Emerson CMF200A Bedienungsanleitung PDF herunterladen (Seite 20)

20 Micro Motion

ELITE

Flow and Density Meters

Environmental effects

Process temperature effect

Process temperature effect is defined as:

• For mass flow measurement, the worst-case zero offset due to process fluid temperature change away from the zeroing

temperature.

• For density measurement, the maximum measurement offset due to process fluid temperature change away from the density

calibration temperature.

Process temperature effect

% of maximum flow rate per °C density accuracy per °C

(1)

(1) For –100 °C and above.

g/cm

kg/m

CMFS010, CMFS015,

CMF010, CMF025,

CMF050, and CMF100

±0.0002 ±0.000015 ±0.015

CMF200 ±0.0005 ±0.000015 ±0.015

CMF300 ±0.0005 ±0.000015 ±0.015

CMF400 ±0.0007 ±0.000015 ±0.015

Pressure effect

Pressure effect is defined as the change in sensor flow and density sensitivity due to process pressure change away from the

calibration pressure. Pressure effect can be corrected.

Pressure effect on flow accuracy

% of rate per psi % of rate per bar

liquid gas liquid gas

CMFS010 None None None None

CMFS015 None None None None

CMF010 None None None None

CMF025 None None None None

CMF050 None None None None

CMF100 –0.0002 None –0.003 None

CMF200 –0.0008 –0.0004 –0.012 –0.006

CMF300 –0.0006 –0.0003 –0.009 –0.0045

CMF400 –0.0015 –0.0015 –0.022 –0.022

Pressure effect on density accuracy

g/cm

per psi kg/m

per bar

CMFS010 None None

CMFS015 None None

CMF010 None None

CMF025 0.000004 0.058

CMF050 –0.000002 –0.029

CMF100 –0.000006 –0.087

CMF200 –0.000001 –0.0145

CMF300 –0.0000002 –0.0029

CMF400 –0.00001 –0.145

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