只是贴纸？认证您的测量工具的价值

Proving that your total station or MultiStation is within specification is crucial to assure the services that you provide deliver the right standards and accuracy. In this Q&A Wolfgang Hardegen, Manager of the Leica Geosystems Accredited Calibration Laboratories, based in Heerbrugg, Switzerland talks about the highly accurate calibration services for total stations and MultiStations offered by Leica Geosystems.

Wolfgang, what makes Leica Geosystems’ calibration service facilities special?

徕卡Geosystems is the only surveying instrument manufacturer in the world running accredited calibration laboratories for distances and angles in-house, which issues calibration certificates in accordance with ISO/IEC 17025 granted by the Swiss Accreditation Service (SAS).

自1997年以来，我们经营了认可的校准实验室，这些实验室在瑞士海尔布鲁格（Heerbrugg）提供了各种校准证书。经认可的实验室校准证书确保测量设备的准确性。拥有如此准确的内部实验室，可以使Leica Geosystems具有很大的优势 - 在开发和制造过程中，我们随时都有在实验室进行测试的可能性。

为什么整个站或多阶段的校准如此重要？

From time to time, it is necessary to send an instrument to service for calibration. Calibration makes sure that the instrument meets the manufacturers specifications and customer’s requirements regarding measurement accuracies.

徕卡Geosystems offers 4 levels of calibration, Gold, Silver, Bronze and Blue, which confirm the measurement quality of new or used surveying equipment.

有关校准证书的更多信息read the white paperorvisit the Leica Geosystems calibration certificates page.

徕卡Geosystems is offering a wide range of calibration certificates. What is special about the Calibration Certificates Gold?

Our Certificate Gold is a special calibration certificate which may only be issued by an Accredited Calibration Laboratory. Such a high-level calibration is perfect for total stations and MultiStations which are used by ISO 9001 certified companies and for major projects and tenders with public interest (e.g. public health, public safety or selected legal procedures).

经认可的校准实验室颁发的校准证书是根据国际承认的ILAC MRA (Mutual Recognition Agreement). The test results are directly traceable to national standards and they include measurement uncertainties with detailed measurement reports.

How is accreditation organised internationally?

Within a global approach in cooperation with the World Trade Organisation (WTO), certificates are internationally recognised in over 100 countries. The WTO has established theInternational Laboratory Accreditation Cooperation (ILAC)，管理国际安排。欧洲的区域安排由European Cooperation for Accreditation (EA)，与ILAC和谐合作的全球五个区域合作机构之一。国家认证机构Swiss Accreditation Service (SAS)是这些国际组织的成员，并负责实验室的认证。

要查找有关利卡地理系统认可的实验室的官方信息，请visit the Swiss Accreditation Service (SAS) website并选择SCS 0079.该文档列出了Leica GeoSystems认可的实验室所具有的特定测量精度和不确定性的测试功能。

What are the efforts to run accredited laboratories for the calibration of total stations?

徕卡Geosystems' basis to gain the status of an accredited laboratory is the quality management system in accordance with ISO 9001. Additional to the technical infrastructure and highly trained and qualified staff, every single calibration process which we use in the laboratories must be checked, verified and accepted in detail by external experts from the national accreditation body (SAS).

Yearly audits by the SAS in accordance to ISO/IEC 17025 make sure that the laboratories keep the highest possible standards during the operation. Every five years the accreditation must be renewed by the Swiss Accreditation Service (SAS) through an extensive audit.

Leica Geosystems拥有多少个认可的校准实验室，每个实验室的目的是什么？

我们运营四个校准实验室和一个测试实验室。

1.角度的校准实验室

Calibration of angles is a very difficult and elaborate task. Worldwide there are only a few institutions who can offer a similar high accuracy.

Since we could not find an institution offering the measurement quality we would have expected, we decided, about 20 years ago, to develop the first theodolite testing machine (TPM) on our own. This complex machine automatically checks the horizontal circle and zenith angles. With a measurement uncertainty of 0.09” (Hz und V), this testing machine is highly accurate.

2. Baseline Open-Air Laboratory

Situated open-air on the bank of the Rhine river, the baseline open-air laboratory is not a typical laboratory. It consists of 7 pillars with a straight line of sight with no obstructions up to three kilometres. This allows us to check the standard deviation of distance measurements over long lengths of 500 m, 1,000 m, 2,000 m, or 3,000 m. During this exercise, we accurately determine atmospheric parameters, such as temperature, pressure, and humidity, crucial to achieve the highest accuracy.

3. Calibration Laboratory for Distance

在距离的校准实验室中，我们确定了60 m和120 m的距离线性的绝对距离偏差和偏差。将测试总站的结果与高度精确的干涉仪的结果进行了比较。亚博5分钟快三

4. Calibration Laboratory for Frequency

In simple words, in this laboratory we check the accuracy of the scale of electronic distance meters (EDM) by comparing the output frequency with a reference frequency. This is done in a climate chamber that is set to several temperatures between - 20° C and + 50° C.

5.测试激光分类实验室

In this laboratory, we measure the output power of lasers to classify the laser.

In conclusion, customers sending their instruments to the Leica Geosystems Accredited Calibration Laboratories can be sure that all steps will be correctly executed and their equipment is in the best hands.

Wolfgang, thank you for sharing your insights with us.
The pleasure is mine.

Wolfgang Hardegen
Manager Accredited Laboratories
徕卡Geosystems AG, Heerbugg, Switzerland