Kobold Mass Flowmeter, PMS
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PMS Coriolis Mass Flowmeter and Counter

Brand: KOBOLD Instruments, Inc
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Coriolis flow measurement is described as a direct or dynamic technique; it supplies a signal that is proportional to the mass flow, and practically independent of material properties, such as conductivity, pressure, viscosity, or temperature. 

A Coriolis force occurs when linear motion and rotary motion are superimposed on one another. In industrial systems incorporating this principle, mechanical vibrations occur at the point of rotary motion. Fluid flowing through two tubes causes the tubes to resonate. 

The mass flow alters the phase angle of the vibration, which produces a phase difference between the vibration at the tube inlet and that at the tube outlet. This phase difference is proportional to the mass rate of flow; it is amplified to form the output signal. 

The resonance frequency of the measuring tube is a function of the resonating mass in the tube, and therefore a function of the medium density. (A regulating circuit ensures that the system is constantly resonating.) 

The resonance-frequency displacement, which arises from the thermal expansion of the material of the measuring tube, is compensated by temperature measurement. The measured temperature corresponds to the medium temperature

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Specifications

Brand

Accuracy

  • ± 0.35 % of Measured Value ± 0.01 % of Full Scale - Liquids
  • ± 0.75 % of Measured Value ± 0.01 % of Full Scale - Gases

Ambient Temperature Range

  • -20° to 60° C (-4° to 140° F)

Applications

  • Deionized Water
  • Fluids & Low Conductivity Solvents
  • Food Oil
  • Fuel Oil & Gases

BSP Connection

  • G 1/2”

Cable Entry

  • M20 x 1.5

Conduit Connection

  • PG 13.5

Consumption

  • 15 VA
  • 15 W (Dc) - Power Input

Display

  • 2 Line LCD Display Each 16-Digits, Backlit

Electrical Rating

  • 13.5 A (< 50 ms) at 24 Vdc - Max.
  • 3 A (< 5 ms) at 260 Vac - Max.

Enclosure / Body Material

  • Varnished Aluminum Die Casting, Powder-Coated

Environmental Protection

  • IP67
  • NEMA 4X

Flange Material

  • 316 Stainless Steel

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - 150# ANSI
  • 1-1/2” (DN 40) - 300# ANSI
  • 1-1/2” (DN 40) - PN 100
  • 1-1/2” (DN 40) - PN 40

Flange Size - 1” (DN 25)

  • 1” (DN 25) - 150# ANSI
  • 1” (DN 25) - 300# ANSI
  • 1” (DN 25) - PN 100
  • 1” (DN 25) - PN 40

Flange Size - 1/2” (DN 15)

  • 1/2” (DN 15) - 150# ANSI
  • 1/2” (DN 15) - 300# ANSI
  • 1/2” (DN 15) - PN 100
  • 1/2” (DN 15) - PN 40

Flange Size - 2” (DN 50)

  • 2” (DN 50) - 150# ANSI
  • 2” (DN 50) - 300# ANSI
  • 2” (DN 50) - PN 100
  • 2” (DN 50) - PN 40

Flange Size - 3/8” (DN 10)

  • 3/8” (DN 10) - 150# ANSI
  • 3/8” (DN 10) - 300# ANSI
  • 3/8” (DN 10) - PN 100
  • 3/8” (DN 10) - PN 40

Flow Rate

  • 0 to 70,000 kg/h - Water

Frequency

  • 2 to 1000 Hz

Input

  • 3-30 Vdc

Loop Resistance

  • 5 Kilohms
  • 700 ohms, Max.

Materials of Construction

  • 904L Stainless Steel - Measuring Tube

Maximum System Pressure

  • psi: 1,450 (kPa: 10,000, bar: 100)

Media

  • Gas
  • Liquids & Gases

Mounting Position

  • Horizontal
  • Vertical

Nominal Pressure

  • psi: 580.2 (bar: 40, kPa: 4,000)

NPT Connection

  • 1/2” NPT

Output

  • 250 mA
  • 30 Vdc, Max.
  • 4-20 mA
  • Open Collector
  • Passive/Active

Power Requirement

  • 16-62 Vdc
  • 20-55 Vac (45 to 65 Hz)
  • 85-260 Vac (45 to 65 Hz)

Process Temperature

  • -40° to 125° C (-40° to 260° F)

Repeatability

  • ± 0.15 % of Measured Value ± 0.005 % of Full Scale - Liquid
  • ± 0.35 % of Measured Value ± 0.005 % of Full Scale - Gases

Sensor / Probe Material

  • 304 Stainless Steel

Temperature Effect

  • ± 0.002 % of Full Scale/°C

Documentation

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