Yokogawa Flowmeter Calibration Services: Delivering Trust and Peace of Mind
As a flowmeter manufacturer known for high quality, high accuracy, and high reliability, Yokogawa has been chosen by customers for many years. To help customers use our products with greater peace of mind, Yokogawa provides flow calibration services.
Our calibration laboratories are accredited to ISO/IEC 17025 and can issue MRA-marked calibration certificates, enabling metrologically traceable calibration of products prior to shipment. Because we perform calibration at our own factories as the flowmeter manufacturer, we can provide highly reliable calibration and adjustment. Yokogawa supports customers throughout the product lifecycle based on the Total Insight concept.
Please evaluate our flow calibration services.
Details
About Calibration
What Is Calibration?
Calibration is defined as "operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication." *
This means that it is necessary to obtain calibration values and their measurement uncertainty based on metrologically traceable calibration.
Purpose of Calibration
The primary purpose of calibration is to determine calibration values and their measurement uncertainty under fully traceable conditions. The purposes of obtaining these include verification of proper instrument performance, meeting audit requirements, and compliance with internal rules.
Why Is Calibration Required?
By performing calibration with metrological traceability, the reliability of measured values can be evaluated. In addition, traceability is maintained when appropriate calibration intervals are set for measuring instruments.
To achieve reliable measurements, it is important to calibrate at appropriate intervals. Furthermore, the need for calibration is increasing, as requirements for calibration based on fully traceable standards are increasingly specified in various laws, regulations, and standards.
What Is Measurement Uncertainty?
Measurement uncertainty is "non‑negative parameter characterizing the dispersion of the quantity values being attributed to a measurand, based on the information used." *
It can also be considered an interval that is expected to contain the value attributable to the measurand, under stated conditions. In general, calibration certificates often report expanded uncertainty with a coverage factor of k = 2, corresponding to an approximate 95% level of confidence.
What Is Traceability?
According to the VIM, 3rd edition, traceability is "property of a measurement result whereby the result can be related to a reference through a documented unbroken chain of calibrations, each contributing to the measurement uncertainty." *
In general, it is achieved through the following six elements. *
(1) An unbroken metrological traceability chain to an international measurement standard or a national measurement standard
(2) A documented measurement uncertainty
(3) A documented measurement procedure
(4) Accredited technical competence
(5) Metrological traceability to the SI
(6) Calibration intervals
Calibration compliant with ISO/IEC 17025 generally supports metrological traceability requirements, so a separate traceability diagram may not be necessary where accredited certificates are accepted.
* Source: ISO/IEC Guide 99:2007 (VIM: International Vocabulary of Metrology – Basic and General Concepts and Associated Terms)
Calibration Types
General Calibration and Accredited Calibration
- General calibration
Calibration is performed by the manufacturer or a calibration service provider based on their own standards. The declaration of uncertainty and whether traceability is provided may vary depending on the provider.
- ISO/IEC 17025-compliant calibration
When calibration is performed within the accredited scope of an accredited provider, metrological traceability requirements are generally satisfied.
Calibration Sites
- Calibration performed at permanent laboratories
Calibration is performed at the manufacturer’s or a calibration service provider’s facilities, either at the time of shipment or after the product is returned by the customer.
- On-site calibration
Calibration is performed outside the facilities of the calibration service provider, such as at the customer’s site. While calibration uncertainty is often higher than for calibration performed at permanent facilities, on-site calibration has the advantage of allowing calibration at the customer’s site.
Calibration Interval
The calibration interval for the instrument needs to be appropriately set by the customer. The appropriate calibration interval depends on the required measurement uncertainty, operating conditions, and instrument stability. The following are examples of how to determine a calibration interval.
- Initially, a short calibration interval is recommended, and it may be extended after the stability of the instrument has been confirmed.
- If the instrument has sufficient operating history and an appropriate calibration interval has been established, that interval may be applied.
Overview of Our Calibration Facilities
Rota Yokogawa (Germany)
About the Factory
Rota Yokogawa GmbH & Co. KG (Germany) mainly manufactures Coriolis flowmeters and variable area flowmeters (Rotameter).
With many years of experience in calibration services, we offer a customer-oriented service that meets a wide range of needs.
Calibration Facility Overview
Rota Yokogawa has a calibration facility capable of handling various types of flowmeters, with a calibration and measurement capability (CMC) of up to 0.025%. Water calibration of up to 900 m³/h and a nominal diameter of 250 mm.
The calibration laboratory is accredited by DAkkS in Germany in accordance with ISO/IEC 17025. For products calibrated at Rota Yokogawa, an MRA-marked calibration certificate can be issued. As a result, the calibration results are accepted internationally among MRA signatories.
If you send us your cleaned flowmeter, the calibrated instrument will be returned within 8 working days. Readjustment is also available upon request. An express calibration service, in which calibration is completed within 48 hours, is available upon request. This minimizes downtime at the customer’s facility.
Yokogawa Electric China
About the Factory
Yokogawa Electric China Co., Ltd. mainly manufactures magnetic flowmeters and vortex flowmeters.
Calibration Facility Overview
Yokogawa Electric China has a calibration facility capable of handling various types of flowmeters, with a calibration and measurement capability (CMC) of 0.06%. The calibration laboratory is accredited by ASNITE in Japan in accordance with ISO/IEC 17025.
For products calibrated at Yokogawa Electric China, an MRA-marked calibration certificate can be issued. As a result, the calibration results are accepted internationally among MRA signatories.
List of Applicable Models
Note 1: The applicable range varies depending on the product and the calibration facility where calibration is performed.
Note 2: Please refer to the respective General Specifications for details.
Note 3: For other models, please contact your Yokogawa representative.
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ROTAMASS Total Insight
It is the most technologically advanced mass flowmeter yet. By combining the superior design of the application specific flow sensor and transmitters with the Total Insight philosophy and functionality, the flexibility of the Rotamass to adapt to changing requirements guarantees performance throughout the lifecycle of the process measurement.
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ADMAG AXG
The ADMAG TI series AXG is ideal for industrial process lines like oil & gas/chemical/pulp & paper/food & beverage/metal & mining applications. With outstanding reliability and ease of operation and maintenance, developed on decades of field-proven experience, the AXG will increase user benefits while reducing total cost of ownership.
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ADMAG AXW
The ADMAG TI series AXW is ideal for general industrial process lines and water supply/sewage applications. The sizes are available from 25 mm to 1800 mm. Besides fluorocarbon PTFE, lining can be selected from various rubber linings.
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Magnetic Flowmeter CA Series
The CA Series promises stable measurement even for fluids that are considered difficult to measure, such as slurry fluids and adhesive fluids. The design based on the Total Insight concept improves operability and maintainability for customers.
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