précision du débitmètre Coriolis, précision des mesures de débit massique, de densité et de températ

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Précision du débit massique Précision de la température Précision de la densité
Précision du débit massique du débitmètre Coriolis
Précision de mesure de densité
Précision de la mesure de la température
Plus de spécifications techniques sur les débitmètres Coriolis
How to Read the Numbers on the Report
Density Measurement Accuracy
Factory Calibration vs Third-Party Calibration
Need a Specific Accuracy or Certificate?
FAQ

Le débitmètre Coriolis de la série SH-CMF a fourni une précision de 0,1 ~ 0,2% de la mesure du débit massique, c'est le débitmètre le plus précis , ce type de débitmètre de haute précision est maintenant fréquemment demandé et acheté ces dernières années. Le compteur Coriolis est une avancée majeure dans la mesure du débit massique; il peut mesurer le débit massique, la température et la densité des fluides par un seul capteur de débit.

Lorsque nous parlons de la précision des débitmètres Coriolis , nous devons tenir compte de 3 facteurs:

coriolis flow meter accuracy calibration

Précision du débit massique
Précision de la température
Précision de la densité

Voyons ci-dessous trois images pour l'excellente précision du débitmètre SH-CMF mss.

Précision du débit massique du débitmètre Coriolis

Précision du débit instantané: ± 0,2%, débit ± [(stabilité nulle / valeur de débit) × 100]%

Temps de réponse du débit: 1 seconde (réglable)
coriolis flow meter accuracy

Précision de mesure de densité

Précision de densité: ± 0,002g / cm³ (liquide)

SH CMF Coriolis mass flow meter nameplate

Précision de la mesure de la température

Précision de la température: ± 1 ° C
coriolis meter temperature accuracy

coriolis low flow error zero stability curve

Plus de spécifications techniques sur les débitmètres Coriolis

Débitmètre Coriolis

calibration report of coriolis flow meter DN10 1

Field	What it tells you
Testing medium, temperature, pressure	Test conditions; water at about 15 °C and 0.2 MPa
Flow range and instrument range	The range set for your order, e.g. 60–600 kg/h; not necessarily the full sensor range
Range percentage and tested value	The 4 test points: full scale, then 50%, 20% and 10% of the set range
Average accuracy Ei	The error at each test point, in %
Accuracy level E	The largest error found across all points
Repeatability Er	How closely repeated runs agree
Output type	Pulse factor, e.g. 60,000 pulses per kg
Precision curve	The Ei values plotted against the test points

Our calibration information page describes the test rigs and methods used at the factory.

calibration report of coriolis flow meter DN10

How to Read the Numbers on the Report

Reading the report means checking that every test point is inside the ordered grade, and then looking at how the error changes across the range. Two recent SH-CMF reports show how this works.

Point	DN10 meter, ±0.2% grade, range 600 kg/h	3" meter, ±0.5% grade, range 12 t/h
Full scale	600 kg/h: −0.16%	12 t/h: −0.09%
50%	300 kg/h: −0.13%	6 t/h: −0.06%
20%	120 kg/h: −0.14%	2.4 t/h: −0.12%
10%	60 kg/h: −0.08%	1.2 t/h: −0.17%
Accuracy level E	−0.16%	−0.17%
Repeatability Er	0.03%	0.03%

Three points to check on any report:

Every Ei is inside the grade. For the DN10 meter, the largest error is 0.16%, inside ±0.2%. For the 3" meter, all points are well inside ±0.5%.
The tested range matches your process. The 3" meter was tested at 1.2–12 t/h because that was the range set for the order. If your real flow is outside the tested range, ask for the test points to be set to your range before shipment.
Repeatability is much smaller than the error. An Er of 0.03% means the meter gives the same answer each time; a small, steady offset is what calibration is designed to measure.

The serial number on the report should match the nameplate. Keep the report with the meter records; it is the baseline for any later recalibration.

Density Measurement Accuracy

Density measurement accuracy on the SH-CMF is typically ±0.001 to ±0.002 g/cm³ for liquids, within a density range of about 0.5–2.5 g/cm³. The meter measures density from the vibration frequency of the tubes, and the reading can be shown on the display or sent as a 4–20 mA output. Temperature measurement accuracy is ±1 °C.

The standard factory report does not include a density or temperature test; it covers mass flow only. If density is used for concentration, Brix or quality control, tell us at the order stage so the density requirement is reviewed before the meter is built. Questions on density outputs, gas service and other options are answered in the SH-CMF FAQ.

Factory Calibration vs Third-Party Calibration

Factory calibration is the standard water test done on every meter before shipment, while third-party calibration is an extra test at an independent laboratory, used when a contract, regulator or auditor requires it.

Point	Factory calibration	Third-party calibration
Included as standard	Yes	No, extra cost
Delivery time	Standard (10–12 working days for standard configurations)	Longer
Test medium	Water	Depends on the laboratory
When to choose	Process control, batching, internal accounting	Custody transfer, contracts or audits that name an independent laboratory

Water is the normal test medium because a Coriolis meter measures mass directly, so a mass calibration on water applies to other liquids. Recalibration is usually recommended every one to two years. Shipping a meter back to the factory overseas is costly, so most users recalibrate at a local independent facility and compare the result with the original report.

Need a Specific Accuracy or Certificate?

Send us these details and we will confirm the grade, sizing and documents you need:

Fluid, flow range (minimum, normal, maximum), temperature and pressure
Required accuracy and whether the reading is used for billing
Whether you need density, and the accuracy required
Any documents required: factory report only, or third-party calibration

Silver Automation Instruments replies within 24 hours with a recommended model code and quotation. Contact our engineers with your details.

FAQ

Does every Coriolis meter ship with a calibration report?

Every SH-CMF Coriolis meter is water-tested at 4 flow points before shipment and comes with a factory calibration report showing the error at each point, the repeatability and the accuracy grade passed. A copy can be requested later by quoting the factory number on the nameplate.

Is a ±0.1% meter worth it over ±0.2%?

A ±0.1% meter is worth it when the reading is used for billing or high-value products and the meter runs mostly above 20% of its range. For process control and most batching, ±0.2% is the common choice; about three in four of the SH-CMF meters we supplied were ordered at ±0.2%.

Can the meter be calibrated with oil instead of water?

The standard factory calibration uses water, which is normal for Coriolis meters because mass flow measurement does not depend on the fluid. If a contract requires calibration on a specific fluid, tell us at the enquiry stage so the options can be checked.

Is density included in the calibration report?

Density is not included in the standard calibration report, which covers mass flow only. Density accuracy for liquids is typically ±0.001 to ±0.002 g/cm³. If density is critical for your process, state the requirement when ordering.

How often should a Coriolis meter be recalibrated?

A Coriolis meter is usually recalibrated every one to two years, or as required by your quality system. Between calibrations, a zero check at operating conditions and a comparison against a weighed batch are simple ways to confirm the meter is still in tolerance.

Précision du débitmètre Coriolis

Précision du débit massique Précision de la température Précision de la densité