improved accuracy and pulse output associated with today’s most sophisticated devices.
Utilizing single or dual outputs, with two non-wetted pickoffs mounted 90° electrically out of phase, the BiRotor Plus complies with API Level B pulse output standards. Output signals are amplified and shaped by a preamplifier mounted directly on the meter for transmission to accessories such as totalizing counters, digital readout devices, provers and other control equipment and instrumentation.
Typical applications includes loading/unloading, batching, blending and inventory control of petroleum products where accuracy and repeatability are the deciding factors in meter selection. It is recommended for loading and unloading tankers, railcars or trucks, pipelines, aircraft refueling, and general purpose flow measurement.
DESIGN FEATURES
•Double case construction avoids loss of calibration due to changes in pressure or temperature
•New rotor profile provides high resistance to air slugs and entrained solids
•No metal-to-metal contact
•Dual pulse output meets Level B pulse security described in API manual, Chapter 5.5.4.4.
•Explosion proof amplifier housing
•Single or dual pulse output - non-wetted pickoffs
•Reduced number of parts reduces maintenance requirements.
•Variety of readout instrumentation available
•Horizontal or vertical mounting
•Class I, Division 1, Group C & D, NEMA 4X, UL, cUL , ATEX, Eexd IIBT6, NTEP, CRN (Canada) and Industry Canada (Canada), OMIL
•Bi-Directional flow capability (Consult Factory)
•Capable of operating @ 400 cst. max viscosity
SUPERIOR PERFORMANCE
Linearity:
±0.10% over 13:1 flow range (3”)
±0.075% or better over 30:1 flow range (4”) Repeatability: ±0.01%
Premimum Linearity of less than 0.075% available (4” only) (Consult Factory)
Pick-off Temperature
Standard: -20 to 180°F (-29 to 82°C)
MATERIALS OF CONSTRUCTION
Housing: Carbon Steel
Measuring Unit
End Plates: Cast Aluminum
Rotors: Cast Aluminum, Hard Anodized Rotor Shafts: 17-4 ph Stainless Steel
Rotor Bearings: Stainless Steel Ball Bearings O-Rings: Viton Standard (Other elastomers available)
SPECIFICATIONS - Electrical
Dual channel preamplifier
Single or dual, non-wetted, reluctance pick-offs
Preamplifier Performance
Inputs
Supply Voltage: 10 to 30 Vdc Sensor Type: Reluctance Type: Sine Wave
Amplitude: 40 mV peak to peak minimum Outputs
Powered Pulse Output Type: Square Wave
Frequency Range: 0 to 5 kHz Amplitude : 0 to 5 V
1 kOhm interval pull-ups, 20 mA max. Variable Voltage Output
Type: Square Wave Frequency Range: 0 to 5 kHz. Amplitude: 0 to Supply Voltage
1 kOhm internal pull-ups, 70 mA max. Open Collector Output (Per Channel)
Type: Square Wave Frequency Range: 0 to 5 kHz. Max. Voltage: 30 Vdc
Max. Current: 125 mA Max. Power: 0.5 watts
Temperature: -20 to 180°F (-29 to 82°C)
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