Emerson CMF200A Uživatelský manuál stáhnout pdf (Strana 3)

Micro Motion

2-Wire Coriolis Flow and Density Meters 3

Liquid flow performance

Mass Volume

(1)

(1) Specifications for volumetric flow rate are based on a process-fluid density of 1000 kg/m

. For fluids with density other than

1000 kg/m

, the volumetric flow rate equals the mass flow rate divided by the fluid’s density.

kg/h l/h

Maximum flow rate CMF025 2180 2180

CMF050 6800 6800

CMF100 27200 27200

CMF200 87100 87100

Mass and volume flow accuracy

(2)

(2) Stated flow accuracy includes the combined effects of repeatability, linearity, and hysteresis. All specifications for liquids are based on

reference conditions of water at 20 to 25 °C and 1 to 2 bar, unless otherwise noted.

±0,10% of rate

(3)

(3) When flow rate is less than zero stability / 0,001, accuracy = ±[(zero stability / flow rate) × 100]% of rate and

repeatability = ±[½(zero stability / flow rate) × 100]% of rate.

Mass and volume flow repeatability ±0,05% of rate

(3)

kg/h

Zero stability CMF025 0,027

CMF050 0,163

CMF100 0,680

CMF200 2,18

Typical accuracy and turndown

The graph below is an example of the relationship between accuracy and turndown on water. To determine actual accuracy and

turndown with your process variables, use the Micro Motion product selector, available at www.micromotion.com.

–2.5

–2.0

–1.5

–1.0

–0.5

0.5

1.0

1.5

2.0

2.5

1009080706050403 020100

100:1

20:1

10:1

1:1

Flow rate, % of maximum

Accuracy, %

Turndown 500:1 100:1 20:1 10:1 1:1

Accuracy (±%) 2,40 0,50 0,10 0,10 0,10

2.5

2.0

1.5

1.0

0.5

–2.5

–2.0

–1.5

–1.0

–0.5

0 10 20 30 40 50 60 70 80 90 100

1 2 3 4 5 6 7 8 ... 23 24

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