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.
详细介绍
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
它是技术非常先进的质量流量计。通过将特定应用的流量传感器和变送器的优良设计与 Total Insight 理念和功能相结合，Rotamass 非常灵活，可以适应不断变化的要求，从而保证整个过程测量生命周期内的性能。
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ADMAG AXG
ADMAG TI系列AXG非常适合石油天然气/化工/制浆造纸/食品和饮料/金属和采矿应用等工业生产线。AXG具有出色的可靠性以及易于操作和维护的特点，基于数十年的现场验证经验开发而成，将增加用户效益，同时降低总拥有成本。
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ADMAG AXW
ADMAG TI系列AXW是一般工业生产线和供水/污水应用的理想选择。尺寸从 25 mm到1800 mm不等。除了氟碳PTFE 外，衬里还可以从各种橡胶衬里中选择。
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电磁流量计CA系列
CA系列即使对于难以测量的流体（如浆料和粘附性流体）也能进行稳定的测量。基于Total Insight概念的设计提高了可操作性和可维护性。
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