Technical note
SI Traceability of Calibration for Distance Measurement - Vaisala Lidar Ceilometer CL61
The Vaisala Ceilometer CL61 units are individually calibrated at the Vaisala factory. Figure 1 illustrates the traceability chain of distance measurement calibration to International System of Units (SI). The working standard is a reference fiber optic delay-line. Traceability of the standard to SI units is established through an unbroken chain of documented time delay calibrations by National Metrology Institute (VTT-MIKES, Finland).
The calibration certificate provides details on the reference fiber optic delay-line. The working standard is calibrated regularly by VTT-MIKES. To guarantee consistent quality of calibration, process instrument changes are managed according to ISO 9001:2015 Quality Management System and the ISO 10012:2003 normative reference. The uncertainty of the calibration is determined according to JCGM 100:2008 (Evaluation of measurement data — Guide to the expression of uncertainty in measurement).
...
Ultra-reliable, ultrasonic
Vaisala Weather Transmitter WXT530 series is a unique collection of cost-effective sensors that accurately and reliably measure weather conditions…
What relative humidity, dew point, absolute humidity and mixing ratio are, how temperature and pressure distort the reading, and why dew point is…
How humidity behaves in real conditions, the three most common measurement problems, and two practical scenarios —heated air and compressed air—…
When to measure relative humidity vs. dew point, what high and low humidity demand, how temperature and pressure factor in, and when a warmed probe…
Cooling accounts for up to 40% of a data center's energy demand. This Vaisala guide explains how measurement accuracy cuts costs and risks, with a…
A specialist replies with the solution, the instrument and the service that fit.
Instruments to quote
No instruments yet. An enquiry can be sent anyway: a specialist answers.
